Description
The MOD11_L2 Version 6 data product was decommissioned on July 31, 2023. Users are encouraged to use the MOD11_L2 Version 6.1 data product.
The MOD11_L2 Version 6 swath product provides per-pixel Land Surface Temperature and Emissivity (LST&E) with a pixel size of 1,000 meters (m). The product is produced daily in 5-minute temporal increments of satellite acquisition using the generalized split-window algorithm. MOD11_L2 is a Level 2 product which provides the input for the Level 3 products. Provided in each MOD11_L2 file are LST, quality control assessment, error estimates, bands 31 and 32 emissivities, zenith angle of the pixel view, observation time, and the geographic coordinates for every five scan lines and samples.
Known Issues
- Production of V6 Terra MODIS Land Surface Temperature and Emissivity (LST&E) data products was discontinued on November 16, 2022, due to significant loss of data retrieval following the Constellation Exit Maneuvers.
- For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.
Improvements/Changes from Previous Versions
- Removed cloud-contaminated LSTs from Level 2 and Level 3 LST products.
- Updated the coefficient look-up table (LUT) for the split-window algorithm with comprehensive regression analysis of Moderate Resolution Imaging Spectroradiometer (MODIS) simulation data in bands 31 and 32 over wide ranges of surface and atmospheric conditions, especially extending the upper boundary for (LST – Ts-air) in arid and semi-arid regions. Increased the overlap between various sub-ranges to reduce the sensitivity of the algorithm to uncertainties in the input data (i.e., column water vapor and air surface temperature from MOD07).
- Made minor adjustments in the classification-based surface emissivity values, especially for bare soil and rocks land cover types.
- Tuned the day/night algorithm by adjusting weights to improve performance in desert regions where the incorporated split-window algorithm may not work well.
- Generated new gridded LST&E products with a 6 km spatial resolution for 8-day (MOD11B2) and monthly (MOD11B3) intervals in response to user community requests.
Version Description
Product Summary
Citation
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File Naming Convention
The file name begins with the Product Short Name (MOD11) followed by the Julian Date of Acquisition formatted as AYYYYDDD (A2002281), the Hours and Minutes of Acquisition provided as HHMM (2350), the Version of the data collection (006), the Julian Date and Time of Production designated as YYYYDDDHHMMSS (2015160225759), and the Data Format (hdf).
Documents
USER'S GUIDE
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)
PRODUCT QUALITY ASSESSMENT
Dataset Resources
Publications Citing This Dataset
Variables
Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.
The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.
| Name Sort descending | Description | Units | Data Type | Fill Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|
| Emis_31 | Band 31 Emissivity | N/A | uint8 | 0 | 0 to 255 | 0.002 |
| Emis_32 | Band 32 Emissivity | N/A | uint8 | 0 | 0 to 255 | 0.002 |
| Error_LST | Land Surface Temperature Error | Kelvin | uint8 | 0 | 0 to 255 | 0.04 |
| Latitude | Latitude of every 5 scan lines and 5 pixels | Degree | float32 | -999 | -999 to 90 | N/A |
| Longitude | Longitude of every 5 scan lines and 5 pixels | Degree | float32 | -999 | -999 to 180 | N/A |
| LST | Land Surface Temperature | Kelvin | uint16 | 0 | 0 to 65535 | 0.02 |
| QC | Quality control for daytime LST and emissivity | Bit Field | uint16 | N/A | N/A to 65535 | N/A |
| View_angle | Zenith angle of MODIS viewing at the pixel | Degree | uint8 | 255 | 255 to 180 | 0.5 |
| View_time | Local time of pixel observation | Hours | uint8 | 255 | 255 to 240 | 0.1 |