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This false-color MOD11A2 image shows the 8-day average values of daytime clear-sky LSTs retrieved from MODIS data in the period of April 30-May 7, 2000 over the eastern coast of the United States.
The level-3 MODIS global Land Surface Temperature (LST) and Emissivity 8-day data are composed from the daily 1-kilometer LST product (MOD11A1) and stored on a 1-kilometer Sinusoidal grid as the average values of clear-sky LSTs during an 8-day period.
MOD11A2 is comprised of daytime and nighttime LSTs, quality assessment, observation times, view angles, bits of clear-sky days and nights, and emissivities estimated in Bands 31 and 32 from land cover types.
Version-5 MODIS/Terra Land Surface Temperature/Emissivity products are validated to Stage 2, which means that their accuracy has been assessed over a widely distributed set of locations and time periods via several ground-truth and validation efforts. Further details regarding MODIS land product validation for the LST/E products are available from the following URL: http://landval.gsfc.nasa.gov/ProductStatus.php?ProductID=MOD11
Collection 5 Changes in the V5 PGE16 (PDF)
See Product Description
Science Data Sets for MODIS/Terra Land Surface Temperature/Emissivity 8-Day L3 Global 1km SIN Grid V005 (MOD11A2):
Science Data Sets (HDF Layers) (12)
MULTIPLY BY SCALE FACTOR
|LST_Day_1km: 8-Day 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: Average time of daytime land surface temperature observation||Hours||8-bit unsigned integer||255||0–240||0.1|
|Day_view_angle: Average view zenith angle of daytime land surface temperature||Degree||8-bit unsigned integer||255||0–130||1 (-65)|
|LST_Night_1km: 8-Day 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: Average time of nighttime land surface temperature observation||Hours||8-bit unsigned integer||255||0 – 240||0.1|
|Night_view_angle: Average 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_sky_days: the days in clear sky conditions and with valid LSTs||None||8-bit unsigned integer||0||1–255||na|
|Clear_sky_nights: the nights in clear sky conditions and with valid LSTs||None||8-bit unsigned integer||0||1–255||na|
The table below lists the bit field legend for the LST Quality Indicators.
The QC science data sets in this product (QC_Day, QC_Night) provide the user with information on algorithm results that can be viewed in a spatial context for each pixel. The QC information tells if algorithm results were nominal, abnormal, or if other defined conditions were encountered for a pixel. The QC information should be used to help determine the usefulness of the LST data for a user's needs. The QC information can be extracted by reading the flags stored in an 8-bit unsigned integer. See Table 1 (QC_Day, QC_Night) below.
NOTE: there is no FillValue for the QC SDS. This SDS should be used together with the LST SDS. If LST has FillValue 0, the 0-1 bits in QC have values of 10 or 11, other bit fields with 0 as undefined.
V005 MOD11A2 QC_DAY, QC_NIGHT
|0–1||Mandatory QA Flags||00||LST produced, good quality, not necessary to examine more detailed QA|
|01||LST produced, other quality, recommend examination of more detailed QA|
|10||LST not produced due to cloud effects|
|11||LST not produced primarily due to reasons other than cloud|
|2–3||Data Quality Flag||00||good data quality of L1B in 7 TIR bands|
|01||Other quality data|
|4–5||Emis Error Flag||00||Average emissivity error <= 0.01|
|01||Average emissivity error <= 0.02|
|10||Average emissivity error <= 0.04|
|11||Average emissivity error > 0.04|
|6–7||LST Error Flag||00||Average LST error <= 1K|
|01||Average LST error <= 2K|
|10||Average LST error <= 3K|
|11||Average LST error > 3K|
The table below lists the bit field legend for the LST Clear-Sky definitions.
V005 MOD11A2 Clear_Sky_Day/Clear_Sky_Nights
|0||Day/Night 1 Clear Sky Flag||00||Day/Night 1 is not clear-sky|
|01||Day/Night 1 is clear-sky|
|1||Day/Night 2 Clear Sky Flag||00||Day/Night 2 is not clear-sky|
|01||Day/Night 2 is clear-sky|
|2||Day/Night 3 Clear Sky Flag||00||Day/Night 3 is not clear-sky|
|01||Day/Night 3 is clear-sky|
|3||Day/Night 4 Clear Sky Flag||00||Day/Night 4 is not clear-sky|
|01||Day/Night 4 is clear-sky|
|4||Day/Night 5 Clear Sky Flag||00||Day/Night 5 is not clear-sky|
|01||Day /Night 5 is clear-sky|
|5||Day/Night 6 Clear Sky Flag||00||Day/Night 6 is not clear-sky|
|01||Day/Night 6 is clear-sky|
|6||Day/Night 7 Clear Sky Flag||00||Day/Night 7 is not clear-sky|
|01||Day/Night 7 is clear-sky|
|7||Day 8/Night Clear Sky Flag||00||Day/Night 8 is not clear-sky|
|01||Day/Night 8 is clear-sky|
|Temporal Coverage||March 5, 2000 -|
|Area||~1100 x 1100 km|
|File Size||~5 MB compressed|
|Dimensions||1200 x 1200 rows/columns|
|Resolution||1 kilometer (0.93-km)|
|Science Data Sets (SDS HDF Layers)||12|
Please find the current MODIS-related Data policies on the MODIS Policies page at https://lpdaac.usgs.gov/products/modis_policies.
For information on how to cite LP DAAC data, please see our Data Citations page at https://lpdaac.usgs.gov/about/citing_lp_daac_and_data.
Data Pool: The Data Pool (On-line Archive) provides access to all MODIS products, and a rolling archive of ASTER level-1B products that cover the U.S. and its Territories.
Reverb: This tool provides access to a complete data record of all MODIS and ASTER products available from the LP DAAC.
GloVis: The Global Visualization interface provides access to tiled MODIS products that have an associated browse image, and all ASTER level-1B products.
MRTWeb: The MODIS Reprojection Tool Web interface provides access to all MRT services offered by the stand-alone MRT.
The Data Access section of this Web site also provides access to these interfaces.
LP DAAC User Services
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