[IGSREPORT-4707] Wk 0947 JPL Analysis Report
D
D
Tue Mar 17 17:33:37 PST 1998
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IGS Electronic Report Tue Mar 17 17:33:37 PST 1998 Message Number 4707
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Author: D C Jefferson
Subject: Wk 0947 JPL Analysis Report
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JPL ANALYSIS REPORT GPS-WEEK 0947 (DAYS 60-66, DATES 1998 Mar 01 - Mar 07)
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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/0947. These files (except for *.tro) have also
been sent to the CDDIS.
______________________________________________________________________________
filename contents
______________________________________________________________________________
jpl09477.sum This text file.
jpl09477.erp Earth rotation parameters for GPS week 947.
jpl09477.snx Ground station coordinates for GPS week 947, SINEX format.
jpl0947[0-6].sp3 GPS ephemerides for GPS week 947, sp3 format.
jpl0947[0-6].tro Ground station troposphere estimates for GPS week 947.
______________________________________________________________________________
Median Orbit Repeatability (see table below): 9.0 cm
STRATEGY UPDATE
---------------
Beginning day 060 (and the same for the JPL rapid orbit), we make use of
ITRF96 coordinates and velocities for fiducial (constrained) stations in
our global solutions. Monument coordinates and velocities are taken from
ftp://lareg.ensg.ign.fr/incoming/ITRF96_IGS_RS47.SNX (now available at
ftp://igscb.jpl.nasa.gov/igscb/station/coord/ITRF96_IGS_RS47.SNX.Z), and
antenna heights from ftp://igscb/igscb/station/general/igs.snx. (Antenna
reference point to L1 and L2 phase centers are from ftp://igscb/igscb/station/
eneral/igs_01.pcv.)
As we use only 37 stations in our daily processing, we select a subset of the
47 sites designated by the IGS as fiducials in the following manner:
a) Automatically include and constrain the following 22 sites when
available: ALGO DAV1 FAIR FORT GOL2 HARK IRKT KERG KIT3 KOKB KWJ1
MAC1 MAD2 MALI OHIG ONSA SANT TID2 TSKB WTZR YAR1 YELL.
b) Allow the remaining 15 sites to be selected normally, based on
geographic distribution. Constrain any of these that are IGS fiducials
to their ITRF96 values.
The jpl.acn file at the IGS CBIS has been updated to reflect these changes.
Orbits, Earth orientation, SINEX station coordinates, and daily transformation
files are now in ITRF96. Note that at the present time, we continue to use the
names GOL2, HARK, MAD2, MAS1, and TID2 instead of GOLD, HART, MADR, MASP, and
TIDB for the TurboRogue receivers at those locations.
GENERAL
-------
We continue to exclude all data from PRN13 and deweight all data from PRN08
this week. We should mention that, following IGS guidelines, as of week 945,
our sp3 files include solutions for all satellites used in the global analyses.
This means that satellites which were previously excluded for having large
formal errors (like PRN08, due to deweighting) are now represented in our sp3
files with appropriate sp3 accuracy codes.
According to the file nanu1998.mes obtained from the IGS CBIS, PRN31 was
unusable on day 066. Data from this satellite did not meet our initial
convergence criteria on this day and have been excluded from this day's
processing accordingly.
Beginning this week we add four new 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)
BILL (Temecula CA, USA) -2420444.7749 -4737162.4083 3507853.8841
SCIP (San Clemente Isl. CA, USA) -2556587.4388 -4711014.0991 3446241.4327
SIO4 (Scripps4, La Jolla CA, USA) -2455541.6725 -4767225.1106 3441625.9004
WIDC (Wide Canyon CA, USA) -2354891.5014 -4745575.8899 3540667.6009
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: USNO (not NRC1) used as reference clock days 060, 061, and 063-066.
WARNING: TID2 (not NRC1) used as reference clock day 062.
WARNING: Data from PRN08 deweighted the entire GPS week 947.
WARNING: Data from PRN13 excluded the entire GPS week 947.
WARNING: Data from PRN31 excluded day 066.
WARNING: Data from KELY, ONSA excluded day 061.
WARNING: Data from NANO, ONSA excluded day 062.
WARNING: Data from ONSA, YAKZ excluded day 063.
WARNING: Data from CHUR, NICO excluded day 064.
WARNING: Data from SANT excluded day 065.
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 947 (1998 Mar 01 - Mar 07)
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
50873.50 -5982 19407 95193 2222 3 3 10 10 37 22 26 -145 150
50874.50 -6102 19570 92985 2193 2 3 10 10 37 23 26 -180 154
50875.50 -6247 19767 90821 2136 2 3 10 10 37 23 26 -175 141
50876.50 -6416 19942 88683 2140 2 3 10 10 37 23 26 -212 149
50877.50 -6595 20138 86537 2152 2 3 10 10 37 24 26 -211 169
50878.50 -6745 20323 84366 2189 2 2 9 9 37 24 26 -197 167
50879.50 -6897 20531 82174 2196 2 3 10 10 37 24 25 -213 206
END ERP TABLE
The following table indicates the "3-dimensional orbit repeatability", as
defined in IGS Mail Message 37, for GPS week 947:
["3d rss" = sqrt(xrms**2 + yrms**2 + zrms**2)]
JPL ORBIT REPEATABILITY TABLE GPS week 947 (1998 Mar 01 - Mar 07)
98 3 1 98 3 2 98 3 3 98 3 4 98 3 5 98 3 6 98 3 7
prn 3d rss (cm)
1 9 8 8 8 8 10 8
2 18 11 12 9 10 17 13
3 7 9 8 12 6 6 20
4 6 7 7 7 10 8 4
5 12 7 7 11 9 4 6
6 10 10 11 14 9 7 8
7 8 14 9 10 6 8 10
8 56 46 51 93 62 55 54
9 17 7 6 8 12 6 11
10 8 11 14 6 13 11 7
14 8 7 9 9 9 9 9
15 23 8 4 6 8 11 14
16 9 7 12 9 10 7 7
17 14 11 6 8 9 17 12
18 9 9 7 12 16 6 7
19 27 24 28 25 17 12 11
21 17 12 9 7 6 9 10
22 10 10 14 13 8 5 7
23 13 10 16 12 9 9 8
24 12 12 6 10 18 13 19
25 5 4 6 6 6 4 10
26 10 13 14 20 16 12 11
27 22 19 11 13 14 13 11
29 6 5 6 5 6 5 5
30 7 5 18 27 7 4 6
31 9 15 11 20 17 13
_______________________
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 947 (1998 Mar 01 - Mar 07)
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* 6.7 .149e+04 2.26 56.2 4.31 2.91
AREQ* 3.0 95.6 -.230 59.4 5.36 2.02
ASC1 6.1 515. -.199 68.4 5.00 1.54
AUCK 5.0 .177e+07 -53.6 41.0 4.63 2.67
BAHR 7.0 2.64 233. 45.6 4.73 2.91
BOGT 1.5 138. -.237 64.7 6.43 1.71
BRUS 2.0 .523 .814 61.0 5.00 2.84
CAS1 2.8 .699e+07 -.152e+05 38.7 6.38 1.02
CHAT 1.0 111. -.239 79.0 5.00 2.99
COCO 1.9 82.2 -.113e+05 47.4 5.00 2.73
CRO1 2.0 147. -.814e-01 54.0 4.52 2.00
DAV1* 6.9 138. -.179 . 4.74 1.18
DGAR 6.6 445. -.181 66.3 6.03 1.53
EISL 7.0 135. -.190 53.6 5.90 2.69
FAIR* 7.0 20.0 -.158 35.7 4.31 2.27
FORT* 6.8 .214 -.321 76.1 6.86 1.57
GOL2* 6.6 102. .551 61.7 4.40 2.01
GUAM* 7.0 118. -.204 62.7 6.03 1.97
HARK* 6.9 10.5 -.358 55.7 5.46 2.51
HARV 1.0 .849e+07 .107e+05 71.0 5.00 2.66
IISC .9 115. -.230 79.0 5.00 1.69
IRKT* 6.8 .335e+05 -33.8 56.7 4.61 2.49
KERG* 5.8 .205e+04 .192e+04 . 5.51 2.28
KIT3* 2.8 130. -.244 61.2 4.33 3.24
KOKB* 7.0 .213 -17.7 69.2 5.16 2.55
KWJ1* 6.9 118. -.190 71.2 6.18 1.98
LHAS* 6.0 89.8 -.179 49.6 4.69 2.73
LPGS 3.0 415. -.242 59.4 5.69 2.71
MAC1* 5.7 83.5 -.176 47.6 4.50 2.18
MAD2* 6.5 350. .190 58.5 5.00 1.93
MALI* 5.8 .202e+05 -38.7 87.6 7.00 2.05
MCM4 5.0 93.8 -.163 42.9 4.82 1.29
MDVO 3.9 .160e+05 697. 68.0 6.00 1.79
MKEA 6.0 .679e-01 1.10 56.4 4.85 2.55
MOIN 5.0 113. -.170 73.2 6.62 1.94
OHIG* 3.2 .173e+07 -397. 53.4 4.00 .941
ONSA* 3.0 .211 1.77 38.7 4.00 2.19
PERT* 1.9 2.66 -2.80 52.0 5.49 2.49
PIE1* 1.0 .679e-01 -.247 48.0 4.00 2.58
POL2 1.0 81.9 -.234 38.0 4.00 2.65
REYK 2.0 81.6 -.700e-01 58.6 6.00 2.20
SANT* 3.9 .165e+04 1.27 45.1 4.65 1.21
TAHI 5.1 191. -.231 79.5 6.27 2.30
THU1* 5.9 72.6 -.180 44.7 5.69 2.09
TID2* 7.0 8.83 -.341 35.1 6.05 2.33
TSKB* 7.0 1.66 -1.78 46.9 4.15 3.20
USNO 6.3 . . 55.5 5.00 2.78
USUD 7.0 .786 -1.02 45.3 4.00 2.82
WTZR* 7.0 .880e-01 1.80 64.6 4.74 2.73
WUHN 3.9 6.41 -677. 47.5 5.06 2.46
YAR1* 7.0 87.1 -.188 38.6 4.61 2.21
YELL* 6.7 25.9 1.38 44.3 4.61 1.37
PRN01 6.9 82.7 41.0 54.2 5.00 2.19
PRN02 7.0 85.4 -461. 59.3 5.00 2.16
PRN03 7.0 79.8 105. 55.5 5.00 2.20
PRN04 7.0 81.3 14.7 58.4 5.00 2.13
PRN05 7.0 81.8 139. 53.9 5.00 2.29
PRN06 7.0 82.3 -.501 57.0 5.00 2.00
PRN07 7.0 81.3 771. 58.7 5.00 2.17
PRN09 7.0 81.1 -32.4 57.1 5.00 2.09
PRN10 7.0 80.2 19.0 57.6 5.00 1.98
PRN14 7.0 78.8 27.1 51.6 5.00 2.42
PRN15 7.0 3.10 530. 57.4 5.00 2.25
PRN16 7.0 83.7 51.5 56.9 5.00 2.36
PRN17 7.0 80.8 -175. 58.0 5.15 1.87
PRN18 6.9 80.4 11.3 57.0 5.00 2.06
PRN19 7.0 80.7 382. 59.4 5.00 1.95
PRN21 7.0 80.2 26.3 55.6 5.00 2.03
PRN22 7.0 79.9 49.6 54.6 5.15 2.32
PRN23 7.0 80.8 10.4 53.8 5.15 2.22
PRN24 7.0 81.5 802. 64.8 5.30 2.41
PRN25 7.0 81.5 -7.06 53.6 5.16 2.06
PRN26 6.9 81.8 -103. 55.9 5.00 1.97
PRN27 6.9 82.6 19.7 59.0 4.88 2.09
PRN29 6.9 84.4 260. 54.1 5.00 2.34
PRN30 7.0 81.3 -28.2 57.7 5.00 2.24
PRN31 6.0 79.4 1.56 58.0 5.18 2.23
_______________________
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 3 1 98 3 2 98 3 3 98 3 4 98 3 5 98 3 6 98 3 7
prn 3d rss (cm)
1 361 625 698 396 287 316 359
2 316 184 356 212 252 401 184
3 252 381 472 426 238 257 342
4 239 278 583 457 299 639 372
5 322 183 276 276 325 346 494
6 603 732 556 536 597 618 673
7 335 264 584 259 230 337 268
8 667 658 502 591 519 646 459
9 216 457 234 174 179 167 226
10 345 465 489 428 418 310 258
14 365 694 343 643 439 402 918
15 593 419 227 256 268 285 212
16 1330 529 234 589 499 605 382
17 212 322 434 409 307 287 453
18 451 476 301 1034 351 468 546
19 640 289 233 244 889 338 283
21 497 330 398 631 562 294 771
22 365 452 467 641 868 397 401
23 864 431 536 576 669 534 324
24 186 440 460 307 192 497 352
25 521 180 237 264 182 272 478
26 281 495 401 533 435 519 924
27 293 240 400 274 254 420 325
29 637 678 630 454 282 393 444
30 208 309 431 213 247 375 399
31 232 347 540 424 252 270
_______________________
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES
global: algo areq asc1 auck bahr bogt brus cas1 chat coco cro1 dav1 dgar eisl fair fort gol2 guam hark harv iisc irkt kerg kit3 kokb kwj1 lhas lpgs mac1 mad2 mali mcm4 mdvo mkea moin ohig onsa pert pie1 pol2 reyk sant tahi thu1 tid2 tskb usno usud wtzr wuhn yar1 yell
[Mailed From: djeff at cobra.jpl.nasa.gov]
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