1. Ames Research Center Airborne Sensor Facility MAS History 2001-2003 Texas 2001 (“Half-MASTER”) 4&5/01 5/01-7/01 –Recoat all foreoptics –Refocused all optics –New port 3 dewar –Grounding Issues –BB and ER2 control cross cabled CLAMS-CAMEX4 – 7/9-9/26/01 10/01-6/02 –Port 2 dewar serviced –Grounding isolation –RF shielding –PCVA eliminated –SCSI and disk issues

2. Ames Research Center Airborne Sensor Facility MAS History 2001-2003 (cont.) Crystal / Dryden 7/1-8/12/02 8/02-10/02 –Fix ch 45 in Port 4 - 8/02 –Vibration testing - 10/21 –Port 3 fails - 10/23/02 –Port 4 vacuum accidentally dumped during window replacement Texas 11/19-12/12/02 12/13/02- 1/03 –2 nd Dichoric & port 4 mirror replaced –Port dewar de-watered at EG&G Judson –Full spectral alignment –Port 4 grating adjusted –More ground and RF isolation Thorpex 2/1-4/10/03 –CO2 clean implemented

3. Ames Research Center Airborne Sensor Facility Port 3 Trunion Failure Found during post vibration test spectral check Support screw found to have worn alignment hole Dewar base swapped with spare dewar ---- worn

4. Ames Research Center Airborne Sensor Facility Port 4 Problems Lost considerable response Loss of signal reduced BB spread and increased noise Vacuum Bakeout by EG&G eliminated the problem

5. Ames Research Center Airborne Sensor Facility Vibration Testing Oct 18-21 3 axis to 0.1G sin Port 3 trunion found loose afterwards Minor electrical interference in setup No measurable effect any other port

6. Ames Research Center Airborne Sensor Facility Failing Sprectrometer Optics (Post-THORPEX) Port 3 MirrorPort 2 mirror

7. Ames Research Center Airborne Sensor Facility Current Engineering Issues BB Spikes reduced but not gone Time Spikes – need gps time Missing Scan lines – SCSI Burp Descending Scanlines Engineering subsystems erratic Need to implement effective disk house preflight pressure check Resolve Hemisphere Picoamp meter scaling issue

8. Ames Research Center Airborne Sensor Facility Resolved Issues PCVAs eliminated Coherent noise greatly reduced Temporary fix to RFI implemented Hard Disk failures linked to pressurization loss

9. Ames Research Center Airborne Sensor Facility MAS Summer ’03 Maintenance Tasks (System down July 30 – Sept. 30) Optics replacement: Port 2 lens, Ports 1-3 mirrors, Port 1 grating, Port 2 orings Other Tasks: port 2 lens defogger, RF shielding upgrade, explore tare improvement Cold BB testing Dry air environment for calibrations New GPS and Roll/Synchro chips

10. Ames Research Center Airborne Sensor Facility Summer Schedule

11. Ames Research Center Airborne Sensor Facility MAS Optics

12. Ames Research Center Airborne Sensor Facility New Optical Spares (with costs) 1 st Dichroic - $2,650 ea - 4 2 nd Dichroic - $3,650 ea - 4 3 rd Dichroic - $2,550 ea - 4 1 st Grating - $2,400 ea - 1 2 nd Grating - $2,400 ea - 1 3 rd Grating - $2,400 ea - 1 4 th Grating - $2,400 ea - 1 Prt 2 window - sapphire - 0 Prt 3 window - $3,375 ea - 3 Prt 4 window - #3,335 ea - 4 Folding Mirror - $735 ea - 6 Pfund rework - $5,400 - 1 Scan Mirror – in process Primary Parabolic - 2 Prt 2/3 array - $1,300ea – 3? Spare port 2/3 dewar - TBD Spare port 4 LVF – 0 Spare port 4 dewar - $? - 0 Lens 1 $32,000 - 0 Lens 2 Reworked $13,000 Lens 3 $27,000 - 0 Lens 4 $30,000 - 0

13. Ames Research Center Airborne Sensor Facility Dewars Procuring Spare arrays port 2/3 Soon to start building spare port 2/3 Judson has expressed interest in building another port 4 Pavel has found another LVF vendor

14. Ames Research Center Airborne Sensor Facility Electronic Spares QuadADC: (many; shared with MASTER) DDX-B: 2 TCIO - none – (obsolete card) Main CPU (Adastra): 1- (obsolete) BB Monitor – obsolete- no solid spares Preamps – 1 card only for port 2/3 Most other components adequate