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List of satellites which have provided data on the magnetosphere

1γ = 10^-5 oersted = Dynamic range of instrumentation

**List of US and USSR Satellites and Probes That Have Provided Data on the Geomagnetic Field**
Satellite	Launch Date	Inclination of Orbital Plane to Earth's equator	Lifetime (days)	Range (γ)	Sensitivity	Distance R_E
Sputnik III[?]	5-15-58	65°	30	<60,000	5%	<1.3
Pioneer I	10-11-58	Earth impact	1	<1000	1%	3.7-7.0
Lunik I	1-2-59	Solar orbit	1	<6,000	200γ	3-6
Explorer VI[?]	8-7-59	47°	61	<20,000	3%	2-7.5
Lunik II	9-12-59	Lunar impact	1.4	<1,500	50γ	3-6
Vanguard III[?]	9-18-59	33	85	10,000-60,000	4γ	<1.8
Pioneer V[?]	3-11-60	Solar orbit	50	<1,000	0.05-5γ	5-9
Explorer X[?]	3-25-61	33	2.2	30-5,000	3γ	1.8-7
Explorer XII[?]	8-16-61	33	112	±500	10γ	4-13.5
Alouette	9-29-62	80	Still operating	60,000	0.3%	1.17
Explorer XIV[?]	10-3-62	33	300	±250	5γ	5-16.5

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