IRCB (Infra-Red Calibration Balloon) was an 66 cm diameter inflatable calibration sphere orbited in the Space Test Program. It was a piggy-back payload on a KH-9 (Hexagon) spysat launch. The IRCB used a LPC-509 solid rocket motor to reach its own orbit. It was inflated upon separation from the launch vehicle. It was to serve as a calibration target for various other electromagnetic remote sensing equipment. Internal battery power was provided.
|Type / Application:||Experimental|
|Operator:||USAF STP (Space Test Program)|
|Orbit:||786 km × 826 km, 94.60°|
|IRCB (S73-7)||1974-020B||10.04.1974||Va SLC-4E||Titan-3D [LPC-509]||with KH-9 8, P-11 4428|