[IGSMAIL-108] esa06627.sum
Joachim
Joachim
Tue Sep 29 17:14:38 PDT 1992
***********************************************************************
IGS Electronic Mail 29-SEP-1992 17:14:38 Message Number 108
***********************************************************************
==============================================================================
THIS FILE CONTAINS 5 MESSAGES
==============================================================================
^From: Joachim Feltens
Subject: esa06627.sum
-------------
-------------------------
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 September 13 - 19
*******************************************************************************
During the weekends of days 256 to 258 (Sept. 12 - 14) and of days 263 to 265
(Sept. 19 - 21) anti-spoofing has been switched on. Nevertheless data of all
18 satellites has been processed, and the orbits of all GPS-spacecrafts have
been improved.
*******************************************************************************
Beginning with August 18 (day 231, 9th week), we are evaluating 30-hour-arcs,
starting 3 hours before the beginning of the considered day and ending 3 hours
after the end of the considered day. In this way we are getting an overlap of
6 hours between two successive days:
21h 0h 24h 3h
|--3hours--|---------24hours---------|--3hours--|
|--3hours--|---------24hours---------|--3hours--|
21h 0h 24h 3h
From such a 30-hour-arc, the part covering 0h to 23h45m is sent to CDDIS, as
usual.
*******************************************************************************
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| | | | | | | | | | | | | | | | | | |
257|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
258|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
259|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
260|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
261|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
262|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
263|+| + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + |
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. 90 - IGS site
information and coordinates,updated version of IERS/IGS Tables in IGS Mail
No. 65 - (Boucher and Altamimi).
__________________________________________________________________________
| | | GPS WEEK 662 |
| | | 2 2 2 2 2 2 2 |
| | | 5 5 5 6 6 6 6 |
SITE | COUNTRY |CODE| 7 8 9 0 1 2 3 | REMARKS
--------------------|-------------|----|---------------------|------------
Algonquin | Canada |ALGO| F F ------ F F F |
CANB/Tidbinbilla | Australia |TIDB| e e e e e e e |
Penticton | Canada |DRAO| F F F F F F F |
Fairbanks | U.S.A/Alaska|FAIR| F F F F F F F |
Goldstone | U.S.A. |GOLD| F F F F F F F |
Hartebeesthoek | South Africa|HART| F F F F F F F |
Herstmonceux | U.K. |HERS| F ------ F F F F |
Kokee Park | U.S.A/Hawaii|KOKB| --------------------|
Kourou (ESA) | French Guyan|KOUR| ------------------- | own estim.
Madrid | Spain |MADR| F F F F F F F |
Maspalomas (ESA) | Spain/Can.Is|MASP| e ------ e e e e |
Matera | Italy |MATE| F F F F F F F |
McMurdo | Antarctica |MCMU| e e e e e e e |
Metsahovi | Finland |METS| -- F F F F F F |
Ny Alesund/Spitzb.| Norway |NYAL| e e e e e e -- |
Onsala | Sweden |ONSA| F F F F F F F |
Pamate/Tahiti | France |PAMA| -- e e e e ----- |
St.Johns, NF | Canada |STJO| ----- e e ------ e |
Santiago | Chile |SANT| F F F F F F F |
Tai-Shi | Taiwan |TAIW| ----- e e e e -- |
Usuda | Japan |USUD| e e e e e e e |
Wettzell | Germany |WETT| F F F F F F -- |
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.
For Kokee Park we had no GPS-data during the whole 13th week.
Since we had no data for Algonquin on days 259 and 260, we included
St.Johns (Newfoundland) in our set of ground stations. We try to keep
St.Johns in the future, independently whether or not we have Algonqiun-
data.
The swedish station Onsala we will keep fixed in the future.
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:
From week 661 on, the satellite clock drift parameter is ignored. Con-
cering the other satellite parameters, there are 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:
ESA06620.EPH - Precise GPS orbits for day 257 (September 13)
ESA06621.EPH - Precise GPS orbits for day 258 (September 14)
ESA06622.EPH - Precise GPS orbits for day 259 (September 15)
ESA06623.EPH - Precise GPS orbits for day 260 (September 16)
ESA06624.EPH - Precise GPS orbits for day 261 (September 17)
ESA06625.EPH - Precise GPS orbits for day 262 (September 18)
ESA06626.EPH - Precise GPS orbits for day 263 (September 19)
ESA06627.ERP - Earth rotation results for week beginning 1992 September 13
ESA06627.SUM - The name of this text file
==============================================================================
^From: Ch. Reigber
Subject: Processing Center 040-GFZ
-------------------------
Report for GPS Week 661 (Days 250-256) from GFZ
===============================================
This report is generated by the GeoForschungsZentrum Potsdam (GFZ)
on a weekly basis for the International GPS Geodynamics Service (IGS).
PRODUCT SUMMARY
GFZ0661*.EPH: GPS ephemerides for GPS Week 661 (SP3 format, pos. and vel.)
* represents: 0 for Sunday, .... , 5 for Friday
GFZ06617.ERP: Earth rotation parameter (UT1 corrections are not included)
GFZ06617.CLK: ST and SV clock parameters of each observation epoch (the
maser-based clock at Fairbanks is taken as reference clock)
GFZ06617.SUM: Summary file for reporting week
The above specified products are available at CDDIS. The ERP results are
submitted additional to IERS Central Bureau and IERS Sub Bureau for Rapid
Service and Predictions.
*********************************************************************************
Note: Due to AS all product files do not include the day 256,
in the orbit file GFZ06613.EPH (day 253) satellite 3
is eliminated because of large overlap differences (30 to 50 m)
*********************************************************************************
CORE STATION SUMMARY
The Core Station data used in the solutions is given below.
Day of Week 661
S M T W T F
U O U E H R
Site N N E D U I
Name Code
------------------------------------------------------
Algonquin ALGO X X X X X X
Fairbanks FAIR X X X X X X
Goldstone DS10 X X X X X X
Hartebeesthoek HART X X X X X X
Kokee Park KOKR X X X X X X
Mc Murdo MCMU X X X X X X
Ny-Alesund NALL X X X X X X
Pamatai PAMA X X X X X X
Santiago SANT X X X X X X
Tai Shi TAIW X X X X X X
Tidbinbilla TIDB X X X X X X
Tromsoe TROM X X X X X X
Usuda USUD X X X X X X
Wettzell WTZ1 X X X X X X
Yellowknife YELL X X X X X X
Yarragadee YAR1 X X X X X X
------------------------------------------------------
SOLUTION CHARACTERISTICS
1. Analysis Center: GFZ/DLR
2. Analysing Team: D. Angermann, R. Galas, Ch. Reigber,
W. Sommerfeld, S.Y. Zhu
3. Solution Identifier: EPH(GFZ)92G01-DDD
ERP(GFZ)92G02-DDD
CLK(GFZ)92G01-DDD (only relative)
4. Software used: GEPARD4.0
5. 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.56)
ALGO, YELL, FAIR, KOKR, TROM, WTZ1, YAR1, PAMA,
MCMU, TAIW, DS10, SANT, HART
6. Data used:
- undifferenced pseudo ranges and carrier phases
- 1-day arc solutions
7. 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)
SOLUTION STATISTICS
Arc No. 0 1 2 3 4 5
------------------------------------------------------------------
Observation Interval [sec] 360 360 360 360 360 360
Number of observations 22402 24414 21114 22695 23528 24782
RMS of carrier phases [cm] 0.8 0.9 0.8 0.9 1.1 0.9
RMS of code measurements [cm] 47.0 48.1 46.2 49.3 55.9 48.2
------------------------------------------------------------------
- GFZ06617.ERP
============
Solution identifier for ERP-Results:
* GPS week 650-653: ERP(GFZ)92G01-DDD
* since GPS week 654: ERP(GFZ)92G02-DDD
Please notice, that these two solutions are related to
different reference frames.
MJD x sigmax y sigmay
48871.5 0.0005 0.0004 0.5046 0.0004
48872.5 0.0041 0.0003 0.5054 0.0003
48873.5 0.0067 0.0004 0.5078 0.0004
48874.5 0.0090 0.0003 0.5067 0.0003
48875.5 0.0098 0.0004 0.5072 0.0004
48876.5 0.0140 0.0003 0.5080 0.0003
- GFZ06617.CLK
============
The clock parameter file is avaibable at CDDIS.
The format of this file is described in the
IGS Message No. 55.
==============================================================================
^From: Dennis McCarthy
Subject: GPS Earth Orientation Data
--------------------------
Subject: Preliminary look at GPS Earth orientation
Date: 28 September 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 62 -0.78 -2.50 1.29 1.92
-48863.5
Scripps 48780.5 103 -1.08 -1.60 0.78 0.59
-48883.5
U. of Berne 48792.5 8 -1.07 1.23 -0.28 1.51 1.92 0.13
(ITRF90) -48799.5
U. of Berne 48800.5 78 -0.45 0.19 -1.96 0.80 0.92 1.01
(ITRF91) -48877.5
JPL 48794.5 75 -1.19 -0.09 0.68 0.90
-48876.5
GFZ 48795.0 79 -2.28 -1.81 1.17 1.21
-488760.5
ESOC 48794.5 91 -1.64 0.36 1.38 2.13
-48884.5
EMR 48838.5 32 -0.69 -1.44 1.53 0.87
-48883.5
Plots are available by FAX to anyone interested.
Regards,
Dennis McCarthy
dmc at maia.usno.navy.mil
==============================================================================
^From: James F. Zumberge
Subject : JPL analysis report
-------------------
Submitted by
J F Zumberge, G Blewitt, 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):
______________________________________________________________________________
filename contents
______________________________________________________________________________
jpl06627.sum This text file.
jpl06627.erp Earth rotation parameters for GPS week 662.
jpl06627.sp1 GPS ephemerides for GPS week 662, sp1 format.
jpl06627.sp3 " " " " " " , sp3 " .
______________________________________________________________________________
A-S testing occurred during "12 Sep 92 0100 UT to 14 Sep 92 1000 UT" and
"19 Sep 92 0100 UT to 21 Sep 92 1000 UT", according to the file
pub/gps/gpstd.txt obtained from tycho.usno.navy.mil. Results for Sunday,
Sep 13, and Saturday, Sep 19, are not included in this submission. The
results for Monday, Sep 14, exclude data from Block-II satellites
acquired when A-S was on. (This explains the larger-than-normal formal
errors of LODR and polar motion parameters for that day.)
WARNING:
JPL LODR TABLE GPS week 662 (1992 Sep 14 - Sep 18)
MJD LODR +/-
(ms/day)
48879.5 1.86 0.12
48880.5 1.88 0.07
48881.5 1.78 0.07
48882.5 2.08 0.07
48883.5 2.20 0.07
END LODR TABLE
NOTE: In the following table, UT1R-UTC are the assumed nominal values from
IERS Bulletin-B predicts; estimated LODR values are given in the previous
table. See IGS Mail Message 97 for details.
JPL UTPM TABLE GPS week 662 (1992 Sep 14 - Sep 18)
MJD X Y UT1R-UTC XSIG YSIG UTSIG RMS XYC XUC YUC STA SAT PASS
'' '' sec '' '' sec
48879.5 .01886 .50546 .32069 .00060 .00060 .00000 .0 -.12 .00 .00 24 18 0
48880.5 .02169 .50774 .31873 .00023 .00027 .00000 .0 -.01 .00 .00 25 18 0
48881.5 .02352 .50742 .31676 .00021 .00024 .00000 .0 .01 .00 .00 25 18 0
48882.5 .02634 .50747 .31477 .00022 .00024 .00000 .0 .05 .00 .00 24 18 0
48883.5 .02819 .50799 .31278 .00022 .00024 .00000 .0 .07 .00 .00 26 18 0
END UTPM TABLE
The following table indicates the "3-dimensional orbit repeatability", as
defined in IGS Mail Message 37, for GPS week 662:
JPL ORBIT REPEATABILITY TABLE GPS week 662 (1992 Sep 14 - Sep 18)
92 9 14 92 9 15 92 9 16 92 9 17 92 9 18
prn rms (m)
2 1.2 1.52 1.28 1.97 0.8
3 1.0 1.24 1.68 1.47 1.6
11 1.0 2.16 1.03 1.18 1.1
12 2.4 1.63 0.78 1.15 1.1
13 2.0 1.41 1.68 1.74 3.8
14 1.2 2.32 1.15 0.85 0.9
15 2.2 1.38 0.87 1.36 1.9
16 3.2 2.25 4.41 2.57 2.2
17 2.0 1.97 1.25 0.95 1.4
18 1.3 0.56 1.07 0.59 1.4
19 2.2 1.17 1.09 0.89 1.4
20 1.8 1.61 1.88 1.44 2.8
21 1.5 0.93 0.63 0.82 0.4
23 0.9 1.46 0.95 1.07 0.6
24 2.9 2.98 2.82 2.27 2.6
25 2.9 1.48 1.60 1.83 2.0
26 1.3 1.68 1.16 1.72 0.6
28 1.9 1.52 0.58 1.07 0.4
END ORBIT REPEATABILITY TABLE
As described in IGS Mail Message 37, the following table compares the JPL
precise ephemerides with those from the broadcast ephemeris:
JPL COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES
92 9 14 92 9 15 92 9 16 92 9 17 92 9 18
prn rms (m)
2 8.2 9.2 10.8 11.8 10.6
3 13.3 8.2 12.9 19.4 13.6
11 5.6 8.4 7.7 4.8 4.3
12 9.1 16.0 9.2 6.5 5.8
13 6.7 5.9 10.1 11.0 7.02
14 7.6 8.8 8.3 9.1 5.7
15 4.1 5.7 5.7 5.2 4.4
16 10.1 11.9 12.4 12.7 12.0
17 8.3 5.5 5.9 9.0 7.0
18 8.5 9.5 10.2 9.5 10.5
19 3.9 3.6 3.4 3.8 4.6
20 8.7 9.2 13.5 13.0 11.3
21 8.2 9.0 10.4 8.6 13.4
23 9.0 8.0 3.0 11.5 4.0
24 13.5 12.4 11.4 14.9 11.7
25 6.3 6.9 7.3 8.7 10.3
26 11.4 9.6 9.5 8.6 9.2
28 5.1 3.5 3.4 2.8 3.0
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES
The following table, as explained in IGS Mail Message 91, indicates which
tracking sites were used in this week's analysis:
JPL GROUND STATION INCLUSION TABLE GPS week 662 (1992 Sep 14 - Sep 18)
92 9 14 92 9 15 92 9 16 92 9 17 92 9 18
ALBH X X X X X
ALGO* X X X X X
FAIR* X X X X X
GOLD X X X X X
HART* X X X X X
HERS X X X X
JPLM X X X X X
KOSG X X X X X
MADR* X X X X X
MASP X X X
MATE X X X X X
MCMU X X X X X
METS X X X X X
NYAL X X X X X
ONSA X X X X X
PAMA X X X X X
PENT X X X X X
SANT* X X X X X
STJO X X X X X
TAIW X X X X X
TIDB X X X X X
TROM* X X
USUD X X X X X
WETT X X X X X
YAR1* X X X X X
YELL X X X X X
_______________________
*Indicates fiducial site.
END GROUND STATION INCLUSION TABLE
==============================================================================
^From: Ruth E. Neilan, JPL
Subject: IGS ABSTRACTS FOR THE FALL AGU
------------------------------
==================
SPECIAL IGS/SEARCH SESSION AT THE AGU
A FEW ABSTRACTS SUBMITTED TO THIS SESSION
APPEARED TO HAVE BEEN "LOST" IN THE SYSTEM;
HOPEFULLY WE HAVE CAUGHT THEM ALL. HOWEVER AS A
CHECK, PLEASE FAX TO JEAN DICKEY AT JPL: (818-393-
6890) ANY SUBMITTED ABSTRACTS IN ORDER TO VERIFY
THIS.
TIME IS IMPORTANT. --- PLEASE FAX ASAP (EOD 9.29.92) !!!!!
THANK YOU FOR YOUR CONSIDERATION,
JEAN DICKEY
More information about the IGSMail
mailing list