ntrs.nasa.gov...Data Report for December 1976 through March 1978 on A DEPOLARIZATION AND ATTENUATION...

Data Report for December 1976through March 1978

on

A DEPOLARIZATION AND ATTENUATION EXPERIMENTUSING THE COMSTAR AND CTS SATELLITES

{NASA-CE-/5^

Data Report for December 1976through March 1978

on

A DEPOLARIZATION AND ATTENUATION EXPERIMENTUSING THE COMSTAR AND CTS SATELLITES

Text by

C. W. BostianE. A. ManusR. E. MarshallW. P. OverstreetR. R. PersingerJ. D. PowellP. SantagoW. L. StutzmanP. H. Wiley

Graphics by

Cynthia R. Will

Electrical Engineering DepartmentVirginia Polytechnic Institute and State University

Blacksburg, Virginia 24061

Prepared for

NASA Goddard Space Flight CenterGreenbelt, Maryland 20771

Contract NAS5-22577

April 28, 1978

1. Report No. 2. Government Accession Ma.

4. Till* end Subtitle

A Depolarization and Attenuation ExperimentUsing the COMSTAR and CIS Satellites

7. Autho,fi->c.W. Bostaap.t-.A. ManuSjK.h-. Marsnaj i ,O* Overstree.t,K.R:,Persinger| J..D. Powell,P Santano w IT StutzF13" P H wi i fwJ. Performing Tirgoni ration Name and

Department of Electric340 Whittemore HallVPI&SU, Blacksburg, Vi

12* Sponsoring Agency Ham* and Addri

NASA Goddard Space FliGreenbelt, Md. 20771E. Hirschmann, Code 95

Address

al Engineering

rginia 24061nght Center

3, Technical Officer

3. Recipient's Catalog No.

5. Report Dale

6. Performing Organitation Code

8. Performing Organitotion Report Mo.

1978-210. Ward Unit No.

11. Contract or Giant No.NAS5-22577

Data Report:Dec. 76 - March 78

14. Sponsoring Agency Code

15. Supplementary Nates

16. Abstract

This report presents monthly statistical data on groundrainfall rate and attenuation on satellite downlinks at 11.7 GHz,19.04 GHz, and 28.56 GHz and on cross-polarization isolation at11.7 GHz. Regression equations for relating isolation to attenuation,attenuation to rain rate, and attenuation at one frequency toattenuation at another frequency are also included. Longer-termstatistics are also presented and discussed.

17. Key Words (Selected by Author(t)) . 18. Distribution Statement

polarization, depolarization,attenuation, millimeter wavepropagation, communications satellites , UnlimitedCTS, COMSTAR, percent-of-time,frequency scaling, monthly statistics

19. Security Cloiilf. (ol (hit r.po«l)

u20. Security Clo>li(. (of (hit page)

U21. Ho. of Pogn 22. P r i ce*

* For »alo by the National Technical Information Service, Springfield, Virginia 221 51.

TABLE OF CONTENTS

Page

1. INTRODUCTION 1

1.1 Description of the Report 1

1.2 Guide to Related Literature 1

1.3 Discussion of the Report Contents 2

2. MONTHLY DATA 6

2.1 December, 1976 11

2.2 January, 1977 15

2.3 Debruary, 1977 19

2.4 March, 1977 20

2.5 April, 1977 ; 29

2.6 May, 1977 37

2.7 June, 1977 48

2.8 July, 1977 58

2.9 August, 1977 68

2.10 September, 1977 79

2.11 October, 1977 89

2.12 November, 1977 98

2.13 December, 1977 106

2.14 January, 1978 116

2.15 February,. 1978 127

2.16 March, 1978 135

LONG-TERM STATISTICS 144

3.1 Introduction 144

3.2 Calendar Year 1977 less February 145(j

3.3 June, 1977, through March, 1978 - 145

3.4 July, August, and September, 1977 145

3.5 October, November, and December, 1977 145

3.6 January, February, and March, 1978 146

3.7 July through November, 1977 . . 146

3.8 July through October and December, 1977 146

LIST OF TABLES

Key parameters for the month of December, 1976.

Page

12Table 2.1-1.

Table 2.1-2. Attenuation and rain rate percent-of-time datafor December, 1976 14

Table 2.2-1. Key parameters for the month of January, 1977 16

Table 2.2-2. Attenuation and rain rate percent-of-time datafor January, 1977

Table 2.4-1. Key parameters for the month of March, 1977 21

Table 2.4-2. Attenuation and rain rate percent-of-time datafor March, 1977. (Values for 19 and 28 GHzestimated from 11 GHz data.) 24

Table 2.4-3. Percent of time that 11.7 GHz isolation wasless than the indicated value for March, 1977 26

Table 2.4-4. Regression equations for the month of March, 1977. . . 28

Table 2.5-1. Key parameters for the month of April, 1977 30

Table 2.5-2. Attenuation and rain rate percent-of-time datafor April, 1977. (Values for 19 and 28 GHz areestimated from 11 GHz data.) 33

Table 2.5-3. Percentage of time that 11.7 GHz isolation wasless than the indicated value for April, 1977 34

Table 2.5-4. Regression equations for the month of April, 1977. . 36

Table 2.6-1. Key parameters for the month of May, 1977 38

Table 2.6-2. Attenuation and rain rate percent-of-time datafor May, 1977. Note: 19 GHz points are scaled. . . 41

Table 2.6-3. Percentage of time that 11.7 GHz isolation was lessthan the indicated value for May, 1977 44

Table 2.6-4. Regression equations for the month of May, 1977. . . 47

Table 2.7-1. Key parameters for the month of June, 1977 49

Table 2.7-2. Attenuation and rain rate percent-of-time datafor June, 1977 52

Paqe

Table 2.7-3. Percentage of time that 11.7 GHz isolation was lessthan the indicated value for June, 1977 54

Table 2.7-4. Regression equations for the month of June, 1977. . . 57

Table 2.8-1. Key parameters for the month of July, 1977. 59

Table 2.8-2. Attenuation and rain rate percent-of-time datafor July, 1977 62

Table 2.8-3. Percentage of time that 11.7 GHz isolation was lessthan the indicated value for July, 1977. . 64

Table 2.8-4. Regression equations for the month of July, 1977. . . 67

Table 2.9-1. Key parameters for the month of August, 1977 69

Table 2.9-2. Attenuation and rain rate percent-of-time datafor August, 1977 : 72

Table 2.9-3. Percentage of time that 11.7 GHz isolation was lessthan the indicated value for August, 1977 75

Table 2.9-4. Regression for the month of August, 1977 78

Table 2.10-1. Key parameters for the month of September, 1977. ... 80

Table 2.10-2. Attenuation and rain rate percent-of-time datafor September, 1977 83

Table 2.10-3. Percentage of time that 11.7 GHz isolation wasless than the indicated value for September, 1977. . . 85

Table 2.10-4. Regression equations for the month of September, 1977. 88

Table 2.11-1. Key parameters for the month of October, 1977 90

Table 2.11-2. Attenuation and rain rate percent-of-time data forOctober, 1977 93

Table 2.11-3. Percentage of time that 1.1.7 GHz isolation was lessthan the indicated value for October, 1977 95

Table 2.11-4. Regression equations for the month of October, 1977. 97

Table 2.12-1. Key parameters for the month of November, 1977. ... 99

Table 2.12-2. Attenuation and rain rate percent-of-time data forNovember, 1977 102

Page

Table 2.12-3. Percentage of time that 11.7 GHz isolation was lessthan the indicated value for November, 1977 104

Table 2.12-4. Regression equations for the month of November, 1977. 105

Table 2.13-1. Key parameters for the month of December, 1977. . . . 107

Table 2.13-2. Attenuation and rain rate percent-of-time data forDecember, 1977. Data for 11.7 GHz were invalidatedby spacecraft maneuvers 110

Table 2.13-3. Percentage of time that 11.7 GHz isolation was lessthan the indicated value for December, 1977 112

Table 2.13-4. Regression equations for the month of December, 1977. 115

Table 2.14-1. Key parameters for the month of January, 1978 117

Table 2.14-2. Attenuation and rain rate percent-of-time data forJanuary, 1978 120

Table 2.14-3. Percentage of time that 11.7 GHz isolation was lessthan the indicated value for January, 1978. 122

Table 2.14-4. Regression equations for the month of January, 1978. . 126

Table 2.15-1. Key parameters for the month of February, 1978. ... 128

Table 2.15-2. Attenuation and rain rate percent-of-time data forFebruary, 1978 131

Table 2.15-3. Percentage of time that 11.7 GHz isolation was lessthan the indicated value for February, 1978 132

Table 2.15-4. Regression equations for the month of February, 1978. 134

Table 2.16-1. Key parameters for the month of March, 1978 136

Table 2.16-2. Attenuation and rain rate percent-of-time data forMarch, 1978 139

Table 2.16-3. Percentage of time that 11.7 GHz isolation was lessthan the indicated value for March, 1978 141

Table 2.16-4. Regression equations for the month of March, 1978. . . 143

Table 3.2-1. Attenuation and rain rate percent-of-time data forthe calendar year 1977 less February 149

Table 3.3-1. Attenuation and rain rate percent-of-time data forJune 1977 through March 1978 155

Page

Table 3.4-1. Attenuation and rain rate percent-of-time data forJuly, August, and September, 1977 161

Table 3.4-2. Regression equations for July, August, and September,1977 164

Table 3.5-1. Attenuation and rain rate percent-of-time data forOctober, November, and December, 1977 167

Table 3.6-1. Attenuation and rain rate percent-of-time data forJanuary, February, and March, 1978. The attenuationvalues were caused by frozen or freezing precipitationwhich the rain gauges did not record 172

Table 3.7-1. Attenuation and rain rate percent-of-time data forJuly through November, 1977 177

Table 3.7-2. Regression equations for the period July throughNovember, 1977 180

Table 3.8-1. Attenuation and rain rate percent-of-time data forJuly, August, September, October, and December, 1977. 183

Table 3.8-2. Regression equations for the period July, August,September, October, and December, 1977. . 187

LIST OF FIGURES

Page

Figure 2.1-1. Attenuation statistics for December, 1976 13

Figure 2.2-1. Attenuation statistics for January, 1977 17

Figure 2.4-1. Rain rate statistics for March, 1977 22

Figure 2.4-2. Attenuation for March 1977. (Values for 19 and28 GHz are estimated from 11 GHz data.) 23

Figure .2.5-1. Rain rate statistics for April, 1977 31

Figure 2.5-2. Attenuation statistics for April, 1977. (Values for19 and 28 GHz are estimated from 11 GHz data.) ... 32

Figure 2.6-1. Rain rate statistics for May, 1977 39

Figure 2.6-2. Attenuation statistics for May, 1977. (Values for19 GHz are estimated.) 40

Figure 2.7-1. Rain rate statistics for June, 1977 50

Figure 2.7-2. Attenuation statistics for June, 1977 51

Figure 2.8-1. Rain rate statistics for July, 1977 60

Figure 2.8-2. Attenuation statistics for July, 1977 61

Figure 2.9-1. Rain rate statistics for August, 1977 70

Figure 2.9-2. Attenuation statistics for August, 1977 71

Figure 2.10-1. Rain rate statistics for September, 1977 81

Figure 2.10-2. Attenuation statistics for September, 1977 82

Figure 2.11-1. Rain rate statistics for October, 1977 91

Figure 2.11-2. Attenuation statistics for October, 1977 92

Figure 2.12-1. Rain rate statistics for November, 1977 100

Figure 2.12-2. Attenuation statistics for November, 1977 101

Figure 2.13-1. Rain rate statistics for December, 1977 108

Figure 2.13-2. Attenuation statistics for December, 1977. Data for11.7 GHz were invalidated by spacecraft maneuvers. 109

Page

Figure 2.14-1.

Figure 2.14-2.

Figure 2.15-1.

Figure 2.15-2.

Figure 2.16-1.

Figure 2.16-2.

Figure 3.2-1.

Figure .3.2-2.

Figure 3.3-1.

Figure 3.3-2.

Figure 3.4-1.

Figure 3.4-2.

Figure 3.5-1.

Figure 3.5-2.

Figure 3.6-1.

Figure 3.6-2.

Figure 3.7-1.

Figure 3.7-2.

Figure 3.8-1.

Figure 3.8-2.

Rain rate statistics for January, 1978 118

Attenuation statistics for January, 1978 119

Rain rate statistics for February, 1978 129

Attenuation statistics for February, 1978 130

Rain rate statistics for March, 1978 137

Attenuation statistics for March, 1978 138

Rain rate statistics for the calendar/year 1977less February.

Attenuation .statistics for the calendar year 1977.less February

147

148

Rain rate statistics for June 1977 through March1978 153

Attenuation statistics for June 1977 through March1978 154

Rain rate statistics for July, August, andSeptember, 1977 159

Attenuation statistics for July, August, andSeptember, 1977 160

Rain rate statistics for October, November, andDecember, 1977.

Attenuation statistics for October, November, andDecember, 1977

Rain rate statistics for January, February, andMarch, 1978

165

166

170

Attenuation statistics for January, February,and March 1978 171

Rain rate statistics for July through November, 1977. 175

Attenuation statistics for July throughNovember, 1977 176

Rain rate statistics for July, August, September,October, and December, 1977 181

Attenuation statistics for July, August, September,October, and December, 1977 •. 182

1. INTRODUCTION

1.1 Description of the Report

This report summarizes the precipitation attenuation and depolari-

zation data collected by VPI&SU from December 1, 1976, through March 31,

1978, on satellite downlinks operating at 11.7, 19.04, and 28.56 GHz.

This was the data collection portion of the period for which the

experiment received funds from the Defense Communications Agency (DCA),

and the report is submitted to fulfill our contractual requirement of

a final data report for DCA.

1.2 Guide to Related Literature

In this report the data are presented without extensive comment.

For a theoretical discussion of the phenomena involved, a comparison

of theory with experiment, and a computer model for predicting

attenuation and depolarization, the reader should consult

R. R. Persinger, "Millimeter Wave Propagation Modeling

of Inhbmogeneous Rain Media for Satellite Communications

Systems, Report 1978-1, NASA Contract NAS5-22577,

VPI&SU, Blacksburg, Virginia, May 1, 1978.

A detailed description of the hardware aspects of the experiment

is given by

- 2 -

C. W. Bostian et^ a_l_, "Quarterly Technical Progress

Report I on A Depolarization and Attenuation Experi-

ment Using the COMSTAR and CTS Satellites," NASA

Contract NAS5-22577, VPI&SU, Blacksburg, Virginia,

December 22, 1976.

For an explanation of the statistical data reduction techniques

used to prepare this report the reader should see

C. W. Bostian et, al_, "Final Report (Second Year of

Work) on a Depolarization and Attenuation Experiment

Using the COMSTAR and CTS Satellites," NASA Contract

NAS5-22577, VPI&SU, Blacksburg, Virginia, February 9,

1978.

1.3 Discussion of the Report Contents

DCA funding was formally transferred by NASA to VPI&SU at the end

of September, 1976, to pay for the construction of COMSTAR-19.04 and

28.56 GHz terminals. At that time the University was already operating

an 11.7 GHz attenuation and depolarization experiment for NASA-using

CTS.

When DCA funds were received CTS was turned off for the eclipse

period, and when spacecraft operations resumed the VPI&SU receiver was

found to be damaged by a water leak in the parametric amplifier

housing. Operations were resumed on a temporary basis in November,

1976; December, 1976, was the first full month of data collection

following eclipse and it is therefore the first month for which data

- 3 -

are presented in this report. With NASA's permission we ceased

operations during February, 1977, to make permanent repairs to the

CIS equipment, and hence no data appear for that month.

The COMSTAR D-2 28 GHz downlink became operational in April,

1977, and data appear here for that system beginning with the month

of May, 1977. Attenuation data for the D-2 19 GHz system became

available in May, 1977, and data collected at this frequency appear

in the report beginning with June, 1977. For the period in which we

have CTS data but not COMSTAR data this report provides estimates

of what the COMSTAR attenuation statistics would have been. These

were derived by multiplying the 11.7 GHz attenuation in dB by 1.48 to

approximate the 19.04 GHz attenuation and by 2.71 to approximate the

28 GHz attenuation. The 1.48 and 2.71 attenuation ratios were

obtained from measured attenuation data taken during the summer of

1977.'

Chapter 2 of this report is devoted to monthly results and

Chapter 3 considers data from longer periods of time. For each time

period reported the following tables appear.

Table 1. Key Parameters summarizes the rain and signal behavior

for the month. It gives the total rain accumulation, the peak rain

rate, and the percent of the total rain accumulation that fell at

10, 20, 30, 40, and 50 mm/hr. Also presented are the monthly mean

signal levels at IF; these will give the reader an idea of the overall

stability of the satellite beacon transmitters and the receiver gains

from one month to the next. • Where available we have also presented

- 5 -

agree closely with theoretical predictions. Power curves, on the

other hand, can give similar results fo'r widely differing coefficients.

For this reason our a and b coefficients in the table frequently depart

from theory while the attenuation : rainrate relationship that they

describe agrees well with theory.

Also included in each monthly group are percentage-of-time plots

of the attenuation and rain rate data contained in the table.

NOT

- 6 -

2. MONTHLY DATA

This chapter summarizes the data collected on a month-by-month basis.

Below is a brief commentary on each month which appears; in it appear

the total hours of rainfall* during the month and the percentage of these

hours during which attenuation and isolation data were collected. In

reading these figures the reader should keep in mind several factors.

(1) Unless otherwise noted, attenuation measurements were made during

all periods of heavy rain when the receivers could maintain phase lock.

Small departures from 100% for attenuation measurement times generally

represent intentional interruptions during light rain for equipment

checks, etc. (2) Cross-polarized signal components are almost always

at least 10 dB below the corresponding co-polarized signal components,

and this means that during severe fades the cross-polarized components

will be corrupted by noise first. Thus isolation data will normally

be available for a slightly smaller percentage of time than is attenuation

data taken over the same time period. (3) For statistical purposes

missed attenuation data can be filled in by frequency scaling.

December, 1976. (Section 2.1) Rain fell for 18 hours, but the

rain rate was insignificant and no rain rate plots are given. CTS

attenuation and isolation data were collected for 100 and 99.9% of the

time. Attenuation values for 19 and 28 GHz were scaled.

January, 1977. (Section 2.2) During this month the rain rate

was negligible and no rain rate plots appear. Very light rain fell for

* Rainfall is arbitrarily defined as existing when the rain rate exceeds0.5 mm/hr.

- 7 -

a total of 9 hours, and CIS isolation and attenuation data were collected

for 98% of this time. Attenuation values for 19 and 28 GHz were scaled.

February, 1977. (Section 2.3) No data were collected; the VPI&SU

earth station was closed down for repairs.

March, 1977. (Section 2.4) Rain fell for 14 hours. CIS attenuation

and isolation data were collected for 75.4 and 75.2% of time time,

respectively. Attenuation values for 19 and 28 GHz were scaled.

April, 1977. (Section 2.5) There were 27 hours of rain in

April. Attenuation measurements were made for 87.0% of this time and

isolation data for 86.5%.

May, 1977. (Section 2.6) This was the first full month of 28 GHz

data collection. Rain fell for a total of 9 hours, and attenuation data

were collected for 93.6% of time time at 11.7 GHz and 87.1% of this time

at 28 GHz. The corresponding firugres for isolation were 92.6% and 77.4%;

problems were encountered with 28 GHz depolarization data because of an

antenna problem which affected the cross-polarized channel.

June, 1977. (Section 2.7) We recorded 23 hours of rainfall and

collected 11.7 GHz attenuation and isolation data for 99.3% and 98.4%

of time time. At 28 GHz attenuation and isolation data were taken for

95.1% and 30.4% of the rain time. Continuing antenna problems were

responsible for the low isolation percentage. The 19 GHz system became

operational during June and collected attenuation data for 88.9% of the

rain time.

July, 1977. (Section 2.8) This was the first full month of 19 GHz

operational and during 4 hours of rain 19 GHz attenuation and isolation

data were collected 89.3% and 78.4% of the time. The corresponding

- 8 -/

figures for the 11.7 GHz system were 91.7% and 89%. At 28 GHz attenuation

data were collected during 87% of the rain time. Isolation data at

this frequency were invalidated by the continuing antenna defect which

was located and repaired near the end of the month.

August, 1977. (Section 2.9) Rain fell for six hours and attenuation

data were recorded for 96.2% of this time at 19 GHz and 73.2% of this

time at 28 GHz. For isolation the corresponding figures were 77.2%

and 63.3% respectively. The 11.7 antenna positioner malfunctioned and

limited attenuation and isolation data collection to 38.2% and 38.0% of

the rain time; missing attenuation data were filled in by scaling.

September, 1977. (Section 2.10) September brought 17 hours of

rain. Attenuation data were collected for 94.2% of this time at 11 GHz,

for 100% of this time at 19 GHz, and for 97.9% of this time at 28 GHz;

the isolation figures were 93.9% (11.7 GHz), 97.9% (28 GHz), 12.3% (19 GHz

vertical), and 99.2% (19 GHz horizontal). During this period the CIS

spacecraft was shut down every day for eclipse; this biased the isolation

data but its effects were removed from the attenuation records.

October, 1977. (Section 2.11) It rained for 15 hours and attenuation

data were collected for 94.0% (11.7 GHz), 100% (19 GHz), and 94.5

(28 GHz) of this time. The isolation values were 90.9% (11.7 GHz, 95.8%

(19 GHz), and 93.8% (28 GHz).

November, 1977. (Section 2.12) A total of 25 hours of rain were

recorded. The experiment collected attenuation data for 73.4% (11.7 GHz),

85.6% (28 GHz), and 85.3% (19 GHz) of this time. The percentages for

isolation were 70.8% (11.7 GHz), 85.5% (28 GHz), and 83.8% (19 GHz).

Occasional local oscillator malfunction may have biased the 19 GHz data,

however.

- 9 -

December, 1977. (Section 2.13) December was a period during which

repeated CIS spacecraft maneuvers were conducted. We were not provided

timely tracking information and were able to collect 11.7 GHz attenuation

.and isolation for'65.3% and 65% of the 14 hours of rainfall. At 28 GHz

the attenuation percentage was 100% and the value for isolation was 99.1%.

The 19 GHz system was disabled by a local oscillator failure and operated

only during 38.2% of the rain time for attenuation and 36.5% for isolation.

January, 1978. (Section 2.14) This month and the two months following

were marked by heavy falls of snow, sleet, and freezing rain. Data

collected during known periods of antenna contamination were deleted

from the data.base. Under weather conditions like those experienced,

tipping bucket rain gauges tend to freeze, fil\ up with ice and snow,

and then send out false indications of rainfall when rising temperatures

melt the gauge contents. For this reason, the rain data quoted for

January, February, and March, 1978, must be treated with caution.

During January, the gauges reported 53 hours of rainfall for which we

collected valid attenuation data 78.6% (11.7 GHz), 56.9 (19 GHz) and

56.8% (28 GHz) of the time. The corresponding isolation percentages

are 78.1% (11.7 GHz), 48.7% (19 GHz) and 55.8% (28 GHz). It should be

emphasized that during these winter months we noted occasional instances

of severe attenuation and depolarization from sleet and snow while the

antennas were clear and no precipitation was being observed on the ground.

February, 1978. (Section 2.15) Our gauges indicated rain for

5 hours, but they were probably measuring melting snow. Attenuation data

for 11.7 GHz may have been influenced by periodic shutdowns of the

spacecraft.

- 10 -

(March, 1978. (Section 2.16) Snow and rain were mixed during this

month, and snow filling the antennas was a recurrent problem. Our

gauges recorded 33 hours of rainfall, some of which was melting snow.

Attenuation data were collected for 62.3% (11.7 GHz), 20.9% (19 GHz),

and 52.7% (28 GHz) of the time that the guages indicated rain.

Corresponding figures for isolation were 61.9% (11.7 GHz), 18.9% (19 GHz),

and 52.7% (28 GHz).

- 11 -

2.1 December. 1976

Rainfall was insignificant and no rain rate plots are given. 19

and 28 GHz attenuation are scaled. There was insufficient data from

which to develop regression equation.

- 12 -

Table 2.1-1.


1. Rain Data

VPI&SU Accumulation, 39.83 mm

USWS Accumulation, 72.90 mm

Peak VPI&SU Rate, 12.53 mm/hr

Percent of monthly accumulation at

R > 10 mm/hr, 2.29% R > 20 mm/hr, 0%

R > 30 mm/hr, 0% R > 40 mm/hr, 0%

R > 50 mm/hr, 0%

Channel

11.7

19.04V

19.04H

28.56

Monthly MeanCo Signal, dBM

-82.25

2. Signal Data

Maximum Fade,dB

9.65'

Minimum IsolationWhile in Phaselock, dB

20.88

- 13 -

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RAIN ACTS

01*

23•

456789

1011

12

AV19

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49

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5 16.405L 14.52?

7.259I 7.198»• 3.693

2.2741.1900.9030.6720..4S50.395O.2310.1080.0570.0270.0210.0150.0110.0060.003

L 0.002> 0.000

Table 2.1-2. Attenuation and rain ratepercent-of-time data forDecember, 1976.

- 15 -

2.2 January, 1977

Rainfall was insignificant and no rain rate plots are given. 19

and 28 GHz attenuation are scaled. The low attenuation recorded did

not justify regression equation.

- 16 -

Table 2.2-1.

Key parameters for the month of January, 1977.

1. Rain Datai





R > 10 mm/hr, 0% R > 20 mm/hr, 0% R > 50 mm/hr, 0%

R > 30 mm/hr, 0% R > 40 mm/hr, 0%

2. Signal Data

Channel Monthly Mean Maximum Fade, Minimum IsolationCo Signal, dBM dB While in Phaselock, dB

11.7 -82.90 3.39 28.9

19.04V .

19.04H

28.56 - '

- 17 -

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- 18 -

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Table'2.2-2. Attenuation and rain ratepercent-of-time data forJanuary, 1977.

- 19 -

2.3 February. 1977

No data were collected; our station was shut down for repairs.

- 21 -

Table 2.4-1. '

Key parameters for the month of March, 1977.

1. Rain Data





R > 10 mm/hr, 31.42% R > 20 mm/hr, 19.00%

R > 30 mm/hr, ill..21% R > 40 mm/hr, 7.16%

\R > 50 mm/hr, 2.38%

Channel

11.7

19.04V

19.04H

28.56

Monthly MeanCo Signal, dBm

-80.14

2. Signal Data

Maximum Fade,.dB

10.89

Minimum IsolationWhile in Phase!ock, dB

21.28

- 22 -

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Table 2.4-2. Attenuation and rain ratepercent-of-time data forMarch, 1977. (Values for19 and 28 GHz are estimatedfrom 11 GHz data.)

- 25 -

A V I V

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Table 2.4-2 (continued). Attenuation and rain ratepercent-of-time data forMarch, 1977. (Values for19 and 28 GHz are estimatedfrom 11 GHz data.)

- 26 - ORIGINAL PAGE IbOF POOR QUALITY

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- 28 -

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- 29 -

2.5 April, 1977

19 and 28 GHz attenuations are scaled.

- 30 -

Table 2.5-1.

Key parameters for the month of April, 1977.

1. Rain Data





R > 10 mm/hr, 19.5% R > 20 mm/hr, 7.20%

R > 30 mm/hr, 4.03% R > 40 mm/hr, 2.22%'

R > 50 mm/hr, 1.21:

Channel

11.7

19.04V

19.04H

28.56

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-79.86

2. Signal Data

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- 37 -

2.6 May, 1977

19 GHz attenuation values are scaled. 28 GHz isolation data are

suspect because of an antenna defect.

- 38 -

Table 2.6-1.

Key parameters for the month of May, 1977.

1. Rain Data



Peak VPI&S.U Rate, 133.90 mm/hr


R > 10 mm/hr, 60.00% R > 20 mm/hr, 42.27% R > 50 mm/hr, 13.08

R > 30 mm/hr, 30.18% R > 40 mm/hr, 19.14%

2. Signal Data


16.6711.7

19.04V

19.04H

28.56

-80.20

-81.04

-84.01

-85.96

30.11

44;56(s)

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Table 2.6-2 (continued). Attenuation and rain ratepercent-of-time data forMay, 1977.Note: 19 GHz points arescaled.

- 43 -

ACTS49

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May, 7977.Note: ]g'cu,scaled. 2 P07nts are


- 44 -

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- 48 -

2.7 June, 1977

28 GHz isolation data are suspect because of an antenna defect.

- 49 -

Table 2.7-1.

Key parameters for the month of June, 1977.

1. Rain Data





R > 10 mm/hr, 41.92% R > 20 mm/hr, 31.40% R > 50 mm/hr, 14.46%

R > 30 mm/hr, 24.77% R > 40 mm/hr, 18.95%

2. Signal Data

Channel Monthly Mean Maximum Fade, Minimum IsolationCo Signal, dBm dB While in Phaselock, dB

17.6711.7

19.04V

IQ ndn1 3 • y^Tll

28.56

-79.59

-83.39

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Table 2.7-2. Attenuation and rain ratepercent-of-time data forJune, 1977.

- 53 - ORIGINAL PAGE ISOF POOR QUALITY

RAIN

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Table 2.7-2 (continued). Attenuation and rain ratepercent-of-time data for

r June, 1977.

-54 -'

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Table 2.7-3 (continued). Percentage of time that 11.7 GHz isolationwas less than the indicated value forJune, 1977.

- 57 -

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- 58 - '

2.8 July. 1977

All data collected are valid.

- 59 -

Table 2.8-1.

Key parameters for the month of July, 1977.

1. Rain Data





R > 10 mm/hr, 71.65% R > 20 mm/hr, 69.14%

R > 30 mm/hr, 67.77% R > 40 mm/hr, 64.61%

R > 50 mm/hr, 56.20%

Channel Monthly MeanCo Signal, dBM

2. Signal Data

Maximum Fade,dB

11.7

19.04V

19.04H

28.56

-81.69

-85.96

-86.92

-81.70

' 50

57.26

57.26

114.52


' 11.07

**

* System was not yet in operation.

** Antenna problems invalidated data.

- 60 -

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Table 2.8-2. Attenuation and rain ratepercent-of-time data forJuly, 1977.


RAIN

373839

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Table 2.8-2 (continued), Attenuation and rain ratepercent-of-time data forJuly, 1977.

- 64 -


ICTS PtRCENT

11.0711.28

11.6b999li.6712.07

12.S099912.^8

" 13.07"13.07999

13.2815. *8

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16.

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19.27VVV19.̂ 619. 6d19.88

20.68

21.07VV921.C3GC1

21. od21. aa

21.8BCC121.8900122.07999Z2. 27999• 22.̂ -6

22.0822.8899923.0799925.C8001

0.0010.002

O.GOoG.OO?O.CitoO.OilU.020Q.0210.022

0.0260.028O.C31

0.03^

0.037G.043

O.G^ti0.0500.051C»0^:J0.0330*030O.GouO.Obc*G.088C.U890.09i0.0930.091G.C9C0.100C.IG9C.11C0.127

0.136

0.131U.1330.1370.638

Ci.663C.93'60.936

Table 2.8-3. Percentage of time that 11.7 GHz isolationwas less than the indicated value forJuly, 1977.

- 65 -

ICTS23.47999

:. 23.*»-823.68999

23.8823.8899924.27999

24.632**. 6899923.0799923.0899923.27999

23.28•»-•-•-> 25.2923.41999

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26.1)926.27999

2o.2Bf 26.29

2fc»od26.6o99'3)

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27.0927.27999

27.2927.9627. *9

27.6899927.09001

27.a899927.8900128.07999

2&.. 0928.27999

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28.89U0129*07999

• • 29..C9

1.067

l.lOo1.1931.22o

1.3231.325

2.197

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2. -+66

3.0^93.1983.199

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3.122

5.6373.£33i.VOo

6.43̂6.3307.1217.13'17.132

7.8376.313B..369

88.6669.3829.6011G.34S1G.78&10.9G9

OF POOR

Table 2.8-3 (continued). Percentage of time that 11.7 GHz isolationwas less than the indicated value forJuly, 1977.

- 66 -

IcTS229.H-9

29 .

- 67 -

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- 68 -

2.9 August, 1977

All data collected are valid. 11.7 GHz attenuation values for

the last half of the month were scaled; a pedestal malfunction kept

these from being recorded.

- 69 -

Table 2.9-1.

Key parameters for the month of August, 1977.

1. Rain Data





R > 10 mm/hr, 74.21% ; R > 20 mm/hr, 64.46% R > 50 mm/hr, 38.77%

R > 30 mm/hr, 54.18% R > 40 mm/hr, 48.51%

2. Signal Data


17.68

6.11

11.91

11.7

19.04V

19.04H

28.56

80.18

85.74

86.87

83.04

13.53

36.59

30.44

73.18

- 70 -

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- 72 -

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Table 2.9-2. Attenuation and rain ratepercent-of-time data forAugust, 1977.

- 73 -

ORIGINAL PAGE ISOF POOS QUALITY

RAIN AC1

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28.;£;: ,2.9•---30 • - • • • ":%' 31 •• •n'.-32 - . ' • • • •

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" 0.0150.0130.012G.OilC.OiO0.009c.coa0.007O.OC60.0040.0030.002

Table 2.9-2 (continued). Attenuation and rain ratepercent-of-time data forAugust, 1977.

- 74 -

RAIN

112121

ACTS

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Table 2.9-2 (continued). Attenuation and rain ratepercent-of-time data forAugust, 1977.

- 75 -

OF POOR

ICTS PtKCtNl

17.6818.27999

18.4-819.0/999

. 19.aa- 2G.6821.0799921.08 Coil

22.079V922.27999V'.-=.-:22»2-b':.»-. '..-22* 6822.69GOI23.G7999

23.b9C01

2̂ .889992>.29

25.0899̂

20.&9Q0126.88

27.0799927.0927.29

•••.-'27.*»•»27.̂ 9

27.6827.6̂ 99927.69CG127.8S99927.8900128.G7999

23.08999.->- 28.09- 28.26

0.002G.G05G.G090.0120.0190.031O.G330.036G*G3o

0.0^3O..C50Q.G550.0620. 07 i0.078G.GblG.G63O.G9O0.092O.G95

U.llH-C.11&

G.121

G.12d0.13G0.2660.2 "i 0Cy.2V7U.3S60.389

0.913

2.0722.073

3.7605>.08c6.9**Z

10.77^

16.173

Table 2.9-3. Percentage of time that 11.7 GHz isolationwas less than the indicated value forAugust, 1977.

- 76 -

1CTS - - ":': v 2 «. 2 9,->A:;̂ 8..̂ j.-.^.•28.4928.4900128.689992«. 09001

"~,T 28.8828.88OU128.88999-

PERCENT

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31.131.29

31.2999931.30C01

31.

- 77 -

1CTS PtRCtNl. 32.29 75.olo32.2*999 . 76.638

32.49C01 77.8ra3̂ .49999 77.8b632.69001 : 78.137

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33.1 .••'&C.6501 33.29 82.CV*

J3.^9 S2.26733.%900i i>2.30>33.49999 , . ; ^2

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- 79 -

2.10 September. 1977

11.7 GHz attenuation data may have been influenced slightly by

daily spacecraft shutdowns for eclipse. Where possible these were

ignored in the statistical calculations. For the same reason the

IT.7 GHz isolation data are questionable.

- 80 -

Table 2.10-1.

Key parameters for the month of September, 1977.

1. Rain Data





R > 10 mm/hr, 32.20% R > 20 mm/hr, 25.58% R > 50 mm/hr, 6.75%

R > 30 mm/hr, 19.97% R > 40 mm/hr, 12.39%

2. Signal Data

Channel Monthly Mean Maximum Fade, Minimum IsolationCo Signal, dBm dB While in Phaselock, dB

14.48

22.52

15.51

11.7

19.04V

19.04H

28.56

-81.63

-85.42

-87.01

-81.51

15.38

25.41

24.59

50.81

- 81 -

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Table 2.10-2. Attenuation and rain ratepercent-of-time data forSeptember, 1977.

- 84 -ORIGINAL PAGE IS

POOR QUALITY!

RAIN

14

1920

2223

ACTS

10'•. »,-. »

.' •11

r-25-,263031,32333536

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Table 2.10-2 (continued). Attenuation and rain ratepercent-of-time data forSeptember, 1977.

- 85 -

14.47999/ 15.27999

2J.0799923.26

23.47999

21-. 0924.27999

PERCENT

. p17.2*999 r

. IV ? Vi O* A * • 4- O r>18.07999 r

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21.26 -"21.47999

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Table 2.10-3. Percentage of time that 11.7 GHzisolation was less than theindicated value for September,1977.

- 86 -

1CTS2a.2a25.«i9

. • - • • 25..-«-8..-•:• • 25.4*

25.65251.08999•"--- 25.8625.8399926.0800126.08999/ 26.092fc. 27999sv--

: 26.28

-^ 26.49••-.- 26.6-8 '

^•T 26. a a *99-26.6900127.07999

S 27.G80C127.27999

i 27. 2d':,V~ 27.29

4.337

4.716*«•. 7434.851

4.91o4*.996

7.8978.07^.

20.825

20.990411.324

21.653.21.77^32.07933.4t>d3^.813


27.^900 127. 6d

' : ^ , - 27. 8 d': 27.86001

27. d 8 99 9: 28.07999

28.09\ 28.27999

•i 28.28

- 28. *62to.^9

28.4900128. od

28.8828.88999

•28.8900129.0799929.0&V99

29.09- 29.28

- 29.29

29.49

3t>.o:>736.967

36.57639.^0039.-t6^40.34o^1.577*»2.af&1-2.435

44.7^945.995

•^6.833

48.38549. /6-/

Table 2.10-3 (continued). Percentage of time that 11.7 GHzisolation was less than theindicated value for September,1977.

- 87 -

•ICTS . - '• ' • : ' •29.0c»999_29.69001 - . -,29.88999 31.89729.89U01 .-3^.6^-230.08999 34.68-*

,*:,- 30.09-

c^ w »*»** * * * i * » • - . « «>30.69001 . 53.622^30.69999 ^i?-6*130.88999 :>i>*7I:)iC.69001 36.527

• :fc----3l.09 • - - : 37..-̂ /5• '̂- 3ll29; 57.79831.29999 57.883

-"•-—- 31.49 - ' 38.25231.^9001 ii8*3^431.49999 58.69031.00999 II'^J-3i.69001 39..S6-231.88999 3?,-2^^31.89001 "•^•?2«;:32.08999 Ou.u9d

sv. i , 32.09 oQ.517-ii£: 32.1 6C.640

r-?:-.-:J2.zy ' . 0}-!£a32.29999 ; 6i»7l2

- 62.909321^9999 *|»9U32.08999 . 63-^5^33.^89

•' •-• ' -. 33.1 65.82j-"---33.29 -o7.*S533.29999 6?.^tiO33.30001 67.^-87... \i3.^9. 68.^8933.49O01 ^**^-?1^33.50001 08.95133.68999 ^2***^?33.69001 . ^•28,3

- 33.7 ^k"^3o33.88999 -I«*iC"233.890O1 .t9-^ii-'

33.9 ^-5?9- ' •- ' " -'34-.09- Z^.oOo

TabU Z.,0-3 (continued), ^-entage^f tj« ttjt 11.7 GHz

indicated value for September,.1977.

- 88 -

COD:

N

VOLT)

COCM

cn

s-OJ

CU4->CLcuto

O

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cr

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03 -r-

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- 89 -

2.11 October, 1977

All attenuation data are valid.

-90 -

Table 2.11-1.

Key parameters for the month of October, 1977.

1. Rain Data





R > 10 mm/hr, 33.73% R > 20 mm/hr, 21.74%

R > 30 mm/hr, 15.00% R > 40 mm/hr, 12.04%

R > 50 mm/hr, 7.53%

.Channel

11.7

19.04V

19.04H

28.56

Monthly Mean

Co Signal, dBM

-81.90

-87.71

-88.57

-85.24

2. Signal Data

Maximum Fade,

dB

27.08

28.08

Minimum Isolation

While in Phaselock, dB

19.88

7.91

36.16 17.72

- 91 -

I —O7>r- 1

o:LUOQ

S , o °CD

- 92 -

M31CI3

px.

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RAIN ACTS

0»

1*2»

3*4

:/5:i.

•:-.

. 6

.- • 7»'

89

id

ii12

•'1314. ••

15

16

1819

; 20

2123

a- 25,V: -'. "26

28

AV19 AC28

"' 6 ' •."" '•" ' .-o' » • ' " ' • • •

i . . • '-. - ... • • i2 .' \- . .

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29-

m-•3*••*•- •»4»• •

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5• . . . »

6• ' '• .

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10

f11

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13*

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14-15

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16- . •

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17•

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"16.52914.3549.2596.0015.1063.8242.4491.8631.5051.2270.9750.6770.5420.3860.3790.3490.3330.2740.2250.1950.1810.1630.1300.1280.1140.1030.0970.091 '0.0850.083

- . 0.0810.0300.0780.0760.0730.0670.0620.0570.0540.0530.0470.0450.0440.0430.0410.0400.0330.0360.0350.0320.0300.0290.0230.027

Table 2.11-2. Attenuation and rain ratepercent-of-time data forOctober, 1977.


RAIN

293031363739

•>

4245

»

4748495559606171757779

ACTS

1027

A VI9

" " »•

.". 6.;-• -

7

ia

11121314161713

AC28

18

19

20

21

222324252628323436

PER

0.0260.0250.0240.0220.0210.0190.0180.0170.0160.0150.0130.0120.0110.0100.0090.0080.0070.0060.0040.0030.0020.001o.ooo

Table 2.11-2 (continued). Attenuation and rain ratepercent-of-time data forOctober, 1977.

- 95 -

ICTS ; PERCENT

•19.88 0*002,21.48 0.00422.09 , 0.006

22.27999 0.00323.29 0.010

23.89001 0.01224.49 0.014

24.63999 0.01625.29 0.018

-^; 26.09 -• 0.02426.27999 0.037;

26.29 0.03926,47999 0.303

26.49 0.30926.49001 0.42526.83999 0.43326.89001 0.44927.08999 0.512

27.09 0.51827.27999 0.520

27.29 1.02227.49001 1.02427.68999 1.10927.69001 1.24327.88999 1.25327.89001 1.274.28.08001 1.27328.08999 „ 1.456

28.09 1.46328.28 1.67228.29 1.67423.48 2.01728.49 2.468

28.49001 2.48828.6899V 2.53528.69001 2.543

28.88 2.56028.88999 2.94326.69001 2.95029.08999 2.952

29.09 2.97629.29 3.91029.49 4.315

29.49001 4.41429.68999 6.75029.69001 6.76229.88999 6.76629.89001 7.55130.08999 7.593

30.09 7.6C130.29 9.551

- 30.49 11.05730.49999 11.865

Table 2.11-3. Percentage of time that 11.7 GHz isolationwas less than the indicated value forOctober, 1977.

- 96 -


ICTS30,6399930.6900130.8900131.08999

31.0931.29

31.2999931.49

31.6899931.88999^31.8900132.08999

32.0V32.1

32.2932 .49

32.4999932.6399932.69001

32.732.8899932.89001

32.933.08999

33.0933.29

33.2999933 .49

33.490C133.5000133.6899933.6900133.69999

33.7'33.8899933.89001

33.934-.0934.1

34.1000134.29

34.3000134.49

34.4900134.499993,4.6899934.6900134.8399934.89001

34.9" -•'- 35 . 09

35.135.29

35.2999935.3UOU1

PERCENT12.64313.49214.15714.71116.70217.17117.49618.15619.57220.18821.29921.30721.83722.75523.06624.45325.35525.61326.09527.82623.19328.92929.71729.76230.67633.23933.90534.02534.97635.38638.1234O.25341.60641.67841.71442.90342.95343.74743.94444.21746.95347.11143.85251.60352.57052.72454.14054.29254.80055.41456.82956.90559.72460.64060.695

Table 2.11-3 (continued). Percentage of time that 11,7 GHz isolationwas less than the indicated value forOctober, 1977.

- 97 -

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- 98 -

2.12 November. 1977

19 GHz data are questionable because of an intermittent failure in

the local oscillator.

- 99 -

Table 2.12-1.

Key parameters for the month of November, 1977.

1. Rain Data





R > 10 mm/hr, 2637% R > 20 mm/hr, 8.69% R > 50 mm/hr, 3.66%

R > 30 mm/hr, 4.49% R > 40 mm/hr, 3.66%

2. Signal Data


11.87

8.91

18.72

11.7

19.04V

19 04H1 3 • V/~l 1

28.56

-81.31

-86.37

-89 20\J3 • L-\J

-83.65

30.96

26.60

32.78

- 100 -

i —CDC3CO

CQSIUJ

O«=co£

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- 101 -

CD* n

M M M OC.=z= rc zn ujCD CD CD CQ

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RAIN ACTS

•

- 103 -

RAIN

1617

:'Vl819-2021

-2223

ACTS AV19

25.:1262?29

3 13338526166SO85

8

911131720212430

2526

AC28

16

17•

13»

19

20

212225273132

PER

0.0490.0430.0420.0350.0340.0280.0260.0250.0230.0210*0200.0160.0140.0120.0110.0100.0090.0080.0070.0060.0050.0030.0020.0010.000

Table 2.12-2 (continued). Attenuation and rain ratepercent-of-time data forNovember, 1977.

- 104 -PAGEJS

POOR QUALITY

I GTS

11.8712.2712.6716.0717.4821.2322.6822. 3d

23.07999^23.6823.6824-.2924.6825.2925.48

25.8900126.0926.68

^26.89001 ;27.48 l27.49!

27.4900127.6899927.69001

27.8828.2928.49

28.6899929.0899V

29.0929.2929 . 49

29.4900129.6899929.3900130.G8999

30.0930.2930.49

30.4900130.6899930.6900130.8899930.8900131.08999

31.0931.29

31.2999931.49

31.6899931.6900131.889993-1.89001

PERCENT

0.0030.0060.0090.0120.0140.0170.0200.0290.0330.0840.1100.1650.3610.4500.4940.5170.5570.6060.6470.6550.6750.6780.7420.7710.8921.0131.1571.6571.6601.6971.9652.1732.1762.2142.4452.4472.9122.0973.3393.3634.4825.0485.0515.5305.6026.9829.2799.288

10.96711.00212.45413.08615.554

Table 2.12-3. Percentage of time that 11.7 GHz isolationwas less than the indicated value forNovember, 1977.

- 105 -

CM

tvl

CD

LO

COCM

en

a)

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c:o

s-o

toco-M(O

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(Ua:

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N

CD

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- 106 -

2.13 December. 1977

11.7 GHz data were invalidated by repeated spacecraft maneuvers

for which we were not provided timely tracking information.

- 107 -

Table 2.13-1.


1. Rain Data





R > 10 mm/hr, 2.35% R > 20 mm/hr, 0% R > 50 mm/hr, 0%

R > 30 mm/hr, 0% R > 40 mm/hr, 0%

2. Signal Data


10.27*

5.11

11.7

19.04V

19.04H

28.56

-81.74

-87.57

-92.74

-83.67

43.31*

5.37

8.14

29.05 15.11

* Data were invalidated by spacecraft maneuvers.

- 108 -

en

a;LUCQs:LiJO

c/ooo

CJooPQ

CO

XUJ

4- oo

oe:

f—«=c

- 109 -

M N Nzn 3: IEt n t j~i t n

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a o

LUCO2LLIOLU

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CVJI

OO

C\J

0)

3cn

- no - ORIGINAL PAGE ISOF POOR QUALITY

ACTS AV19 AC28 PER

ijlV.p'

;;:)';. 2.

6

7

910

11

1213

1516

5

7

i^.jg-v,:.123

: »' - . 4.." • '

5' -...

6,7», -a

.. • *. . -9

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• .11

».»-»

12

13...

14..-••,

15».» -

16,

17»• -^,

18.,.. -.

19202122

»2324. ,25.

25.51918.74314.84311.72211.2699.3837.546

, 6.4695.7084.9364.2403.075

.2 .906i 2.259^2.084

1.6951.5321 .4271.3211.2651.2251.1231.1060.9880.7740 .7400.6620.6220.612

--' 0.5990.4820 .45 20.4300.4110.3370.3310.2730.2420.2410.2350.2340.2320.2210.2030.1980.1780.1520.1200.0890.0870.0690.0510.0410.037

Table 2.13-2. Attenuation and rain ratepercent-of-time data forDecember, 1977. Data for11.7 GHz were invalidatedby spacecraft maneuvers.

- Ill -

RAIN

' 81015

ACTS

33

43

AV19 AC28 PER

2627

2829' • *

»

31

0.0290.0170.0140.0120.0100.0090.0020.000

Table 2.13-2 (continued). Attenuation and rain ratepercent-of-time data forDecember, 1977. Data for11.7 GHz were invalidatedby spacecraft maneuvers.

- 112 -

ICTS

1313

20= 20

•l'?P22

,,23

232424

2425

•-2525

•."•"•- .

2526

.26

26

262627

2727272728

• ' ' ~-?*z10.2710.8712.2712.67.47001.8699914.07

-.4699914.8715.27

;• 15.6716.2717.0717.8718.0718.6719.28.07999.08001.6399921.68

.279990799923.4889001.27999.4900124.68".88959V;.07999 U.47999.49001 \25.88.88999.08999.2799926.29.6699926.88.asooi.88999.0899927.0927.2927. 4927.63.68999.69001.88999.89001.03999 "•-2a.0928.49

PERCENT

0.002•0.0040.0110.0120.1870.1890.2970.3010.371

iO.379r0.4790.5500.5870.6210.6230.6530.7290.7320.8050.8470.909O.9500.9531.1051.2041.2Q61.2491.6791.6SO1.7491.9282.0982.1792.2062.3033.2403.3823.4083.9974.0594.0684.2704.2774.6964.7675.2446.1116.2866.5206.9427.5387.6098.610

Table 2.13-3. Percentage of time that 11.7 GHz isolationwas less than the indicated value forDecember, 1977.

- 113 -


I CIS28.4900128.6899928.6900128.8899928.89001

29.0929.2929.49

29.4-9001.,29.6899929.6900129.8899929.89001

30.09:" 30.2930.49

30.4900130.6899930.6900130.8899930.89001

31.0931.2931.49

31.68999-.31.6900131.8899931.8900132.08999

32.0932.132.29

32.2999932 .49

32.4900132.6899932.6900132.8899932.39001

32.933.0933.133.2933.4V

33.4900133.4999933.6899933.6999933.8899933.89001

33 .934.0934.2934.49

34.68999

PERCENT8.7879.901

; 10.536: 10.64210.78211.25813.60015.186

: 15.430I 15.45715.56516.15616.81522.33025.92126.35426.83728.20428.40228.40432.12535.30035.84743.41743.80448.14548.63551.03551.C3653.30853.97359.15159.59461.05561.90763.02865.25065.55466.02166.19167.82269.27470.11271.74574.69374.76974.95775.93176.04376.678

! 77.18078.51031.46781.59181.814

Table 2.13-3 (continued). Percentage of time that 11.7 GHz isolationwas less than the indicated value forDecember, 1977.

- 114 -

PERCENT32.09 17.3832.1 17.392

. ' .§8:21120.711

32.68999 21.29702.69001 22.792, 32.88999 23.14732.89001 25.514-::. 32.9 25.517

-v.̂ .v33.09 26.769• ,J3.1 26.937

/: 33.29 28.974:--, 33.49 30.11133.49001 30.47233.50001 30.47533.63999 32.22433.69001 32.91733.83999 33.75433.89001 34.562

33.9 34.78134.09 36.09234.1 36.10634.29 37.636

- 34.49 38.61434.49001 38.62634.66999 42.31134.69001 43.789_ . 34.7 43.89634.88999 43.95134.89001 46.791

, 34.9 46.802*•••• 35.09 48.765

- -9 49.521

52.64735.50001 52.65035.68999 53.00235.09001 53.937,c n35.7 53.94035.89001 56.370

• :_, 3̂5. 9 56.39036.08999 56.485

36.09 58.370•̂ 36.1 . 58.39636.10C01 58.402-• |6.29 62.40836.29999 62.43936.30001 621465

36.49 62.65V36.49001 63.031-36.50001 63.034

Table 2 13-3 (continued). Percentage of time that 11.7 GHz isolationwas less than the indicated value forDecember, 1977.

- 115 -

I—r»~cr>

s_

O 03 0)tO 3 e—

crc~ CO >^O -M•i- -(-> -r-+J 03 i—n3 "̂ ~3^->J3c~ ^— rQCU r— ^34-> 04-> S-«=xO 03 CUtO 3 r—

CTC CU >,O -I-1•r- -t-> -i--M 03 i —03 -r-3 ^^* *"^c cn 03CU r— JD-i i ̂ ^^ e34-* t-=t «=C Q-

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enc tor^ 'ai03 i— >O (TJ CUto 3 • —

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03

03 C

C •

- 116 -

2.14 January. 1978

All data are valid. We

ntrs.nasa.gov...Data Report for December 1976 through March 1978 on A DEPOLARIZATION AND ATTENUATION...

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