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Update twilight definitions in targetmask YAML #164
Description
The file desitarget/data/targetmask.yaml contains the following:
#- Observing conditions
#- These are a bitmask to allow target bits to specify multiple conditions
#- in which they are allowed to be observed.
#- See DESI-0311 and DESI-0333 for discussion of DARK vs. GRAY
obsconditions:
- [DARK, 0, "Moon is down"]
- [GRAY, 1, "Moon up; illum fraction<0.6 and (illum*elev)<30 deg"]
- [BRIGHT, 2, "Moon up and bright (not GRAY)"]
- [POOR, 3, "Very bad seeing, high extinction, or bright cloud cover"]
- [TWILIGHT12, 4, "Between sunset/sunrise and 12 degree twilight"]
- [TWILIGHT18, 5, "Between 12 and 18 degree twilight"]
- [DAY, 6, "Daytime calibrations"]
- [CLOSED, 7, "Nighttime but dome is closed due to rain, wind, dew..."]
- [APOCALYPSE, 8, "Conditions are so bad that the world is ending anyway"]
We are currently using 13deg and 15deg twilight in the afternoon planner (desisurvey.afternoonplan), so this issue is to review the twilight defns, and get everything in synch.
Activity
geordie666 commentedon May 14, 2020
@dkirkby: This seems like an easy issue to solve and I'm embarrassed that I've left it hanging for 3 years! Is
desisurveystill using 13deg and 15deg twilight definitions? Should I update the definitions in thedesitargetyaml file (which won't affect anything else indesitargetspecifically, I think).