MODIS LST

MOD11A1 - MODIS Land Surface Temperature Product

6/16/2009 - Peter and Karl meet re acquiring and projecting Sierra Nevada Data

Version 5 data seems to be complete (ie 2000 to 2009) on LPDAAC datapools (an ftp)

Data Size is 3 to 6 MB per granule. For Sierra, 3 granules, 9 years, 365 days = 30 to 60 GB

Prior projection took 30 seconds. Assume swamped system takes 2 minutes per hdf file. 2 min, 9 years, 365 days

Projected data is similar in size so total disk space = 60 and 120 GB

Steps are 1) Catalog 2) Acquire 3) Project

Current problem with search for projection - Peter is debugging.

NASA data products homepage for LST [1] DAAC description [2]

Science Data Sets (HDF Layers)	UNITS	BIT TYPE	FILL	VALID RANGE	MULTIPLY BY SCALE FACTOR
LST_Day_1km: Daily daytime 1km grid land surface temperature	Kelvin	16-bit unsigned integer	0	7500–65535	0.02
QC_Day: Quality control for daytime LST and emissivity	Bit Field	8-bit unsigned integer	See QA NOTE	0–255	na
Day_view_time: Time of daytime land surface temperature observation	Hours	8-bit unsigned integer	255	0–240	0.1
Day_view_angle: View zenith angle of daytime land surface temperature	Degree	8-bit unsigned integer	255	0–130	1 (- 65)
LST_Night_1km: Daily nighttime 1km grid land surface temperature	Kelvin	16-bit unsigned integer	0	7500–65535	0.02
QC_Night: Quality control for nighttime LST and emissivity	Bit Field	8-bit unsigned integer	See QA NOTE	0–255	na
Night_view_time: Time of nighttime land surface temperature observation	Hours	8-bit unsigned integer	255	0–240	0.1
Night_view_angle: View zenith angle of nighttime land surface temperature	Degree	8-bit unsigned integer	255	0–130	1 (-65)
Emis_31: Band 31 Emissivity	none	8-bit unsigned integer	0	1–255	0.0020 (+ 0.49)
Emis_32: Band 32 Emissivity	none	8-bit unsigned integer	0	1–255	0.0020 (+ 0.49)
Clear_day_cov: day clear sky coverage	None	16-bit unsigned integer	0	1–65535	0.00004
Clear_night_cov: night clear sky coverage	None	16-bit unsigned integer	0	1–65535	0.00004