Optical Data Used in JGM-2 and EGM96

(ordered by inclination)

Satellite Name	Semimajor Axis (km)	Eccentricity	Inclination (deg)	No. of Obs.
Courier-1B	7469	0.016	28.3	2,470
Vanguard 2	8298	0.164	32.9	1,290
Vanguard 2RB	8496	0.183	32.9	681
D1-D	7341	0.053	40.0	6,032
D1-C	7622	0.084	39.5	2,692
BE-C	7507	0.025	41.2	7,505
Telstar-1	9669	0.243	44.8	3,946
Echo-1RB	7966	0.012	47.2	4,468
Anna-1B	7501	0.008	50.1	4,043
Geos-1	8075	0.071	59.3	60,737
Transit-4A	7322	0.008	66.8	3,831
Injun-1	7316	0.008	66.8	3,264
Secor-5	8151	0.079	69.2	721
BE-B	7354	0.014	79.7	1,734
OGO-2	7341	0.075	87.4	1,204
Oscar-7	7440	0.002	89.2	1,851
5BN-2	7462	0.006	90.0	818
Midas-4	9995	0.011	95.8	31,749
Geos-2	7711	0.031	105.8	61,431
OVI-2	8317	0.018	144.3	962
Total				201,429

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