|
| EDG Data Set Name |
Granule Shortname |
| MODIS/Terra Land Surface Temperature/Emissivity Daily L3 Global 1km SIN Grid |
MOD11A1 |
| 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 MOD11A1 image shown was retrieved from MODIS data of April 9,
2000 over the Eastern Coast of the United States. It is an example of the MODIS Level 3 LST daily product at 1 km
resolution. MOD11A1 is a geographically gridded version of the Level 2 daily LST product.
It is generated by projecting MOD11_L2 pixels to Earth locations on a
sinusoidal mapping grid.
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 |
| Day clear-sky coverage |
na |
16-bit unsigned integer |
0 |
0 - 65535 |
0.0005 |
na |
| Night clear-sky coverage |
na |
16-bit unsigned integer |
0 |
0 - 65535 |
0.0005 |
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, 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 |
Print or save this information in .pdf format
View .pdf version 
 Retrieve the MOD11A1v4 MODIS product through the LP DAAC Data Pool
Via Search Tool: http://e0dps01u.ecs.nasa.gov:22000/OPS/drill?attrib=esdt&esdt;=MOD11A1.4&group;=MOLT
Via FTP Directory: ftp://e0dps01u.ecs.nasa.gov/MOLT/MOD11A1.004/
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 Daily 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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