| Date: | 1999-11-06 15:38:00 | |
| Sender: | Mike Pearlman, Secretary ILRS Central Bureau <[Mailed Mike Pearlman <mpearlman@cfa.harvard.edu>]> | |
| Subject: | [SLR-Mail] No. 482: INCREASE in ETALON 1 & 2 Priority from 31 October to 30 November | |
| Author: | Mike Pearlman, Secretary ILRS Central Bureau | |
| Content: | ******************************************************************************** SLR Electronic Mail 1999-11-06 15:38:00 UTC Message No. 482 ******************************************************************************** Author: Mike Pearlman, Secretary ILRS Central Bureau Subject: INCREASE in ETALON 1 & 2 Priority from 31 October to 30 November JohnLuck@auslig.gov.au Dear Colleagues, The ILRS Governing Board has approved a one month tracking campaign to support the WPLTN participation in the ”Asia Pacific Regional Geodetic Project 1999” (APRGP99). In addition to the WPLTN requirement, the members of the Governing Board would also like to assess the tracking potential on the Etalon satellites for future campaigns. During this one-month campaign, from 31 October to 30 November, the priorities of Etalon 1 and 2 will be increased to priorities 13 and 14, ahead of the GLONASS and GPS satellites. THIS CHANGE IN PRIORITIES TAKES PLACE IMMEDIATELY. Predictions are available through the normal channels. If you have any questions or difficulty, contact the Central Bureau. We need your participation. APRGP99 has been organized by the Geodesy Working Group of the Permanent Committee on GIS Infrastructure for Asia and the Pacific (PCGIAP). APRGP99 follows two previous successful campaigns APRGP97 and APRGP98, to establish positional values within a global reference frame for a basic network of permanent geodetic stations across the Asia and Pacific region. The campaigns are supported by an increasing number of government agencies within the region. APRG99 is important for adding new stations, for refining station velocity values, for height variations, and for comparison and combination of techniques. Enhanced ETALON tracking has been requested to strengthen Earth rotation solutions and orbit parameters in combination with LAGEOS. The added Etalon data will provide strengthened global solutions into which the regional results can be adjusted. Dr. Michael R. Pearlman Harvard-Smithsonian Center for Astrophysics 60 Garden St. Cambridge MA 02138 tel. (617) 495-7481 fax. (617) 495-7105 e-mail. mpearlman@cfa.harvard.edu [Mailed From: ”Mike Pearlman” ******************************************************************************** |