Subject: [IGSMAIL-252] jpl data center changes
From: Dave Starr
Date: 8 MAY 1993 13:55:08

IGS Electronic Mail        8-MAY-1993 13:55:08       Message Number 252
***********************************************************************

From: Dave Starr
Subj: jpl data center changes
-----------------------------

As of 6 May 1993, GPS tracking data processed by the JPL GPS Data Processing
Center will be posted in the RINEX version 2. These files will represent
cross-correlation data from Rogue/TurboRogue receivers using the conventions
agreed upon at the recent IGS meeting in Berne. Due to other processing
constraints we will generate version 1 navigation files for the next couple of
weeks. Note to Gipsy users: Gipsy software has been updated to accomodate
changes for Rinex version 2.

A summary of changes and examples of the new JPL files follow.

- Dave and Tom

=======================================================================
W. Dave Starr                      Telephone:   (818) 354 7436
Thomas G. Lockhart                 Telephone:   (818) 354 6102
GPS Networks & Operations Group    FAX:         (818) 393 4965
Jet Propulsion Laboratory          Email:       [email-masked]
4800 Oak Grove Dr.
Pasadena, CA 91109
=======================================================================

Summary of changes for Rinex version 2 tracking data from JPL:

 1) Rinex version number changes from 1 to 2.
 2) END OF HEADER terminates file header (rather than blank line).
 3) Data ordering changes:
   a) (DSN sites only)            from CA, L1, L2, P1, P2 to L1, L2, P1, P2, CA.
   b) (non-DSN sites with AS off) from L1, L2, P1, P2 to L1, L2, P1, P2.
   b) (non-DSN sites with AS on)  from L1, L2, P1, P2 to L1, L2, P1, P2, CA.
 4) For tracking in cross-correlation mode (usually, with AS (Y-code) on):
   a) (non-DSN sites only)        P-code tracking has CA = 0, sig = 1.
   b) (all sites)                 P-code tracking has lli = 0, 1 (bit 0 => lli).
   c) (all sites)                 Y-code tracking has P1 = 0, sig = 1.
   d) (all sites)                 Y-code tracking has lli = 4, 5 (bit 2 => AS).
 5) Signal strength (sig) field is mapped as follows:
       SNR    SIG
   a) >500     9
   b) >100     8
   c) > 50     7
   d) > 10     6
   e) >  5     5
   f) >  0     4
   g) =  0     1
   h)  bad     1
   i) unknown  0

Summary of changes for Rinex version 2 ephemerides data from JPL:

 1) Rinex version number changes from 1 to 2.
 2) END OF HEADER terminates file header (rather than blank line).
 3) extra line added to the end of each data block (currently, zero filled).

Tracking file example:

     2              OBSERVATION DATA                        RINEX VERSION / TYPE
TRK_TO_RINEX v1.5   JET PROPULSION LAB. 93-05-07 12:10:58   PGM / RUN BY / DATE
FILES OBTAINED FROM THIRD PARTIES MAY NOT BE IDENTICAL TO   COMMENT
 THE LATEST AVAILABLE FROM JPL. FOR INFORMATION CONTACT:    COMMENT
 THOMAS G. LOCKHART    | PHONE (818)354-6102                COMMENT
 NASA/JPL M/S 238-625  | FAX   (818)393-4965                COMMENT
 4800 OAK GROVE DRIVE  | EMAIL [email-masked]   COMMENT
 PASADENA CA 91109 USA |       LOGOS::JPLGPS                COMMENT
USUDA                                                       MARKER NAME
GNET02              JPL                                     OBSERVER / AGENCY
     0              ROGUE               7.00.1              REC # / TYPE / VERS
     0                                                      ANT # / TYPE
 -3855280.6603  3427406.8608  3741032.0342                  APPROX POSITION XYZ
        0.0000        0.0000        0.0000                  ANTENNA: DELTA H/E/N
     1     1                                                WAVELENGTH FACT L1/2
     5    L1    L2    P1    P2    C1                        # / TYPES OF OBSERV
    30                                                      INTERVAL
    93     4    30     0     0    0.000000                  TIME OF FIRST OBS
    93     4    30    10    38    0.000000                  TIME OF LAST OBS
                                                            END OF HEADER
 93 04 30 00 00  0.0000000  0  6 01 12 20 21 23 25
  -1195727.61048   -931735.01646         0.00041  20861011.93946  20861010.64248
   1982626.96908   1544902.54907  23849279.00208  23849282.91107         0.00001
     93631.50148     72960.94446         0.00041  20175597.33246  20175595.54948
   1678552.03148   1307962.15345         0.00041  21791418.85745  21791414.66148
   2425887.42448   1890299.65144         0.00041  23476306.05644  23476300.47848
  -1617705.71548  -1260547.52644         0.00041  22898018.77344  22898015.36348
 93 04 30 00 00 30.0000000  0  6 01 12 20 21 23 25
  -1243906.58648   -969277.07146         0.00041  20851842.84246  20851841.33248
   2064687.14508   1608845.46807  23864894.60508  23864898.42107         0.00001
    104366.16748     81325.63146         0.00041  20177639.92946  20177638.33648
   1756704.97948   1368860.50145         0.00041  21806291.00745  21806287.11548
   2532758.67548   1973575.81644         0.00041  23496645.30844  23496638.96048
  -1686741.29748  -1314341.42945         0.00041  22884882.00345  22884879.20048
 93 04 30 00 01  0.0000000  0  6 01 12 20 21 23 25
  -1291747.09548  -1006555.38546         0.00041  20842740.18246  20842738.74048
   2146695.37208   1672747.91107  23880500.38808  23880504.17207         0.00001
    115647.73248     90116.47346         0.00041  20179786.70146  20179784.77148
   1835285.58548   1430092.07845         0.00041  21821243.77845  21821240.10248
   2639745.74948   2056942.19344         0.00041  23517003.91144  23516997.71148
  -1755645.33248  -1368032.80844         0.00041  22871768.57344  22871766.27848
	.
	.
	.

Navigation file example:

     2              NAVIGATION DATA                         RINEX VERSION / TYPE
TRK_TO_RINEX v1.4   JET PROPULSION LAB. 93-05-07 10:21:21   PGM / RUN BY / DATE
FILES OBTAINED FROM THIRD PARTIES MAY NOT BE IDENTICAL TO   COMMENT
 THE LATEST AVAILABLE FROM JPL. FOR INFORMATION CONTACT:    COMMENT
 THOMAS G. LOCKHART    | PHONE (818)354-6102                COMMENT
 NASA/JPL M/S 238-625  | FAX   (818)393-4965                COMMENT
 4800 OAK GROVE DRIVE  | EMAIL [email-masked]   COMMENT
 PASADENA CA 91109 USA |       LOGOS::JPLGPS                COMMENT
                                                            END OF HEADER
12 93  5  4  0 51 44.0-6.252820603549D-04-6.969003152335D-11 0.000000000000D+00
    2.000000000000D+00 3.062500000000D+00 2.065443176856D-09 2.912841598516D+00
    2.495944499969D-07 1.323342660908D-02 2.861022949219D-06 5.153633266449D+03
    1.759040000000D+05-1.583248376846D-07 1.253362500425D+00 1.378357410431D-07
    1.092283422926D+00 3.920937500000D+02-2.603573519002D-01-6.911359314428D-09
    1.392915163365D-11 1.000000000000D+00 6.950000000000D+02 0.000000000000D+00
    2.800000000000D+00 0.000000000000D+00 2.793967723846D-09 2.000000000000D+00
    0.000000000000D+00 0.000000000000D+00 0.000000000000D+00 0.000000000000D+00
20 93  5  4  0 51 44.0 1.736171543598D-05 1.136868377216D-12 0.000000000000D+00
    2.500000000000D+01-1.184062500000D+02 4.593762777230D-09-6.068857427700D-02
   -6.280839443207D-06 4.496805369854D-03 6.098300218582D-06 5.153769971848D+03
    1.759040000000D+05-3.166496753693D-08 1.983560646577D+00-7.636845111847D-08
    9.625888477807D-01 2.633125000000D+02 1.500597521041D+00-8.347490563631D-09
   -3.914448766789D-10 1.000000000000D+00 6.950000000000D+02 0.000000000000D+00
    2.800000000000D+00 0.000000000000D+00 3.725290298462D-09 2.500000000000D+01
    0.000000000000D+00 0.000000000000D+00 0.000000000000D+00 0.000000000000D+00
	.
	.
	.

end of examples.