Difference between revisions of "MODIS LST"

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m (New page: 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 on LPDAAC datapools (a...)
 
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MOD11A1 - MODIS Land Surface Temperature Product
 
MOD11A1 - MODIS Land Surface Temperature Product
  
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6/16/2009 - Peter and Karl meet re acquiring and projecting Sierra Nevada Data
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== 6/16/2009 - Peter and Karl meet re acquiring and projecting Sierra Nevada Data ==
  
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Version 5 data seems to be complete on LPDAAC datapools (and ftp)
+
*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
+
 
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Projected data is similar in size.
+
*Data Size is 3 to 6 MB per granule.  For Sierra, 3 granules, 9 years, 365 days = 30 to 60 GB
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Total Space between 60 and 120 GB
+
 
 +
*We are using 1km because this is the native resolution
 +
 
 +
*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(done!!)
  
 
NASA data products homepage for LST [http://modis.gsfc.nasa.gov/data/dataprod/dataproducts.php?MOD_NUMBER=11]
 
NASA data products homepage for LST [http://modis.gsfc.nasa.gov/data/dataprod/dataproducts.php?MOD_NUMBER=11]
 
DAAC description [https://lpdaac.usgs.gov/lpdaac/products/modis_products_table/land_surface_temperature_emissivity/daily_l3_global_1km/v5/terra]
 
DAAC description [https://lpdaac.usgs.gov/lpdaac/products/modis_products_table/land_surface_temperature_emissivity/daily_l3_global_1km/v5/terra]
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Science Data Sets (HDF Layers) !! UNITS !! BIT TYPE !! FILL !! VALID RANGE !! MULTIPLY BY SCALE FACTOR
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LST_Day_1km: || Daily daytime 1km grid land surface temperature || Kelvin || 16-bit unsigned integer  || 0  || 7500–65535  || 0.02
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{| border="1" style="text-align:center"
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QC_Day: || Quality control for daytime LST and emissivity  || Bit Field  || 8-bit unsigned integer See QA NOTE 0–255 na
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!Science Data Sets (HDF Layers) !! UNITS !! BIT TYPE !! FILL !! VALID RANGE !! MULTIPLY BY SCALE FACTOR
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Day_view_time: || Time of daytime land surface temperature observation || Hours  || 8-bit unsigned integer  || 255 ||  0–240 0.1
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|-
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Day_view_angle:  || View zenith angle of daytime land surface temperature || Degree  || 8-bit unsigned integer  || 255 || 0–130 1 (- 65)
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|LST_Day_1km: Daily daytime 1km grid land surface temperature|| Kelvin || 16-bit unsigned integer  || 0  || 7500–65535  || 0.02
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LST_Night_1km:  || Daily nighttime 1km grid land surface temperature || Kelvin  || 16-bit unsigned integer  || 0 || 7500–65535 0.02
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|-
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QC_Night: || Quality control for nighttime LST and emissivity || Bit Field  || 8-bit unsigned integer See QA NOTE || 0–255  || na
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|QC_Day: Quality control for daytime 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
+
|-
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Night_view_angle:  || View zenith angle of nighttime land surface temperature || Degree || 8-bit unsigned integer  || 255 0–130  || 1 (-65)
+
|Day_view_time: Time of daytime land surface temperature observation || Hours  || 8-bit unsigned integer  || 255 ||  0–240 || 0.1
−
Emis_31:  || Band 31 Emissivity  || none  || 8-bit unsigned integer  || 0  || 1–255  || 0.0020 (+ 0.49)
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|-
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Emis_32:  || Band 32 Emissivity || none 8-bit unsigned integer  || 0  || 1–255  || 0.0020 (+ 0.49)
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|Day_view_angle:  View zenith angle of daytime land surface temperature|| Degree  || 8-bit unsigned integer  || 255 || 0–130 || 1 (- 65)
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Clear_day_cov:  || day clear sky coverage  || None 16-bit unsigned integer 0  || 1–65535  || 0.00004
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|-
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Clear_night_cov: || night clear sky coverage  || None  || 16-bit unsigned integer  || 0  || 1–65535  || 0.00004
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|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
 +
|}

Latest revision as of 16:03, 16 June 2009

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
  • We are using 1km because this is the native resolution
  • 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(done!!)

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
Retrieved from "http://wiki-snow.eri.ucsb.edu/index.php?title=MODIS_LST&oldid=120"