This page is very old and much work has been done on the active optics system, including a major upgrade in 2014. The value of the information here is uncertain.
German Schumacher
5 December 1995
The following table lists the hour angles and declinations at which IMAN measurements should be taken in order to calibrate the lookup tables for 4MAP (the 4M Active Primary mirror support system). The HA and Dec entries are chosen to give an equally spaced grid in azimuth and zenith distance; azimuth varies as you move vertically through the table and zenith distance as you move horizontally.
Start and end at zenith. In between, do the following:
|
|
AZIM/ZD | 15 | 30 | 45 | 60 | |
| HA (h m) | 0 | 0 00 | 0 00 | 0 00 | 0 00 | |
| DEC (d m) | -15 09 | -00 09 | 14 50 | 29 50 | ||
| WEST | 30 | 0 31 | 0 58 | 1 24 | 1 52 | |
| -16 57 | 03 29 | 10 01 | 23 24 | |||
| 60 | 0 55 | 1 45 | 2 31 | 3 16 | ||
| -21 55 | -12 39 | -02 50 | 07 04 | |||
| 90 | 1 08 | 2 14 | 3 16 | 4 13 | ||
| -29 01 | -25 47 | -20 48 | -14 33 | |||
| 120 | 1 04 | 2 19 | 3 38 | 4 56 | ||
| -36 40 | -40 38 | -41 22 | -38 43 | |||
| 150 | 0 40 | 1 40 | 3 17 | 5 30 | ||
| -42 46 | -54 03 | -62 13 | -64 06 | |||
| 180 | 0 00 | 0 00 | 0 00 | 0 00 | ||
| -45 09 | -60 09 | -75 09 | -89 50 | |||
| EAST | 210 | -0 40 | -1 40 | -3 17 | -5 30 | |
| -42 46 | -54 03 | -62 13 | -64 06 | |||
| 240 | -1 04 | -2 19 | -3 38 | -4 56 | ||
| -36 40 | -40 38 | -41 22 | -38 43 | |||
| 270 | -1 08 | -2 14 | -3 16 | -4 13 | ||
| -29 02 | -25 47 | -20 48 | -14 33 | |||
| 300 | -0 55 | -1 45 | -2 31 | -3 16 | ||
| -21 55 | -12 39 | -02 50 | 07 04 | |||
| 330 | -0 31 | -0 58 | -1 24 | -1 52 | ||
| -16 57 | -03 29 | 10 01 | 23 24 |