DS-1 (Dnepropetrovsk Sputnik 2) is the first development version of the Dnepropetrovsk Sputnik series.
The purpose of these satellites were to evaluate the standardized DS satellite bus and the new Kosmos launch vehicle.
The second DS-1 satellite was lost during a launch failure on 27 October 1961 at Kapustin Yar. The launch vehicle didn't reach orbital velocity due to the failure of an acceleration integrator in the velocity regulation control.
The second DS-1 satellite was lost during a launch failure on 21 December 1961 at Kapustin Yar. The oxidizer of the second stage was exhausted before orbital velocity could be reached due to uncontrolled pumping of liquid oxygen into the combustion chamber. The upper stage and satellite impacted in the Kurile Islands.
|Type / Application:||Technology|
|Kosmos (1a) (DS-1 #1)||1961-F11||27.10.1961||KY Mayak-2||F||Kosmos|
|Kosmos (1c) (DS-1 #2)||1961-F15||21.12.1961||KY Mayak-2||F||Kosmos|