EDG Data Set Name |
Granule Shortname |
MODIS/Terra Land Surface Temperature/Emissivity 8-Day L3 Global 1km SIN Grid |
MOD11A2 |
Version |
Acquisition Range |
Science Quality Status |
V003 |
August 29, 2002 (2002241) - October 7, 2002 (2002280) |
Provisional as of Nov 1, 2000 |
V004 |
February 24, 2000 (2000055) - Present |
Provisional Feb 24 2000-May 31 2000 Validated (Stage 1) Jun 1 2000-Feb 2 2003 |
Data Set Characteristics
Area = ~ 1100 x 1100 km
Image Dimensions= 2 (1200x1200 row/column)
Average File Size = 24 MB
Resolution = 1 kilometer (actual 0.93km)
Projection = Sinusoidal
Land Surface Temperature (LST) Data Type = 16-bit Unsigned Integer
Emissivity Data Type = 8-bit Unsigned Integer
Data Format = HDF-EOS
Science Data Sets (SDS) = 12
Product Description
MODIS Land Surface Temperature and Emissivity (LST/E) products provide per-pixel
temperature and emissivity values. Temperatures are extracted in Kelvin with a
view-angle dependent algorithm applied to direct observations. This method
yields 1 K accuracy for materials with known emissivities. The view angle
information is included in each LST/E product. Emissivities are estimates
derived from applying algorithm output to land cover database information. The
LST/E algorithms use MODIS data as input, including geolocation, radiance, cloud
masking, atmospheric temperature, water vapor, snow, and land cover. The
temperature products in turn are key inputs to many of the high level MODIS
products and provide data for global temperature mapping and change observation.
On land, soil and canopy temperature are among the main determinants of the rate
of growth of vegetation and they govern seasonal start and termination of
growth. Hydrologic processes such as evapotranspiration and snow and ice melt
are highly sensitive to surface temperature fluctuation, which is also an
important discriminating factor in classification of land surface types.
The false-colored
MOD11A2 image shown was retrieved from MODIS data between June 1-8, 2000 over
the Western Coast of the United States. It is an example of the MODIS Level 3 LST 8-Day product at 1 km
resolution. MOD11A2 is a composited version of the Level 3 daily LST product.
NOTE: These
products are validated, meaning that product uncertainties are well defined over
a range of representative conditions. Although there may be later improved versions, these data are ready for use in scientific publications.
SDS |
Units |
Data Type-bit |
Fill Value |
Valid Range |
Multiply by Scale Factor |
Add Additional Offset |
Daily daytime 1km grid Land-surface Temperature |
Kelvin |
16-bit unsigned integer |
0 |
7500 - 65535 |
0.0200 |
na |
*Quality control for daytime LST and emissivity |
na |
8-bit unsigned integer |
0 |
0 - 255 |
na |
na |
Time of daytime Land-surface Temperature observation |
Hrs |
8-bit unsigned integer |
0 |
0 - 240 |
0.1000 |
na |
View zenith angle of daytime Land-surface Temperature |
Degree |
8-bit unsigned integer |
255 |
0 - 130 |
1.0000 |
-65.0000 |
Daily nighttime 1km grid Land-surface Temperature |
Kelvin |
16-bit unsigned integer |
0 |
7500 - 65535 |
0.0200 |
na |
Quality control for nighttime LST and emissivity |
na |
8-bit unsigned integer |
0 |
0 - 255 |
na |
na |
Time of nighttime Land-surface Temperature observation |
Hrs |
8-bit unsigned integer |
0 |
1 - 240 |
0.1000 |
na |
View zenith angle of nighttime Land-surface Temperature |
Degree |
8-bit unsigned integer |
255 |
0 - 130 |
1.0000 |
-65.0000 |
Band 31 emissivity |
na |
8-bit unsigned integer |
0 |
1 - 255 |
0.0020 |
0.4900 |
Band 32 emissivity |
na |
8-bit unsigned integer |
0 |
1 - 255 |
0.0020 |
0.4900 |
Clear-sky Days |
na |
8-bit unsigned integer |
0 |
0 - 255 |
na |
na |
Clear-sky Nights |
na |
8-bit unsigned integer |
0 |
0 - 255 |
na |
na |
*Quality Control Bit Index:
bit |
Long Name |
Key |
00-01 |
Mandatory QA flags |
00=Pixel produced, good quality, not necessary to examine more detailed QA
01=Pixel produced, other quality, recommend examination of more detailed QA
10=Pixel not produced due to cloud effects
11=Pixel not produced primarily due to reasons other than cloud (such as ocean
grid, grid not covered by all processed granules) |
02-03 |
Data quality flag |
00=good data quality
01=other quality data
10=TBD
11=TBD |
04-05 |
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 |
06-07 |
LST Error flag |
00=average LST error <= 1K
01=average LST error <= 2K
10=average LST error <= 3K
11=average LST error > 3K |
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Retrieve the MOD11A2v4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e0dps01u.ecs.nasa.gov:22000/OPS/drill?attrib=esdt&esdt;=MOD11A2.4&group;=MOLT
Via FTP Directory: ftp://e0dps01u.ecs.nasa.gov/MOLT/MOD11A2.004/
Order Data through the EOS Data Gateway
( http://edcimswww.cr.usgs.gov/pub/imswelcome/)
EOS Data Gateway Search Tips
Data Center: |
LPDAAC |
Sensor: |
MODIS |
Dataset: |
MODIS/Terra Land Surface Temperature/Emissivity 8-Day L3 Global 1km SIN Grid |
Spatial: |
HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER Max/Min |
Geographic Extent: |
Type Lat/Long Range or Draw on Map |
Temporal Extent: |
2000-02-24 to present |
Product Information
Contact Information
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