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Invertibility.md

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Invertibility

This document contains all the invertibility requirements, and exact details on how they are to be obtained

  • VISP only for now for simplicity
  • BLOCKED (Scott?): polarimetricAccuracy is null everywhere. Wait for fix and next update. We need to pass it through to the dataset view

TELESCOPE

L1 doesn't reject any data based on quality measurements. It simply provides a report on the quality so scientists can decide what to do.

Metadata GraphQL GraphQL Values Header Header Values
Health health [*Health] DSHEALTH GOOD, BAD, ILL, UNKNOWN
GOS Status gosStatus [*GosStatus] GOS_STAT open, opening, closed, closing, undefined
AO Locked aoLocked [*AoLocked] AO_LOCK True, False

Criteria

  • Health: ~75% of frames should be GOOD
  • GOS: 100% of the frames should be open
  • AO: ~75% of the frames should be locked = True

INSTRUMENT

Metadata GraphQL GraphQL Values Header Header Values
Health
Stokes stokesParameters [I,Q,U,V] STOKES I,Q,U,V
Stokes hasAllStokes bool STOKES I,Q,U,V
  • There is no separate instrument health. Use telescope health
  • All stokes parameters must be present

QUALITY

Metadata GraphQL GraphQL Values Header Header Values
Light Level lightLevel Distribution LIGHTLVL float
Polarimetric Sensitivity polarimetricAccuracy Distribution POL_SENS float
Polarimetric Sensitivity qualityAveragePolarimetricAccuracy float POL_SENS float
Humidity
  • Distrubtion {min, p25, median, p75, max}
  • If the scientist running the experiment has allowed it to complete, these probably aren't the best indication that the dataset is good or bad.
  • Pass both of these through so we can observe what normal values are but do not disqualify

SPATIAL

Metadata GraphQL Values
Solar X-Center
Solar Y-Center
FOV Width
FOV Height
FOV Height
Slit Width
On Disk boundingBox ((x1,y1),(x2,y2)) (arcseconds, string)
Slit Horizon Azimuth
  • Off-disk is when they block the sun's light and measure just to the side of it, to isolate atmosphere
  • boundingBox is in coordinates from the sun's center.
  • radius of the sun changes depending on the time of year

SPECTRAL

Inversion is possible only when certain spectral lines are observed

Band Min Center Max Required ViSP
CaII 8542 8535 8542 8550 Yes
CaII 8498 8493 8498 8502 Optional
FeI 6297 6302 6305 Yes
Metadata GraphQL GraphQL Values Header Header Values
Wavelength Min wavelengthMin nm
Wavelength Max wavelengthMax nm
Wave Band WAVEBAND "Ca II (854.21 nm)"
Spec LN SPECLN
  • Wait N days for datasets to become available before processing, hoping CaII 8498 becomes available
  • Data must contain midpoint to continue