IGS Analysis Center Workshop - IGS - NASA

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Y– differences with IERS1 1 I0,001”CODE,. . . . . . ., *...*.. .*.. *.*.,~..*”” ,. ..*,.. :*,,8-””*.. *.. . . ● ,. :‘** ..*.*”““”n.”*. ,.*.*.. * ‘*EMRt.*. .*...*””” ““B..”*”-*-*., *.. *.. *...* . ..+.. *...*GFZ,,..0.*.. .U ● ..*.. *.. *.. . . . . .. . . . . . ..*” *... *J ““.*..”’ .“V ..* . . .;. %.. .*,:“*”.~.*;. ,.*.,* %. I., ..b..*.-...“*8-*...*...*...*,*.” ..,..4JPL,..*...* ..*,,. *.. *... *...*..*● ✎✎ ✎ ✎ ✎ ✎● ...*.””●.*b-.”s, . . .* . ..*.. *.. *...*..&* Slo.. ... .● ✎ ✎ ✎✎✎☛● ✎✎✎ .,..* ....4.. *...*” “$.. ● ’ *.. *.. *NOAA,.*. -.*., .*.,..*. ● ● ✌✌✎ ☛✎✎✎☛. . . . ..*...-”✎☛✌✌✎ ✎‘.*● ✎ ✎ ✎ ●● ✌✎✎ ✎ ✎✍●✎✎☛L.. *. . .*... *.. .*... *.“*.’ .“*,‘“*I I 11992 1992.5 1993 1993.597Date (years)
SUMMARY OF SESSION 5In the last session, three additional presentations were given.In the first presentation, Dr. Martine Feissel highlighted the IERS studies of the IGS pole solutionswith particular emphases on the long term stability. It was noted that some GPS polar motion seriesexhibited drifts of several mas/year demonstrating the importance of VLBI. Also summarized werenew developments and improvements in precession and nutation models supported by VLBIobservations.In the second presentation given by Dr. Feissel on behalf of Boucher and Altamimi, the latest ITRFsolutions and coordinate sets were reviewed. The significance of the IERS/ITRF effort, whichprovides a common reference frame and connection to other space technique such as VLBI/SLRhas been greatly appreciated and acknowledged by all participants. The plans to make the ITRFand EOP mutually consistent at the sub-mas level for the 1993 Annual Report were alsohighlighted. This will mean a small re-alignment of the ITRF reference frame to maintain thecontinuity of EOP.In the last presentation, an interesting application of GPS with emphasis on the post-glacial upliftin Fennoscandia was presented. GPS data from the IGS core network, supplemented by anextensive regional network are being processed using a state of the art software (GIPSY II). Thisyielded a repeatability of a few ppb in distance for baselines of a few thousand km. Practically thesame results were obtained with the best IGS orbits held fixed or with orbits determined from bothregional and global (IGS) networks. Dr. Johansson expressed interest in using the future combinedIGS orbits and also to become an IGS Associated Analysis Center...98
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●INTERNATIONAL ASSOCIATION OF GEO
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TABLE OF CONTENTS.FINAL AGENDA . .
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13:30 NGS14:00 S1014:30 EMR15:00 CO
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LIST OF PARTICIPANTS:Prof. Gerhard
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Table 1. Current IGS Analysis Cente
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The first field identifies the reco
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Summary InformationThe third produc
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From Figure 1 we find that there ar
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to define a reference clock in thei
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SESSION 2(IGS orbit products)
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1. introductionThe main objectives
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ecause of the above averaging. This
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RMS per center (m)o 0 0 0 0 0 oA0Iv
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Scale (ppb)I I I I I 11+-b~ul0Amo&I
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and NGS. Note that the day to day v
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Rotation around X-axis (mas)1&0 0o
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discussed in Section 3 are here see
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-----------------------------------
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Residuals in Meters1 1 1 1 1 1 1=%m
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Residuals inMeters11111cnficJJw-o A
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I I I—Residuals in Meters..—.
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1111ResidualsMeters,—{44
Page 49 and 50: Residuals in MetersI I I II I I IIc
Page 51 and 52: Rms in MetersI 1 ! I 1 10 n0 a0n.ff
Page 53 and 54: IGS- and the COM-sets, but that the
Page 55 and 56: Table 4.1 N.A. Baseline Repeatabili
Page 57 and 58: ..Figure 5.1:Clock solutions for FA
Page 59 and 60: specifically the preanalysis can be
Page 61 and 62: discussion, a question as to whethe
Page 63 and 64: SUMMARY OF SESSION 3This Session be
Page 65 and 66: IGS POSITION PAPER, IGS ANALYSIS CE
Page 67 and 68: and Earth orientation parameters (E
Page 69 and 70: LbPIERS and IGSCentral Bureausand D
Page 71 and 72: @ IGS will develop instructions, an
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Page 76 and 77: applied to the solution in order to
Page 78 and 79: ..standard deviations. This is conv
Page 80 and 81: known, the two solutions will be ad
Page 82 and 83: errors, and can therefore be used a
Page 84 and 85: International Terrestrial Reference
Page 86 and 87: Thus, there is the potential of fee
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Page 91 and 92: adiation parameters for each satell
Page 93 and 94: Bock, Y., R.I. Abbot, C.C. Counselm
Page 95 and 96: SUMMARY OF SESSION 4This session st
Page 97 and 98: INTERNATIONAL EARTH ROTATION SERVIC
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Page 107 and 108: ..INTERNATIONAL GPS SERVICE FORGEOD
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Page 113 and 114: . Ruth Neilan16S Central BureauJet
Page 115 and 116: ON1T.>● Jim ZumbergeJet Propulsio
Page 117: PROPOSED ORGANIZATION OF THE INTERN
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IGS Analysis Center Workshop - IGS - NASA

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