SECOR 5 & SEV

SECOR (Sequential Collation of Range), EGRS (Electronic & Geodetic Ranging Satellite) were small geodetic spacecraft used to precisely determine points on the earth. SEV (Scout Evaluation Vehicle) was a NASA launch vehicle evaluation payload to test a new version of the Scout launch vehicle and performing new maneuvers during launch. Primary purpose of the experiment was to demonstrate in flight the operation of a number of improved vehicle features which had been developed for the Scout program.