| Date: | 2001-11-28 09:29:00 | |
| Sender: | Carey Noll <Carey Noll <noll@cddisa.gsfc.nasa.gov>> | |
| Subject: | [SLR-Mail] No. 843: ILRS Mission Support of GRACE | |
| Author: | Carey Noll | |
| Content: | ******************************************************************************** SLR Electronic Mail 2001-11-28 09:29:00 UTC Message No. 843 ******************************************************************************** Author: Carey Noll Subject: ILRS Mission Support of GRACE Dear Colleagues: The ILRS Governing Board has approved tracking of the GRACE mission, presently scheduled for launch in early 2002. SLR will complement GPS tracking in support of POD for gravity field recovery. Strategies to track the two closely separated satellites are under discussion within the SLR community. The SLR Mission Support Request submitted by the GRACE mission team is included below. More information about the mission can be found at the web sites: http://www.csr.utexas.edu/grace/ http://op.gfz-potsdam.de/grace/index_GRACE.html Regards, Carey Noll. Secretary, ILRS Central Bureau --------------------------------------------------------------------- Name: GRACE (Gravity Recovery And Climate Experiment) Host: NASA Primary Tech Contact: Byron Tapley, UTCSR Primary Science Contact: Byron Tapley, UTCSR Alternate Tech Contact: Ab Davis, NASA/JPL Alternate Science Contact: Christoph Reigber, GFZ Tech Mailing Address: University of Texas at Austin, Center for Space Research, 3925 W. Braker Lane, Ste. 200, Austin, TX, 78759, USA Science Mailing Address: University of Texas at Austin, Center for Space Research, 3925 W. Braker Lane, Ste. 200, Austin, TX, 78759, USA Tech Fax: +1(512) 232-2443 Science Fax: +1(512) 232-2443 tech email: tapley@csr.utexas.edu science email: tapley@csr.utexas.edu Tech Web_Address: http://www.csr.utexas.edu/grace/ Science Web_Address: http://www.csr.utexas.edu/grace/ mission objectives: GRACE is a joint US/German satellite mission which will provide global high resolution estimates of the Earth´s gravity field and its variability in time. For a detailed outline see http://www.csr.utexas.edu/grace/ or http://op.gfz-potsdam.de/grace/index_GRACE.html mission role: Complementary tracking system to onboard GPS for POD and for GPS data validation launch date: Early 2002 mission duration: 5 years altitude: 500 - 300 km inclination: 89.0 degrees eccentricity: < 0.005 tracking sched: Start of SLR tracking immediately after separation of S/Cs spatial cov: Global temporal cov: All times data accuracy: Millimeter to centimeter ranging accuracy coordinator: Rolf Koenig, GFZ priority: Complementary to GPS data source: GFZ POD source: GPS Analysis Center: UTCSR npt time span: 5 s tracking requests: All delivery time: 0.5 h after data take at ILRS data centers array info: 4 cube corner prism array, nadir facing. See http://op.gfz-potsdam.de/grace/index_GRACE.html tech contact for array info: Ludwig Grunwaldt array contact number: grun@gfz-potsdam.de ; +49-331-288-1733 Comments: Drawing of satellite and array for mission planning purposes is available on http://op.gfz-potsdam.de/grace/index_GRACE.html A proposal for scheduling twin tracking of both S/C is in process. +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ Ms. Carey Noll Manager, Crustal Dynamics Data Information System (CDDIS) 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 ******************************************************************************** |