A discussion of advanced sensing methods in spacecraft testing, with guidelines for their comparison. The guidelines include the state of development, cost, and range of application over a series of tests running from engineering design verification to in-flight monitoring. Infrared, acoustic, magnetic, electromagnetic, and chemical sensing methods are evaluated, as well as integral sensor technology and the use of single-parameter testing. This comparison shows that infrared thermometry appears most useful for the widest range of application. 51 pp. Bibliog.