Scheduler-oriented night summary of lsstcam on 20260121¶
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.
Basic Stats¶
No survey visits
Visit map¶
No visits
The above plots show the visits collected during the night in two different representations, modeled after physical observing tools.
- The Orthographic projection on the left is intended to be used as a virtual armillary sphere: a spherical representation of the sky whose orientation with respect to the horizon can be shown as a function of time. The time for which the orientation applies is set by the "Date and time (UTC)" slider, and the orientation from which the user views the figure is controlled by the "center alt" and "center az" sliders, which set the coordinates of the center of the figure. The figure is always oriented so zenith us "up" on the screen. The 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 Lambert Azimuthal Equal Area Projection on the left, centered at the south celestial pole, is intended to be used as a virtual planisphere, with the "Date and time (UTC)" slider setting the time. R.A. increases 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:
- Â Â Â blue: u band
- Â Â Â green: g band
- Â Â Â red: r band
- Â Â Â brown: i band
- Â Â Â purple: z band
- Â Â Â teal: y band
Both plots have the following additional annotations:
- The thick gray lines show the boundries of different areas of the LSST footprint.
- 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.
Night visit metric maps¶
In all of the maps that follow, annotations are similar to those of the "Visit Map" above:
- Black outlines show the camera footprint of each exposure taken on this night.
- The orange disk shows the coordinates of the moon.
- The brown 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.
Map of numbers of visits on night¶
No survey visits on this night.
Map on number of bands on night¶
No survey visits this night
Map of depth as inverse variance of noise (effective exposure time)¶
The following map shows accumulated inverse variance of visits completed on this night, a uniformly increasing measure of progress toward a target limiting coadd limiting magnitude. The inverse variance of the noise is increases linearly with the number of exposures for exposures of uniform depth, and total exposure time when noise is dominated by sky brightness, and so is sometimes scaled to a time under reference conditions and called the "effective exposure time." See DMTN-296: Calculations of Image and Catalog Depth for more details.
Map of number of bands completed twice on night¶
No bands observed twice
Value timelines¶
Select a value to plot using the dropdown above the plot on the left.
No visits
Survey Progress¶
In all of the maps that follow, annotations are similar to those of the "Visit Map" above:
- Black outlines show the camera footprint of each exposure taken on this 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.
Maps begin "collapsed": to unfold them, click on the title of the desired projection.
Total numbers of visits accumulated so far¶
Total visits accumumlated so far
Total accumulated visits in u band
Total accumulated visits in g band
Total accumulated visits in r band
Total accumulated visits in i band
Total accumulated visits in z band
Total accumulated visits in y band
Map of depth (inverse variance of noise) for ideal coadd of visits accumulated so far¶
The following map shows accumulated inverse variance of completed visits, a uniformly increasing measure of progress toward a target limiting coadd limiting magnitude. The inverse variance of the noise is increases linearly with the number of exposures for exposures of uniform depth, and total exposure time when noise is dominated by sky brightness, and so is sometimes scaled to a time under reference conditions and called the "effective exposure time." See DMTN-296: Calculations of Image and Catalog Depth for more details.
Accumulated inverse noise variance (teff) in u band
Accumulated inverse noise variance (teff) in g band
Accumulated inverse noise variance (teff) in r band
Accumulated inverse noise variance (teff) in i band
Accumulated inverse noise variance (teff) in z band
Accumulated inverse noise variance (teff) in y band
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.