Skynet SGEMP test program: The skynet satellite as test object

In 1974, the residual SKYNET I qualification model satellite became the keystone 'real satellite' analytical and test speciment in the DNA-Sponsored satellite SGEMP investigation program. Ford Aerospace provided the satellite, plus detailed information on the design and fabrication and assembly methods to co-contractors IRT, Mission Research Corporation (MRC), the Army Harry Diamond Laboratories (HDL), and Pulsar Associates. Such details were used in a three-pronged effort: (1) IRT used the design details to establish computer code models of SKYNET, and these codes were used to predict SKYNET's SGEMP response; (2) HDL conducted current-injection tests to establish the structural and cable response characteristics; (3) low-energy X-ray irradiation of the satellite was conducted by MRC and IRT to: (a) validate the assumption that 'tin-can' models can be effectively used to represent a real satellite for establishing satellite response; (b) demonstrate that the essential satellite response measurements can be made on an isolated satellite within a reasonable vacuum chamber; and (c) obtain the electromagnetic response of the satellite resulting from spacecraft charging.