The two Dragsphere satellites were small passive satellites to measure the effects of atmospheric drag.
Both spheres had the same geometric dimensions, but had a different mass. Dragsphere 1 had a mass of only 0.9 kg, while Dragsphere 2 had a mass of 9.5 kg. They were launched piggy-back with Transit-O 1 into 1000 km orbit.
After 30 years, the orbit of the more massive Dragsphere 2 remained nearly unchanged, while the light Dragsphere 1 orbit was lowered by about 50 km.
|Type / Application:||Air density research|
|Operator:||Naval Research Laboratory (NRL)|
|Contractors:||Naval Research Laboratory (NRL)|
|Mass:||0.9 kg (#1); 9.5 kg (#2)|
|Orbit:||1054 km × 1084 km, 89.93° (#1); 1056 km × 1086 km, 89.97°|
|Dragsphere 1||1964-063C||06.10.1964||Va 75-1-2||Thor-DSV2A Able-Star||with Transit-O 1, Dragsphere 2|
|Dragsphere 2||1964-063E||06.10.1964||Va 75-1-2||Thor-DSV2A Able-Star||with Transit-O 1, Dragsphere 1|