Galileo Geodetic Service Provider Prototype
GGSP: Realisation of the Galileo
Terrestrial Reference Frame
Wolfgang Söhne
Söhne, Johannes Ihde
Federal Agency for Cartography and Geodesy
G dG
Gerd
Gendt,
d Markus
M k R
Rothacher
h h
GeoForschungsZentrum Potsdam
GGSP Prototype Team
EUREF Symposium, Brussels, June 18-21, 2008
Content
IIntroduction:
t d ti
Status
St t off Galileo
G lil
Status of the Galileo Geodetic Service Provider
(GGSP) Prototype
Derivation of the Galileo Terrestrial Reference
Frame (GTRF)
‹ GTRF realization
‹ GTRF maintenance
‹ Results
Recommendations for the Galileo Reference
Service Provider (GRSP)
The GGSP project is managed by the European GNSS
Supervisory Authority (GSA) through EU 6FP fundsEUREF, Brussels
01/08/2008
2
Introduction: Status of Galileo
Financing
Fi
i
off Galileo
G lil secured
d by
b EU finance
fi
minister decision, but
Implementation delayed by several years → InOrbit-Validation (IOV) phase n.e.t. end of 2009 →
F ll Operational
Full
O
ti
l Capacity
C
it (FOC) n.e.t.
t 2012
Third bidder consortium for the Galileo Space
S
Segment
t (beside
(b id EADS and
d OHB)? Biddi
Bidding tto
start this summer
T
i
t l satellites
t llit started
t t d
Two
experimental
EUREF, Brussels
01/08/2008
3
Introduction: Status of GIOVE satellites
GIOVE-A
GIOVE
A started
t t dD
Dec 2005 with
ith ttwo years
operational life time → still working
GIOVE-B successfully started (delayed) in April
2008 → GIOVE-A2 not necessary
Main features of GIOVE-B:
2,5 years operational life time
First H-Maser clock on a navigation satellite,
expected stability 1ns/day
Limitation to two simultaneous frequencies
g
1100 Watts p
power generation
Several results of GIOVE-A published (T. Springer, 2008)
Promising first results of GIOVE-B
EUREF, Brussels
01/08/2008
4
Status of GGSP Prototype
Galileo
G
lil Geodetic
G d ti Service
S
i Provider
P
id Prototype
P t t
started in July 2005 as project of the 6th FP of
the EU
Prolongation until May 2009
Main tasks:
Realization of a GTRF aligned to the ITRF
Inclusion of GSS when installed
Entity
y between GCS and services and users
Software extension for Galileo:
Bernese,
Galileo ready”
ready
Bernese NAPEOS and EPOS “Galileo
EUREF, Brussels
01/08/2008
5
Initial GTRF realization
IInitial
iti l realization
li ti
in
i November
N
b 2007
About 100 IGS sites and 13 GESS
Campaign-wise analysis (4 weeks each three
months)
RINEX 3.0 as standard data format within GGSP
for GPS+Galileo data
Software tests and validation
EUREF, Brussels
01/08/2008
6
Initial GTRF realization
EUREF, Brussels
01/08/2008
7
Galileo Experimental Sensor Stations
G
Ground
d network
t
k ffor GIOVE satellites
t llit
EUREF, Brussels
01/08/2008
8
RINEX 3.0
1stt version
i
Nov
N 2007 (W
(W. G
Gurtner
t
/L
L. E
Estey)
t )
“The upcoming European Navigation Satellite System Galileo and the
enhanced
e
a ced G
GPS
S with
t new
e frequencies
eque c es a
and
d obse
observation
at o types,
especially the possibility to track frequencies on different channels,
ask for a more flexible and more detailed definition of the observation
codes.”
Better differentiation between the systems
3 characters for each observation type
Line length no longer limited to 80 char
EUREF, Brussels
01/08/2008
9
Maintenance of GTRF
Continuous
C
ti
operation
ti
to
t start
t t in
i September
S t b
2008
Weekly solutions validated with IGS Finals
Semi-annual releases
Combination aligned to ITRF2005
EUREF, Brussels
01/08/2008
10
Maintenance of GTRF
EUREF, Brussels
01/08/2008
11
Results: internal precision
Repeatability w.r.t.
w r t the cumulative solution
(Z. Altamimi, 2008)
EUREF, Brussels
01/08/2008
12
Results: GESS & IGS residuals
Torino Italy
Torino,
(Z. Altamimi, 2008)
EUREF, Brussels
01/08/2008
13
Results: GESS & IGS residuals
Kiruna Sweden
Kiruna,
(Z. Altamimi, 2008)
EUREF, Brussels
01/08/2008
14
Results: GESS & IGS residuals
Nordwijk The Netherlands (ESTEC test site)
Nordwijk,
Without discontinuity
Discontinuity introduced
(Z. Altamimi, 2008)
EUREF, Brussels
01/08/2008
15
Results: transformation parameters
(Z. Altamimi, 2008)
EUREF, Brussels
01/08/2008
16
Results: Orbits & clocks
(G. Gendt, 2008)
EUREF, Brussels
01/08/2008
17
Results: transformation parameters
(G. Gendt, 2008)
EUREF, Brussels
01/08/2008
18
Results: ERP
(G. Gendt, 2008)
EUREF, Brussels
01/08/2008
19
Recommendations for the transition phase
II.e. phase
h
between
b t
the
th end
d off GGSP prototype
t t
and
d
IOV
Continuation of GESS monitoring
Continuation of estimating versioned GTRF
realization
Starting of permanent processing in September
2008 until IOV
Simulations concerning number and distribution
of GSS
Gradually substitution of IGS sites by GSS
EUREF, Brussels
01/08/2008
20
Recommendations for the operational service
Upgrade
U
d off existing
i ti
IGS+EPN
IGS EPN stations
t ti
to
t GPS +
GLONASS + Galileo stations
Inclusion of GSS into the IGS+EPN
Extension of IGS+EPN products for Galileo
Preparing standards, data bases etc. for Galileo
Development
p
of user-specific
p
products
p
to
increase the acceptance of the GRSP
EUREF, Brussels
01/08/2008
21
GGSP/GRSP and EUREF
Selection criteria of IGS/EPN stations
‹ Co-location with VLBI/SLR
‹ High-quality time reference
‹ Proposed Galileo site
21 EPN/IGS sites
it in
i GTRF
‹ 6 GPS+GLONASS
‹ 7 ECGN
Encourage GRSP to
announce
a
ou ce tthe
e GSS as EPN
stations
EUREF, Brussels
01/08/2008
22
Thank you for your attention!
http://www.ggsp.eu
EUREF, Brussels
01/08/2008
23