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[IGSMAIL-5703]: IGS Rapid Combination (IGR): 1464 2 (Resubmission Resubmission)
- To: igsmail @ igscb.jpl.nasa.gov
- Subject: [IGSMAIL-5703]: IGS Rapid Combination (IGR): 1464 2 (Resubmission Resubmission)
- From: igsacc @ gfz-potsdam.de (Gerd Gendt3)
- Date: Mon, 11 Feb 2008 15:37:00 +0100
- Sender: owner-igsmail
- User-agent: Heirloom mailx 12.3 7/15/07
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IGS Electronic Mail 11 Feb 06:37:03 PST 2008 Message Number 5703
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Author: AC Coordinator / GFZ Potsdam
sum-file Version 2.0
Rapid IGS Orbit Combination - Week 1464 Day: 2 (Jan 29, 2008)
Contacts: G. Gendt (gendt @ gfz-potsdam.de),
Th. Nischan ( nisn @ gfz-potsdam.de)
COMBINATION STRATEGY:
---------------------
For a complete description of the combination strategy along with all tables
and statistics, please refer to the IGS Final Combination reports posted on
CDDIS within 13 days after the end of the GPS week.
PRODUCT FILES:
--------------
The Rapid Orbit files generated and uploaded into CDDIS @ NASA/GSFC are:
igr14642.sp3 IGR GPS ephemeris in SP3 format.
igr14642.clk IGR GPS satellite and station clocks in RINEX format.
igr14642.cls IGR GPS clock combination summary report.
igr14642.erp Earth Rotation Parameters (ERP) and their rates as well as
Universal Time (UT1-UTC) and Length Of Day (LOD) associated
with IGS ephemerides.
igr14642.sum Combination summary report.
REMARKS concerning the IGR Orbit Combination:
---------------------------------------------
1. Broadcast ("brd") orbits/clocks are included in the combination for
statistics only. However broadcast clock corrections are used for clock
alignment to GPS time and centre clock weight determination purposes.
2. The following center solutions (orbits/clocks) were excluded from the
combination but kept for statistics:
-> Centre: IGA IGU
3. The following centre clock solutions, which provide broadcast clock
corrections, were excluded from the combination but kept in the
combination statistics:
-> Centre: NGS
4. The following clock solutions were excluded from the combination because
they were biasing the combined clock solutions (clock shifts/outliers)
but were kept for the RMS computation.
All clocks from USN.
Day | Centre | PRN/STA list
----+--------+---------------
2 | EMR | 17
2 | ESA | NKLG
2 | GFZ | DAV1
2 | JPL | 5 MCM4
5. Starting on 5-Nov-2006 (GPS Week 1400-0, MJD 54044) all IGS products,
including the IGS combined orbits, are based on the IGS realization of the
ITRF2005 reference frame (IGS05). For more information see IGSMAIL #5447.
6. Starting on 5-Nov-2000 (GPS Week 1087-0; mjd=51853) all IGS clock products
are based on the new clock combination scheme which uses the the clock
RINEX files as input if available, otherwise SP3 clocks are used.
The navigation solution is still based on the SP3 clocks but this will
soon adopt the clock RINEX files as well.
7. Starting on 5-Nov-2006 (GPS Week 1400, day 0, MJD 54044) the absolute antenna model
is introduced (IGSMAIL #5272). The antenna phase center offsets and phase center
variations are given in the file:
ftp://igscb.jpl.nasa.gov/pub/station/general/igs05.atx
ORBIT COMBINATION AND EVALUATION STATISTICS:
--------------------------------------------
Table 1: Daily transformation of each centre to the combined IGR orbit
and clocks (iga is the 24h adjusted part of Ultra Rapid,
igu is the 24h predicted part of Ultra Rapid).
WRMS - RMS weighted by the centres SP3 header accuracy codes.
STA - Number of stations in the daily solutions.
Table 1.1464.2 GPS week: 1464 Day: 2 MJD: 54494.000
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS| TOFT TDRFT SDEV RMS
| [mm] [mm] [mm] [uas] [uas] [uas] [ppb] [mm] [mm]| [ps] [ps/d] [ps] [ps]
--------+----------------------------------------------------+------------------------------
brd n/a| -12 -182 -45 395 -99 -4200-22.27 1150 1150 | 24 -38 2478 3689
cod 119| 0 0 0 -65 17 36 -.19 13 13 | -157 -691 33 100
emr 40| 2 -6 0 25 -42 11 .50 31 28 | 691 118 60 118
esa 39| 5 1 0 169 102 -42 .21 26 26 | 774 177 63 165
gfz 93| -2 0 -2 -29 -30 -10 -.10 13 13 | -198 328 32 105
iga n/a| 1 2 1 -22 21 131 -.06 13 13 | -155804 1147151 64 164
igu n/a| 3 0 -1 556 120 -556 .02 51 48 | 525941 -999999 2578 5226
jpl 45| -1 3 9 2 24 36 .46 19 17 | 3823 -68 56 157
ngs 102| 1 1 -1 35 28 10 -.47 18 16 | -155821 1146648 2398 3609
sio 70| 0 3 -4 -65 -212 -54 -.12 35 33 | 0 0 0 0
usn 45| -3 0 -13 48 64 -6 .18 34 30 | 2830 -46 81 1745
Table 2: Daily fit for each satellite and each centre resulting from weighted
average combination.
The last column gives the IGR resulting satellite accuracy measures
found in the IGS SP3 header. Eclipsing satellites are flagged with
"E" (or "M" for moon) beside the PRN number. "X" stands for excluded
from RMS, WRMS and MEDI-combination statistics but included in IGU
Units: mm
Table 2.1464.2 GPS week: 1464 Day: 2 MJD: 54494.000
Weighted Average
PRN | brd cod emr esa gfz iga igu jpl ngs sio usn IGR |
------+-------------------------------------------------------------+
1 | 878 10 23 20 10 10 36 11 12 21 27 5 |
2 | 512 9 26 30 14 11 26 26 16 76 32 10 |
3 | 859 12 34 23 8 12 60 16 16 16 30 6 |
X4 | 1162 16 37 39 16 23 26 --- 25 --- 25 10 |
5E | 3375 17 40 30 14 16 129 20 35 28 33 9 |
6 | 885 8 25 17 11 8 64 14 19 69 27 8 |
8 | 814 13 15 20 12 9 44 10 13 33 32 6 |
9 | 879 13 19 22 13 13 29 11 15 30 19 6 |
X10 |>>>>> 5 --- --- --- >>>> >>>> --- --- --- --- 0 |
11 | 806 13 39 29 22 14 86 49 18 24 56 11 |
12E | 562 16 23 27 13 11 29 24 15 30 43 8 |
13 | 787 12 35 41 14 12 34 18 15 33 50 9 |
14 | 653 13 24 23 10 12 18 12 16 29 37 6 |
15 | 861 14 30 33 13 21 72 19 19 32 41 8 |
16E | 993 14 24 26 10 11 43 19 17 31 40 7 |
17 | 823 20 71 36 14 12 30 17 24 41 33 11 |
18 | 640 11 26 31 9 11 30 16 16 29 36 7 |
19 | 562 14 28 29 11 12 28 22 17 41 25 8 |
20 | 731 11 31 28 10 13 58 18 13 21 26 6 |
21 | 1259 14 20 21 9 8 23 14 18 33 25 6 |
22 | 773 12 28 23 9 15 46 14 17 24 29 6 |
23 | 1196 11 35 26 10 14 66 19 13 29 36 7 |
24 | 1023 9 23 20 14 13 35 10 19 32 37 6 |
25 | 723 11 13 17 13 12 40 12 10 25 24 5 |
26 | 695 12 22 28 15 13 54 14 14 35 28 7 |
27 | 1591 12 14 12 14 11 44 11 13 27 24 5 |
28E | 796 11 25 14 10 15 31 22 16 37 21 6 |
X29 | 479 22 31 --- 16 --- --- 20 29 --- 40 10 |
30E | 2351 18 40 29 14 19 55 18 37 31 40 10 |
31 | 512 16 34 30 12 14 29 17 17 23 45 8 |
X32 | 692 37 69 --- --- --- --- --- 51 --- --- 34 |
------+-------------------------------------------------------------+
RMS | 1149 13 31 26 13 13 51 19 18 35 34 |
WRMS | 1149 13 28 26 13 13 48 17 16 33 30 |
MEDI | 814 13 26 26 13 12 40 17 16 30 32 |
Table 3: Daily Precise Navigation Summary using the corresponding Centre orbit
positions and satellite clock corrections at 15 min intervals.
Each line gives the daily station RMS w.r.t. the estimated coordinates
for the Latitude, Longitude and Height components.
CLK - Satellite clocks used.
EPO - Number of satellite clock epochs available for that day.
Units: mm
Table 3.1464.2 GPS week: 1464 Day: 2 MJD: 54494.0
CENT| CLK EPO | BRUS | TOW2 | WILL |
----+----------+-------------------+-------------------+-------------------+
cod | cod 2856 | 13 7 18 | 20 12 49 | 9 8 19 |
emr | emr 2864 | 30 16 50 | 22 16 68 | 10 11 14 |
gfz | gfz 2738 | 16 7 28 | 21 17 52 | 15 16 16 |
igr | igr 2841 | 23 12 40 | 19 14 72 | 12 19 34 |
jpl | jpl 2679 | 26 11 39 | 22 16 46 | 11 16 23 |
Table 4: Earth Orientation Parameters daily summary.
Daily Centre ERP, ERP Rates and LOD differences with respect to
IGR combined values.
Xpole,Xrt: x pole and x pole rate
Ypole,Yrt: y pole and y pole rate
LOD : Length Of Day
AC LOD BIAS : 21-day mean LOD bias with respect to Bulletin A
AC LOD BIAS RMS: RMS of AC LOD BIAS
FLAG: "u" (used), "x" (excluded), "-" (no submission)
for Xpole, Ypole, Xrt, Yrt and LOD
A star ("*") beside the AC name indicates that AC LOD values were
derived from AC UT1-UTC values.
Table 4.1464.2 GPS week: 1464 Day: 2 MJD: 54494.500
AC LOD AC LOD
CENT FLAG | Xpole Ypole Xrt Yrt LOD | BIAS BIAS RMS
| [uas] [uas] [uas/d] [uas/d] [us]| [us] [us]
------------+----------------------------------------+------------------
cod uuuuu | -24 82 -48 83 4 | -5 15
emr uuuuu | 8 -37 285 -283 28 | 51 54
esa uuuuu | -131 -330 407 245 -10 | 21 36
gfz uuuuu | 32 30 49 70 15 | 12 27
iga xxxxx | -55 27 -292 -35 3 | 6 16
igu xxxxx | -134 -573 -571 -659 -47 | 44 58
jpl uuuuu | 37 5 -74 142 -12 | -4 16
ngs uuuuu | -39 -48 -46 -326 -27 | 4 29
sio uuuuu | 156 139 -377 -295 32 | -7 26
usn uuuuu | -34 32 -296 117 -6 | 14 28