RBSP Radiation Belt Storm Probes RBSP Radiation Belt Storm Probes RBSP/EFW I-PER 21 January EFW Flight Software Summary Peter Harvey Space Sciences Laboratory University of California, Berkeley

RBSP/EFW I-PER 21 January 2011Harvey 112 FSW Overview Development Plan : RBSP_EFW_001_SMP Heritage : CRRES, Polar, Cluster, THEMIS Language: Z80 Requirements: 193 Level 3 Effort : SLOC in 22 modules & include files (596 pages) Test Platform: ETU Quality : Integrated with Flight Development Major Functional Requirements: – Command Reception & Distribution – Real-Time Data Collection and Playback – On-Board Evaluation for Burst Triggering – Burst Data Collection and Playback – Sine-Wave Fits of E-Field & Mag Signals – Spacecraft Potential Calculation – Data Compression – Boom Deployment Control – Space Weather Packet – Backup EMFISIS Magnetometer

RBSP/EFW I-PER 21 January 2011Harvey 113 Commands and Telemetry TM: bps - RT: 6763 bps PB: 5237 bps

RBSP/EFW I-PER 21 January 2011Harvey 114 CPU Utilization CPU Performance –Based upon 16.8 MHz processor –Measurements made on RBSP ETU DCB –Calculations in RBSP_EFW_FSW_004_Analyses.xls –Using Worst Case Compressable Data (10:1 compression) –Nominal Spin Rate (12 seconds) for Spin Fits

RBSP/EFW I-PER 21 January 2011Harvey 115 Memory Resources PROM/EEPROM PROM Functions EEPROM Load Uplink Support L&EO Functions EEPROM/Uplink One-Time Events Test Programs Initialization Params Science Upgrades RESOURCE NEEDS 48% PROM 49% RAM 0% EEPROM

RBSP/EFW I-PER 21 January 2011Harvey 116 Computer Resources

RBSP/EFW I-PER 21 January 2011Harvey 117 Action Items/Changes Status of Action Items Since CDR AI-8 : Required Long Duration Stress Test Completed 11/11/2009 Requirements Changes Since CDR EFW-206: Updated default “old data” as 42 days not 17 DFB-21: Added DCB-to-DFB Synchronization message TM-8: Real-time data increased from 6.2 to 6.7 kbps : Playback reduced from 5.7 kbps to 5.2 kbps : Meets “370 samples/sec” requirement w/ compression

RBSP/EFW I-PER 21 January 2011Harvey 118 FSW Action Item Long Duration and Stress Test (I-CDR AI #8) –Include a long duration as well as stress tests of FSW (maybe combined) –Maureen Bartholomew

RBSP/EFW I-PER 21 January 2011Harvey 119 Requirements of Test Test Requirements Length : 72 Hours Activities : High Rate of Commands High Rate of Telemetry Include Event Messages Include Memory Dumps Include CPU intensive Processing Pass/Fail Criteria : No Errors No Memory Leaks

RBSP/EFW I-PER 21 January 2011Harvey 120 Long Duration Stress Test High Rate of Commands –Command Pass Simulation Every Hour –Memory Load – Uplink of Script Database (1KB) –Serial Commands – 32 commands/sec for 60 seconds –Memory Dump Script Database –Execute Script and Verify Results High Rate of Telemetry –Continuous Telemetry at 200% nominal (24 Kbps) –Real Time 200% (12 Kbps) –Burst 200% (12 Kbps) CPU Intensive Processing –Spin Fit 200% (6 second period) –Spacecraft 200% (6 second period) –Burst Triggers (All 6 formulae active w/ 10 terms ea) (200% nominal) –Bias Sweeps every 30 minutes, Highest Frequency Possible –Data Compression Enabled on All Packets –SDRAM and SRAM Memory Scrubbing Enabled Verification –Test Status Logged Every Hour (72 reports) –No Errors in FSW or GSE –No Memory Leaks (by design, there is no dynamic memory allocation)