|
| EDG Data Set Name |
Granule Shortname |
| MODIS/Terra Land Surface Temperature/Emissivity Daily 5-Min L2 Swath 1km |
MOD11_L2 |
| Version |
Acquisition Range |
Science Quality Status |
| V001 |
June 25, 2000 (2000177) - May 26, 2001 (2001146) |
Beta as of Jun 25, 2000 |
| V003 |
March 21, 2000 (2000081) - December 31, 2002 (2002365) |
Provisional as of Nov 1, 2000 |
| V004 |
February 24, 2000 (2000055) |
Provisional Feb 24 2000-May 31 2000
Validated (Stage 1) Jun 1 2000-Feb 2 2003 |
Data Set Characteristics
Area = ~2330 x 2000 km
Image Dimensions = 2 (~2030x1354 row/column)
Average File Size = 26 MB
Resolution = 1 kilometer at nadir
Projection = None (swath data)
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) = 9
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 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-color MOD11_L2 image shown was retrieved from MODIS data of April 3, 2000
over the Southwest United States and Baja California. It represents the MODIS Level 2 LST product at 1km spatial
resolution, as derived from the generalized split-window LST algorithm. In
addition to temperature, emissivity, quality, view angle and view time
information, geolocation data (latitude and longitude) at 5 km resolution are
stored in this 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 |
| Land-surface Temperature |
Kelvin |
16-bit unsigned integer |
0 |
7500 - 65535 |
0.0200 |
na |
| *Quality control for daytime LST and emissivity |
na |
16-bit unsigned integer |
0 |
0 - 255 |
na |
na |
| Land-surface Temperature Error |
Kelvin |
8-bit unsigned integer |
0 |
1 - 255 |
0.0400 |
na |
| 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 |
| Zenith angle of MODIS viewing at the pixel |
Degree |
8-bit unsigned integer |
0 |
0 - 180 |
0.5000 |
na |
| Time of Land-surface Temperature observation |
Hrs |
8-bit unsigned integer |
0 |
0 - 240 |
0.1000 |
na |
| Latitude of every 5 scan lines and 5 pixels |
Degree |
32-bit floating point |
-999.9 |
-90.0 - 90.0 |
na |
na |
| Longitude of every 5 scan lines and 5 pixels |
Degree |
32-bit floating point |
-999.9 |
-180 - 180 |
na |
na |
*Quality Control Bit Index
| bit |
Long Name |
Key |
| 00-01 |
Mandatory QA flags |
00=Pixelproduced, good quality, not necessary to examine more detailed QA
01=Pixel produced, unreliable or unquantifiable 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 pixel, poor input data) |
| 02-03 |
Data quality flag |
00=good
01=missing pixel
10=fairly calibrated
11=poorly calibrated, LST processing skipped |
| 04-05 |
Cloud flag |
00=cloud free pixel
01=pixel only with thin cirrus
10=fraction of sub-pixel clouds<= 2/16
11=LST affected by nearby clouds |
| 06-07 |
LST model number |
00=generalized split-window method
01=day/night method
10=high LST w/o atmospheric & emis corrections
11=cirrus effects corrected |
| 08-09 |
LST quality flag |
00=no multi-method comparison
01=multi-method comparison done
10=fair consistency
11=good consistency |
| 10-11 |
Emissivity flag |
00=inferred from land cover type
01=MODIS retrieved
10=TBD
11=default value used |
| 12-13 |
Emis quality flag |
00=emis quality not checked
01=emis quality checked with
land cover type
10=emis quality checked with NDVI
11=emis view-angle dependence checked |
| 14-15 |
Emis error flag |
00=error in emis_31 emis_32 <= 0.01
01=error in emis_31 emis_32 <= 0.02
10=error in emis_31 emis_32 <= 0.04
11=error in emis_31 emis_32 > 0.04 |
Order Data through the EOS Data Gateway
(http://edcimswww.cr.usgs.gov/pub/imswelcome/)
EOS Data Gateway Search Tips
| Data Center: |
EDC-ECS |
| Sensor: |
MODIS |
| Dataset: |
MODIS/Terra Land Surface Temperature/Emissivity Daily 5-Min L2 Swath 1km |
| Spatial: |
HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER Max/Min |
| Geographic Extent: |
Type Lat/Long Range or Draw on Map |
| Temporal Extent: |
2000-02-24 to present |
Retrieve Data through the LP DAAC Data Pool
(http://edcdaac.usgs.gov/tutorial/datapool.html)
Product Information
Contact Information
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