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[IGSMAIL-5710]: IGS Ultra Combination (IGU): 1466 3 00 (Resubmission Resubmission)
- To: igsmail @ igscb.jpl.nasa.gov
- Subject: [IGSMAIL-5710]: IGS Ultra Combination (IGU): 1466 3 00 (Resubmission Resubmission)
- From: igsacc @ gfz-potsdam.de (Gerd Gendt3)
- Date: Wed, 13 Feb 2008 12:58:29 +0100
- Sender: owner-igsmail
- User-agent: Heirloom mailx 12.3 7/15/07
******************************************************************************
IGS Electronic Mail 13 Feb 03:58:37 PST 2008 Message Number 5710
******************************************************************************
Author: AC Coordinator / GFZ Potsdam
sum-file Version 2.0
Ultra Rapid IGS Orbit Combination - Week 1466 Day: 3 Hour: 00 (Feb 13, 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:
igu14663_00.sp3 IGR GPS ephemeris in SP3 format.
igu14663_00.erp Earth Rotation Parameters (ERP) and their rates as well as
Universal Time (UT1-UTC) and Length Of Day (LOD) associated
with IGS ephemerides.
igu14663_00.sum Combination summary report.
REMARKS concerning the IGU Orbit Combination:
---------------------------------------------
1. The following centre clock solutions, which provide broadcast and/or
predicted clock corrections, were excluded from the combination but kept
in the combination statistics:
-> Centre: GOU COU
2. The following orbit solutions were excluded from the combination because
less than 3 ACs have submitted results for given satellite(s).
The following table lists the exclusions:
Centre | PRN list
--------+---------------
COU | 32
3. 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.
4. 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 IGU orbit
and clocks.
WRMS - RMS weighted by the centres SP3 header accuracy codes.
STA - Number of stations in the daily solutions.
Table 1.1466.3 GPS week: 1466 Day: 3 MJD: 54509.000
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]
--------+----------------------------------------------------+------------------------------
cou 76| 0 0 4 -35 59 164 -.09 54 53 | 0 0 --- 6246
emu 45| 3 0 1 -70 24 -16 .20 32 36 | 2084 -3740 --- 0
esu 40| -3 0 0 163 3 -98 .29 70 70 | 3155 -1445 --- 1817
gou 79| 1 0 -1 15 -47 -37 -.14 22 22 | -321 -8593 --- 82430
siu 62| 0 -1 0 396 131 -280 .31 121 100 | 0 0 --- 0
usu 32| 4 -1 1 -597 -274 596 .08 165 158 | 599 -1228 --- 2853
Table 2: Daily fit for each satellite and each centre resulting from weighted
average combination.
The last column gives the IGU 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 2.1466.3 GPS week: 1466 Day: 3 MJD: 54509.000
Weighted Average
PRN | cou emu esu gou siu usu IGU |
------+------------------------------------+
1 | 39 31 45 21 56 145 18 |
2 | 60 28 33 32 81 109 19 |
3 | 48 45 56 18 270 131 33 |
4 | 52 19 29 15 160 82 20 |
5 | 56 28 65 12 139 118 22 |
6 | 43 20 44 18 119 116 19 |
8 | 58 48 37 25 69 214 25 |
9 | 44 21 55 15 52 118 16 |
10 | 49 33 47 16 134 84 20 |
11 | 68 24 110 20 150 157 28 |
12 | 50 41 57 28 125 266 29 |
13 | 48 40 33 22 70 277 26 |
14 | 41 20 68 16 52 130 17 |
15 | 55 37 71 39 98 134 24 |
16E | 47 26 109 13 182 95 27 |
17 | 59 23 44 16 141 326 32 |
18 | 51 23 87 16 84 203 24 |
19 | 76 19 47 21 59 89 18 |
20 | 48 24 81 30 82 182 23 |
21 | 50 23 79 26 70 149 21 |
22 | 58 25 74 20 39 127 19 |
X23 | 60 47 --- 16 241 326 45 |
24 | 48 25 64 16 73 118 18 |
25 | 57 36 34 28 57 144 20 |
26 | 44 43 120 21 121 84 26 |
27 | 67 56 40 38 64 219 27 |
28E | 57 42 85 14 76 190 25 |
X29 | 56 --- 68 --- 147 202 58 |
30 | 62 39 124 17 33 108 24 |
31 | 48 25 71 21 281 171 35 |
X32 | ---- --- --- --- --- --- 0 |
------+------------------------------------+
RMS | 54 32 70 22 121 165 |
WRMS | 53 36 70 22 100 158 |
MEDI | 51 28 64 20 82 134 |
Table 3: Earth Orientation Parameters daily summary.
Daily Centre ERP, ERP Rates and LOD differences with respect to
IGU 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.
Remark: COU submits ERP-products for 00 and 12 UT only,
for 06 and 18 UT extrapolations are used.
Table 3.1466.2 GPS week: 1466 Day: 2 MJD: 54508.500
AC LOD AC LOD
CENT FLAG | Xpole Ypole Xrt Yrt LOD | BIAS BIAS RMS
| [uas] [uas] [uas/d] [uas/d] [us]| [us] [us]
------------+----------------------------------------+------------------
cou uuuuu | -1 30 0 319 -5 | -2 17
emu uuuuu | -5 45 120 -72 -16 | -2 28
esu* uuuuu | 84 -93 -314 -748 -33 | 69 117
gou uuuuu | -24 -6 -5 169 7 | -5 21
siu uuuuu | -99 -384 -85 -439 40 | 71 78
usu uuuuu | 279 539 257 141 7 | -2 19
Table 3.1466.3 GPS week: 1466 Day: 3 MJD: 54509.500
AC LOD AC LOD
CENT FLAG | Xpole Ypole Xrt Yrt LOD | BIAS BIAS RMS
| [uas] [uas] [uas/d] [uas/d] [us]| [us] [us]
------------+----------------------------------------+------------------
cou uuuuu | -213 -22 -147 67 132 | -2 17
emu uuuuu | -101 181 -147 68 131 | -2 28
esu* uuuuu | -304 -534 -657 -453 -80 | 69 117
gou uuuuu | 230 34 344 69 35 | -5 21
siu uuuuu | -511 -606 -518 -263 75 | 71 78
usu uuuuu | 434 919 133 137 -248 | -2 19