[IGSREPORT-4247] Wk 0926 COD Analysis Report
M.
M.
Fri Oct 17 07:14:56 PDT 1997
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IGS Electronic Report Fri Oct 17 7:14:56 PDT 1997 Message Number 4247
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Author: M. Rothacher
Subject: Wk 0926 COD Analysis Report
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CODE ANALYSIS REPORT GPS WEEK 0926 (DAYS 278-284, DATES 05-10-97 - 11-10-97)
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Submitted by: Astronomical Institute, University of Berne, Switzerland
Products available through anonymous ftp using:
ftp ubeclu.unibe.ch -or- ftp 130.92.6.11
after login: cd aiub$ftp; cd code
FILES SENT TO CDDIS:
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COD09267.SUM THIS TEXT FILE
COD09267.ERP GPS DAILY EARTH ROTATION ESTIMATES, IGS FORMAT
COD0926N.EPH GPS DAILY SATELLITE EPHEMERIDES, SP3 FORMAT (N=0..6)
COD09267.SNX_Z GPS WEEKLY COORDINATE SOLUTION, SINEX FORMAT
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COD0926N.TRO GPS DAILY TROPOSPHERE ESTIMATES, SINEX FORMAT (N=0..6)
(SEND TO GFZ ONLY)
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THREE DAY SOLUTION STATISTICS:
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MIDDLE DAY FILES OBSERVATIONS PARAMETERS RMS (MM)
------------------------------------------------------
278 266 511825 13429 1.5
279 264 506542 12534 1.5
280 259 499909 11354 1.5
281 265 499464 11908 1.5
282 264 487371 12415 1.5
283 273 495311 13413 1.5
284 281 511630 13247 1.5
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SINEX WEEKLY STATISTIC:
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281 1872 3512052 86869 1.5
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REFERENCE CLOCKS:
---------------------------------------------------------
DAY: 278 NUSN used as reference clock
DAY: 279 NUSN used as reference clock
DAY: 280 NUSN used as reference clock
DAY: 281 NUSN used as reference clock
DAY: 282 NUSN used as reference clock
DAY: 283 NALG used as reference clock
DAY: 284 NALG used as reference clock
---------------------------------------------------------
ORBIT REPEATABILITY (CM) FOR PRN: (-- = NOT INCLUDED)
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1 2 3 4 5 6 7 9E10 13 14 15 16 17 18 19E21 22 23 24 25E26 27E29 30 31
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278 6 5 5 5 4 4 4 10 4 6 14 5 66 6 31 7 7 5 10 4 4 4 7497 5 4
279 4 4 4 4 4 3 3 5 5 4 9 10134 6 33 6 3 3 7 2 2 3 4170 4 3
280 5 4 4 4 3 3 3 5 4 5 7 4 58 6 24 6 6 4 10 3 4 3 4137 4 3
281 5 5 4 5 4 3 4 6 4 5 12 8 68 9 33 6 4 4 9 4 4 4 4113 5 3
282 4 5 3 4 4 3 3 5 3 5 19 7 31 5 42 4 4 5 12 3 3 3 4 66 5 3
283 5 4 3 3 3 3 4 4 4 4 23 8 57 6 57 6 6 4 9 3 4 3 3101 4 3
284 5 7 4 5 5 3 5 5 5 6 58 7 46 7178 7 6 6 10 4 6 5 5 99 6 4
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ALL 5 5 4 4 4 3 4 6 4 5 26 7 73 7 76 6 5 5 10 3 4 4 5218 4 3
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WEEKLY COORDINATE COMPARISON OF 1-DAY (G1) SOLUTIONS
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TOTAL NUMBER OF STATIONS: 84
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WEEKDAY RESIDUAL RMS IN MM
STATION #DAYS 0123456 N E U
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ALBH 40129M003 7 PPPPPPP 3 4 4
ALGO 40104M002 7 PPPPPPP - - - FIXED
ANKR 20805M002 4 PP PP 5 4 4
AREQ 42202M005B 7 PPPPPPP 7 15 11
ASC1 7 PPPPPPP 7 19 30
AUCK 50209M001 7 PPPPPPP 5 3 13
BAHR 249010M02 7 PPPPPPP 7 8 10
BOR1 12205M002 7 PPPPPPP 2 4 7
BRAZ 41606M001 5 PPP P P 10 17 11
BRUS 13101M004 7 PPPPPPP 2 4 5
CHAT 50207M001 7 PPPPPPP 7 5 8
CHUR 7 PPPPPPP 2 2 7
COCO 1 P - - -
CRO1 43201M001 7 PPPPPPP 5 8 8
DGAR 2 P P 14 4 32
DRAO 40105M002 7 PPPPPPP 3 3 5
ELAT 7 PPPPPPP 6 6 15
FAIR 40408M001B 7 PPPPPPP - - - FIXED
FLIN B 7 PPPPPPP 2 3 8
FORT 41602M001 7 PPPPPPP 8 13 16
GODE 40451M123 7 PPPPPPP 2 2 7
GOLD 40405S031 7 PPPPPPP - - - FIXED
GOPE 11502M002 5 P PPPP 2 4 3
GRAS 10002M006B 6 P PPPPP 2 3 4
GRAZ 11001M002B 7 PPPPPPP 2 3 5
GUAM 50501M002 7 PPPPPPP 9 18 17
HOB2 50116M004 1 P - - -
IISC 22306M001B 4 P PPP 10 10 20
IRKT 12313M001 6 PPPPP P 9 12 6
JOZE 12204M001 7 PPPPPPP 2 4 6
KATZ 6 PPPP PP 6 6 10
KERG 91201M002 6 PPP PPP 9 17 21
KIRU 10403M002 7 PPPPPPP 2 2 5
KIT3 12334M001 6 PP PPPP 10 10 6
KOKB 40424M004 7 PPPPPPP - - - FIXED
KOSG 13504M003 7 PPPPPPP - - - FIXED
KOUR 97301M210B 5 PPPPP 3 2 10
KSTU 12349M002 6 PPPPP P 10 12 7
KWJ1 7 PPPPPPP 10 10 31
LAMA 12209M001 6 PPPPPP 2 3 8
LHAS 21613M001 7 PPPPPPP 10 9 9
LPGS 41510M001 7 PPPPPPP 8 12 14
MALI 33201M001 7 PPPPPPP 8 9 20
MASP 31303M002C 7 PPPPPPP 4 5 15
MATE 12734M008B 7 PPPPPPP 2 4 9
MCM4 66001M003 7 PPPPPPP 11 10 16
MDO1 40442M012 7 PPPPPPP 3 6 10
MDVO 12309M002 7 PPPPPPP 4 6 15
METS 10503S011 7 PPPPPPP 3 4 8
MKEA 7 PPPPPPP 2 6 9
MONP 40497M004 7 PPPPPPP 4 5 3
NICO 14302M001 6 PPPPP P 5 3 6
NLIB 40465M001 7 PPPPPPP 1 3 6
NTUS 22601M001 4 PP PP 16 12 11
ONSA 10402M004 5 PPP PP 2 4 8
PERT 50133M001 7 PPPPPPP 3 11 8
PIE1 40456M001 7 PPPPPPP 2 4 12
POL2 12348M001 4 P PP P 7 9 8
POTS 14106M003 7 PPPPPPP 1 3 5
REYK 10202M001 7 PPPPPPP 2 4 9
RICH 40499S018C 7 PPPPPPP 5 7 19
SANT 41705M003B 5 PPPPP - - - FIXED
SHAO 21605M002 3 P PP 5 14 4
STJO 40101M001B 7 PPPPPPP 1 5 9
TAEJ 23902M001B 7 PPPPPPP 7 10 11
TAHI 92201M006 6 P PPPPP 5 16 9
TAIW 23601M001 2 P P 4 16 5
TELA 7 PPPPPPP 6 5 10
THU1 43001M001 7 PPPPPPP 3 2 5
TIDB 50103M108C 7 PPPPPPP - - - FIXED
TSKB 21730S005 7 PPPPPPP 8 9 13
UPAD 12750M002 4 PPPP 2 2 3
USNO 40451S003 7 PPPPPPP 1 2 11
USUD 21729S007 7 PPPPPPP 8 11 20
VILL 13406M001 7 PPPPPPP 2 3 11
WES2 40440S020 7 PPPPPPP 2 4 4
WHIT 7 PPPPPPP 2 2 5
WSRT 13506M005 7 PPPPPPP 2 1 3
WTZR 14201M010 7 PPPPPPP - - - FIXED
WUHN 21602M001 7 PPPPPPP 11 11 7
XIAN 7 PPPPPPP 10 10 7
YAR1 50107M004B 6 PPP PPP 3 11 8
YELL 40127M003B 7 PPPPPPP - - - FIXED
ZIMM 14001M004 7 PPPPPPP 2 5 6
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# Coordinate Estimates: 464 5 8 11
REMARKS: Day 278: Modeling problems for PRN 29
Day 279: Modeling problems for PRNs 14, 29
Day 280: Modeling problems for PRN 16
Day 284: Modeling problems for PRNs 14, 18
Processing changes (last changes week 0873, see IGSREPORT.3056)
===============================================================
Starting with GPS week 0926 the CODE Analysis Center has made essential
changes to its routine processing:
1) The elevation cut-off was changed from 20 to 10 degrees.
2) An elevation-dependent weighting of the observations is applied
(1/cos(zenith)**2).
3) The Niell mapping function (dry) is used to map the tropospheric
zenith delays
4) We adopted the solid Earth tide model as given in the IERS 1996
conventions. Only ocean loading is not yet applied.
Observed changes in the orbit and EOPs
--------------------------------------
orbit EOPs
-----------------------------------
rot x. 0.03 mas x: 0.06 mas
rot y. -0.07 mas y: 0.02 mas
rot z. -0.01 mas ut: 0.01 us/day
tra z. 3 mm
-----------------------------------
>From the above table we conclude that there are no significant systematic
changes in both our orbit and EOP estimates.
For the station coordinates we see the following relatively large changes:
- scale decreased by 0.8 ppb. This is caused mainly by the change of the
tropospheric mapping function.
It must be noted that the change in cut-off elevation (20 to 10 degrees)
changes the scale significantly but the elevation-dependent weighting
counteracts this effect.
- repeatability of the coordinates improves significantly,
especially the height component.
- Unfortunately some station coordinates will show a jump in our time-series!
This is, in our opinion, mainly caused by multipath and antenna phase
center variations. This means that those stations for which we see a
jump are probably in a bad multipath environment or have a very different
antenna setup. For the following stations we see a systematic
change in the coordinates larger than 15 mm (the values in brackets are
the observed systematic height changes):
MDVO (+30), TAIW (-20), IRKT (+25), MCMU (-20)
It should be noted that MDVO has a "special" antenna without a ground
plane. So it is very likely to have strong multipath effects. Furthermore
we have no antenna phase center variations for this antenna which will
cause a bias as well.
See IGSMAIL.1705 for more information about these changes!
Note that the "RMS" values as given in our weekly summary reports
now refer to the noise of a "one-way L1 phase observation (at zenith)"
global: ALBH ALGO ANKR AREQ ASC1 AUCK BOR1 BOGT BRAZ BRMU BRUS CAS1 CHAT CRO1
global: DAV1 DRAO EISL FAIR FORT GODE GOLD GOPE GRAS GRAZ GUAM HART HRAO HOB2
global: IISC IRKT JOZE KERG KIT3 KOKB KOSG KWJ1 LAMA LHAS LPGS MAC1 MALI MAS1
global: MATE MCM4 MDO1 MDVO METS MOIN MONP NYAL NLIB OHIG ONSA PAMA PERT PIE1
global: POL2 POTS QUIN RCM5 REYK SANT SEY1 SHAO STJO TAHI TAIW TIDB TAEJ THU1
global: TSKB UPAD USUD WTZR YAR1 YELL WES2 ZIMM COCO CHUR FLIN WHIT BAHR WUHN
global: MKEA DGAR XIAN VILL ZWEN KSTU WSRT USNO NTUS KIRU NICO KOUR
[Mailed From: MARKUS ROTHACHER <ROTHACHER at aiub.unibe.ch>]
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