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

3 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

Monitoring NRT solutions

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

4 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

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

5 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

Station PAYE (first GNSS update)

June 14, 2007

Stefan Schaer Daniel Ineichen Elmar Brockmann

6 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

Optimised baseline selection strategy

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

(not yet included: Receiver Type)

7 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

GPS Aug 2007

DOY 2007

8 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

GPS + GLONASS Aug 2007

DOY 2007

9 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

GPS + GLONASS Aug 2007

DOY 2007

10 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

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

PP Abs.-Cal. + GNSS

NRT Abs.-Cal.

GNSS

11 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

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

12 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

EPN Tropo combination

Refined processing options.

13 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

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.

14 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

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

15 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

16 Swiss Federal Office of Topography swisstopo

LPT status report EGVAP, Matera

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

GNSS