[IGSMAIL-55] GFZ analysis results
Ch.
Ch.
Tue Jul 28 09:45:19 PDT 1992
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IGS Electronic Mail 30-JUL-1992 08:49:17 Message Number 55
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==============================================================================
THIS FILE CONTAINS 3 MESSAGES
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>From: Ch. Reigber
Subject: GFZ analysis results
--------------------
Report for GPS Week 652 (Days 187-193) from GFZ
===============================================
This report is generated by the GeoForschungsZentrum Potsdam (GFZ)
on a weekly basis for the International GPS Geodynamics Service (IGS).
PRODUCT SUMMARY
GFZ06527.EPH: GPS ephemerides for GPS Week 651 (SP3 format, pos. and vel.)
GFZ06527.ERP: Earth rotation parameter (UT1 corrections are not included)
GFZ06527.CLK: ST and SV clock parameters of each observation epoch (the
maser-based clock at Fairbanks is taken as reference clock)
GFZ06527.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.
CORE STATION SUMMARY
The Core Station data used in the solutions is given below.
Day of Week 652
S M T W T F S
U O U E H R A
Site N N E D U I T
Name Code
---------------------------------------------------------
Algonquin ALGO X X X X X X X
Fairbanks FAIR X X X X X X X
Goldstone DS10 X X X X X X X
Hartebeesthoek HART X X X X X X X
Kokee Park KOKB X X X X X X X
Mc Murdo MCMU X X X X X - X
Ny-Alesund NALL X X X X X X X
Pamatai PAMA X X X X X X X
Santiago SANT X X X X X X X
Tai Shi TAIW X X X X X - -
Tromsoe TROM X X X X X X X
Usuda USUD X X X X X X X
Wettzell WTZL X X X X X X X
Yellowknife YELL X X X X X X X
Yarragadee YAR1 X X X X X X X
---------------------------------------------------------
SOLUTION CHARACTERISTICS
1. Analysis Center: GFZ/DLR
2. Analysing Team: D. Angermann, R. Galas, Th. Nischan,
Ch. Reigber, S.Y. Zhu
3. Solution Identifier: EPH(GFZ)92G01-DDD
ERP(GFZ)92G01-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.35)
ALGO, YELL, FAIR, KOKR, TROM, WEZ1, YAR1, USUD, NALL
6. Data used:
- undifferenced pseudo ranges and carrier phases
- 2-day arc solutions with one day overlap
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 6
------------------------------------------------------------------------
Number of observations 35185 35377 44851 46041 40830 37857 41041
RMS of carrier phases [cm] 4.4 4.4 4.4 2.9 3.5 5.0 3.8
RMS of code measurements [cm] 44.7 46.7 46.6 44.9 46.2 49.1 43.1
------------------------------------------------------------------------
INFORMATIONS TO PRODUCT GENERATION
The calculation of the 7-day ephemerides file is described below.
Day of GPS Week 652 [Day 0=Sunday; Day 6=Saturday]
Arc No. 0 1 2 3 4 5 6
0 XXXX----
1 XXXX----
2 XXXX----
3 XXXX----
4 XXXX----
5 XXXX----
6 XXXX----
XXXX : The first day of the 2-day arc is used for ephemeris
dissemination
---- : The second day is used for quality control by overlap
The pole coordinates are estimated for three epochs (beginning
of each day) with the 2-day arc's. Using the above described
method (one day overlaps) there are three solutions for each
pole parameter. The submitted ERP-results are the mean values
of these different solutions.
- GFZ06527.EPH (Seven 1-day segments)
============
In the table below the overlap rms differences [m] in radial,
cross- and along-track component are presented.
prn 187 188 189 190 191 192 193 | Mean
======================================================================
2 radial 0.400 0.272 0.363 0.224 0.307 0.618 0.503 | 0.384
2 cross 0.272 0.378 0.933 0.565 0.668 1.591 0.990 | 0.771
2 along 1.134 0.648 0.970 0.811 0.721 1.789 1.246 | 1.046
----------------------------------------------------------------------
3 radial 0.215 0.263 0.200 0.407 0.371 0.670 0.266 | 0.342
3 cross 0.554 0.489 0.480 0.490 0.559 2.058 1.261 | 0.842
3 along 0.551 0.515 0.555 0.780 0.644 1.571 0.968 | 0.798
----------------------------------------------------------------------
11 radial 0.222 0.153 0.094 0.260 0.319 0.167 0.309 | 0.218
11 cross 0.269 0.287 0.618 0.372 0.466 0.871 0.609 | 0.499
11 along 0.596 0.384 0.468 0.666 0.429 1.363 0.729 | 0.662
----------------------------------------------------------------------
12 radial 1.478 2.006 2.776 0.698 1.207 7.561 1.856 | 2.512
12 cross 5.462 5.191 6.591 4.644 1.391 7.672 4.180 | 5.019
12 along 3.837 4.546 6.355 3.418 2.329 17.748 5.212 | 6.206
----------------------------------------------------------------------
13 radial 0.184 0.236 0.329 0.089 0.162 0.327 0.593 | 0.274
13 cross 0.681 0.286 0.473 0.208 0.592 0.903 0.781 | 0.561
13 along 1.007 0.730 1.150 0.643 0.515 1.102 1.146 | 0.899
----------------------------------------------------------------------
14 radial 0.391 0.322 0.261 0.281 0.270 0.629 0.373 | 0.361
14 cross 0.439 0.445 0.396 0.382 0.425 1.549 0.549 | 0.598
14 along 1.123 0.664 0.729 0.579 0.570 1.614 0.908 | 0.884
----------------------------------------------------------------------
15 radial 0.422 0.267 0.317 0.737 0.461 0.413 0.465 | 0.440
15 cross 0.615 0.261 0.678 0.682 0.606 1.278 0.544 | 0.666
15 along 0.792 0.528 0.637 1.669 0.874 1.941 0.880 | 1.046
----------------------------------------------------------------------
16 radial 0.352 0.321 0.377 0.261 0.224 0.948 0.419 | 0.415
16 cross 0.521 0.513 0.654 0.588 0.458 1.215 0.439 | 0.627
16 along 0.840 0.819 0.836 0.679 0.590 1.840 0.865 | 0.924
----------------------------------------------------------------------
17 radial 0.381 0.411 0.506 0.382 0.320 0.683 0.404 | 0.441
17 cross 0.563 0.455 0.663 0.394 0.468 1.217 0.993 | 0.679
17 along 0.729 0.813 1.010 0.643 0.751 2.630 1.931 | 1.215
----------------------------------------------------------------------
18 radial 0.140 0.182 0.139 0.360 0.207 0.301 0.600 | 0.276
18 cross 0.296 0.304 0.510 0.414 0.234 0.821 0.720 | 0.471
18 along 0.489 0.327 0.547 0.933 0.613 1.189 1.245 | 0.763
----------------------------------------------------------------------
19 radial 0.312 0.262 0.444 0.327 0.439 0.250 0.610 | 0.378
19 cross 0.356 0.295 0.475 0.292 0.710 0.962 0.455 | 0.506
19 along 0.747 0.613 1.260 0.703 0.908 1.019 1.128 | 0.911
----------------------------------------------------------------------
20 radial 0.233 0.250 0.344 0.369 0.242 0.650 0.561 | 0.378
20 cross 0.312 0.242 0.836 0.458 0.577 1.053 0.513 | 0.570
20 along 0.683 0.518 0.871 0.783 0.582 1.238 1.359 | 0.862
----------------------------------------------------------------------
21 radial 0.112 0.275 0.273 0.418 0.265 0.414 0.414 | 0.310
21 cross 0.349 0.452 0.625 0.867 0.258 1.466 2.063 | 0.869
21 along 0.269 0.619 0.566 1.182 0.460 1.461 1.417 | 0.853
----------------------------------------------------------------------
23 radial 0.163 0.184 0.157 0.257 0.080 0.196 0.055 | 0.156
23 cross 0.422 0.264 0.612 0.613 0.385 1.763 1.803 | 0.837
23 along 0.387 0.497 0.460 0.757 0.329 1.654 0.712 | 0.685
----------------------------------------------------------------------
24 radial 0.199 0.309 0.325 0.402 0.267 0.416 0.729 | 0.378
24 cross 0.217 0.350 0.503 0.438 0.392 1.209 0.981 | 0.584
24 along 0.574 0.649 0.982 0.961 0.607 1.133 1.407 | 0.902
----------------------------------------------------------------------
25 radial 0.254 0.313 0.423 0.429 0.316 0.490 0.523 | 0.393
25 cross 0.565 0.492 0.681 0.293 0.327 0.671 0.931 | 0.566
25 along 0.784 0.998 1.109 0.823 0.683 0.955 0.984 | 0.905
----------------------------------------------------------------------
28 radial 0.280 0.278 0.443 0.142 0.465 0.284 0.295 | 0.312
28 cross 0.364 0.386 0.687 0.290 0.879 0.920 0.975 | 0.643
28 along 0.623 0.521 1.032 0.372 1.001 1.327 1.148 | 0.861
======================================================================
- GFZ06527.ERP
============
MJD x sigmax y sigmay
48808 -.1401 .0008 0.3866 .0009
48809 -.1405 .0007 0.3852 .0008
48810 -.1389 .0007 0.3875 .0008
48811 -.1357 .0007 0.3908 .0007
48812 -.1321 .0006 0.3945 .0007
48813 -.1306 .0008 0.3978 .0008
48814 -.1308 .0008 0.3992 .0010
- GFZ06527.CLK
============
Description of the clock parameter file (e.g. GFZ06527.CLK):
This file contains the clock parameter of all available
stations and satellites for each epoch related to a fixed
reference clock (if possible, the maser based clock at Fairbanks
is taken as reference). For each epoch the file consists of the
following informations:
(1) header record
column format variable meaning
6-14 F9.2 DATE date related to J2000.0
22-30 F9.2 TIME seconds of day (GPS Time)
46-49 A4 REFCLK 4 Char. station ID of reference clock
58-60 I3 NCLK number of clock corrections for
specified epoch
(2) data record
(ID(I),CLOCK(I),I=1,NCLK)
format: (4(A4,F12.6,1x))
with ID ... 4 Char. ID for station clocks
PRN No. for satellite clocks
CLOCK .... clock corrections [micro seconds] related to
reference clock
Examplary three epochs of this file are listed below.
DATE: -2736.50 TIME: 360.00 REF. CLOCK: FAIR NCLK: 16
FAIR 0.000000 ALGO -0.746915 YELL 387.718353 KOKB -0.674088
TROM 9.330571 WTZL -1.119087 NALL -136.354828 USUD 0.574582
3 350.561035 16 15.260936 17 3.611038 18 3.732432
19 -25.187544 20 -0.147432 24 98.387146 25 22.916180
DATE: -2736.50 TIME: 840.00 REF. CLOCK: FAIR NCLK: 16
FAIR 0.000000 ALGO -0.747267 YELL 387.780792 KOKB -0.674292
TROM 9.341206 WTZL -1.120288 NALL -136.485764 USUD 0.574067
3 350.587769 16 15.399527 17 3.573865 18 3.788386
19 -25.274937 20 -0.060598 24 98.258797 25 22.969181
DATE: -2736.50 TIME: 1320.00 REF. CLOCK: FAIR NCLK: 21
FAIR 0.000000 ALGO -0.747822 YELL 387.842712 KOKB -0.674714
TROM 9.351743 WTZL -1.121624 YAR1 -0.773147 NALL -136.617538
USUD 0.574093 HART -0.712551 3 350.614563 14 0.647907
15 4.877884 16 15.333588 17 3.661784 18 3.776476
19 -25.179214 20 -0.176447 24 98.486992 25 22.963224
28 -8.705925
==============================================================================
>From: Yehuda Bock
Subject: Onsalo problems
---------------
We have found the ONSALA data of day 204 and first 8 hours of
205 are bad. It appears that the receiver had a hardware problem,
which caused the satellite clocks being modeled as a big slope.
==============================================================================
>From: James F. Zumberge
Subject: JPL analysis results
--------------------
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) and should also be available shortly from the CDDIS
(contact noll at cddis.gsfc.nasa.gov):
_______________________________________________________________________________
filename contents
_______________________________________________________________________________
jpl06537.sum This text file
jpl06537.erp Earth orientation for 5 days beginning 1992 Jul 12
jpl06530.sp3 Precise GPS ephemerides, 1992 Jul 12, NGS sp3 format
jpl06531.sp3 Precise GPS ephemerides, 1992 Jul 13
jpl06532.sp3 Precise GPS ephemerides, 1992 Jul 14
jpl06533.sp3 Precise GPS ephemerides, 1992 Jul 15
jpl06534.sp3 Precise GPS ephemerides, 1992 Jul 16
jpl06530.sp1 Precise GPS ephemerides, 1992 Jul 12, NGS sp1 format
jpl06531.sp1 Precise GPS ephemerides, 1992 Jul 13
jpl06532.sp1 Precise GPS ephemerides, 1992 Jul 14
jpl06533.sp1 Precise GPS ephemerides, 1992 Jul 15
jpl06534.sp1 Precise GPS ephemerides, 1992 Jul 16
_______________________________________________________________________________
Because Deep Space Network (DSN) data for the week have been delayed, results
are current only through July 16. The remainder of the week will be included in
next week's submission.
As mentioned in last week's .sum file the NANUs (151-92196 and 155-92197)
regarding prn 24 on Jul 14 and prn 25 on Jul 15 were confirmed. It looks like
prn 12 is behaving properly again.
WARNING: We recommend against using prn 24 on Jul 14.
WARNING: We recommend against using prn 25 on Jul 15.
The following table contains our pole position measurements:
JPL UTPM TABLE (1992 Jul 12 - Jul 16)
MJD X Y UT1R-UTC XSIG YSIG UTSIG RMS XYC XUC YUC STA SAT PASS
'' '' sec '' '' sec
48815.5 -.12651 .40865 .00000 .00024 .00029 .00000 .0 .31 .00 .00 25 17 0
48816.5 -.12692 .41055 .00000 .00023 .00028 .00000 .0 .21 .00 .00 27 17 0
48817.5 -.12580 .41290 .00000 .00025 .00029 .00000 .0 .20 .00 .00 27 16 0
48818.5 -.12451 .41301 .00000 .00025 .00029 .00000 .0 .25 .00 .00 26 16 0
48819.5 -.12358 .41533 .00000 .00024 .00027 .00000 .0 .20 .00 .00 25 17 0
END UTPM TABLE
The following table indicates the "orbit repeatability", as defined in IGS Mail
Message 37, for the first five days of GPS week 653:
JPL ORBIT REPEATABILITY TABLE GPS week 653 (1992 Jul 12 - Jul 16)
92 7 12 92 7 13 92 7 14 92 7 15 92 7 16
prn rms (m)
2 0.52 1.12 0.69 1.03 0.6
3 0.37 0.53 0.34 0.40 0.2
11 0.38 0.48 0.52 0.60 0.3
12 0.46 0.88 1.17 0.54 0.5
13 0.92 0.63 0.77 0.69 0.4
14 1.10 1.23 1.38 0.91 0.7
15 0.95 0.70 0.89 0.67 0.6
16 0.35 0.45 0.64 0.48 0.2
17 0.66 0.87 0.84 0.77 0.7
18 0.40 0.55 0.40 0.31 0.2
19 0.65 0.57 0.56 0.46 0.4
20 0.62 0.73 0.57 0.63 0.3
21 0.36 0.45 0.37 0.46 0.6
23 0.41 0.53 0.27 0.27 0.7
24 0.98 0.9 0.5 0.4
25 0.88 1.11 0.4
28 1.36 1.17 1.38 1.08 0.6
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 7 12 92 7 13 92 7 14 92 7 15 92 7 16
prn rms (m)
2 6.3 5.6 6.0 6.4 6.3
3 11.2 12.6 13.2 12.8 11.3
11 5.7 9.0 5.4 6.5 5.1
12 12.7 8.0 17.0 13.5 11.6
13 5.5 6.1 8.7 7.3 7.9
14 5.7 5.9 6.1 6.2 6.4
15 6.9 8.9 9.2 8.2 7.4
16 8.1 7.4 9.9 10.0 11.8
17 7.2 7.0 7.9 8.4 7.7
18 7.4 7.2 7.4 7.5 8.1
19 8.1 7.3 7.9 8.2 6.6
20 4.5 3.7 4.6 4.2 5.0
21 6.1 5.9 5.1 5.1 5.7
23 5.9 4.9 10.2 7.2 4.4
24 15.1 13.4 13.5 12.6
25 9.1 9.8 10.5 17.5
28 5.3 4.3 4.2 5.0 4.1
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES
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