Control & Data Handling, Control & Data Handling, Operator Control, Operator Control, Aircraft Interface to C&DH Aircraft Interface to C&DH Steve Musko Space Physics Research Laboratory University of Michigan Ann Arbor, MI USA College of Engineering Space Physics Research Laboratory Department of Atmospheric, Oceanic & Space Sciences LRR-X Internal Concept Review NASA Goddard Space Flight Center 23 April 2002
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Control & Data Handling, Operator Control, Aircraft Interface to C&DH Steve Musko Space Physics Research Laboratory University of Michigan Ann Arbor, MI.
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Control & Data Handling,Control & Data Handling,Operator Control, Operator Control,
Aircraft Interface to C&DHAircraft Interface to C&DH
Steve Musko
Space Physics Research Laboratory
University of Michigan
Ann Arbor, MI USA
College of EngineeringSpace Physics Research Laboratory
Department of Atmospheric, Oceanic & Space Sciences
LRR-X Internal Concept ReviewNASA Goddard Space Flight Center
• Collect– Science data from the correlator board– Analog housekeeping values from the analog I/O board– Time and position from the GPS receiver– Aircraft status from RS-232 port
• Combine science data, analog housekeeping, GPS time and position and aircraft status into real-time telemetry (TM) packets and one-minute TM files
• Store TM files in flash memory• Communicate with operator laptops via Ethernet
– Receive and execute commands – Transmit real-time TM packets to laptops– Support bulk FTP data uploads from flash memory
- Applications, drivers and OS components arearchitecturally equivalent- All processes run in separate memory spaces- Processes are much less likely to crash each other- OS features and drivers can be added dynamically- All interprocess communication is accomplishedusing microkernel message passing
• TM packets are combined into one minute TM files and stored on flash disk. Filenames are derived from TM packet time tags.
• All TM packets are transmitted in real time to the operator laptop computers
• TM files on flash disk can be uploaded to the the operator laptop computers using FTP any time the instrument is powered up (even while the LRR-X application is running).
• There is a single TM packet type that contains science data, housekeeping, GPS time and position and aircraft status
• Set PID temp loop control values• Set truncation map values• Set Test Control Register value• Execute command script (for nested scripts)• Start data collection• Stop data collection