|
| EDG Data Set Name |
Granule Shortname |
| MODIS/Aqua Land Surface Temperature/Emissivity Daily L3 Global 5km SIN Grid |
MYD11B1 |
| Version |
Acquisition Range |
Science Quality Status |
| V003 |
March 6 2003 (2003065) |
Provisional |
Data Set Characteristics
Area = ~1100 x 1100 km
Image Dimensions = 2 (240x240 row/column)
Average File Size = 1.9 MB
Resolution = 5 kilometer (actual 4.63km)
Projection = Sinusoidal
LST Data Type = 16-bit Unsigned Integer
Emissivity Data Type = 8-bit Unsigned Integer
Data Format = HDF-EOS
Science Data Sets (SDS) = 17
Product Description
This MODIS Land Surface Temperature and Emissivity (LST/E) product provides per-grid temperature and emissivity values. Temperatures are extracted in Kelvin with a day/night LST algorithm applied to a pair of MODIS daytime and nighttime observations. This method retrieves the land-surface temperature and emissivities in bands 20, 22, 23, 29, and 31-32, simultaneously. This algorithm uses MODIS data as input, including geolocation, radiance, cloud masking, atmospheric temperature and water vapor. The temperature/emissivity 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 image shown was retrieved from MODIS data of March 7, 2003. Saudia Arabia is to the East, and Egypt, Sudan, and Ethiopia line the western border of the Red Sea. The image is an example of the MODIS Level 3 LST daily product at 5 km resolution.
NOTE: These products are provisional, meaning that product quality may not be optimal. Incremental product improvements are still occurring, and users are urged to contact MODIS Science Team representatives prior to use of the data in publications. These data are likely to be replaced when the validated product becomes available.
| SDS |
Units |
Data Type-bit |
Fill Value |
Valid Range |
Multiply by
Scale Factor |
Add
ADDITIONAL
OFFSET |
| Daily daytime 5km 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 - 120 |
0.2000 |
na |
| View zenith angle of daytime Land-surface Temperature |
Degree |
8-bit unsigned integer |
255 |
0 - 130 |
1.0000 |
-65.0000 |
| Daily nighttime 5km 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 |
0 - 120 |
0.2000 |
na |
| View zenith angle of nighttime Land-surface Temperature |
Degree |
8-bit unsigned integer |
255 |
0 - 130 |
1.0000 |
-65.0000 |
| Band 20 emissivity |
na |
8-bit unsigned integer |
0 |
1 - 255 |
0.0020 |
0.4900 |
| Band 22 emissivity |
na |
8-bit unsigned integer |
0 |
1 - 255 |
0.0020 |
0.4900 |
| Band 23 emissivity |
na |
8-bit unsigned integer |
0 |
1 - 255 |
0.0020 |
0.4900 |
| Band 29 emissivity |
na |
8-bit unsigned integer |
0 |
1 - 255 |
0.0020 |
0.4900 |
| 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 |
| Daily daytime 5km grid LST aggregated from 1km |
Kelvin |
16-bit unsigned integer |
0 |
7500 - 65535 |
0.0200 |
na |
| Daily nighttime 5km grid LST aggregated from 1km |
Kelvin |
16-bit unsigned integer |
0 |
7500 - 65535 |
0.0200 |
na |
| +Quality control for retrieved emissivities |
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=LST affected by nearby clouds and/or sub-grid cloud and/or ocean
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 |
+ Quality Control Bit Index for Retrieved Emissivities
| bit |
Long Name |
Key (as 4-bit unsigned integer value) |
| 00-03 |
Nighttime view angle flag |
0 – 15 = index of the nighttime view angle sub-range |
| 04-07 |
Daytime view angle flag |
0 – 15 = index of the daytime view angle sub-range |
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EOS Data Gateway Search Tips
| Data Center: |
LPDAAC |
| Sensor: |
MODIS |
| Dataset: |
MODIS/Aqua Land Surface Temperature/Emissivity Daily L3 Global 5km SIN Grid |
| Spatial: |
HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER Max/Min |
| Geographic Extent: |
Type Lat/Long Range or Draw on Map |
| Temporal Extent: |
2003-03-06 to present |
Product Information
Contact Information
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