[IGSREPORT-4112] Wk 0920 JPL Analysis Report
D
D
Tue Sep 9 12:15:13 PDT 1997
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IGS Electronic Report Tue Sep 9 12:15:13 PDT 1997 Message Number 4112
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Author: D C Jefferson
Subject: Wk 0920 JPL Analysis Report
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JPL ANALYSIS REPORT GPS-WEEK 0920 (DAYS 236-242, DATES 1997 Aug 24 - Aug 30)
******************************************************************************
Submitted by the JPL IGS/FLINN Analysis Team:
J F Zumberge, Y E Bar-Sever, D C Jefferson, M B Heflin, M M Watkins, F H Webb
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 (128.149.70.41),
directory pub/jpligsac/0920. These files (except for *.tro) have also
been sent to the CDDIS.
______________________________________________________________________________
filename contents
______________________________________________________________________________
jpl09207.sum This text file.
jpl09207.erp Earth rotation parameters for GPS week 920.
jpl09207.snx Ground station coordinates for GPS week 920, SINEX format.
jpl0920[0-6].sp3 GPS ephemerides for GPS week 920, sp3 format.
jpl0920[0-6].tro Ground station troposphere estimates for GPS week 920.
______________________________________________________________________________
Median Orbit Repeatability (see table below): 11.0 cm
STRATEGY UPDATE
---------------
This week we introduce several modifications to our processing strategy;
all changes take place as of day 236 (97aug24):
1. We have switched from using the Lanyi troposphere mapping function
to the Niell mapping function.
2. We are now estimating troposphere horizontal delay gradients at all the
sites. The two gradient parameters are modeled as random walk with sigma
of 0.3 cm/sqrt(hour) and are estimated every five minutes.
3. We have reduced the random walk sigma on the estimated zenith wet delay
from 10.2 cm/sqrt(hour) to 3 cm/sqrt(hour).
4. We reduced the carrier phase post-fit residual rejection criterion (window)
from 5 cm to 2.5 cm.
We have not changed the elevation angle cutoff; it remains at 15 degrees.
Details of this estimation strategy are presented in: Bar-Sever, Y.E., P.M.
Kroger and J.A. Borjesson, "Estimating Horizontal Gradients of Tropospheric
Path Delay with a Single GPS Receiver". (Submitted for publication. Copies
available upon request.)
GENERAL
-------
Data from the newly-launched PRN13 were included on days 238 and 239 only,
heavily deweighted. This satellite was mismodeled on days 236, 237, 240, 241,
and 242, and has been excluded on these days accordingly. This satellite
does not appear in any of the sp3 orbit products for this week.
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: USUD (not ALGO) used as reference clock day 236.
WARNING: FAIR (not ALGO) used as reference clock days 237 and 240.
WARNING: NLIB (not ALGO) used as reference clock days 238 and 242.
WARNING: PIE1 (not ALGO) used as reference clock day 239.
WARNING: Data from PRN13 deweigted days 238 and 239, excluded all others.
WARNING: Data from MDO1, METS, TAHI excluded day 236.
WARNING: Data from AOA1, KELY, KOKB, METS, POTS excluded day 237.
WARNING: Data from CSN1, KELY, KOUR, METS, VCIO excluded day 238.
WARNING: Data from CSN1, KELY, KOUR excluded day 239.
WARNING: Data from AOA1, CSN1, GOLD, HERS, KELY, MAD2, MADR, MALI, MCM4, MDO1, MKEA, NLIB excluded day 240.
WARNING: Data from CSN1, KELY, MADR, MATE excluded day 241.
WARNING: Data from DAM2, MALI excluded day 242.
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 920 (1997 Aug 24 - Aug 30)
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
50684.50 17827 46926 456735 1449 4 4 8 8 37 8 25 221 -220
50685.50 18086 46739 455262 1498 4 4 8 8 37 6 25 202 -192
50686.50 18285 46591 453733 1559 3 4 8 8 37 8 26 190 -183
50687.50 18500 46424 452161 1586 4 4 9 9 37 7 26 228 -202
50688.50 18738 46267 450553 1630 4 5 10 10 37 7 25 218 -158
50689.50 18953 46090 448937 1601 4 4 9 9 37 8 25 227 -250
50690.50 19144 45886 447321 1632 3 4 9 9 37 9 25 201 -154
END ERP TABLE
The following table indicates the "3-dimensional orbit repeatability", as
defined in IGS Mail Message 37, for GPS week 920:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]
JPL ORBIT REPEATABILITY TABLE GPS week 920 (1997 Aug 24 - Aug 30)
97 8 24 97 8 25 97 8 26 97 8 27 97 8 28 97 8 29 97 8 30
prn 3d rss (cm)
1 15 9 11 19 31 7 9
2 10 8 4 8 10 9 9
3 31 31 20 21 22 20 19
4 7 9 7 24 25 15 4
5 6 9 8 16 12 15 4
6 23 12 10 16 8 31 20
7 9 14 9 11 11 12 10
9 9 7 10 13 9 10 5
10 9 8 6 47 26 24 7
13 86 101
14 18 15 12 10 14 6 20
15 19 14 12 15 10 19 7
16 13 8 9 9 14 8 12
17 13 19 12 19 22 19 11
18 8 8 7 15 9 11 9
19 13 7 8 13 9 14 9
21 31 14 13 20 9 18 11
22 8 9 7 17 41 11 11
23 18 12 18 25 16 18 28
24 9 9 8 9 11 16 12
25 12 10 13 10 7 9 7
26 6 13 8 26 25 21 11
27 7 10 11 8 8 10 10
29 22 11 14 9 10 6 6
30 6 10 7 9 14 11 4
31 14 13 13 14 12 11 15
_______________________
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 920 (1997 Aug 24 - Aug 30)
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)
| | | | | | |
|___ |__ |_______ |_______ |___ |___ |__
ALBH 3.0 16.7 48.1 40.2 4.36 2.89
ALGO* 6.8 68.8 .179e-01 47.2 4.76 2.70
ANKR 3.9 138. -.169 52.3 4.76 2.90
AREQ 6.9 96.9 -.173 41.2 4.31 2.36
ASC1 .9 77.2 -.273 66.0 5.00 1.72
AUCK 2.0 82.1 -.202 40.0 5.52 2.79
BAHR 5.7 .709 128. 60.2 5.99 3.78
BRAZ 3.7 197. -.184 57.2 5.00 3.14
BRMU 4.0 129. -.168 38.8 6.76 3.29
BRUS 2.0 .160 3.93 60.5 5.52 2.80
CAS1 6.8 10.6 178. 50.7 5.16 1.72
CASA .9 18.4 75.8 35.0 4.00 2.83
CHAT 6.9 115. -.183 76.9 5.15 2.49
CHUR 4.0 2.19 .721 36.0 5.52 2.01
CRO1 5.9 162. -.173 49.7 5.87 2.14
DGAR 5.8 157. -.184 67.2 6.14 1.69
DRAO 1.0 .966 1.64 37.0 4.00 2.71
DUBO 1.0 577. -.169 49.0 4.00 2.35
FAIR* 6.2 .194 .491e-01 34.6 4.92 2.25
FLIN .9 86.6 -.209 46.0 5.00 2.74
FORT 5.8 .553e+05 287. 44.6 4.85 3.20
GODE 1.0 .170 -.284 46.0 6.00 3.08
GOL2* 6.0 49.6 -.292e-01 52.7 4.18 2.18
GUAM 6.9 131. -.189 58.3 7.60 2.11
HARK 3.8 10.8 9.31 52.3 5.00 2.95
HKLO 2.0 .290e+06 498. 52.5 6.52 2.46
HOB2 2.0 88.8 -.206 52.5 5.00 2.83
IISC 2.0 84.7 -.123 72.0 6.00 2.49
IRKT 4.8 42.2 -.193 64.7 5.00 2.49
KERG 3.8 .255e+04 27.5 . 5.28 2.35
KIRU 5.0 10.3 .195 56.4 6.00 2.12
KIT3 3.7 133. -.147 59.9 5.00 2.93
KOKB* 4.4 417. -.187 78.5 5.83 1.65
KOSG* 6.9 1.46 -24.0 46.2 5.75 2.68
KWJ1 2.9 132. -.223 58.3 6.68 1.82
LHAS 1.9 .230e+05 4.67 59.2 5.00 2.43
LMNO .9 .288e+06 487. 55.0 5.00 2.42
MAC1 6.7 95.1 -.186 32.2 4.00 2.35
MAD2 2.0 .206e+04 .573 84.0 6.50 2.01
MADR* 2.8 .895 -1.01 . 6.40 2.24
MALI 4.8 119. -33.2 . 7.61 2.36
MAS1 6.9 3.19 .502 45.2 4.74 2.53
MATE 1.0 .215 1.67 . 5.00 3.07
MCM4 4.9 98.2 -.154 35.2 4.00 1.73
MDVO 1.8 .519e+05 488. 72.5 7.00 1.77
MKEA 4.9 .648 -.836e-01 46.4 5.20 2.58
NLIB 3.9 .107 -.161e-01 48.5 5.77 2.57
NOTO 1.8 .702e-01 2.28 44.0 6.03 2.70
NRC1 2.0 .133 -.219 65.0 5.52 3.03
PENC 1.0 3.85 963. 45.0 6.00 2.85
PERT 6.9 2.28 -10.1 54.2 5.36 2.64
PIE1 3.0 .873e-01 .245e-01 49.0 5.36 2.69
POL2 .9 86.7 -.200 46.0 4.00 2.54
RCM6 6.0 123. -.176 57.2 6.85 2.46
REYK 5.9 77.8 -.175 58.2 5.85 2.21
SANT* 5.1 .146e+04 -.805 40.3 5.14 1.19
SELE 1.0 110. -.110 36.0 4.00 3.22
SHAO .9 107. -.178 61.0 5.00 2.43
STJO 4.8 166. .766 38.2 4.88 2.95
TAEJ .9 .290e+06 510. 41.0 6.00 2.77
THU1 1.7 74.2 -.243 47.0 5.00 2.85
TID2* 6.9 .543 -.243 39.6 5.03 2.68
USNO .9 .203 -.216e-01 58.0 5.00 2.87
USUD 5.8 .743 .139 40.5 5.84 2.74
VILL .9 8.25 -.198 70.0 6.00 2.79
WES2 1.0 1.65 23.7 58.0 4.00 2.81
WTZR* .9 2.42 -3.05 64.0 5.00 2.67
WUHN 4.8 .472e+06 -.306e+04 48.8 5.81 2.83
YELL* 3.8 .830 -.773 45.5 5.00 1.82
ZWEN .9 116. -.257 63.0 5.00 2.36
PRN01 6.3 82.0 26.8 52.9 5.72 2.72
PRN02 6.9 81.1 -396. 54.6 5.31 2.61
PRN03 6.6 81.9 46.6 55.6 5.00 2.12
PRN04 6.9 81.9 43.8 52.2 5.16 2.31
PRN05 6.9 81.1 110. 51.1 5.15 2.35
PRN06 6.5 82.1 -.499 52.1 5.74 2.27
PRN07 6.7 80.0 753. 50.6 5.31 2.31
PRN09 6.9 79.4 -9.41 53.4 5.44 2.27
PRN10 6.8 80.1 11.9 55.7 5.60 2.13
PRN14 6.9 82.6 21.5 49.8 5.44 2.46
PRN15 6.9 3.14 461. 54.4 5.45 2.16
PRN16 6.9 81.8 25.2 51.8 5.46 2.36
PRN17 6.8 80.5 -158. 54.8 5.46 2.41
PRN18 6.7 79.9 3.71 49.4 5.30 2.39
PRN19 6.9 79.0 189. 51.9 5.00 2.66
PRN21 6.9 80.1 76.5 52.4 5.45 2.49
PRN22 6.9 80.0 13.6 48.2 5.48 2.46
PRN23 6.8 81.7 2.96 51.7 5.60 2.41
PRN24 6.9 80.6 730. 52.6 5.31 2.37
PRN25 6.9 81.7 -5.99 47.6 5.30 2.51
PRN26 6.5 81.1 -9.51 49.9 5.59 2.27
PRN27 6.9 82.1 40.4 52.0 5.00 2.43
PRN29 6.7 82.9 282. 49.8 6.01 2.63
PRN30 6.9 81.6 -77.5 51.2 5.16 2.53
PRN31 6.7 80.1 -.604 53.4 5.59 2.40
_______________________
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
97 8 24 97 8 25 97 8 26 97 8 27 97 8 28 97 8 29 97 8 30
prn 3d rss (cm)
1 294 338 346 398 425 373 426
2 176 194 231 220 242 380 306
3 439 271 743 237 533 270 587
4 548 158 255 392 212 201 240
5 235 227 372 458 855 292 263
6 737 891 603 961 916 749 1109
7 605 854 390 438 559 392 317
9 321 248 282 262 278 346 370
10 1112 179 266 271 486 414 461
13 228 464
14 262 472 2053 282 249 433 537
15 292 302 212 253 171 252 235
16 444 1271 506 685 372 763 1831
17 133 135 134 246 582 164 120
18 735 527 397 452 778 1290 289
19 491 421 228 277 262 409 639
21 216 194 243 203 203 411 245
22 622 332 263 352 362 416 333
23 443 249 251 500 474 481 262
24 296 365 382 654 653 366 564
25 238 340 320 314 370 389 305
26 223 291 370 239 237 322 288
27 453 464 374 410 417 383 304
29 335 280 338 250 280 282 254
30 121 202 160 193 202 196 158
31 198 274 471 398 276 241 246
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES
global: albh algo ankr areq asc1 auck bahr braz brmu brus cas1 casa chat chur cro1 dgar drao dubo fair flin fort gode gol2 guam hark hklo hob2 iisc irkt kerg kiru kit3 kokb kosg kwj1 lhas lmno mac1 mad2 madr mali mas1 mate mcm4 mdvo mkea nlib noto nrc1 penc pert pie1 pol2 rcm6 reyk sant sele shao stjo taej thu1 tid2 usno usud vill wes2 wtzr wuhn yell zwen
[Mailed From: djeff at cobra.jpl.nasa.gov]
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