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

**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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