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The COmet Nucleus TOUR (CONTOUR) spacecraft carries two imagers, CONTOUR Remote Imager/Spectrometer (CRISP) and CONTOUR Forward Imager (CFI). Each imager has a similar Data Processing Unit (DPU). This document describes the software features common to these two DPUs. Included are descriptions of telemetry, commands, support processing, and the boot program.
For all multi-bit or multi-byte numbers, the first byte sent has the most numerical significance; this is so-called "big-endian" format. This convention applies to arguments in commands, data in telemetry, and messages over the 1553 bus.
Return to Common Software User's Guide.
Report problems to John Hayes.