The DECalS Software for the Dark Energy Survey Spectrophotometric Calibration System

DECalS is a fully automated remote control program for the Dark Energy Survey spectrophotometric calibration system (DECal). Expected to be used roughly once a month to calibrate the Dark Energy Camera, DECalS provides a TCP/IP server with commands to give the user access to all aspects of the calibration. There is a separate "expert mode” used for installation and debugging purposes. Data gathered from the DECal system will track changes in the throughput of the compete optical path of the telescope system.