http://www.astronautix.com/craftfam/starwars.htmProject SPIKE was a 1970's suborbital conventional warhead ASAT air-launched from an F-106 interceptor. Considerable work was done from the early 1970s under the Missile and Space Defense Program. Research centered on the miniature homing vehicle (MHV) with nonnuclear kill capability. It seems to have lead to the 1980's F-15 launched ASAT of the same concept.
http://www.astronautix.com/craftfam/starwars.htmIn May 1978, the US Joint Chiefs of Staff issued a priority list of potential Soviet target satellites for the MHV hit-to-kill ASAT then under development. The Chiefs also directed that work on begin on a "conventional ASAT", a low-risk alternative system using off-the-shelf technology. This system, employing pellets as its kill mechanism, was intended as a backup in case the MHV ran into technical or cost problems.
The $9 million High Energy Research and Technology Facility (HERTF) at Kirtland Air Force Base, New Mexico, was designed to develop weapons using high-power microwaves (HPM), high-energy advanced pulsed power (including explosive-pumped devices), and very- high-energy plasmas. Such weapons could disrupt or destroy electronic equipment aboard satellites by irradiation from directed energy sources. It may be used for ASAT experiments. Reports suggest it may constitute a covert operational ASAT system.
The facility was located in a remote canyon in the Manzano Mountains in the south-east portion of Kirtland. It was designed to withstand blasts and intense radiation. The facility had a four-story-high bay laboratory, 25 m by 45 m, with concrete roof and walls 1.3 m thick. Up to 450 kg of high explosive could be detonated in an area below the high bay to produce hundreds of megajoules of electrical energy needed for advanced experiments.