| Date: | 2002-03-15 09:07:00 | |
| Sender: | Julie Horvath/HTSI, Carey Noll/CDDIS <Carey Noll <noll@cddisa.gsfc.nasa.gov>> | |
| Subject: | [SLR-Mail] No. 910: Tracking of GRACE Satellites | |
| Author: | Julie Horvath | |
| Content: | ******************************************************************************** SLR Electronic Mail 2002-03-15 09:07:00 UTC Message No. 910 ******************************************************************************** Author: Julie Horvath/HTSI, Carey Noll/CDDIS Subject: Tracking of GRACE Satellites Dear Colleagues, As already announced in SLRMail message 0909, the launch of the two satellites, GRACE-A and GRACE-B, has been confirmed for March 16th 2002 at 09:23 UTC. Important information about these satellites: Name: GRACE-A Altitude: 485 - 500 km Inclination: 89 deg Eccentricity: < 0.005 SIC: 8003 COSPAR: 0299901 (temporary number) Npt Bin Size: 5 secs Name: GRACE-B Altitude: 485 - 500 km Inclination: 89 deg Eccentricity: < 0.005 SIC: 8004 COSPAR: 0299902 (temporary number) Npt Bin Size: 5 secs Please note: Temporary numbers will be changed after successful launch and official COSPAR numbers have been assigned and confirmed. As stated in the SLRMail, no tracking priority between GRACE-A and GRACE-B is defined, however the following alternating tracking procedure is given as a recommendation: Tracking of only one satellite at a particular SLR station per pass. If tracking has been successful, the station should switch to the other GRACE satellite in the next pass and so on. Of course, stations capable of tracking the two satellites in one pass are encouraged to do so. Acquisition data has been generated and distributed by the GFZ-1 group. Tracking should commence after separation of the two satellites from the rocket at 10:49 UTC. Regards, Julie and Carey. +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ Ms. Carey Noll Manager, Crustal Dynamics Data Information System (CDDIS) Secretary, ILRS Central Bureau Code 920.1 E-mail: noll@cddisa.gsfc.nasa.gov NASA GSFC Voice: (301) 614-6542 Greenbelt, MD 20771 Fax: (301) 614-5970 USA WWW: http://cddisa.gsfc.nasa.gov/cddis_welcome.html +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ From: Carey Noll ******************************************************************************** |