[IGSREPORT-4873] Wk 0955 JPL Analysis Report
D
D
Mon May 11 13:53:17 PDT 1998
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IGS Electronic Report Mon May 11 13:53:17 PDT 1998 Message Number 4873
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Author: D C Jefferson
Subject: Wk 0955 JPL Analysis Report
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JPL ANALYSIS REPORT GPS-WEEK 0955 (DAYS 116-122, DATES 1998 Apr 26 - May 02)
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Submitted by the JPL IGS/FLINN Analysis Team:
D C Jefferson, Y E Bar-Sever, M B Heflin, M M Watkins, F H Webb, J F Zumberge
all at the Jet Propulsion Laboratory, California Institute of Technology,
Pasadena, CA 91109.
Files listed below are available in Unix compressed format and can be
retrieved using anonymous ftp to sideshow.jpl.nasa.gov (137.78.60.30),
directory pub/jpligsac/0955. These files (except for *.tro) have also
been sent to the CDDIS.
______________________________________________________________________________
filename contents
______________________________________________________________________________
jpl09557.sum This text file.
jpl09557.erp Earth rotation parameters for GPS week 955.
jpl09557.snx Ground station coordinates for GPS week 955, SINEX format.
jpl0955[0-6].sp3 GPS ephemerides for GPS week 955, sp3 format.
jpl0955[0-6].tro Ground station troposphere estimates for GPS week 955.
______________________________________________________________________________
Median Orbit Repeatability (see table below): 8.0 cm
STRATEGY UPDATE and CORRECTION
------------------------------
Since GPS week 936, we have typically used the receiver at NRC1 (Ottawa,
Ontario, Canada) as our default reference clock station. Beginning this week,
we use USNO (US Naval Observatory, Washington D.C.) as the primary reference
clock receiver. As in our previous IGS summary reports, we will continue to
note days on which USNO was not used as the reference clock for a given
analysis.
Also, for most of the time since it was launched, we have heavily deweighted
data from PRN08 in our analyses. Beginning this week, we include all data
from this satellite using normal weighting.
As mentioned previously, it is our policy to exclude all pseudorange data
from any older-style Rogue receivers in the ground network, as these data
are found to be degraded under AS conditions. It has been discovered that
since day 075 (March 16; week 949 day 1), pseudorange data from NYAL has
been mistakenly included for days on which that site was selected. This
error has been corrected beginning with the analysis of day 123 (May 3;
week 956, day 0).
GENERAL
-------
Data from PRN24 were mismodeled on day 119, and we have chosen to excluded
them from the analysis of this day.
Beginning this week, we add two new sites as candidate stations. As with
other sites, these stations are given the opportunity to participate in the
orbit and clock solution as the global site distribution varies. The
following nominal coordinates were assumed:
X (m) Y (m) Z (m)
AMCT (Colorado Springs, USA) -1248596.6102 -4819428.8627 3976505.1459
SUTH (Sutherland, South Africa) 5041274.9589 1916054.0672 -3397076.1650
Due to potential problems, data from stations mentioned below were not
considered for use in the global solution for the day indicated. (For
geographical reasons, they may not have been used in any case.)
WARNING: Data from PRN24 excluded day 119.
WARNING: Data from KELY, KSTU, YAKZ excluded day 116.
WARNING: Data from POTS excluded day 118.
WARNING: Data from CRO1 excluded day 119.
WARNING: Data from CRO1 excluded day 120.
WARNING: Data from CRO1, NYAL, SCIP excluded day 121.
In the following table, UT1R-UTC are the integrated values based on estimated
LODR values in the adjacent column. See IGS Report No. 1498 (jpl07827.sum)
for details:
JPL ERP TABLE GPS week 955 (1998 Apr 26 - May 02)
MJD XPole Ypole UT1R-UTC LODR Xsig Ysig UTsig LODsig Nr Nf Nt Xrt Yrt
10**-5" usec us/d 10**-5" us us/d 10**-5"/d
50929.50 -11267 31798 -19829 2003 2 2 9 9 37 23 27 46 211
50930.50 -11235 32006 -21801 1940 2 2 9 9 37 21 27 29 228
50931.50 -11256 32244 -23722 1903 2 2 9 9 37 22 27 -13 245
50932.50 -11315 32495 -25653 1958 2 2 9 9 37 25 26 -24 275
50933.50 -11296 32704 -27640 2016 2 2 9 9 37 20 27 -3 263
50934.50 -11312 32918 -29674 2052 2 2 8 8 37 20 27 -4 221
50935.50 -11319 33112 -31701 2002 2 2 8 8 37 21 27 -30 204
END ERP TABLE
The following table indicates the "3-dimensional orbit repeatability", as
defined in IGS Mail Message 37, for GPS week 955:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]
JPL ORBIT REPEATABILITY TABLE GPS week 955 (1998 Apr 26 - May 02)
98 4 26 98 4 27 98 4 28 98 4 29 98 4 30 98 5 1 98 5 2
prn 3d rss (cm)
1 9 8 11 8 6 9 10
2 7 9 9 5 9 8 17
3 4 6 7 5 5 6 6
4 12 5 5 6 8 6 9
5 12 10 6 6 6 5 8
6 6 8 8 9 7 10 11
7 9 4 5 19 12 13 19
8 79 10 7 6 9 9 14
9 12 7 6 6 6 10 7
10 7 7 6 5 5 5 7
13 7 8 9 4 4 8 18
14 7 6 13 8 11 12 11
15 8 8 10 5 10 14 9
16 8 10 10 7 20 19 9
17 6 7 9 9 10 5 12
18 10 9 8 6 10 9 5
19 10 12 10 10 8 9 19
21 5 6 8 4 10 9 14
22 5 8 6 6 6 6 7
23 7 8 13 8 12 7 13
24 17 7 7 7 6 8
25 7 7 4 6 6 4 6
26 17 14 12 8 13 15 16
27 9 11 9 9 6 12 7
29 6 7 10 6 7 7 8
30 8 5 6 6 6 5 7
31 13 11 8 9 7 11 14
_______________________
END ORBIT REPEATABILITY TABLE
The following table statistically summarizes this week's "engineering data", as
described in IGS Report No. 1528:
JPL ENGINEERING DATA SUMMARY TABLE GPS week 955 (1998 Apr 26 - May 02)
receiver/transmitter (dot means point positioned, * means fiducial site)
| days analyzed
| | rms clock noise (ns)
| | | average clock solution (us)
| | | | rms pseudorange (cm)
| | | | | (dot means pcode not analyzed)
| | | | | rms phase (mm)
| | | | | | average arc (hr)
| | | | | | |
|___ |__ |_______ |_______ |___ |___ |__
ALGO* 7.0 .111 .322 57.2 4.16 2.74
AREQ* 1.0 100. -.235 56.0 4.00 2.33
ASC1 6.8 152. -.238 77.0 5.14 1.59
AUCK 4.0 86.6 -.239 40.8 4.53 2.73
BAHR 5.9 .491 97.4 42.1 5.23 3.39
BARB 2.6 94.1 -.294 33.0 6.36 3.60
CAS1 4.7 .658e+07 -.119e+05 36.3 5.40 1.51
CHAT 3.0 111. -.241 79.7 5.69 2.79
COCO 5.7 112. -.193e+05 45.2 6.85 2.93
CRO1 1.9 596. -.235 52.6 5.53 1.77
DAV1* 3.6 129. -.216 . 5.05 1.36
DGAR 6.6 668. -.204 68.4 6.36 1.63
DRAO 1.0 .114 -.256 39.0 4.00 2.96
EISL 6.0 121. -.233 53.4 5.87 3.05
FAIR* 7.0 66.8 -.562 43.4 4.59 1.99
FORT* 5.9 .251 -.143 73.4 6.84 1.73
GALA 7.0 137. -.231 78.2 6.01 1.62
GOL2* 7.0 .171 .853 47.0 4.46 2.14
GUAM* 7.0 122. -.247 61.2 6.44 2.14
HARK* 1.8 12.5 -8.34 53.5 5.00 2.88
HRAO 2.0 70.4 -.237 38.5 4.00 2.76
IRKT* 5.8 .355 .919e-01 60.9 5.00 2.45
KELY .6 99.4 -.243 . 5.00 1.50
KERG* 4.8 .300e+04 566. . 5.41 2.27
KIT3* 3.6 122. -.231 80.1 4.77 2.42
KOKB* 7.0 66.4 -.267e-01 73.1 5.03 2.51
KOUR* 1.0 2.30 4.52 70.0 6.00 2.10
KWJ1* 7.0 126. -.241 74.8 5.87 1.90
LHAS* 3.9 98.5 -.244 70.0 4.50 1.47
LPGS 1.0 151. -.192 57.0 5.00 3.44
MAC1* 3.6 96.7 -.234 38.3 4.59 1.87
MAD2* 6.9 231. .632 61.5 6.30 2.13
MAG0 5.0 .289e+06 486. 32.6 4.82 2.28
MALI* 7.0 67.9 -750. 84.6 7.00 2.12
MATE* 1.0 .133 -2.46 44.0 5.00 3.07
MCM4 3.0 93.6 -.241 35.5 4.65 1.36
MKEA 2.0 .121 -.174 52.7 5.00 2.70
NICO .9 95.3 -.232 52.0 5.00 2.55
NOUM 2.0 .289e+06 503. 60.0 6.51 2.17
NYA1 5.7 250. -1.46 41.8 5.19 1.92
NYAL 1.0 .159 -1.77 71.0 5.00 1.50
OHIG* 6.6 .447e+06 -26.6 58.4 5.21 1.87
ONSA* 7.0 .234e+04 1.42 40.8 3.91 2.22
PETR 1.0 84.5 -.226 54.0 5.00 2.51
POL2 2.0 86.0 -.234 53.5 3.53 2.56
REYK 1.0 79.5 -.269 59.0 6.00 1.99
SANT* 6.1 .162e+04 -.194 45.6 4.96 1.53
SELE .9 111. -.270 44.0 4.00 3.11
SFER .8 .610 26.4 65.0 5.00 3.27
STJO 1.0 2.72 5.48 49.0 4.00 2.93
SUTH 3.0 119. -.236 39.8 4.00 2.50
TID2* 7.0 .156 6.30 36.7 5.16 2.49
TSKB* 7.0 1.61 -2.26 48.6 4.87 2.82
USNO 7.6 . . 55.9 5.31 2.67
USUD 3.0 1.86 .277 46.7 5.47 2.73
WTZR* 6.5 .340 -1.08 62.0 4.94 2.92
WUHN 5.8 .134e+06 -96.8 52.5 5.18 2.37
YAKZ .9 .290e+06 427. 46.0 5.00 2.55
YAR1* 7.0 79.2 -.236 36.5 4.00 2.25
YELL* 7.0 .591 -.283 51.8 5.15 1.44
ZECK .9 76.1 -.247 47.0 4.00 2.51
PRN01 7.0 81.6 45.8 52.0 5.45 2.06
PRN02 7.0 79.8 -481. 59.9 5.15 2.16
PRN03 7.0 82.0 122. 56.7 5.00 2.29
PRN04 6.6 81.2 24.0 55.3 5.16 2.03
PRN05 7.0 81.0 147. 57.7 5.00 2.28
PRN06 7.0 81.5 -.443 57.5 5.15 2.07
PRN07 7.0 83.4 776. 55.1 5.00 2.04
PRN08 7.0 81.6 628. 56.3 5.30 2.09
PRN09 7.0 80.6 -39.5 58.6 5.00 2.00
PRN10 7.0 81.6 21.0 58.6 5.00 2.11
PRN13 7.0 82.7 826. 58.4 5.16 2.15
PRN14 7.0 84.0 28.9 51.2 5.00 2.40
PRN15 6.6 3.39 550. 59.6 5.30 2.00
PRN16 7.0 79.6 59.5 58.9 5.29 2.30
PRN17 6.7 82.4 -179. 58.0 5.00 2.03
PRN18 7.0 83.8 13.5 55.2 5.44 2.15
PRN19 6.9 84.7 390. 55.3 5.14 2.11
PRN21 7.0 79.9 36.3 57.8 5.00 2.08
PRN22 7.0 80.9 .749 54.3 5.00 2.31
PRN23 7.0 79.9 12.4 60.2 5.45 2.20
PRN24 5.7 80.3 837. 57.5 5.18 2.04
PRN25 7.0 79.5 -6.77 52.3 5.00 2.20
PRN26 7.0 82.1 8.11 53.0 5.30 2.00
PRN27 7.0 81.5 25.6 57.2 5.30 2.10
PRN29 7.0 81.6 440. 53.1 5.15 2.35
PRN30 7.0 78.3 -36.6 54.7 5.00 2.13
PRN31 7.0 82.4 3.09 57.5 5.45 2.26
_______________________
END ENGINEERING DATA SUMMARY 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
98 4 26 98 4 27 98 4 28 98 4 29 98 4 30 98 5 1 98 5 2
prn 3d rss (cm)
1 208 270 263 456 603 571 446
2 382 226 364 400 787 536 930
3 270 260 179 260 275 251 209
4 659 518 567 400 512 611 725
5 193 297 207 253 342 367 307
6 526 519 450 424 702 547 385
7 528 484 262 242 440 296 181
8 543 537 527 538 319 311 521
9 229 398 224 501 448 262 300
10 326 328 306 220 290 281 532
13 781 328 618 198 892 216 586
14 477 1224 681 295 401 654 338
15 336 275 496 357 436 300 316
16 295 366 329 302 536 608 434
17 314 323 311 237 409 388 347
18 215 342 475 451 336 433 330
19 242 311 458 1102 1523 378 232
21 479 299 162 151 298 363 213
22 263 268 286 294 280 305 302
23 573 351 446 409 230 204 346
24 343 469 268 1088 760 293
25 252 447 555 258 270 362 439
26 242 222 237 195 218 237 176
27 469 359 393 657 376 381 187
29 323 230 264 163 258 346 238
30 264 246 190 270 280 187 176
31 326 418 368 264 380 359 260
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES
global: algo areq asc1 auck bahr barb cas1 chat coco cro1 dav1 dgar drao eisl fair fort gala gol2 guam hark hrao irkt kely kerg kit3 kokb kour kwj1 lhas lpgs mac1 mad2 mag0 mali mate mcm4 mkea nico noum nya1 nyal ohig onsa petr pol2 reyk sant sele sfer stjo suth tid2 tskb usno usud wtzr wuhn yakz yar1 yell zeck
[Mailed From: djeff at cobra.jpl.nasa.gov]
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