Calculation Results for Aggregate System EPFD for the Thirteenth Resolution 609 (Rev. WRC-07) Consultation Meeting

1 Introduction

The purpose of this contribution is to provide and share the results of equivalent power flux density (epfd) calculations performed by the U.S. in preparation for the Thirteenth Resolution 609 Consultation Meeting (13th CM) to be held in Auckland, New Zealand, 6-8 September 2016. The following relevant materials are presented in this document:

An Executive Summary is presented in Section 2. The U.S. calculation of the maximum RNSS aggregate epfd, according to § 11 d) of the

CM Terms of Reference (MOD Geneva, September 2011) (ToR) is provided in Section 3.

In Section 4, the single-system epfd results, obtained using the U.S. Resolution 609 calculation tool, are compared to other operator/administration results.

2 Executive Summary

2.1. Maximum Aggregate EPFD ResultsFor the maximum aggregate epfd results provided in this report, the single-system epfd results provided by notifying administrations were used except for the following two cases:

The “epfd” data provided by India for the INSAT-NAVR(129.5) network appears to actually be power flux density (pfd) data. Therefore, the epfd data for INSAT-NAVR(129.5) as calculated by the U.S. was used instead of India’s data to compute the maximum aggregate epfd. (Section 4.2).

The epfd data provided by India for INSAT-NAVR-GS + INSAT-NAV-NGSA IGSO network needs to be confirmed (see Section 4.3). For this reason, the U.S. used the epfd data from 12th CM.

Based on this assumption, the U.S. obtained the following results:

The maximum aggregate epfd level is -121.98 dB(W/(m2∙MHz)), 0.48 dB below the Resolution 609 limit of -121.5 dB(W/(m2∙MHz)). This value occurs at 1 176 MHz. The U.S. believes this value is the correct maximum aggregate epfd value to report out of the 13th CM. (See Section 3.1 below for more details.)

2.2 Thirteenth Consultation Meeting Single-System EPFD ResultsThe following administrations provided new or updated RNSS system information:

Luxembourg provided information on a new GSO network at 129⁰ W, LUX-G9-38-A.

India confirmed that their GSO network at 131.5E is no longer valid. As its replacement, India provided a new network at 129.5⁰ E.

India provided additional information on the INSAT-NAVR-GS + INSAT-NAV-NGSA system. They provided off-axis eirp density values up to 14 degrees in elevation. They also provided corresponding epfd data.

The main conclusions from U.S. calculations of single-system epfd results for new or updated inputs to the 13th CM are as follows:

The U.S. epfd results for Luxembourg LUX-G9-38-A are in very close agreement with those provided by the notifying administration. However, the U.S. noted that the pfd and epfd data sets provided by Luxembourg are not in the correct format. The rows and columns of the data table should represent longitudes and latitudes, respectively. The data sets provided by Luxembourg were transposed – i.e., the rows were latitudes and columns were longitudes.

The INSAT-NAVR(129.5E) epfd data provided by India appears to be pfd data (see Section 4.2).

The INSAT-NAVR-GS/INSAT-NAV-NGSA epfd data appears to be questionable (see Section 4.3).

3 Maximum Aggregate EPFD Results

3.1 RNSS Systems Taken into Account in the Aggregate EPFD CalculationsThe list of RNSS systems considered for maximum aggregate epfd calculations is shown in Table 1.

3.2 Maximum Aggregate EPFD results using U.S. ToolThe maximum aggregate epfd results are summarized in Table 2 and Figure 1. The maximum aggregate epfd is -121.98 dB(W/(m2∙MHz)), which occurs at 1 176 MHz. The remaining margins before exceeding the Resolution 609 limit of -121.5 dB(W/(m2∙MHz)) is 0.48 dB.

Table 1: RNSS Systems and aggregate epfd Calculation Sets

System # RNSS System Name Administration Input Data Source1 MSATNAV-2 F/GLS 8th CM2 NAVSTAR GPS USA 8th CM3 GLONASS-M (FDMA) Russia 8th CM4 GLONASS-M (CDMA) Russia 11th CM

5 (Note 1) COMPASS-MEO (Regional) China 11th CM6 (Note 2) COMPASS MEO (Global) China 11th CM7 (Note 1) COMPASS IGSO (Regional) China 11th CM8 (Note 2) COMPASS IGSO (Global) China 11th CM

9 QZSS Japan 10th CM10 QZSS GS3 (123E) Japan 10th CM11 QZSS GS4 (127E) Japan 10th CM

12 LM-RPS-133W USA 8th CM13 LM-RPS-107.3W USA 8th CM14 INMARSAT GSO-2N (64E) Great Britain 11th CM15 INMARSAT-4 143.5E/-4A 143.5E Great Britain 8th CM16 INMARSAT-4 98W/-4A 98W Great Britain 8th CM

17-23 (Note 1)

COMPASS GSO (Regional) China 11th CM

24-28 (Note 2)

COMPASS GSO (Global) China 11th CM

29 INSAT-NAV(55)(GAGAN) India 10th CM30 INSAT-NAV(83)(GAGAN) India 10th CM31 INSAT-NAVR(32.5) (IRNSS) India 10th CM32 INSAT-NAVR(83) (IRNSS) India 10th CM33

(Note 3)INSAT-NAVR(129.5) (IRNSS) India 13th CM

34(Note 4)

INSAT-NAVR-GS + INSAT-NAV-NGSA

India 10th CM

35 NIGCOMSAT-1R Nigeria 8th CM36 LUX-G6-2-E Luxembourg 8th CM37 LUX-G7-9-E2 Luxembourg 9th CM38 LUX-G9-38-A Luxembourg 13th CM39 ALCOMSAT-24.8W Algeria 11th CM40 RAGGIANA-18 PNG 11th CM

Note 1: The space constellation of the COMPASS regional system includes at most 18 satellites: 7 IGSOs, 4 MEOs and 7 GSOs (COMPASS-58.75E/80E/110.5E/140E/160E/B-84E/B-144.5E).Note 2: The space constellation of the COMPASS global system consists of 35 satellites: 3 IGSOs, 27 MEOs and 5 GSOs ((COMPASS-58.75E/80E/110.5E/140E/160E).Note 3: U.S. calculated epfd data was used.Note 4: The epfd data from 12th CM was used.

Table 2: Maximum aggregate epfd calculation results

Frequency (MHz)

Max. aggregate

epfd dB(W/(

m2∙MHz))

Frequency (MHz)

Max. aggregate

epfd dB(W/(

m2∙MHz))

Frequency (MHz)

Max. aggregate

epfd dB(W/(

m2∙MHz))

Frequency (MHz)

Max. aggregate

epfd dB(W/(

m2∙MHz))

1164.00 -139.1633 1177.00 -123.1408 1190.00 -135.7114 1203.00 -125.66831165.00 -140.4049 1178.00 -123.5629 1191.00 -134.7696 1204.00 -124.78271166.00 -140.0728 1179.00 -124.3935 1192.00 -134.8071 1205.00 -124.4681167.00 -139.1318 1180.00 -124.7773 1193.00 -135.5987 1206.00 -123.66241168.00 -136.1633 1181.00 -125.9106 1194.00 -136.4648 1207.00 -122.54251169.00 -132.8378 1182.00 -127.6895 1195.00 -138.0119 1208.00 -123.55391170.00 -129.4268 1183.00 -130.1413 1196.00 -138.5533 1209.00 -125.2551171.00 -126.9546 1184.00 -132.8461 1197.00 -137.6866 1210.00 -125.8421172.00 -126.2022 1185.00 -136.2069 1198.00 -135.3626 1211.00 -126.98381173.00 -124.9282 1186.00 -139.0019 1199.00 -132.926 1212.00 -128.25211174.00 -124.2835 1187.00 -141.2966 1200.00 -130.3928 1213.00 -130.1171175.00 -123.4153 1188.00 -139.8549 1201.00 -128.4002 1214.00 -132.39211176.00 -121.9792 1189.00 -137.6325 1202.00 -126.7623 1215.00 -135.6614

Figure 1: Maximum aggregate epfd results. The maximum aggregate epfd value calculated using the U.S. tool is -121.979 dB(W/(m2∙MHz)) and occurs at 1 176 MHz.

4 Thirteenth CM Single-System EPFD Results

4.1 LUX-G9-38-AFor the 13th CM, Luxembourg submitted information on LUX-G9-38-A, a GSO network at 129⁰ W. The pfd and epfd data provided by Luxembourg are shown in Figure 2 and Figure 3, respectively. The U.S. calculated epfd data shown in Figure 4 closely resembles the epfd data shown in Figure 3. The comparison of the maximum epfd values are shown in Figure 5. The results are in very close agreement.

Figure 2: LUX-G9-38-A pfd data provided by Luxembourg

Figure 3: LUX-G9-38-A epfd data provided by Luxembourg

Figure 4: U.S. calculated epfd data for LUX-G9-38-A

Figure 5: Comparison of the maximum epfd results from U.S. and Luxembourg for LUX-G9-38-A

4.2 INSAT-NAVR(129.5)For the 13th CM, India submitted information on INSAT-NAVR(129.5), a GSO network at 129.5⁰ E. The pfd and epfd data provided by India are shown in Figure 6 and Figure 7, respectively. It is apparent from these two figures that they both are pfd data. The U.S. calculated epfd data is shown in Figure 8 while the maximum epfd along latitudes is shown in Figure 9. To verify these epfd values, an Excel spreadsheet is included as an attachment to this contribution. The U.S. maximum aggregate epfd calculations used these epfd values.

Figure 6: INSAT-NAVR(129.5) pfd data provided by India

Figure 7: INSAT-NAVR(129.5) “epfd” data provided by India

Figure 8: INSAT-NAVR(129.5) epfd data calculated using U.S. tool

Figure 9: Maximum epfd results for INSAT-NAVR(129.5) using U.S. tool

4.3 INSAT-NAVR-GS + INSAT-NAV-NGSA India’s INSAT-NAVR-GS covers the four IRNSS geo-synchronous satellites in two orbital planes with an inclination of 29 degrees. Two of the four satellites are in one orbital plane with equatorial crossings at 55⁰E, while the other two satellites are in a second orbital plane with 111.75⁰ E equatorial crossing. INSAT-NAV-NGSA covers the four IRNSS geo-synchronous satellites in four orbital planes with an inclination of 42⁰ and equatorial crossings at 46.5⁰ E, 65.5⁰ E, 94.5⁰ E and 119.75⁰ E. For the work of 13th CM, India stated that there is no material change in the constellation parameters of the IRNSS IGSO satellite system covered under these two filings.Noting Section 12.b of the Record of Decisions of 12th Res-609 CM, India submitted additional data on the off-axis e.i.r.p. density values for off-axis angles beyond 11 degrees up to 14 degrees. India also provided updated epfd data which is shown in Figure 10. Upon examination, this epfd data set appears to be inconsistent with the characteristics of the IRNSS IGSO network. The IRNSS IGSO equatorial crossings are localized between 46.5⁰E and 119.75⁰E and, therefore, the network coverage shouldn’t include the western hemisphere, e.g., North and South America. Rather, the epfd data from the 12th CM shown in Figure 11 is what we would expect for a regional system such as IRNSS. Interestingly, the maximum epfd values along latitudes for the two data sets are in good agreement (Figure 12). However, the maximum epfd values along longitudes show the discrepancies (Figure 13). For these reasons, the U.S. maximum aggregate epfd calculations used the epfd data from the 12th CM.

Figure 10: INSAT-NAVR-GS + INSAT-NAV-NGSA “epfd” data provided by India

Figure 11: INSAT-NAVR-GS + INSAT-NAV-NGSA epfd data from 12th CM

Figure 12: INSAT-NAVR-GS + INSAT-NAV-NGSA maximum epfd data along latitudes

Figure 13: INSAT-NAVR-GS + INSAT-NAV-NGSA maximum epfd data along longitudes

Attachments

Excel file containing U.S. calculation of INSAT-NAVR(129.5) epfd