| Date: | 2001-03-13 17:24:00 | |
| Sender: | Graham Appleby, Roger Wood, Philip Gibbs <slr@slrb.rgo.ac.uk (SLR Herstmonceux)> | |
| Subject: | [SLR-Mail] No. 750: PREDICTION EXPLODER: Consequential changes to NERC products | |
| Author: | Graham Appleby, Roger Wood, Philip Gibbs | |
| Content: | ******************************************************************************** SLR Electronic Mail 2001-03-13 17:24:00 UTC Message No. 750 ******************************************************************************** Author: Graham Appleby, Roger Wood, Philip Gibbs Subject: PREDICTION EXPLODER: Consequential changes to NERC products PREDICTION EXPLODER: Consequential changes to NERC products In line with the changes proposed in Scott Wetzel´s recent SLRMAIL 749 announcing the implementation of an ILRS exploder for all ILRS prediction products, we announce here a number of minor changes to the products currently generated by the NERC group. Please contact us if you have any problems with any of our products. Please note that we have taken this opportunity to change our identifier from RGO to NERC. IRVs We will continue to provide the following predictions: Daily IRVs for most satellites (derived from SLR observations) Monthly IRVs for most satellites (derived from SLR observations) Daily IRVs for GPS-35,36, Campaign GLONASS (derived from CODE orbits) Subdaily IRVs for GPS-35,36,Campaign GLONASS (derived from CODE orbits) Thus typical subject header for the email messages will be: STARLETTE DAILY IRVS NERC TOPEX MONTHLY IRVS NERC GPS35 DAILY IRVS CODE/NERC GLONASS-84 SUBDAILY IRVS CODE/NERC We also propose to use slightly changed (and more self-consistent) internal labelling of IRV sets in the first line of the IRV files. Thus for the above files the first lines of the IRV files will be: New: | Old: NERCDY_STR072 1 | RGOTST_STR001 1 NERCMY_TOP139 1 | RGOIRV_TOP139 1 COD11051 GPS35 1 | COD11051 GPS35 1 COD11051 GLO84 4 | GLO11051 GLO84 4 | where the NERC daily IRVs are numbered with the day-in-year; and the CODE derived IRVs with the GPS week and day number. TIME BIAS FUNCTIONS We will continue to receive time bias functions (TBFs) from providers, concatentate them with the ones we produce here, and distribute them at 1600 UT each day as previously. The subject header for these messages will remain unchanged as: Standard Time Bias Functions and the format of the contents will be unchanged. | ========================================================= -O- ========= | NERC Space Geodesy Facility /| | | Herstmonceux Castle / | | Hailsham / | | East Sussex ( / / /) | | UK BN27 1RP ( /_/ / ) | | Tel: +44 (0)1323 833888 ( |O| / ) | | Fax: +44 (0)1323 833929 ================= | | Email: slr@slrb.rgo.ac.uk == == | | Web: http://nercslr.nmt.ac.uk/ = = | ======================================================================= From: slr@slrb.rgo.ac.uk (SLR Herstmonceux) ******************************************************************************** |