desi-${DOCDB_NUMBER}.dat¶
Overview¶
Patrol disk / fiducial positions on focal surface z1
Creators¶
- Extracted from DESI docdb-530 (or 865 for protodesi)
Users¶
- PlateMaker
Contents¶
Table columns¶
| Keyword | Sample value | Units | Description |
|---|---|---|---|
| device_location_id | 0 | positioner id | |
| device_type | POS | POS = Positioner, FIF = Fiducial, GIF = guider fiducial, OPT, NON = ignore | |
| X | 28.134375 | ||
| Y | 5.201437 | ||
| Z | -0.082419 | ||
| precis | 10.474479 | atan(y/x) | |
| nutat | 0.252067 | tilt relative to focal plane? | |
| spin | -10.474479 | -1*precis (rotation needed to return positioner to x=0 orientation) |
Storage and access¶
Preferred file representation¶
| Name template: | desi-${DOCDB_NUMBER}.dat |
|---|---|
| Format: | space delimited text |
| Example: | desi-530.dat |
| Path: | DervishTools/trunk/desi/etc/desi-530.dat |
