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Here are details about a :
Space commemorative cover
or Space Cover.

the flag of USA
Cosmodrom : USA

Date of Cancellation: Dec. 5, 1975
Kind of Event : Launch
Launch pad : USA Vandenberg (CA)
habité?/manned?: robot
Mission type : Failure

ou?/where?: au sol - ground
autographe?: non - none

Description : The DAD A (Dual Air Density Explorer-A) satellite was a 0.76 m rigid sphere designed to determine, in conjunction with DAD B (Dual Air Density Explorer-B), the vertical structure of the upper thermosphere and the lower exosphere as a function of latitude, season, and local solar time. Both satellites would have been launched by a single Scout-F1 launch vehicle into coplanar polar orbits. Measurements of atmospheric density from DAD-A would have been obtained from satellite drag analyses near perigee (approximately 350 km) and from composition measurements taken by an onboard mass spectrometer. DAD-A was equipped with a radio beacon to facilitate tracking.
Vandenberg post stamp and atmosphere DAD.

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This will be featured in a future Space Revue.

Last modified: 10/19/2014 @ 01h40

ask if availablepurchase this item USA  824  6,-  

     item shown right here with picture.
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enveloppe USA 824 - cover USA 824
USA 824

Page : future · Ref: USA  824 

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Space Event :


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