ILRS Mission Priorities

Priority	Mission	Sponsor	Altitude (km)	Inclination (degrees)	Comments
1	GRACE-A/B	GFZ/JPL	485-500	89	tandem mission*
2	CHAMP	GFZ	429-474	87.27
3	GFO-1	US Navy	790	108.0	altimetry/no other tracking technique
4	Envisat	ESA	796	98.6	tandem with ERS-2*
5	ERS-2	ESA	800	98.6	tandem with Envisat*
6	Jason	NASA/CNES	1,350	66.0
7	ANDE-RR Active	NRL	400	51.6
8	ANDE-RR Passive	NRL	400	51.6
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	Ajisai	JAXA	1,485	50
13	LAGEOS-2	ASI/NASA	5625	52.6
14	LAGEOS-1	NASA	5850	109.8
15	Beacon-C	NASA	950-1300	41	upgraded from a campaign to ongoing mission (Jan 2002)
16	Etalon-1	Russia	19,100	65.3
17	Etalon-2	Russia	19,100	65.2
18	GLONASS-89	Russia	19,100	65	replaced GLONASS86 as of 20 March 2003
19	GLONASS-99	Russia	19,100	65	replaced GLONASS87 as of 12 January 2007
20	GLONASS-95	Russia	19,100	65	replaced GLONASS84 as of 26 August 2005
21	GPS-35	US DoD	20,100	54.2
22	GPS-36	US DoD	20,100	55.0
23	GIOVE-A	ESA	29,601	56

Lunar Tracking Priorities