[IGSMAIL-40] Antenna Heights TROM & NYAL
George
George
Fri Jul 10 11:55:59 PDT 1992
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IGS Electronic Mail 10-JUL-1992 19:13:12 Message Number 40
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THIS FILE CONTAINS 3 MESSAGES
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>From: George Preiss
Subject: Antenna Heights TROM & NYAL
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Dated: 1126 UTC, Fri Jul 10 1992 My reference: E107/92
*** Please quote my reference in replies ***
ANTENNA HEIGHTS - TROMSO AND NY ALESUND
We confirm that the antenna height at TROM has not been changed. Something as
yet unidentified happened in the downloading and file transfer processing to
suddenly give a 0.000 metres height for day 175.
For NYAL, we confirm that the antenna height is 5.203 metres, and checked and
confirmed.
Regards
George Preiss
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>From: Chris Reigber
Subject: Analysis results from GFZ
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1. Analysis Center: GFZ/DLR
2. Solution Identifier: EPH(GFZ)92G01-DDD
ERP(GFZ)92G01-DDD
CLK(GFZ)92G01-DDD (only relative)
3. Software used: GEPARD4.0
4. Defintion of Terrestrial Reference Frame
Origin: Nominally ITRF-90
Orientation: Nominally ITRF-90
Reference Epoch: 1992.352 (MJD 48750)
Fixed set of stations: Y. Bock Solution (IGS Message No.35)
ALGO, YELL, FAIR, KOKR, TROM, WEZ1, YAR1, USUD, NALL
5. Data used:
- undifferenced pseudo ranges and carrier phases
- 2-day arc solutions with one day overlap
6. Adjusted parameters:
- State vector of all GPS satellites
- Daily polar motion
- Coordinate corrections for non-fixed stations
- Troposheric zenith path delay
- Solar radiation scale and y-bias
- Ambiguities
- ST and SV clock parameters of each observation epoch (the
maser-based clock at Fairbanks is taken as reference clock)
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Identification of IGS product files submitted by GFZ:
(the naming convention is equal to IGS Message No.16)
cccwwwwd.ttt
with ccc: GFZ
wwww: Gps week number (e.g. 0650)
d: Day of the week
ttt: File type
ERP: Earth Rotation Parameters
EPH: Precise Ephemerides
CLK: Satellite clocks (relative)
- GFZ06502.EPH
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The precise ephemerides contains GPS satellite state vectors
as a function of time (every 5 minutes) in the ITRF90
coordinate system; their reference time is consistent with
GPS time. The ephemerides are given in the NGS sp3 format
which contains tabulated positions and velocities beginning
at 0 h 0 m 0.0 sec each day. The ephemerides files are available
at CDDIS, IGN and IfAG.
First results for the quality of the calculated orbits are listed
below. For the day 174 the overlap rms differences [cm] in radial,
cross- and along-track component are presented.
SV 2 3 11 12 13 14 15 16 17 18 19 20 21 23 24 25 28
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radial 63 26 65 90 17 20 38 30 18 53 35 17 26 23 32 40 92
cross 52 67 94 61 43 37 36 36 55 58 51 56 52 57 32 95 48
along 129 80 194 115 60 64 72 70 51 71 67 34 53 51 96 86 155
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>From: Dennis McCarthy
Subject: Preliminary look at GPS Earth orientation
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Date: 10 July 1992
An updated look at Earth orientation data submitted to the IERS
follows. Units are milliseconds of arc for x and y, and
milliseconds of time for UT1-UTC.
Contributor Data Span Points Mean Standard Deviation
(NEOS-GPS)
x y UT1-UTC x y UT1-UTC
U. of Texas 48794.5 7 -0.55 0.34 0.43 1.85
-48800.5
Scripps 48781.0 19 -0.09 1.40 1.46 1.03
-48799.0
U. of Berne 48792.5 8 0.04 0.37 -1.51 2.03 1.77 0.14
-48800.5
JPL 48794.5 7 0.02 -0.04 0.66 1.72
-48800.5
Plots are available by FAX to anyone interested.
Regards,
Dennis McCarthy
dmc at maia.usno.navy.mil
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