[IGSMAIL-4812]: New Report on IGS Ultra products
Gerd Gendt
gend at gfz-potsdam.de
Wed Jan 28 23:39:52 PST 2004
******************************************************************************
IGS Electronic Mail 28 Jan 23:40:07 PST 2004 Message Number 4812
******************************************************************************
Author: Gerd Gendt
Dear IGS community,
The IGS is generating since several years Ultra Rapid products.
The products comprises adjusted solutions (for a 24 hour data
part) for orbits, ERPs and clocks, and predictions of those
parameters for the next 24 hours.
The update cycle is now 12 hours and therefore the first half
of the prediction is the most interesting part (a switch to a
6 hour repetition is planned in near future).
To give the user community an overview over the quality of the
predicted orbits, the most used product, starting with week
1250 reports showing the orbit quality will be distributed as
an IGS Report each week.
For all satellites the SP3 files contain accuracy codes, which
should be used for weighting. It is especially important for
the Ultra predicted orbits, because of their larger variation
in quality compared to the other IGS orbit products (Rapids and
Finals).
For users, which are interested in the adjusted data part, it
should be mentioned that those products have already a high
quality (e.g. orbit differences to the Rapids of about 2 to 3
cm for all satellite).
Best regards
Gerd Gendt
------------------------------------------------------------------------------------------
Example for week 1251
Author: AC Coordinator / GFZ Potsdam
Ultra Rapid IGS Orbit Comparison - Week 1251 (2003 DOY:362)
Contacts: G. Gendt (gendt-potsdam.de),
Th. Nischan (nisn-potsdam.de)
Table 1. Weekly summary of the comparison between IGS Ultra Rapid
predicted orbits and IGS Rapid orbits.
Eclipsing satellites are flagged with "E" beside the PRN number
"MED" stands for median of the satellite RMS.
(only the first 12 hours of the prediction are considered)
(for more information see www.gfz-potsdam.de/igsacc)
Units: cm.
--------|----------------------------------------------------------------|
date/PRN| 1 2 3 4 5 6 7 8 9 10 11 13 14 15 16 17 |
--------|----------------------------------------------------------------|
12510_00| 9E 3 4 12E 2 6 3 3 8 2 8E 6 8 25E 2 14E|
12510_12| 11E 1 9 8E 4 3 3 4 5 1 6E 4 4 24E 4 15E|
12511_00| 6 1 4 10E 2 4 4 2 3 4 8E 4 6 28E 3 10E|
12511_12| 12 5 5 19E 2 4 4 3 4 2 8E 6 4 31E 3 15E|
12512_00| 9 6 3 17E 6 7 4 4 3 3 5E 3 6 24E 2 10E|
12512_12| 12 6 4 15E 3 3 2 3 2 2 6E 2 4 23E 5 10E|
12513_00| 3 5 2 14E 3 7 4 2 5 4 7E 3 7 26E 2 11E|
12513_12| 8 3 5 15E 3 3 6 2 2 5 6E 3 6 25E 3 15E|
12514_00| 3 4 6 21E 2 3 5 3 7 3 3E 4 6 39E 3 12E|
12514_12| 3 3 11 19E 3 5 2 2 2 2 7E 2 5 38E 2 14E|
12515_00| 4 3 5 15E 2 5 3 8 6 5 10E 4 8 42E 2 15E|
12515_12| 5 1 5 17E 2 2 2 2 3 3 8E 3 2 34E 3 14E|
12516_00| 4 2 3 21E 4 7 3 3 4 4 8E 4 5 46E 3 16E|
12516_12| 3 4 7 32E 3 3 5 3 12 4 5E 2 4 43E 4 21E|
--------|----------------------------------------------------------------|
--------|----------------------------------------------------|------------|
date/PRN| 18 20 21 22 23 24 25 26 27 28 29 30 31 |RMS WRMS MED|
--------|----------------------------------------------------|------------|
12510_00| 3 3 10E -- 9 10E 4 35 3 4 32 6 4 | 12 5 6|
12510_12| 4 3 5E -- 7 35E 4 6 6 5 30 4 3 | 11 8 5|
12511_00| 4 3 5E -- 8 18E 3 6 3 7 67 4 5 | 15 6 4|
12511_12| 3 5 6E -- 5 7E 1 7 3 6 35 2 5 | 11 5 5|
12512_00| 3 5 7E -- 7 6E 1 6 3 7 23 7 9 | 9 5 6|
12512_12| 3 4 9E -- 7 5E 3 3 2 6 25 3 4 | 8 5 4|
12513_00| 3 3 10E -- 10 5E 2 3 2 5 17 3 5 | 8 5 5|
12513_12| 5 3 16E -- 10 8E 3 2 5 6 7 3 5 | 8 5 5|
12514_00| 6 4 10E -- 10 10E 7 4 2 8 4 4 4 | 10 6 4|
12514_12| 3 5 6E -- 8 6E 4 4 6 4 4 2 3 | 9 5 4|
12515_00| 3 2 9E -- 14 7E 2 4 11 5 22 3 3 | 11 7 5|
12515_12| 4 3 4E -- 11 15E 3 6 3 5 >> 3 5 | 32 38 4|
12516_00| 3 3 10E -- 15 13E 3 9 8 4 >> 2 4 | 162 9 4|
12516_12| 6 2 31E -- 8 4E 2 5 7 4 -- 4 3 | 13 6 4|
--------|----------------------------------------------------|------------|
******************************************************************************
* Gerd Gendt *
* _/_/_/ _/_/_/_/_/_/ GeoForschungsZentrum *
* _/ _/ _/ Department Geodesy and Remote Sensing *
* _/ _/_/ _/_/ _/ Telegrafenberg A17 *
* _/ _/ _/ _/ D-14473 Potsdam , GERMANY *
* _/_/_/ _/ _/_/_/ Phone : ++49 331 288 1114 Fax :++49 331 288 1759 *
* E-Mail: gendt at gfz-potsdam.de *
* http://www.gfz-potsdam.de/pb1/igs/index_IGS.html *
* IGS Analysis Coord.: AFTP://ftp.gfz-potsdam.de/pub/igsacc *
* IGS GFZ AC : AFTP://ftp.gfz-potsdam.de/pub/igsprod *
******************************************************************************
More information about the IGSMail
mailing list