Stacksat (POGS & SSR /
TEX / SCE) [Joel Powell]
The U.S. military's STACKSAT mission involved the launch of three similar spacecraft, POGS & SSR, TEX and SCE.
The satellites, based on DSI's Maestro bus, are gravity gradient stabilized. Body mounted solar arrays provide ~15 W orbit average power. Originally the mission was to consist of only two spacecraft and to be launched on a Scout-G1 booster. As all available Scout launchers in the inventory had already been assigned to other missions, an Atlas-E rocket became available. This rocket, which could not be used for any other msission due to a lower than normal thrust of one of its engines, was fitted with the Altair-3A (Star-20A) upper stage inherited from the original Scout launch vehicle. The resulting Atlas-E Altair-3A combination had a higher performance than the Scout, so that a third satellite could be added.
Six low cost ground stations were designed, built and located around the world to operate these spacecraft.
|Type / Application:||Technology|
|Power:||Solar cells, batteries|
|Lifetime:||1 year (design); 3 years (goal)|
|POGS & SSR (Stacksat 1, USA 56, P87-2)||1990-031A||11.04.1990||Va SLC-3W||Atlas-E Altair-3A||with TEX, SCE, PDD|
|TEX (Stacksat 2, USA 57, P87-2)||1990-031B||11.04.1990||Va SLC-3W||Atlas-E Altair-3A||with POGS & SSR, SCE, PDD|
|SCE (Stacksat 3, USA 58, P87-2)||1990-031C||11.04.1990||Va SLC-3W||Atlas-E Altair-3A||with POGS & SSR, TEX, PDD|