0302 ferland - igs analysis center coordinator (acc)of the reprocessed igs analysis center ... gps...
TRANSCRIPT
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Combinationof the reprocessed
IGS Analysis CenterySINEX solutions
Rémi FerlandGeodetic Survey Division
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
ContentsContents
I d i• Introduction• Contribution• Combined Products:
• Coordinates’• ERP’s
• Apparent Geocenter
• Summary• Summary• Recommandations
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Introduction
• Main Objective:– Improve products consistency to better meet users requirements
• Original SINEX products:– AC contribution started in early 1996 (Wk 0837)y ( )– Combinations:
• GNAACs (mit & ncl) combination since 1996• Pilot Project ~1999 (Wks 0999 – 1049)• Official since ~2000 (Wks 1050 – Now)
• Latest SINEX products:– Reprocessed:p
• 1994.0 - 2008.0 (Wks 0730 – 1459)– Official (Included for completeness):
• 2008.0 - 2010.1 (Wks 1460 – 1566)( )
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Contributing Agencies
• co[d1] Center for Orbit Determination in Europe University of Bern Switzerland• co[d1] Center for Orbit Determination in Europe, University of Bern, Switzerland• em[r1] Natural Resources, Canada • es[a1] European Space Operations Center, ESA, Germany • gf[z1] GeoForschungsZentrum, Germany• gt1 GeoForschungsZentrum, Germany (Tiga)• jp[l1] Jet Propulsion Laboratory, USA• mi[t1] Massachusetts Institute of Technology, USA (AC + GNAAC)• nc[l1] Newcastle England (GNAAC)nc[l1] Newcastle, England (GNAAC)• ng[s1] National Oceanic and Atmospheric Administration / NGS, USA • pd1 GFZ Potsdam/IPG Dresden, Germany• si[o1] Scripps Institution of Oceanography, USA• ul1 University of La Rochelle, France (Tiga)
11 ACs + 2 GNAACS
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Contributed SolutionsAC (11) Software (6) Data span # of Stations Comments
[d1] B 1994 0 2010 0 322 E l d d ERPco[d1] Bernese 1994.0 - 2010.0 322 Excluded ERPs
em[r1] Gipsy 1995.0 - 2010.0 229
es[a1] NAPEOS 1995.0 - 2010.0 418
gf[z1] EPOS 1994.0 - 2010.0 299 Excluded apparent geocentergf[z1] EPOS 1994.0 2010.0 299 Excluded apparent geocenter
gt1 EPOS 1998.0 - 2008.0 390 Excluded apparent geocenter
jp[ll] Gipsy 1996.0 - 2010.0 413
mi[t1] Gamit 1998.0 - 2010.0 700
ng[s1] Page 1995.0 - 2010.0 436 Excluded pole position (1994.0 - 2000.0)
pd1 Bernese 1994.0 - 2008.0 201 Excluded LOD
si[o1] Gamit 1994.0 - 2010.0 422 Excluded pole rate (2008-2010)
ul1 Gamit 1996.0 - 2007.0 275 Excluded apparent geocenter (no ERPs)
GNAAC(2)
MIT 2008.0 - 2010.0 632 Comparison only.
nc[l1] 2000.0 - 2010.0 355 Comparison only
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Weekly AC Contributed Solutions
4 ACs Contributed to 1994.0 8 ACs Contributed to 2010 04 ACs Contributed to 1994.0 8 ACs Contributed to 2010.03 ACs Contributed the entire period
Contribution to ITRF2008 (1997.0 – 2009.5) 492 stations
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
AC Networks (Total # of stations)
co[d1] (322) em[r1] (229) es[a1] (418) gf[z1] (299)
gt1 (390) jp[l1] (413) mi[t1] (700) ng[s1] (436)
pd1 (201) si[o1] (422) ul1 (275)
Grand Total 900 +
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010Stations Usage by the ACsfor at least 2 yearsfor at least 2 years
# ACs (# sta)
▲ 7 – 8 (70)
▲ 9 – 11 (185)
▲ 3 4 (122)
▲ 5 – 6 (81)
▲ 1 – 2 (185)
▲ 3 – 4 (122)
166 in IGS08 (241)84 in IGS08 core (94)
Total 643
_ ( )
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Stations Data Span
Years of Data (# sta)
▲ 11.0 – 14.0 (81)
▲ 14.0 – 16.0 (78)
▲ 5 0 8 0 (157)
▲ 8.0 – 11.0 (158)
▲ 2.0 – 5.0 (169)
▲ 5.0 – 8.0 (157)
Total 643
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Stations in the IGSWeekl CombinationWeekly Combination
500500
94.0
98.0
02.0
08.0
10.0
00.0
400
450
400
450 199
199
200
200
201
200
1 sta./y
250
300
350
tatio
ns
250
300
350
tatio
ns
150
200
250
# of
St
150
200
250
# of
St
50
100
50
100
Official
0700 800 900 1000 1100 1200 1300 1400 1500 1600
GPS Week
Official0700 800 900 1000 1100 1200 1300 1400 1500 1600
GPS Week
OfficialRepro1
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Reference Frame Stations in the Weekly Combinationsthe Weekly Combinations
140140
100
120
100
120
80
100
tatio
ns 80
100
tatio
ns
40
60# of
St
40
60# of
St
20
40
20
40
IGS97 IGS00 IGb00 IGS05To strengthen theFrame Realization
for 1994,5 stations were added:
0700 800 900 1000 1100 1200 1300 1400 1500 1600
GPS Week
0700 800 900 1000 1100 1200 1300 1400 1500 1600
GPS Week
BRMU, FORT, GRAZ,HOLB, KOSG
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010ACs Coordinates Residuals Avg & Std w r t IGS05Avg. & Std. w.r.t. IGS05
NAnnualSignal
Amplitude N
mm
)
m)
p~1mm
Best Consistency:N&E ~2 5mm
Eg. (m
d. (m
05
N&E ~2.5mmH ~ 7mm
E
Avg
Std
IGS0
Older=noisier(solns. & IGS05)
H
Time series shifted by multiples of 3 mm.
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010ACs Coordinates Residuals Avg & Std w r t IGS WeeklyAvg. & Std. w.r.t. IGS Weekly
NN
m)
m)
Best Consistency:
Eg. (m
d. (m
mN&E ~1mmH ~ 2.5 mm
E
Avg
Std
tes
on
Older=noisier
H
AC
dom
inat
com
bina
tio
Time series shifted by multiples of 3 mm.
No
Ath
e
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010ACs Coordinates ResidualsAvg & Std w r t IGS CumulativeAvg. & Std. w.r.t. IGS Cumulative
NAnnualSignal
N
m)
m)
Amplitude~1mm
Best Consistency:
Eg. (m
m
d. (m
myN&E ~ 1.5mm
H ~ 5mmOlder=noisier
E
Avg
Std
Again,
H
g ,Older=noisier
Time series shifted by multiples of 3 mm.
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
ACs Scale offset
Time series shifted by multiples of 1 ppb.
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
IGS Scale Offsetb
b/y
e =
0.3p
pb
= -0
.2pp
b0.
000
ppb
Am
plitu
de
Bia
s D
rift ≈
ual s
igna
l AA
nnu
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010AC Apparent Geocenter Weekly Residuals and Formal UncertaintyResiduals and Formal Uncertainty
) mm
)
X
(mm
)
inty
(m
Best Consistency:X&Y ~1mm
Yuals
(
certa
iZ ~ 3mmOlder=noisier
sY
Res
idu
l Unc
C D
omin
ates
ombi
natio
n
Z
R
orm
al
No
AC
the
Co
ng1 A~7mmmi1 A~5mm
Fo
Time series shifted by multiples of 20 mm.
si1 A~15mm
ng1 A~7mm
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010Combined ApparentGeocenter Position w r t IGS05Geocenter Position w.r.t. IGS05
~ W
k 10
50~
5 m
m
YX~
co[d1]
gt1
gf[z1]
es[a1]
em[r1]
[ ]
CACsZ
si[o1]
pd1
ng[s1]
mi[t1]
jp[l1]ACACs
700 800 900 1000 1100 1200 1300 1400 1500 1600
ul1
GPS Week
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010ACs Daily ERPs Residuals w.r.t. the IGS Combinedthe IGS Combined
LOD Xp Yp
Xpr YprXpr YprConsistency:LOD ~ 10µs[XY] 0 03[XY]p ~ 0.03mas[XY]pr ~ 0.10mas/d(Older=noisier)
Time series shifted by multiples of 100µs, 50mas, 100 mas/y
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Daily ERPs STD
LOD XPO XPOR YPO YPORem1 25.7 5.7 33.4 7.0 26.6es1 17.3 5.4 21.0 4.8 29.0gf1 14 9 4 7 10 3 5 5 11 9gf1 14.9 4.7 10.3 5.5 11.9gt1 19.2 3.7 13.9 3.8 12.6jp1 23.0 5.5 18.3 4.6 18.2jpmi1 10.0 3.0 13.3 2.6 18.6ng1 17.0 9.0 20.7 7.6 26.6pd1 8.9 20.7 12.0 20.4si1 22.5 7.1 28.6 7.2 31.4
Red = Smallest STDGreen = Largest STD
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Pole Position Misclosure at Day Boundary
X 0 10
StdX 0.10 mas
Y 0.11 mas
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Pole Position and Rate F l U t i tFormal Uncertainty
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Summary (1/2)
• Contributors :– 11 ACs– 2 GNAACs
• Time span:Time span:– Reprocessed: 1994.0 – 2008.0– Official: 2008.0 – 2010.1
N i ifi t di ti it b d t th– No significant discontinuity observed at the reprocessed/Official solutions boundary
• Network:– All contribution : 900 + stations– With 2 years + : 643 stations
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Summary (2/2)
• ACs products best consistency:ACs products best consistency: – Coordinates w.r.t.:
IGS05 (N-E ~ 2.5 mm, H ~ 7 mm) IGS Weekly (N-E ~ 1 mm, H ~ 2.5 mm) IGS Cumulative (N-E ~ 2 mm, H ~ 5 mm)
– ERPs:ERPs: LOD ~ 10us ( [XY]p ~ 0.03 mas; [XY]pr ~ 0.10mas/d)
– Geocenter: X & Y ~1 mm Z ~ 3mm– Older (pre-1996) solutions consistency substantially worse
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
RecommendationsRecommendations
• Improve older combinations (pre-1996)– All Acs should contribute (Half have done it)– More stations … if possible.
• All ACs should contribute all parametersp• All contributed Parameters should be
unconstrained or at least unconstrainable.unconstrained or at least unconstrainable.
IGS10, Newcastle upon Tyne • England , 28 June – 2 July , 2010
Acknowledgements
• Co[d1] Center for Orbit Determination in Europe University of Bern Switzerland• Co[d1] Center for Orbit Determination in Europe, University of Bern, Switzerland• Em[r1] Natural Resources, Canada • Es[a1] European Space Operations Center, ESA, Germany • gf[z1] GeoForschungsZentrum, Germany• gt1 GeoForschungsZentrum, Germany (Tiga)• jp[l1] Jet Propulsion Laboratory, USA• mi[t1] Massachusetts Institute of Technology, USA (AC + GNAAC)• nc[l1] Newcastle England (GNAAC)nc[l1] Newcastle, England (GNAAC)• ng[s1] National Oceanic and Atmospheric Administration / NGS, USA • pd1 GFZ Potsdam/IPG Dresden, Germany• si[o1] Scripps Institution of Oceanography, USA• ul1 University of La Rochelle, France (Tiga)
• All Data/Products Centers• All Agencies and people that contributed station data.All Agencies and people that contributed station data.