Sasha Geukjian Sasha Geukjian [email protected] [email protected].
Lessons Learned: Gravity Probe B Data Analysis October 15, 2005 Sasha Buchman
-
Upload
neve-wagner -
Category
Documents
-
view
26 -
download
1
description
Transcript of Lessons Learned: Gravity Probe B Data Analysis October 15, 2005 Sasha Buchman
Page 2
The Relativity Mission ConceptThe Relativity Mission Concept
ee R
R
R
Rc
GIR
Rc
GM 232
132
3
241
2
1v
Launched April 20, 2004Start Science August 27, 2004Liquid He exhausted September 29, 2005
Page 4
The Instruments: GPB and LISA
13 mHz 0.1 mHz-1 Hz
• 4 Gyroscopes • 6 GRS
• 1 Telescope • 6 Telescopes
• 1 Spacecraft • 3 Spacecraft
• Thermally Controlled • Thermally Controlled
• 4 SQUIDs
• 3 Interferometers
• 9 DOF Control • 57 DOF Control
Page 5
The Data: GPB and LISA
13 mHz 0.1 mHz-1 Hz
• 2 kbytes/sec TDRSS @ 2-12 hours/day DSN
• 32 kbytes/sec direct ground @ 4/day
• ~ 700 sensors
• ~ 10,000 monitors
• Regular data: 0.1-1 Hz
• Snapshots: 220-2200 Hz
• >100,000 commands
• ~ 1 Terabytes/year recorded
Page 6
Recommendations
• Extensive ground simulator with hardware in the loop
• Full instrumentation of all systems
• Comprehensive periodical instrument calibrations
• Maximum instrumentation data to ground
• Fast data snapshots to ground
• Critical data processing on the ground
• Maximum ‘instrument time’ allocation in Data Analysis