[IGSMAIL-62] JPL analysis results
James
James
Fri Aug 7 09:37:50 PDT 1992
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IGS Electronic Mail 7-AUG-1992 09:37:50 Message Number 62
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THIS FILE CONTAINS 5 MESSAGES
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>From: James F. Zumberge
Subject: JPL analysis results
--------------------
Submitted by
G Blewitt, J F Zumberge, M B Heflin, D C Jefferson, F H Webb
all at the Jet Propulsion Laboratory, California Institute of Technology,
Pasadena, CA 91109.
The following files have been posted on BODHI (for access to BODHI contact
starr at logos.jpl.nasa.gov) and will be available soon from the CDDIS:
______________________________________________________________________________
filename contents
______________________________________________________________________________
jpl06547.sum this text file
jpl06535.erp polar motion results for day 1992 Jul 17
jpl06536.erp polar motion results for day 1992 Jul 18
jpl0653x.erp polar motion results for days 1992 Jul 17-18
with new fiducial network (see below)
jpl06547.erp polar motion results for week 1992 Jul 19-25
jpl06535.sp1 precise ephemerides for 1992 Jul 17, sp1 format
jpl06535.sp3 " sp3
jpl06536.sp1 precise ephemerides for 1992 Jul 18, sp1 format
jpl06536.sp3 " sp3
jpl06547.sp1 precise ephemerides for week 1992 Jul 19-25, sp1 format
jpl06547.sp3 " sp3
______________________________________________________________________________
Files jpl0653*, contain the results missing from last week's submission because
of late-appearing data from the DSN. (See special note below regarding file
jpl0653x.erp.)
Starting with this submission, we have changed our fiducial strategy.
Whereas before, we constrained the positions (with 0.1 mm a priori sigmas) of
ALGO, FAIR and MADR using our realization of ITRF90, we now constrain
ALGO, FAIR, MADR, HART, KOKB, SANT, TROM, YAR1 using ITRF91 coordinates.
With the following 2 exceptions, we use the coordinates, site ties, and
antenna height given by Z. Altamimi and C. Boucher in IGS Mail Message #33:
STATION Comment
------- -------
HART Used coordinates for 7232 plus site tie
dx = -817.317 m instead of the quoted dx = -817.371 m.
(We are still not quite sure which of these is correct).
Note that quoted coordinates for "HART" in message #33
implicitly assumed an incorrect antenna height.
SANT Used coordinates as quoted in IGS mail #33 for
"SANT" plus the following tie from SANT to SANTIAGO
GPS #4001 1992 (the current monument upon which the GPS
antenna is mounted):
dx = -31.374 m, dy = -61.808 m, dz = 75.245 m
The ground survey adjustment was performed by
Bendix/GSFC (see also, IGS mail #42). We do not
recommend using the SLR-based position for monument
7400 since it is in ~25 cm disagreement with both GPS
and VLBI solutions.
For completeness, here are the fiducial coordinates we previously assumed,
and the fiducial coordinates we now assume. Please pay careful attention to
the fact that our convention is to use the top of the choke ring as the
ARP (antenna reference point). This is because this convention allows us,
in the absence of other knowledge, to assume a phase center offset of
Dorne-Margolin antenna which is independent of choke ring height (the new
TurboRogue stations will have a different choke ring thickness). We are
aware of the fact that other analysis centers use the bottom of the choke
ring as the ARP, in which case the numbers quoted below must be corrected for
the choke ring thickness (7 cm).
PREVIOUS FIDUCIAL COORDINATES (ITRF90 GPS solution):
-----------------------------
Height to
Site X(m) Y(m) Z(m) Top of Ring(m)
---------------------------------------------------------
ALGO 918129.5841 -4346071.2094 4561977.7947 0.184
FAIR -2281621.3243 -1453595.7491 5756961.9449 0.186
MADR 4849202.5864 -360329.2017 4114913.0940 0.000
---------------------------------------------------------
CURRENT FIDUCIAL COORDINATES (ITRF91, based on IGS Message #33):
----------------------------
Height to
Site X(m) Y(m) Z(m) Top of Ring(m)
---------------------------------------------------------
ALGO 918129.616 -4346071.224 4561977.800 0.184
FAIR -2281621.327 -1453595.775 5756961.976 0.186
MADR 4849202.559 -360329.183 4114913.048 0.000
HART 5084625.458 2670366.499 -2768494.039 9.824
KOKB -5543838.080 -2054587.522 2387809.570 0.163
SANT 1769693.275 -5044574.126 -3468321.172 0.163
TROM 2102940.451 721569.379 5958192.072 2.543
YAR1 -2389025.331 5043316.830 -3078530.926 0.143
---------------------------------------------------------
As before, the assumed phase center offsets from the TOP of the choke ring
for ROGUE Dorne-Margolin antennas are:
Band East [m] North [m] Up [m]
---------------------------------------------
L1 0.0000 0.0000 0.0079
L2 0.0000 0.0000 0.0264
LC 0.0000 0.0000 -0.0207
---------------------------------------------
A check on baselines up to 1700 km show no discernable step-function
in estimated baseline coordinates at the time we started using this new
strategy, so we are confident that this change will not be detrimental to
regional network users. We do, however see a step-function in our polar
motion series at the 1- to 2-milliarcsecond level. For this reason, we quote
polar motion solutions for 2 days in common for both the ITRF90 3-fiducial
strategy, and the ITRF91 8-fiducial strategy.
Thus file jpl0653x.erp contains polar motion results for days 1992 Jul 17-18
with the new ITRF91 8-fiducial strategy, and can be compared with jpl06535.erp
and jpl06536.erp.
The change in strategy causes a ~30-cm 3d rms difference in orbits (determined
by analyzing Jul 17 and Jul 18 with both strategies.)
We have excluded prn12 from the analysis this week because of erratic behaviour.
Also, data from Onsala on Jul 22 and 23 have not been used.
Finally, although tracking data and broadcast epehemeris data have been
received from the newest GPS satellite (prn 26), we have found it best not to
include it yet.
WARNING: For GPS week 654, prn 12 behaved erratically.
WARNING: Data from Onsala are bad on July 22 and 23.
WARNING: We recommend against using prn 26 (yet).
JPL UTPM TABLE 1 (ITRF90 3-fiducial strategy) (1992 Jul 17 - Jul 18)
MJD X Y UT1R-UTC XSIG YSIG UTSIG RMS XYC XUC YUC STA SAT PASS
'' '' sec '' '' sec
48820.5 -.12131 .41754 .00000 .00025 .00029 .00000 .0 .23 .00 .00 24 17 0
48821.5 -.11923 .41880 .00000 .00030 .00035 .00000 .0 .09 .00 .00 25 17 0
END UTPM TABLE 1
JPL UTPM TABLE 2 (ITRF91 8-fiducial strategy) (1992 Jul 17 - Jul 25)
MJD X Y UT1R-UTC XSIG YSIG UTSIG RMS XYC XUC YUC STA SAT PASS
'' '' sec '' '' sec
48820.5 -.12087 .41565 .00000 .00013 .00012 .00000 .0 -.22 .00 .00 24 17 0
48821.5 -.11790 .41740 .00000 .00015 .00012 .00000 .0 -.24 .00 .00 25 17 0
48822.5 -.11567 .42023 .00000 .00014 .00012 .00000 .0 -.17 .00 .00 26 16 0
48823.5 -.11265 .42316 .00000 .00010 .00010 .00000 .0 .01 .00 .00 28 16 0
48824.5 -.11002 .42543 .00000 .00011 .00013 .00000 .0 -.03 .00 .00 26 16 0
48825.5 -.10822 .42738 .00000 .00010 .00012 .00000 .0 -.03 .00 .00 26 16 0
48826.5 -.10640 .42902 .00000 .00011 .00013 .00000 .0 -.10 .00 .00 26 16 0
48827.5 -.10425 .43124 .00000 .00010 .00011 .00000 .0 -.05 .00 .00 27 16 0
48828.5 -.10185 .43336 .00000 .00010 .00011 .00000 .0 .01 .00 .00 26 16 0
END UTPM TABLE 2
The following table indicates the "orbit repeatability", as defined in IGS Mail
Message 37, for GPS week 653 (to complete last week's results):
JPL ORBIT REPEATABILITY TABLE 1 GPS week 653 (1992 Jul 12 - Jul 18)
92 7 12 92 7 13 92 7 14 92 7 15 92 7 16 92 7 17 92 7 18
prn rms (m)
2 0.52 1.12 0.69 1.03 0.90 1.05 1.29
3 0.37 0.53 0.34 0.40 0.45 0.34 0.48
11 0.38 0.48 0.52 0.60 0.40 0.60 0.75
12 0.46 0.88 1.17 0.54 0.57 0.48 0.63
13 0.92 0.63 0.77 0.69 0.43 0.55 0.57
14 1.10 1.23 1.38 0.91 1.52 1.08 1.01
15 0.95 0.70 0.89 0.67 0.77 0.73 0.97
16 0.35 0.45 0.64 0.48 0.34 0.57 0.52
17 0.66 0.87 0.84 0.77 0.81 1.09 0.99
18 0.40 0.55 0.40 0.31 0.29 0.49 0.41
19 0.65 0.57 0.56 0.46 0.42 0.37 0.53
20 0.62 0.73 0.57 0.63 0.42 0.64 0.98
21 0.36 0.45 0.37 0.46 0.53 0.48 0.83
23 0.41 0.53 0.27 0.27 0.54 0.56 0.76
24 0.98 0.9 0.5 0.50 0.72 0.85
25 0.88 1.11 0.4 0.6 0.72 0.52
28 1.36 1.17 1.38 1.08 1.21 1.27 1.22
END ORBIT REPEATABILITY TABLE 1
For GPS week 654 the results are:
JPL ORBIT REPEATABILITY TABLE 2 GPS week 654 (1992 Jul 19 - Jul 25)
92 7 19 92 7 20 92 7 21 92 7 22 92 7 23 92 7 24 92 7 25
prn rms (m)
2 1.30 1.00 1.75 2.00 1.21 1.67 0.75
3 0.43 0.62 0.63 0.72 0.74 0.97 0.62
11 0.49 0.28 0.54 0.56 0.46 0.77 0.76
13 0.35 0.83 0.61 0.95 0.77 0.47 0.66
14 0.52 0.52 0.77 0.85 0.90 1.48 0.89
15 1.11 1.44 1.96 1.71 1.47 1.65 1.68
16 0.38 0.42 0.76 0.46 0.49 0.49 0.76
17 1.00 1.23 0.95 1.15 0.93 0.91 1.38
18 0.58 0.56 0.38 0.64 0.61 0.41 0.77
19 0.99 1.16 0.65 0.75 0.82 0.66 0.52
20 1.05 0.93 1.18 1.24 1.29 1.16 0.94
21 0.58 0.60 0.97 0.95 0.87 0.64 0.86
23 0.62 0.71 0.78 0.53 0.57 0.97 0.77
24 0.76 1.12 0.76 0.60 0.80 1.01 0.92
25 0.93 1.02 0.71 0.61 1.02 0.77 0.84
28 1.21 0.79 1.12 1.16 1.04 0.78 0.70
END ORBIT REPEATABILITY TABLE 2
As described in IGS Mail Message 37, the following tables compares the JPL
precise ephemerides with those from the broadcast ephemeris (included are
results from GPS week 653 and 654):
JPL COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES 1
92 7 12 92 7 13 92 7 14 92 7 15 92 7 16 92 7 17 92 7 18
prn rms (m)
2 6.3 5.6 6.0 6.4 6.3 5.4 5.3
3 11.2 12.6 13.2 12.8 11.3 11.8 13.0
11 5.7 9.0 5.4 6.5 5.1 7.8 6.3
12 12.7 8.0 17.0 13.5 11.6 9.2 12.8
13 5.5 6.1 8.7 7.3 7.9 8.8 7.5
14 5.7 5.9 6.1 6.2 6.4 6.1 6.4
15 6.9 8.9 9.2 8.2 7.4 6.2 8.1
16 8.1 7.4 9.9 10.0 11.8 9.8 8.5
17 7.2 7.0 7.9 8.4 7.7 5.5 7.2
18 7.4 7.2 7.4 7.5 8.1 8.5 7.7
19 8.1 7.3 7.9 8.2 6.6 5.9 6.8
20 4.5 3.7 4.6 4.2 5.0 4.9 5.5
21 6.1 5.9 5.1 5.1 5.7 6.2 7.7
23 5.9 4.9 10.2 7.2 4.4 4.0 11.8
24 15.1 13.4 13.5 12.6 13.3 13.9
25 9.1 9.8 10.5 17.5 10.3 13.5
28 5.3 4.3 4.2 5.0 4.1 4.1 4.4
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES 1
JPL COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES 2
92 7 19 92 7 20 92 7 21 92 7 22 92 7 23 92 7 24 92 7 25
prn rms (m)
2 5.8 6.3 5.8 5.9 6.8 6.7 5.8
3 11.8 11.9 10.7 11.0 11.9 11.2 10.6
11 8.3 12.9 4.7 4.9 6.0 7.6 10.9
13 6.7 6.2 6.5 7.7 5.7 5.8 6.5
14 8.0 6.5 7.2 7.9 6.7 7.0 6.2
15 9.4 5.7 5.2 6.9 8.7 8.1 7.5
16 10.3 9.6 8.9 8.5 7.2 6.5 7.9
17 6.3 5.6 8.0 8.3 8.8 8.3 7.4
18 7.7 6.5 6.5 6.0 5.6 7.4 6.7
19 8.0 7.5 7.2 6.9 4.7 5.5 6.6
20 4.4 5.0 4.5 4.9 6.6 5.8 5.1
21 6.7 5.5 7.1 6.0 6.2 5.9 8.2
23 7.0 6.2 8.4 5.8 9.7 5.4 4.8
24 13.7 11.1 12.0 15.6 13.2 14.1 15.0
25 17.1 7.5 4.8 6.6 6.1 7.4 7.4
28 6.6 4.3 4.3 4.6 4.9 4.4 4.9
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES 2
==============================================================================
>From: Joachim Feltens
Subject: ESA/ESOC analysis results
-------------------------
-------------------------
ANALYSIS CENTRE: ESA/ESOC
-------------------------
OUTLINE OF THE ESTIMATION OF GPS-ORBITS AND EARTH ROTATION PARAMETERS AT THE
ESOC PROCESSING CENTER FOR IGS
J.M.Dow, S.Casotto, J.Feltens, S.Frey, C.Garcia-Martinez, T.Martin-Mur
Description of analysis for period 1992 July 19 - 25 (days 201-207,GPS week 654)
1. SOFTWARE USED: GPSOBS/BAHN5
2. MODELS AND CONSTANTS USED
a) General: no changes with respect to previous runs
b) Satellite Force Model: no changes with respect to previous runs
The following table gives an overview over the satellites that have been
used for the different one-day-arc solutions: "+" used, "-" not used.
__________________________________________________________________________
PRN02| 03| 11| 12| 13| 14| 15| 16| 17| 18| 19| 20| 21| 23| 24| 25| 26| 28|
____-|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
DAY| | | | | | | | | | | | | | | | | | |
201|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | | + |
202|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | | + |
203|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | | + |
204|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | | + |
205|+| + | + | + | + | + | + | + | + | + | + | + | - | + | + | + | - | + |
206|-| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
207|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
c) Ground Stations (if being estimated, one position (X,Y,Z) every day):
The following table gives an overview over the ground stations, that have
been included into the GPS-data processing at ESOC. Except where otherwise
noted ("remarks"), corrections are taken from IGS Mail No. 33 - IGS site
information and coordinates - (Boucher and Altamimi).
__________________________________________________________________________
| | | GPS WEEK 654 |
| | | 2 2 2 2 2 2 2 |
| | | 0 0 0 0 0 0 0 |
SITE | COUNTRY |CODE| 1 2 3 4 5 6 7 | REMARKS
--------------------|-------------|----|---------------------|------------
Algonquin | Canada |ALGO| F F F F F F F |
CANB/Tidbinbilla | Australia |TIDB| -- E ------ E E E | Bern
Penticton | U.S.A. |DRAO| E E E E E E E |
Fairbanks | U.S.A/Alaska|FAIR| F F F F F F F |
Goldstone | U.S.A. |GOLD| E E E E E E E |
Herstmonceux | U.K. |HERS| E F E E F F F |
Kokee Park | U.S.A/Hawaii|KOKB| E E E E E E E |
Kourou (ESA) | French Guyan|KOUR| ------------------- |
Madrid | Spain |MADR| F F F F F F F |
Maspalomas (ESA) | Spain/Can.Is|MASP| E E E E E E E |
Matera | Italy |MATE| -- E E E E E E |
McMurdo | Antarctica |MCMU| E E E E E E E | IGS Mail 44
Metsahovi | Finland |METS| E ----------------- |
Ny Alesund/Spitzb.| Norway |NYAL| -- E E E E E E |
Onsala | Norway |ONSA| E ----------------- |
Pamate/Tahiti | France |PAMA| E E E E E E E | IGS Mail 44
Tai-Shi | Taiwan |TAIW| E E E E E E E | Bern
Usuda | Japan |USUD| -- E E E -------- |
Wettzell | Germany |WETB| E E E E E E E |
Yaragadee | Australia |YAR1| F F F F F F F |
Yellowknife | Canada |YELL| F F F F F F F |
with: "F" ... coordinates of ground station kept fixed,
"E" ... coordinates of ground station estimated,
"-" ... ground station not included on that day.
d) Earth Rotation Parameters: no changes with respect to previous runs
e) Observations: no changes with respect to previous runs
3. PARAMETERS TO BE ESTIMATED PER 1-DAY ARC
a) Satellite Parameters per Spacecraft: no changes with respect to
previous runs
b) Station related parameters per ground station: no changes with respect to
previous runs
c) Earth Rotation Parameters: no changes with respect to
previous runs
4. PARAMETERS TO BE KEPT FIXED IN THE SOLUTION
a) Satellite Parameters per Spacecraft: no changes with respect to
previous runs
b) Station related parameters per Ground Station: no changes with respect to
previous runs
5. PRODUCTS GENERATED
The following products are generated and stored in CDDIS at NASA/GSFC:
ESA06540.EPH - Precise GPS orbits for day 201 (July 19)
ESA06541.EPH - Precise GPS orbits for day 202 (July 20)
ESA06542.EPH - Precise GPS orbits for day 203 (July 21)
ESA06543.EPH - Precise GPS orbits for day 204 (July 22)
ESA06544.EPH - Precise GPS orbits for day 205 (July 23)
ESA06545.EPH - Precise GPS orbits for day 206 (July 24)
ESA06546.EPH - Precise GPS orbits for day 207 (July 25)
ESA06547.ERP - Earth rotation results for week beginning 1992 July 19
ESA06547.SUM - The name of this text file
==============================================================================
>From: Dave Starr
Subject: data rate
---------
Please be advised that the data rate for GOLD was at 120 seconds from
approximately 4 Aug 1992 18:25 to 6 Aug 1992 16:00 UT.
Dave Starr
JPL GPS Network Operations
==============================================================================
>From: Bob E. Schutz
Subject: CSR/UTX analysis results (week 650)
-----------------------------------
IGS ANALYSIS CENTER REPORT
CENTER FOR SPACE RESEARCH/UNIVERSITY OF TEXAS AT AUSTIN
Report Period: 1992 June 21-June27
(Days 173-179, GPS Week 650)
Report Date: 1992 August 3 (Note: this is a revised submission)
This report provides additional information about GPS products generated
by the Center for Space Research/University of Texas at Austin (UTX) for
the International GPS Geodynamics Service (IGS).
PRODUCTS SUMMARIZED
GPS ephemerides and Earth rotation parameters were generated for the
reporting period. The Earth rotation parameters do not currently include
UT1. The results may be obtained from the NASA CDDIS. The currently
available files are:
UTX06507.EPH: GPS ephemerides for GPS Week 650 (revised)
(SP3 format, position only)
UTX06507.SUM: This report file
UTX06507.ERP: Earth rotation summary file
This revised ephemeris file corrects a time tag problem of the original
submission and introduces a new strategy in the ephemeris computation to
be used with future submissions.
CORE STATION SUMMARY
The Core Station data used in the solutions are given below. Missing data
on some days does not imply that no data are available. X in the table
indicates that data from that site were used in the solution.
DATA USED IN SOLUTIONS
Days 173-179
Day of Week 650
S M T W T F S
U O U E H R A
N N E D U I T
Site Code
Algonquin, Ontario Canada ALGO X X X X X X X
Fairbanks, AK USA FAIR X X X X X X X
Hartebeestoek S. Africa HART X X X X X
Kokee Park, HI USA KOKB X X X X
Kootwijk Netherlands KOSG X X X X X X X
Madrid (DS60) Spain MADR X X X X X X X
Mas Palomas (ESOC) Canary I. MASP X X
McMurdo Antarctica MCMU X X X X X X X
Ny Alesund Norway NYAL X X X X X X
Onsala Sweden ONSA X
Papeete Tahiti PAMA X X X X X
Pinyon (PGGA), CA USA PIN1 X X X X X X X
Santiago Chile SANT X X X X X X X
Tai-shi Taiwan TAIS X X X X X X X
Tidbinbilla (DS40) Australia TIDB X X X X X X
Usuda Japan USUD X X X X X X X
Wettzell Germany WETT X X X X X X X
Yaragadee Australia YAR1 X X X X X X X
Yellowknife Canada YELL X X X X X X
Totals 16 16 17 17 15 17 14
SATELLITE SUMMARY
PRN PERCENT TIME COMMENTS
IN SHADOW
2 0.0 Nominal
3 2.4 Nominal
11 2.3 Nominal
12 3.2 Nominal
13 1.8 Nominal
14 0.0 Nominal
15 0.0 Nominal
16 0.0 Nominal
17 0.0 Nominal
18 0.0 Nominal
19 7.2 Nominal
20 0.0 Nominal
21 0.0 Nominal
23 0.0 Nominal
24 0.0 Nominal
25 7.2 Nominal
28 0.0 Nominal
SOLUTION CHARACTERISTICS
Force Model: IERS Standards
Reference Frame: Defined by fixed stations in SLR (CSR91L03) and
VLBI (GLB718)
Software: MSODP1/TEXGAP
Data: L1/L2 GPS phase sampled at 2 min., processed as double differences
Minimum Elevation: 15 degrees
Arc Length:
UTX06507.EPH: Based on 7-day continuous arc, with overlap arc,
described below.
UTX06507.ERP: 1-day arcs
Adjusted Parameters:
6 epoch elements, nongravitational force parameters for each satellite
Zenith delay parameter each 2.5 hr for each station
Double difference bias parameters
Pole position (in one-day arcs)
SOLUTION DETAILS:
UTX06507.EPH (7-day arc):
Passes: 1921
Double differences (DD): 95293
RMS of DD: 1.58 cm (based on the 7-day continuous arc)
Comment: This ephemeris is based on a continuous 7-day arc. However,
to provide a smooth transition between this week and the
next week, a four-day arc spanning the last two days of the
current week and the first two days of the next week is used.
The transition is illustrated below:
Week 650 | Week 651 |
Day -> 0 1 2 3 4 5 6| 0 1 2 3 4 5 6|
|--|--|--|--|--|--|--|--|--|--|--|--|--|--|
|--|--|--|--| 4-day overlap arc
The UTX0607.EPH ephemeris file for Week 650 contains days 0
to 5 of the 7-day continuous arc plus the ephemeris taken from
day 6 of the 4-day overlap arc. For Week 651(and future
ephemerides), days 1 to 5 will come from the continuous 7-day
arc, but day 0 and 6 will be taken from 4-day overlap arcs.
For Week 650, a discontinuity exists at June 27 00:00
with the values given below (DX,DY,DZ represent ephemeris
differences in the Earth-fixed frame and DR,DT,DN represents
the same differences expressed in a radial, transverse
(along-track) and normal (cross-track) reference frame.
This is the only discontinuity that exists in UTX06507.EPH.
There is no discontinuity at the common point between Week 650
and Week 651.
Ephemeris Difference: 1992 6 27 0 0 0.0000000
PRN DX(m) DY(m) DZ(m) DR(m) DT(m) DN(m)
2 -0.1800 0.9000 -0.1100 -0.1066 0.7762 -0.4906
3 0.0400 -0.4100 0.0000 -0.0404 0.1568 -0.3788
11 -0.0100 -0.0800 -0.0200 -0.0279 -0.0401 -0.0671
12 0.3000 0.1100 -0.3700 -0.0922 0.4728 0.0837
13 -0.2000 -0.4000 -0.4000 0.0062 0.4254 -0.4231
14 -0.2600 -0.0100 0.4600 0.0105 -0.4383 0.2951
15 0.2400 0.1200 0.2800 0.0267 -0.3789 0.0784
16 0.0000 0.0400 0.1700 0.0372 0.1664 0.0378
17 -0.0200 0.2100 -0.1400 -0.0255 -0.1590 0.1954
18 0.0200 -0.2400 0.0100 0.0135 -0.1757 0.1645
19 0.0900 -0.0400 -0.6200 0.0232 -0.6273 -0.0090
20 0.3400 -0.1800 0.1900 -0.0040 -0.0762 0.4222
21 0.2000 0.1900 -0.1900 0.0978 -0.2280 -0.2250
23 0.0000 0.1800 -0.1900 0.0856 -0.2473 -0.0039
24 0.0900 -0.3200 -0.2400 -0.0046 0.0687 -0.4042
25 -0.0600 -0.5000 0.0300 -0.0901 0.1231 0.4808
28 0.5300 0.0000 -0.2600 -0.1613 -0.3887 0.4140
The one day arcs used for the Earth rotation solutions have the following
characteristics:
UTX06507.ERP:
Day-> 0 1 2 3 4 5 6
Passes: 275 275 308 249 247 282 286
Double differences (DD): 13758 13179 15621 11710 11545 14294 15144
RMS of DD (cm): 2.1 2.1 1.7 1.9 1.4 1.7 1.4
[Day 0=Sunday; Day 6=Saturday)
----------------------------
For further information:
Prof. B. E. Schutz
schutz at utcsr.ae.utexas.edu
or Dr. P. A. M Abusali
abusali at utcsr.ae.utexas.edu
==============================================================================
>From: Bob E. Schutz
Subject: CSR/UTX analysis results (week 651)
-----------------------------------
IGS ANALYSIS CENTER REPORT
CENTER FOR SPACE RESEARCH/UNIVERSITY OF TEXAS AT AUSTIN
Report Period: 1992 June 28-July 4
(Days 180-186, GPS Week 651)
Report Date: 1992 August 5
This report provides additional information about GPS products generated
by the Center for Space Research/University of Texas at Austin (UTX) for
the International GPS Geodynamics Service (IGS).
PRODUCTS SUMMARIZED
GPS ephemerides and Earth rotation parameters were generated for the
reporting period. The Earth rotation parameters do not currently include
UT1. The results may be obtained from the NASA CDDIS. The currently
available files are:
UTX06517.EPH: GPS ephemerides for GPS Week 651 (SP3 format)
UTX06517.SUM: This report file
UTX06517.ERP: Earth rotation summary file
CORE STATION SUMMARY
The Core Station data used in the solutions is given below. Missing data
on some days does not imply that no data are available. X in the table
indicates that data from that site were used in the solution.
DATA USED IN SOLUTIONS
Days 180-186
Day of Week 651
S M T W T F S
U O U E H R A
N N E D U I T
Site Code
Algonquin, Ontario Canada ALGO X X X X X X X
Fairbanks, AK USA FAIR X X X X X X X
Hartebeestoek S. Africa HART X X X X X X X
Kokee Park, HI USA KOKB X X X X X X
Kootwijk Netherlands KOSG X X X X X X X
Madrid (DS60) Spain MADR X X X X X
Mas Palomas (ESOC) Canary I. MASP X X X X X X X
McMurdo Antarctica MCMU X X X X X
Ny Alesund Norway NYAL X X X X X X X
Onsala Sweden ONSA X X X X X X X
Papeete Tahiti PAMA X X X X X X
Pinyon (PGGA), CA USA PINY X X X X X X X
Santiago Chile SANT X X X X X X
St. Johns, Newfoundland Canada STJO X X X X X X X
Tai-shi Taiwan TAIW X X X X X X X
Tidbinbilla (DS40) Australia TIDB X X X X X X X
Usuda Japan USUD X X X X X X X
Wettzell Germany WETT X X X X X X X
Yaragadee Australia YAR1 X X X X X X X
Yellowknife Canada YELL X X X X X X X
Totals 19 19 19 19 20 19 18
SATELLITE SUMMARY
PRN PERCENT TIME COMMENTS
IN SHADOW
2 0.0 Nominal
3 0.0 Nominal
11 0.0 Nominal
12 6.6 1-day arcs indicate prn12 problem on day186
but no significant evidence for this in 7-day arc
13 0.0 Nominal
14 0.0 Nominal
15 0.0 Nominal
16 0.0 Nominal
17 0.0 Nominal
18 0.0 Nominal
19 5.5 Nominal
20 0.0 Nominal
21 0.0 Nominal
23 0.0 Nominal
24 0.0 Nominal
25 5.7 Nominal
28 0.0 Nominal
SOLUTION CHARACTERISTICS
Force Model: IERS Standards
Reference Frame: Defined by fixed stations in SLR (CSR91L03) and
VLBI (GLB718)
Software: MSODP1/TEXGAP
Data: L1/L2 GPS phase sampled at 2 min., processed as double differences
Minimum Elevation: 15 degrees
Arc Length:
UTX06517.EPH: 7-day continuous arc
UTX06517.ERP: 1-day arcs
Adjusted Parameters:
6 epoch elements, nongravitational force parameters for each satellite
Zenith delay parameter each 2.5 hr for each station
Double difference bias parameters
Pole position (in one-day arcs)
Solution Statistics:
UTX06517.EPH (7-day arc):
Passes: 2641
Double differences (DD): 131744
RMS of DD: 1.82 cm
Comment: This ephemeris is based on a continuous 7-day arc. As
described in the report for Week 650, the first day and
the last day of the continuous 7-day arc were removed and
replaced by the corresponding days from 4-day arcs that
spanned Weeks 650/651 and Weeks 651/652, respectively.
Discontinuities are introduced with this strategy at
June 29 00:00 and July 4 00:00. The discontinuity values
are give in the tables below.
Ephemeris Difference: 1992 6 29 0 0 0.0000000
PRN DX(m) DY(m) DZ(m) DR(m) DT(m) DN(m)
2 0.3800 -0.0300 0.1800 0.0799 0.1375 0.3904
3 -0.0600 0.1400 -0.0900 -0.0242 -0.1497 0.0911
11 0.3100 0.2600 -0.1200 0.1734 -0.1542 0.3525
12 -0.1600 -0.0300 -0.1500 0.1958 0.0475 -0.0917
13 -0.0600 0.1700 -0.0500 -0.1553 0.0267 0.1009
14 -0.2900 0.0600 0.0900 -0.0664 -0.0702 0.2941
15 0.2800 0.0200 0.1100 0.0804 -0.2831 -0.0655
16 -0.1000 -0.0400 -0.1600 -0.0480 -0.1783 0.0558
17 -0.0600 0.4600 -0.2000 -0.0587 -0.2386 0.4414
18 -0.1000 0.0400 0.0100 -0.0543 0.0876 0.0328
19 0.1000 -0.0600 -0.2000 0.0511 -0.2182 0.0581
20 0.2000 -0.1500 0.3100 0.1283 -0.1846 0.3287
21 -0.1000 0.0700 0.2000 -0.0947 -0.0306 0.2121
23 -0.1300 0.1400 0.2500 -0.1390 0.0607 0.2757
24 -0.1600 0.0800 -0.0300 -0.1170 -0.1289 0.0512
25 -0.1200 -0.0100 -0.1000 0.0311 0.1531 -0.0088
28 0.8600 0.3400 -0.1900 -0.0678 -0.3236 0.8843
Ephemeris Difference: 1992 7 4 0 0 0.0000000
PRN DX(m) DY(m) DZ(m) DR(m) DT(m) DN(m)
2 0.4800 -0.5600 0.0100 0.2653 -0.2821 0.6278
3 0.6000 0.1700 0.5600 0.1012 0.6132 0.5624
11 0.4900 -0.1000 -0.3800 0.0269 -0.5745 0.2524
12 1.0600 0.0300 -0.5300 -0.2716 1.0490 0.4810
13 0.1500 0.0400 -0.3300 0.1082 0.3183 0.1413
14 0.0100 -0.0200 0.3500 0.0276 -0.3492 0.0176
15 0.5600 -0.1700 0.1700 0.0038 -0.5575 -0.2461
16 0.2500 -0.2600 -0.5800 -0.1073 -0.4996 -0.4532
17 -0.1900 0.1000 0.1700 0.1831 0.1256 0.1603
18 -0.0500 0.3400 0.0000 0.0293 0.3084 -0.1487
19 -0.0900 0.0000 0.3000 0.0024 0.3121 0.0266
20 0.3100 -0.2400 0.3000 0.0796 -0.1967 0.4457
21 0.6400 -0.7500 -0.5000 -0.0428 0.3045 -1.0619
23 0.2300 0.5200 -0.3300 -0.1773 -0.6318 0.0403
24 -0.3400 -0.2200 0.0600 -0.0014 -0.3486 -0.2147
25 0.8000 0.3900 0.3200 -0.4233 -0.7250 -0.4355
28 -0.4800 -0.4000 -0.6400 -0.0370 -0.5930 -0.6686
The independent one day arcs used for the Earth rotation solutions have
the characteristics given below:
UTX06517.ERP
Day-> 0 1 2 3 4 5 6
Passes: 350 371 398 382 392 392 350*
Double differences (DD): 17178 18652 18863 19573 19320 19176 18954*
RMS of DD (cm): 1.4 1.5 1.9 1.9 2.1 2.2 2.3*
[Day 0=Sunday; Day 6=Saturday)
All satellites included for each day
*The reported Earth rotation solution excluded PRN12; without PRN12
the RMS is 1.77 cm with 302 passes. PRN12 is included in ephemeris
file.
----------------------------
For further information:
Prof. B. E. Schutz
schutz at utcsr.ae.utexas.edu
or Dr. P. A. M Abusali
abusali at utcsr.ae.utexas.edu
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