=============== obslistYYYYMMDD =============== :Summary: List of tiles observed, along with tile info and observing conditions. :Naming Convention: ``obslistYYYYMMDD.fits``, where YYYYMMDD is the date of the start of the night of observations. :Regex: ``obslist20([0-9]{2})(0[1-9]|1[0-2])(0[1-9]|1[0-9]|2[0-9]|3[0-1])\.fits`` :File Type: FITS, 10-15 KB. Contents ======== ====== ======= ======== =================== Number EXTNAME Type Contents ====== ======= ======== =================== HDU0_ IMAGE N/A HDU1_ BINTABLE Observed tiles ====== ======= ======== =================== FITS Header Units ================= HDU0 ---- N/A. This HDU has no non-standard required keywords. Empty HDU. HDU1 ---- Table of observed tiles. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ ====== ============= ==== ===================== KEY Example Value Type Comment ====== ============= ==== ===================== NAXIS1 152 int length of dimension 1 NAXIS2 30 int length of dimension 2 ====== ============= ==== ===================== Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ ======== ======== ===== =========== Name Type Units Description ======== ======== ===== =========== TILEID int32 DESI tile ID RA float64 deg right ascension DEC float64 deg declination PROGRAM char[8] 'DARK', 'BRIGHT' or 'GRAY' EBMV float64 Extinction MAXLEN float64 sec Maximum exposure length MOONFRAC float64 Fraction of the Moon's illuminated surface MOONDIST float64 deg Distance between the Moon and the tile centre. MOONALT float64 deg Elevation of the Moon SEEING float64 " Seeing LINTRANS float64 Linear transparency AIRMASS float64 Airmass DESSN2 float64 Design (S/N)^2 STATUS int32 1 or 2 if partially or fully observed EXPTIME float64 sec Exposure time OBSSN2 float64 Achieved (S/N)^2 DATE-OBS char[24] Date and time of observation MJD float64 days Modified Julian Date of observation ======== ======== ===== =========== Notes and Examples ================== The status can also be 0, but tiles with status==0 should not be in this table.