[INSTRM-1191] Actually launch sunss/iic commands based on telescope status Created: 18/Feb/21 Updated: 18/Feb/21 |
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| Status: | In Progress |
| Project: | Instrument control development |
| Component/s: | ics_sunssActor |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Task | Priority: | Normal |
| Reporter: | cloomis | Assignee: | cloomis |
| Resolution: | Unresolved | Votes: | 0 |
| Labels: | SuNSS | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Issue Links: |
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| Story Points: | 2 | ||||||||
| Description |
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We currently have two proposed observing strategies for sunss: The default is simply to take nominally 1200s exposures (to be adjusted for sky brightness) while the telescope is open, without tracking the sky with the SuNSS rotator. This always works, but does not give good imaging fiber data. The second is to track new fields when the telescope slews to them. Currently by tracking the telescope coordinates and starting an iic exposure when the drive starts Guiding and stopping the iic exposure when the drive starts Slewing. This should give some good imaging fiber data, but we will have to deal with pointings being interrupted in various ways, and rotator tracking limits. There will be several variations on those (e.g. opening and closing shutters to see if we are Slewing to a new field or just doing something local). But we should start with wiring those two in for unattended observing. |
| Comments |
| Comment by rhl [ 18/Feb/21 ] |
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In the short term any sky photons are welcome. In the longer term, I think that we'll want to go with the "track new fields" proposal, although if there are many very short exposures this may not actually work. We should be able to get the statistics from the observatory. Another option is to always rotate at the proper rate whenever we slew to a field, even if we don't readout. That way stars will stay in their fibres, and multiple fields just simulate more crowding. |
| Comment by cloomis [ 18/Feb/21 ] |
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Always rotating at the right rate is appealing and can't hurt I don't think. To be honest I'd like to defer fully automating that because it requires paying more attention to the pi routines (limit switch, etc) than I am prepared to do right now.... |