Scheduler-oriented night summary of lsstcam on 20250817¶

This report is a summary of a night of observing designed to understand scheduler behavior during the night, identify scheduler problems, and otherwise monitor scheduler performance.

MJD LST UTC Chile/Continental
event
sunset 60904.927583 229.723394 2025-08-17 22:15:43.180000+00:00 2025-08-17 18:15:43.180000-04:00
sun_n12_setting 60904.967031 243.963351 2025-08-17 23:12:31.438000+00:00 2025-08-17 19:12:31.438000-04:00
sun_n18_setting 60904.986462 250.977873 2025-08-17 23:40:30.327000+00:00 2025-08-17 19:40:30.327000-04:00
sun_n18_rising 60905.411767 44.506936 2025-08-18 09:52:56.690000+00:00 2025-08-18 05:52:56.690000-04:00
sun_n12_rising 60905.431173 51.512315 2025-08-18 10:20:53.390000+00:00 2025-08-18 06:20:53.390000-04:00
sunrise 60905.470551 65.726975 2025-08-18 11:17:35.593000+00:00 2025-08-18 07:17:35.593000-04:00
moonrise 60905.322566 12.306639 2025-08-18 07:44:29.720000+00:00 2025-08-18 03:44:29.720000-04:00
moonset 60905.729104 159.060937 2025-08-18 17:29:54.579000+00:00 2025-08-18 13:29:54.579000-04:00
night_middle 60905.199067 327.725184 2025-08-18 04:46:39.387000+00:00 2025-08-18 00:46:39.387000-04:00
index visit_id exposure_name controller day_obs seq_num physical_filter band s_ra s_dec ... start_date HA observationStartDatetime64 start_timestamp overhead ring_healpix nest_healpix dayObs day_obs_mjd day_obs_iso8601

0 rows × 235 columns

Visit map¶

No visits

The above plots show the visits collected during the night in two different representations, modeled after physical observing tools.

  • The "Armillary sphere" shows the sphere in orthographic projection, with the center point of the projection controlled by the "center alt" and "center az" sliders beneath the plot. A static orthogrophic projection is not an equal-area projection, but playing with the sliders is a helpful way to inform a human's spatial reasoning in three dimensions.
  • The "Planisphere" shows the sky in Lambert Azimuthal Equal Area Projection, centered at the south celestial pole, with R.A. increasing counterclockwise. The projection used is equal area, but highly distorted near the north celestial pole (outside the LSST footprint). This is a particularly helpful representation for planning observing, because changes in time in relevant features are simple rotations, without alterations in distortion, and there are no discontinuities anywhere in the footprint at any time of year.

Both plots show the footprints of camera pointing taken up to the time set by the MJD slider, with the most recent three pointings outlined in cyan. The fill colors are set according to the RTN-45:

  •     blue: u band
  •     green: g band
  •     red: r band
  •     yellow: i band
  •     pink: z band
  •     brown: y band

Both plots have the following additional annotations:

  • The gray background shows the planned final depth of the LSST survey.
  • The orange disk shows the coordinates of the moon.
  • The yellow disk shows the coordinates of the sun.
  • The green line (oval) shows the ecliptic.
    • The sun moves along the ecliptic in the direction of increasing R.A. (counter-clockwise in the planisphere figure) such that it makes a full revolution in one year.
    • The moon moves roughly (within 5.14°) along the ecliptic in the direction of increasing R.A. (counter-clockwise in the planisphere figure) , completing a full revolution in one sidereal month (a bit over 27 days), about 14° per day.
  • The blue line (oval) shows the plane of the Milky Way.
  • The black line shows the horizon at the time set by the MJD slider.
  • The red line shows a zenith distince of 70° (airmass=2.9) at the time set by the MJD slider.

Value timelines¶

Select a value to plot using the dropdown above the plot on the left.

No visits

Survey Progress¶

Map numbers of visits accumulated so far¶

Each subplot represents the progress in the survey in a different filter, presented in a Lambert Azimuthal Equal Area Projection, centered at the south celestial pole.

Annotations are similar to those of the "Visit Map" above:

  • Black outlines show the camera footprint of each exposure taken on this night.
  • The blue backdrop represents the accumulated effective exposure time, teff (as defined above) at the start of the night.
  • The orange disk shows the coordinates of the moon.
  • The yellow disk shows the coordinates of the sun.
  • The green line (oval) shows the ecliptic.
  • The blue line (oval) shows the plane of the Milky Way.
  • Broken red ovals show a zenith distince of 70° (airmass=2.9) at morning and evening 12° twilight.
    • The dashed portions of each red oval show the extent of what is observable at all during the night.
    • As time progress through the night, the ZD circle maintains its shape, moving counter-clockwise around the pole over the course of the night.

Map the most recent visit so far¶

No visits

Each subplot represents the time since the most recent visits to each point in the sky, by filter, presented in a Lambert Azimuthal Equal Area Projection, centered at the south celestial pole.

Parts of the sky visited most recently are dark blue, growing fainter and grayer for areas visited less recently. Regions not visited in the last 10 days are not colored.

Other features and annotations are the same as those of the depth map, above.

DDF Cadence¶

The y-axis (height of the vertical bars) represents the accumulated effective exposure time, teff (as defined above) accumulated over all exposures on the field for the night, colored by filter.