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AXAF Project Science: Summary of IAPs during HRMA Calibration
AXAF Project Science: Summary of IAPs during HRMA Calibration
Initial Alignment Positions of AXAF High-Resolution Mirror Assembly (HRMA) during Calibration at the X-Ray Calibration Facility (XRCF).
| Phase-IAP | Date, GMT | Pitch | Yaw | dX | |
| Established | arcmin | arcmin | mm | Comments | |
| 1-IAP0 | 0.0 | 0.0 | 0.000 | Aligned X-ARM, HRMA fixed on blocks | |
| 1-IAP1 | 364 18:00 | 0.0 | 0.0 | 0.000 | Aligned X-ARM, original pre-vacuum IAP |
| 1-IAP2 | 001 05:00 | -1.1 | -1.3 | 0.000 | Initial failure IAP, calculated from encoder counts |
| 1-IAP3 | 001 12:15 | -1.5 | -0.5 | 0.000 | X-ray alignment test, change -0.4 pitch and +0.8 yaw wrt 1-IAP2 |
| 1-IAP4 | 002 18:22 | 0.0 | 0.0 | 0.000 | Aligned X-ARM |
| 1-IAP5 | 005 16:11 | 0.0 | -1.0 | 0.000 | X-ray quadrant-balance test, change -1.0 yaw wrt 1-IAP4 |
| 1-IAP6 | 026 08:08 | 0.0 | -1.0 | 0.000 | Same as 1-IAP5, but encoders zeroed with rack off |
| 1-IAP7 air | 027 20:00 | 0.0 | 0.0 | 0.000 | Aligned X-ARM air, GSE @ 70 F |
| 1-IAP7 | 028 15:01 | 0.0 | 0.0 | 0.000 | Aligned X-ARM, GSE @ 67 F |
| 1-IAP7a | 029 16:52 | 0.0 | 0.0 | 0.000 | Aligned X-ARM, GSE @ 55 F (Yaw 47 arcsec from 1-IAP7) |
| 1-IAP7b | 029 20:32 | 0.0 | 0.0 | 0.000 | Aligned X-ARM, GSE @ 54 F (Pitch 7 arcsec from 1-IAP7a) |
| 1-IAP8 | 036 18:00 | 0.0 | 0.0 | 0.000 | Aligned X-ARM, GSE @ 52.5 F (Encoders nonzero at home) |
| 2-IAP1 | 053 17:38 | 0.0 | 0.0 | 0.000 | Aligned X-ARM |
| 2-IAP2 | 058 23:16 | 0.0 | 0.0 | 0.203 | Aligned X-ARM, HRMA axial displacement when setting IAP |
| 2-IAP3 | 059 17:38 | 0.0 | 0.0 | 1.549 | Aligned X-ARM, HRMA axial displacement when setting IAP |
| 2-IAP4 | 064 20:38 | 0.0 | 0.0 | 0.076 | Aligned X-ARM, HRMA axial displacement when setting IAP |
| 2-IAP5 | 079 15:00 | 0.0 | 0.0 | 0.000 | Aligned X-ARM |
| 2-IAP6 | 091 05:15 | 0.0 | 0.0 | 0.000 | Aligned X-ARM, special IAP for ghost-image search |
| Note a: | Column 1 gives Calibration phase hyphen Initial Alignment Position sequence number. | ||||
| Note b: | Columns 3 and 4 give HRMA pitch and yaw relative to XRCF Alignment Reference Mirror (X-ARM). | ||||
| Note c: | Column 5 gives axial error resulting from incorrect software algorithm for HRMA actuators. |
Last Update: 08 June 1998
Name: Steve O'Dell
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Editor: Dr. Douglas Swartz System Administrator: Mr. Bob Dean Privacy Policy and Important Notices Accessibility Statement |
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