Armasuisse Swiss Federal Office of Topography swisstopo swisstopo (LPT) Report 2006/2007 E....

armasuisseSwiss Federal Office of Topography swisstopo

swisstopo (LPT) Report 2006/2007

E. Brockmann

2 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

EUREF – EUMETNET MoU

• Signed at EUREF06 in London• Good bases for further collaboration between E-GVAP and

EUREF



Monitoring NRT solutions

• Only graphical adaptations to new corporate design• New internet system planned till end of the year



Processing

• Bernese Software 5.0 (+)• ~ same number of stations• Absolute antenna model since

GPS week 1401 (Nov. 2006)• GNSS PP analyses

(GLONASS ambiguities float) since week 1401

• GNSS enhancement of AGNES in June/July 2007: 2/3 of the stations with GNSS receivers equipped

• GNSS NRT analyses(GLONASS ambiguities fixed) since 2 weeks



Station PAYE (first GNSS update)

June 14, 2007

Stefan Schaer Daniel Ineichen Elmar Brockmann



Optimised baseline selection strategy

MAX-OBS-> MAX-OBS / SHORTEST / GNSS Baselines

(not yet included: Receiver Type)



GPS Aug 2007

DOY 2007



GPS + GLONASS Aug 2007

DOY 2007



Validation Postprocessing – NRT – RRTReference: PP Rel.-Cal.

PP Abs.-Cal. + GNSS

NRT Abs.-Cal.

GNSS



Influence Antenna ModelRel. PCV -> abs. PCV

ZTD Biases: PP GPS Rel. Cal. - PP GNSS Abs. Cal. (week 1437-1439, Jul/Aug, 2007)

-10

-5

0

5

10

15

AN

DE

BO

UR

BS

CN

CH

TL

DO

UR

EN

TZ

ER

DE

EX

WI

FC

LZ

FL

DK

FR

IC

GE

NO

GR

AZ

HA

BG

HO

HT

KA

RL

KO

PS

KR

BG

LE

CH

LIN

Z

LU

ZE

MA

RS

ME

DI

NA

NT

PA

DO

PF

AN

RA

VE

SA

AN

SA

NB

SB

GZ

SC

HW

SJD

V

ST

AB

ST

J9

TR

YS

VA

RE

WA

B1

WE

HO

ZE

RM

ZIM

M

JUJO

Station

Bia

s [

mm

]

1437

1438

1439



EPN Tropo combination

Refined processing options.



Summary

• Absolute antenna phase center model used since GPSWeek 1400 (Nov. 2006) for NRT and PP. Influence is 4-12 mm dependent of antenna type on the station

• GNSS processing (ambiguity float) introduced in postprocessed solutions since GPSWeek 1401. The influence on ZTD is very small.

• 2/3 of the AGNES sites with GNSS receivers• New baseline strategy (shorter baselines) is a prerequisite

for GNSS ambiguity resolution.• GNSS ambiguity fixed solutions since 2 weeks. Influence on

NRT need to be validated.



Action Items

• Installation of remaining 10 AGNES sites: GPS -> GNSS (double station concept)

• Ambiguity resolution GNSS for longer baselines and for mixed receivers including proper inter-phase bias handling (-> hope to realize improvements for NRT ZTD + GNSS-tomography)

• More “Super Sites” in LPT processing



Validation: Reference PP GNSS ABS-CAL PP Abs.-Cal. +

GNSS

Armasuisse Swiss Federal Office of Topography swisstopo swisstopo (LPT) Report 2006/2007 E....

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