Analysis of the time series at the 3-4 multi-technique GGOS sites to analyze and compare the spectral content of the space geodetic and gravity time series. Evaluate the level of agreement between the space geodesy measurements and the physical tie vectors

Bonvalot, S.

Lemoine, F.

Luceri, V.

MacMillan, D.

Moreaux, G.

Pavlis, E.

Saunier, J.

NASA Technical Reports Server

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G14A-06 - Analysis of the DORIS, GNSS, SLR, VLBI 
and gravimetric time series at the GGOS core sites
G. Moreaux (CLS), F. Lemoine (NASA), V. Luceri (E-GEOS), E. Pavlis (NASA), D. MacMillan 
(NASA), S. Bonvalot (IRD) and J. Saunier (IGN)
https://ntrs.nasa.gov/search.jsp?R=20180000569 2019-08-30T13:18:26+00:00Z
Motivation & Goals
• Motivation & Goals: analysis of the time series at the 3-5 multi-technique GGOS sites to
– Analyze and compare the spectral content of the space geodetic and gravity time series.
– Evaluate the level of agreement between the space geodesy measurements and the
physical tie vectors.
• Data sources:
– DORIS: coordinate time series from the latest IDS combined series (ids 12).
– GNSS : coordinate time series from the IGS Combination Center (ftp://igs-rf.ign.fr/).
– Laser : coordinate time series from the operational ILRS combination.
– VLBI : coordinate time series from GSFC.
– Gravity: BGI.
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http://ids-doris.org
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Source: GGAO/BKG
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Multi technique sites
http://ids-doris.org
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# techniques # sites
4 6
3 10
• Fairbanks, Hartebeesthoek, Metsahovi, Ny-Alesund: co-location > 1km.
• Wettzell: DORIS started recently (2016/09/27).
Badary (Russia)
• Host agency: Institute of Applied
Astronomy (of the Russian Academy of
Sciences)
• 4 techniques
• DORIS:
– Since 1991/12/11.
– BADA, BADB.
• GNSS:
– Since 2005/04/01.
– BADG.
• SLR:
– Since 2011/07/10.
– 1890 (BADL).
• VLBI:
– Since 2007/03/01.
– 7382.
• Tie vectors:
– BADB/BADG/7382.
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http://ids-doris.org
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Badary (Russia) - Sitelog
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http://ids-doris.org
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Date Technique Event
2004/08/10 DORIS Station change (BADA  BADB)
2006/09/25 Ties BADB vs BADG, BADB vs 1890
2007/04/02 GNSS Antenna change
2010/03/15 GNSS Antenna change
2011/06/06 Ties 1890 vs 7382
Technique Monument Description (from sitelogs)
DORIS (BADB)
Ant. support: 30cm sided very rigid metal tower 1m high
Installed on: Thick aluminium plate fixed on the terrace roof
of a 3 storied building.
GNSS (BADG)
Stainless plate on concrete pillar on flat roof of 2-storied 
laboratory buidling (16m above the ground).
SLR (BADL) Concrete pillar.
BADB
BADG
BADL
7382
Unit: m DORIS GNSS SLR VLBI
DORIS 4.285 46.324 92.457
GNSS 4.285 45.562 96.619
SLR 46.324 45,562 104.208
VLBI 92.457 96.619 104.208
Badary (Russia) – Time series
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DORIS - GNSS
Unit: mm/yr DORIS GNSS VLBI
Vel – East 25.3 ± 0.6 26.5 ± 0.1 26.1 ± 0.4
Vel – North -5.9 ± 0.4 -6.6 ± 0.1 -6.2 ± 0.3
Vel - Up 1.9 ± 0.5 1.6 ± 0.3 1.1 ± 0.9
Time Span: 2012.0-2017.0
Mean Velocity
Annual Signal Content
Units: mm & 
deg
DORIS GNSS VLBI
East - - -
North - 1.0 ± 0.2 (126.2) -
Up 4.3 ± 0.7 (32.9) 5.2 ± 0.5 (28.0) -
 ENU velocities all agree to w/in 
their respective std dev
 Very good agreement between
DORIS and GNSS in the up.
Yarragadee (Australia)
• Host agency: Geoscience Australia
• 4 techniques
• DORIS:
– YARA, YARB, YASB - Since 1992/09/14.
• GNSS:
– YAR2, YAR3, YARR - Since 1990/12/03.
• SLR:
– 7090 (YARL, Moblas-5) - Since 1979/07/01.
• VLBI:
– 7376 - Since 2011/05/18.
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http://ids-doris.org
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Yarragadee (Australia) - Sitelog
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Date Technique Event
1997/08/18 GNSS Antenna change
1998/08/01 Ties YARA vs YAR2, YARA vs 7090
1999/10/01 Ties YARB vs YAR2
1999/10/04 DORIS Station change (YARA  YARB)
2002/05/13 GNSS Antenna change
2003/11/01 Ties
YASB vs YAR2, YARB/YASB vs 
7090
2003/11/27 DORIS Station change (YARB  YASB)
2010/06/12 Ties 7090 vs 7376
2013/06/17 GNSS Antenna change
Technique Monument Description (from sitelogs)
DORIS (YASB) 0.3m stainless steel tripod on 1.5m high concrete pillar.
GNSS (YAR2)
Stainless plate on concrete pillar on flat roof of 2-storied 
laboratory buidling (16m above the ground).
SLR (7090) Concrete block.
Unit: m DORIS GNSS SLR VLBI
DORIS 48.080 36.690 155.779
GNSS 48.080 23.152 147.451
SLR 36.690 23.152 131.615
VLBI 155.779 147.451 131.615
Yarragadee (Australia) - Time series
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DORIS –SLR 
Unit: mm/yr DORIS GNSS SLR
Vel – East 39.4 ± 0.3 38.7 ± 0.1 38.3 ± 0.1
Vel – North 58.1 ± 0.2 58.1 ± 0.1 58.4 ± 0.1
Vel - Up -0.5 ± 0.2 0.2 ± 0.1 -1.1 ± 0.1
Mean Velocity
 EN velocities all agree to w/in 
their respective std dev
 Up velocity must be analyzed
Time Span: 2004.0-2010.5
Summary and Next
• Summary
– List of 3-4-5 technique sites.
– List of stations, time periods, station events, monument types, ties from
the technique sitelog files.
– Badary: good agreement for the ENU velocities and annual amplitude for
DORIS and GNSS. This signal may result from the hydrologic and
atmospheric loading.
– Yarragadee: up velocity differences must be investigated.
• Next
– More detailed analysis of the periodic signals and tie discrepancies.
– Comparisons with ITRF2014, DTRF2014 output.
– Adding of gravimetric data.
– More sites.
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G14A-06- Analysis of the DORIS, GNSS, SLR, VLBI and Gravimetric Time Series at the GGOS Core Sites

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