Pre-night briefing report for dayobs 20260221¶
Sunset: 23:20:46Z, evening 12°: 00:18:29Z, morning 12°: 09:34:50Z, Sunrise: 10:32:34Z
| MJD | LST | UTC | Chile/Continental | |
|---|---|---|---|---|
| event | ||||
| sunset | 61092.972764 | 71.335221 | 2026-02-21 23:20:46.792164+00:00 | 2026-02-21 20:20:46.792164-03:00 |
| sun_n12_setting | 61093.012837 | 85.800961 | 2026-02-22 00:18:29.090424+00:00 | 2026-02-21 21:18:29.090424-03:00 |
| sun_n18_setting | 61093.033595 | 93.294515 | 2026-02-22 00:48:22.632898+00:00 | 2026-02-21 21:48:22.632898-03:00 |
| sun_n18_rising | 61093.378432 | 217.775764 | 2026-02-22 09:04:56.560733+00:00 | 2026-02-22 06:04:56.560733-03:00 |
| sun_n12_rising | 61093.399197 | 225.271625 | 2026-02-22 09:34:50.655488+00:00 | 2026-02-22 06:34:50.655488-03:00 |
| sunrise | 61093.439292 | 239.745047 | 2026-02-22 10:32:34.792280+00:00 | 2026-02-22 07:32:34.792280-03:00 |
| moonrise | 61093.657237 | 318.420293 | 2026-02-22 15:46:25.295695+00:00 | 2026-02-22 12:46:25.295695-03:00 |
| moonset | 61093.071306 | 106.907486 | 2026-02-22 01:42:40.825445+00:00 | 2026-02-21 22:42:40.825445-03:00 |
| night_middle | 61093.206028 | 155.540133 | 2026-02-22 04:56:40.792222+00:00 | 2026-02-22 01:56:40.792222-03:00 |
Sun α=335.0°, δ=-10.0° Moon α=28.0°, δ=17.0°
| RA | dec | alt | az | phase | |
|---|---|---|---|---|---|
| sun | 335.140715 | -10.327957 | -49.560732 | 179.895583 | NaN |
| moon | 28.365787 | 16.792520 | -39.933036 | 267.215593 | 32.888182 |
Nominal start and overhead, ideal conditions, run at 2026-02-21T07:01:06-08:00
| sim_creation_day_obs | 2026-02-21 |
|---|---|
| daily_id | 3 |
| visitseq_label | Nominal start and overhead, ideal conditions, run at 2026-02-21T07:01:06-08:00 |
| visitseq_url | s3://rubin:rubin-scheduler-prenight/opsim/vseq/simonyi/2026-02-21/02c82c13-3cf0-4b31-a28b-0ab286d4d42d/visits.h5 |
| telescope | simonyi |
| first_day_obs | 2026-02-21 |
| last_day_obs | 2026-02-23 |
| creation_time | 2026-02-21 15:08:58.452855+00:00 |
| scheduler_version | |
| config_url | None |
| sim_runner_kwargs | None |
| conda_env_sha256 | |
| parent_visitseq_uuid | 42720e46-7787-4cf8-ba9e-3474473a0f71 |
| parent_last_day_obs | 2026-02-20 |
| tags | ['ideal', 'nominal', 'prenight', 'rewards'] |
| visitseq_uuid | 02c82c13-3cf0-4b31-a28b-0ab286d4d42d |
Additional files available
| Â | URI |
|---|---|
| rewards | s3://rubin:rubin-scheduler-prenight/opsim/vseq/simonyi/2026-02-21/02c82c13-3cf0-4b31-a28b-0ab286d4d42d/rewards.h5 |
Software used to run the simulation
| package_name | Â |
|---|---|
| python | 3.13.9 |
| numpy | 2.3.5 |
Software used to generate this report
| package_name | Â |
|---|---|
| python | 3.12.11 |
| rubin-scheduler | 3.22.0 |
| rubin-sim | 2.6.2a5 |
| schedview | 2.6.2a5 |
Comments recorded in the simulation metadata database
Number of exposures: 829, Mean gap time: 11.04 seconds, Median gap time: 6.78 seconds
| Open shutter of first exposure | 2.16 minutes after 12 degree evening twilight |
|---|---|
| Close shutter of last exposure | 0.28 minutes before 12 degree morning twilight |
| Total wall clock time | 9.23 hours |
| Number of exposures | 829 |
| Total open shutter time | 6.69 hours |
| Mean gap time | 11.04 seconds |
| Median gap time | 6.78 seconds |
Map of the visits¶
Map key and instructions
The above plots show the visits collected during the night in two different representations, modeled after physical observing tools.
- The map on the left 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. Use of this map resembles use of an armillare sphere.
- The map on the right shows the sky in Lambert Azimuthal Equal Area Projection, centered at the south celestial pole, with R.A. increasing counterclockwise (because Rubin Observatory is in the southern hemisphere). 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. Use of this map resembles use of a planisphere.
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:
- Â Â Â aqua: u band
- Â Â Â green: g band
- Â Â Â red: r band
- Â Â Â blue: i band
- Â Â Â purple: z band
- Â Â Â black: 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%deg;) 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%deg; 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%deg; (airmass=2.9) at the time set by the MJD slider.
Timeline plot¶
Horizon plot¶
Altitude plot¶
Rewards by survey¶
The plot represents the reward (or maximum value of the reward, if the reward is a healpix map rather than a scalar) for each survey with which the scheduler is configured, for each call to the scheduler used to schedule visits on this night.
The horizonatal axis shows the times the scheduler call requested an observation for (not the time at which the call to the scheduler was made). Each horizontal line shows a timeline of reward values for a given survey.
- Red x's mark infeasible surveys, surveys that cannot be scheduled on the requested time.
- Gray triangles show rewards with an infinite positive value.
- Colored vertical bars represent other values, with limits set by the slider along the bottom of the plot. Both the height and color of the bar are mapped to the value of the reward, and value can also be read by hovering the mouse cursor over the bar.
- Black vertical bars represent rewards that are above the specified color/bar height limit set by the slider (but not infinite), while a red vertical bars represent values below the requested range (but still feasible).
Rewards by basis function¶
The following figures show the rewards (or maximum values of the rewards, if the rewards are healpix maps) for each basis function contribution to each survey.
The horizonatal axis shows the times the scheduler call requested an observation for (not the time at which the call to the scheduler was made). Each horizontal line shows a timeline of reward values for a given survey.
- Red x's mark basis functions which mark a survey as infeasible, such that the survey cannot be scheduled on the requested time.
- Gray triangles show rewards with an infinite positive value.
- Colored vertical bars represent other values, with limits set by the slider along the bottom of the plot. Both the height and color of the bar are mapped to the value of the reward, and value can also be read by hovering the mouse cursor over the bar.
- Black vertical bars represent rewards that are above the specified color/bar height limit set by the slider (but not infinite), while a red vertical bars represent values below the requested range (but still feasible).
Feasible area by basis function¶
The following figures show the area on the sky (in square degrees) for each basis function is feasible..
The horizonatal axis shows the times the scheduler call requested an observation for (not the time at which the call to the scheduler was made). Each horizontal line shows a timeline of reward values for a given survey.
- Red x's mark basis functions no area on the sky is feasible.
- Blue cirles show basis functions that are feasible over the entire sky, for example those with finite scalar values.
- Colored vertical bars represent other values, with limits set by the slider along the bottom of the plot. Both the height and color of the bar are mapped to the area, and value can also be read by hovering the mouse cursor over the bar.
- Black vertical bars represent rewards that are above the specified color/bar height limit set by the slider (but not infinite), while a red vertical bars represent values below the requested range (but still feasible).