The very dramatic reduction on the size of electronics and their concurrent increase in complexity and capability are making possible multi-function satellites in very small volumes. The CubeSat program was born as this complex electronic environment was birthing. CubeSat is a small, 10cm cube 1/12 the volume of the previous "small" AMSAT Microsat program of 1990. Owing to the small size and mass it has become financially possible to launch these satellites on small budgets. AMSAT is now in the process of exploring this field and size of satellites as finding launches for our previous designs has become nearly impossible. While the size of these satellites has been reduced, the complexity of the thermal design and the supporting analyses has not really diminished at all. This paper will document the thermal design and analyses of the AMSAT Fox-1 program. This paper is an update of the one presented last year at the Space Symposium.
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