Cosmic Origins Spectrograph November 13, 2003 Page 1 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope Cosmic Origins Spectrograph NUV and FUV Pixel Drift Due to Thermal Distortion And Mechanism Post-Move Stability

Cosmic Origins Spectrograph November 13, 2003 Page 2 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift Topics Thermal and Mechanism Drift Test Approach Thermal Drift Measurements Mechanism Post-Move Stability Measurements

Cosmic Origins Spectrograph November 13, 2003 Page 3 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift Test Approach NUV imaging while COS optical bench moves from ambient (20C) to thermal equilibrium –This test is run to characterize the image motion due to thermal changes within COS (OSM1 and OSM2). –This test is run without initializing the COS mechanisms, so no image motion seen can be attributed to mechanism drift. FUV and NUV helicopter test –This test is run after COS is at thermal equilibrium, so any image motion seen can be attributed to mechanism drift FUV and NUV imaging in diamond configuration –This test is to repeat the data that was collected in the thermal vac chamber. FUV imaging while COS optical bench moves from ambient (20C) to thermal equilibrium –This test is a repeat of the first test, but capturing data on the FUV channel (OSM1 only)

Cosmic Origins Spectrograph November 13, 2003 Page 4 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Thermal Drift: Cross-Dispersion Change in Thermal Configuration Removal of Can Airflow across I/F Plate and MEB –2 radiator panel

Cosmic Origins Spectrograph November 13, 2003 Page 5 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Thermal Drift Change in Thermal Configuration Removal of Can Airflow across I/F Plate and MEB –2 radiator panel

Cosmic Origins Spectrograph November 13, 2003 Page 6 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Thermal Drift: Cross-Dispersion Change in Thermal Configuration Removal of Can Airflow across I/F Plate and MEB –2 radiator panel

Cosmic Origins Spectrograph November 13, 2003 Page 7 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Optical Bench Temperatures Change in Thermal Configuration

Cosmic Origins Spectrograph November 13, 2003 Page 8 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift Thermal Drift Performance Completed analysis of impact of worst case on-orbit drift rate (0.062C/hr during telescope slew) using measured drift rates Measured rates during temperature transitions in thermal vac: –6.9 pixels/°C (NUV), 8.9 pixels/°C (FUV) Measured drift rate during GN2 “helicopter” test –NUV: 6.8 pixels/°C (5.0 pixels/°C going cold) –FUV: TBS Thermal drift rates match analysis closely and are within budgeted values –NUV: 11.0  m/hr (prediction was 11.9  m/hr, 15.0  m/hr budgeted) –FUV: 3.3  m/hr (prediction was 2.8  m/hr, 4.2  m/hr budgeted)

Cosmic Origins Spectrograph November 13, 2003 Page 9 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift OSM Mechanism Stability

Cosmic Origins Spectrograph November 13, 2003 Page 10 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope “Helicopter” Data From 19 Nov 03

Cosmic Origins Spectrograph November 13, 2003 Page 11 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift FUV Mechanism Stability – G130M 0.7 Arcsec/hr Drift

Cosmic Origins Spectrograph November 13, 2003 Page 12 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift FUV Mechanism Stability – G160M 0.1 Arcsec/hr Drift

Cosmic Origins Spectrograph November 13, 2003 Page 13 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift FUV Mechanism Stability – G140L 0.7 Arcsec/hr Drift

Cosmic Origins Spectrograph November 13, 2003 Page 14 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift FUV Mechanism Stability – NCM Arcsec/hr Drift OSM-1 3 min wait keeps it in spec

Cosmic Origins Spectrograph November 13, 2003 Page 15 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G185M -0.9 Arcsec/hr Drift

Cosmic Origins Spectrograph November 13, 2003 Page 16 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G225M 0.6 Arcsec/hr Drift

Cosmic Origins Spectrograph November 13, 2003 Page 17 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G285M 1.3 Arcsec/hr Drift

Cosmic Origins Spectrograph November 13, 2003 Page 18 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G230L -5.3 Arcsec/hr Drift 6 Min wait keeps it in spec

Cosmic Origins Spectrograph November 13, 2003 Page 19 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – TA Arcsec/hr Drift 2 min wait keeps it in spec

Cosmic Origins Spectrograph November 13, 2003 Page 20 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift Combined Stability – NCM-1 & G285M 0. 6 Arcsec/hr of Drift OSM Arcsec/hr of Drift OSM-2 Assumes total drift is 82% OSM-1 and 18% OSM-2

Cosmic Origins Spectrograph November 13, 2003 Page 21 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope “Helicopter” Data From 20 Nov 03 Repeated NUV Stability Test

Cosmic Origins Spectrograph November 13, 2003 Page 22 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift FUV Mechanism Stability – NCM Arcsec/hr Drift OSM-1

Cosmic Origins Spectrograph November 13, 2003 Page 23 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G185M -1.7 Arcsec/hr Drift

Cosmic Origins Spectrograph November 13, 2003 Page 24 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G225M 0.23 Arcsec/hr Drift

Cosmic Origins Spectrograph November 13, 2003 Page 25 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G285M 1.2 Arcsec/hr Drift

Cosmic Origins Spectrograph November 13, 2003 Page 26 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G230L -5.5 Arcsec/hr Drift 5 min wait keeps it in spec

Cosmic Origins Spectrograph November 13, 2003 Page 27 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – TA Arcsec/hr Drift 5 min wait keeps it in spec Started count at pixels (first counts discernable off of zero time)

Cosmic Origins Spectrograph November 13, 2003 Page 28 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift Combined Stability – NCM-1 & G285M 0.4 Arcsec/hr of Drift OSM Arcsec/hr of Drift OSM-2 Assumes total drift is 82% OSM-1 and 18% OSM-2

Cosmic Origins Spectrograph November 13, 2003 Page 29 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope “Helicopter” Data From 20 Nov 03 Extra G230L Moves/Exposures Taken After Completion of NUV Exposure Set

Cosmic Origins Spectrograph November 13, 2003 Page 30 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G230L-a -5.9 Arcsec/hr Drift 9 min wait keeps it in spec

Cosmic Origins Spectrograph November 13, 2003 Page 31 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G230L-b -7.3 Arcsec/hr Drift 11.5 min wait keeps it in spec

Cosmic Origins Spectrograph November 13, 2003 Page 32 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G230L-c -7.1 Arcsec/hr Drift 10 min wait keeps it in spec

Cosmic Origins Spectrograph November 13, 2003 Page 33 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV and FUV Pixel Drift NUV Mechanism Stability – G230L-d -6.3 Arcsec/hr Drift 9.5 min wait keeps it in spec

Cosmic Origins Spectrograph November 13, 2003 Page 34 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope OSM Mechanism Stability Back-Up Charts

Cosmic Origins Spectrograph November 13, 2003 Page 35 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope Science Calibration OSM Mechanism Stability Rotary mechanism stability performance for both OSM-1 and OSM-2 during calibration testing does not consistently meet requirements: Calibration test data (which assumes all image motion is due to mechanism stability alone) indicates stability performance is different/worse now than it was for mechanism component level testing Only large moves (i.e. from optic to optic) are ever out of spec –Small FP split moves always meet spec Overall performance is not related to the pressure environment –Similar performance seen in GN2 test following calibration Component level testing was done in "helicopter" orientation, while instrument level testing was done in “cantilever" orientation –We believe this is the cause of the performance change seen in Cal Optic G140LNCM-1G130MG160M Requirement, Arcsec/hr OSM2 1.5 G

Cosmic Origins Spectrograph November 13, 2003 Page 36 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope Science Calibration OSM Mechanism Stability

Cosmic Origins Spectrograph November 13, 2003 Page 37 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope Science Calibration OSM Mechanism Stability

Cosmic Origins Spectrograph November 13, 2003 Page 38 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope FUV “Helicopter” Test G-130 Image Motion Arcseconds of Drift

Cosmic Origins Spectrograph November 13, 2003 Page 39 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope FUV “Helicopter” Test G-160 Image Motion Arcseconds of Drift

Cosmic Origins Spectrograph November 13, 2003 Page 40 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope FUV “Helicopter” Test G-140 Image Motion Arcseconds of Drift

Cosmic Origins Spectrograph November 13, 2003 Page 41 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV “Helicopter” Test NCM-1 Image Motion Arcseconds of Drift Note: NCM-1 Image motion is measured at the NUV Detector with the OSM-2/G285 optic in place

Cosmic Origins Spectrograph November 13, 2003 Page 42 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV “Helicopter” Test G185 Image Motion Arcseconds of Drift

Cosmic Origins Spectrograph November 13, 2003 Page 43 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV “Helicopter” Test G225 Image Motion Arcseconds of Drift

Cosmic Origins Spectrograph November 13, 2003 Page 44 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV “Helicopter” Test G285 Image Motion Arcseconds of Drift

Cosmic Origins Spectrograph November 13, 2003 Page 45 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV “Helicopter” Test G230 Image Motion Arcseconds of Drift

Cosmic Origins Spectrograph November 13, 2003 Page 46 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV “Helicopter” Test TA-1 Image Motion Arcseconds of Drift

Cosmic Origins Spectrograph November 13, 2003 Page 47 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV “Helicopter” Test G285 and NCM-1 Image Motion Arcseconds of Drift OSM Arcseconds of Drift OSM-2 Assumes total drift is 82% OSM-1 and 18% OSM-2

Cosmic Origins Spectrograph November 13, 2003 Page 48 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope FUV “Helicopter” Test Motor Temperatures OSM1 Rotary OSM1 Focus Cal Platform Cal Cover Ap Mech Move to G130 Move to G160 Move to G140

Cosmic Origins Spectrograph November 13, 2003 Page 49 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope FUV “Helicopter” Test Non-Motor Temperatures DEB Interface Plate Opt Bench DVA Move to G130 Move to G160 Move to G140

Cosmic Origins Spectrograph November 13, 2003 Page 50 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope NUV “Helicopter” Test Motor Temperatures OSM1 Rotary OSM1 Focus Ap Mech Move to G185 Move to G225 Move to TA-1 Move to G285 Move to G230 Move to NCM-1 And G285 OSM2 Rotary Move to NCM-1

Cosmic Origins Spectrograph November 13, 2003 Page 51 “Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure” Hubble Space Telescope FUV “Helicopter” Test Non-Motor Temperatures NUV Box Interface Plate Opt Bench NUV Tube NUV Bulkhead Move to G185 Move to G225 Move to TA-1 Move to G285 Move to G230 Move to NCM-1 And G285 Move to NCM-1