ILRS Mission Priorities as of August, 2005

Priority Mission Sponsor Altitude
(km)		 Inclination
(degrees)		 Comments
1 GP-B NASA/Stanford U. 642 90  
2 GRACE-A/B GFZ/JPL 485-500 89 tandem mission*
3 CHAMP GFZ 429-474 87.27  
4 GFO-1 US Navy 790 108.0 altimetry/no other tracking technique
5 Envisat ESA 796 98.6 tandem with ERS-2*
6 ERS-2 ESA 800 98.6 tandem with ENVISAT*
7 Jason NASA/CNES 1,350 66.0 tandem with Topex*
8 TOPEX/
Poseidon		 NASA/CNES 1,350 66.0 tandem with Jason*
9 Larets IPIE 691 98.204 - the effective cross-section is 1.1x10 in 6 m2; - RMS distance error (target error) is < 5 mm; - COM correction is 56.2mm; - satellite brightness in reflected sunlight varies from 8m to 14m depending on phase; - satellite mass is 23.28kg
10 Starlette CNES 815-1,100 49.8  
11 Stella CNES 815 98.6  
12 Meteor-3M IPIE 1000 99.64 No other tracking technique
13 Ajisai JAXA 1,485 50  
14 LAGEOS-2 ASI/NASA 5625 52.6  
15 LAGEOS-1 NASA 5850 109.8  
16 Beacon-C NASA 950-1300 41 upgraded from a campaign to
ongoing mission (Jan 2002)
17 Etalon-1 Russian
Federation		 19,100 65.3  
18 Etalon-2 Russian
Federation		 19,100 65.2  
19 GLONASS-89 Russian
Federation		 19,100 65 replaced GLONASS86
as of 20 March 2003
20 GLONASS-87 Russian
Federation		 19,100 65 replaced GLONASS88
as of 20 February 2002
21 GLONASS-95 Russian
Federation		 19,100 65 replaced GLONASS84
as of 26 August 2005
22 GPS-35 US DoD 20,100 54.2  
23 GPS-36 US DoD 20,100 55.0  

Lunar Tracking Priorities

Priority Retroreflector Array Sponsor Altitude(km)
1 Apollo15 NASA 356,400
2 Apollo11 NASA 356,400
3 Apollo14 NASA 356,400
4 Luna21 Russian Federation 356,400
5 Luna17 Russian Federation 356,400