The Integrated Test and Operations System (ITOS) is a satellite telemetry and command system. It has been used on more than 30 NASA projects, from CubeSats to Great Observatories. It is appropriate for use during the entire mission life cycle from development labs to on-orbit operations. ITOS also is a very capable closed-loop, scripted simulator that can simulate an entire observatory or a particular subsystem.
This software is only available for use by federal employees and contractors to the federal government working on projects where this tool would be applicable.
U.S. Government Purpose Release
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Goddard Space Flight Center