Combined ASTER and MODIS Emissivity database over Land (CAMEL) Total Uncertainty data at 8.6 micrometer from the CAM5K30UC product over the globe from the month of January 2021.
View full-size imageThe NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Combined Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Moderate Resolution Imaging Spectroradiometer (MODIS) Emissivity for Land (CAMEL) dataset provides monthly emissivity uncertainty at 0.05 degree (~5 kilometer) resolution (CAM5K30UC). CAM5K30UC is an estimation of total emissivity uncertainty comprising three independent components of variability: temporal, spatial, and algorithm. Each measure of uncertainty is provided for all 13 hinge points of emissivity and each latitude-longitude point. Additional details regarding the methodology are available in the User Guide and Algorithm Theoretical Basis Document (ATBD). Corresponding emissivity values can be found in the CAM5K30EM data product.
Provided in the CAM5K30UC product are layers for algorithm uncertainty, spatial uncertainty, temporal uncertainty, total uncertainty, latitude, longitude, spectral wavelength, CAMEL quality, and total uncertainty quality information.
Version 3 includes new MODIS Terra and Aqua Land Surface Temperature and 3-Band Emissivity (MYD/MOD21) input data in the University of Wisconsin-Madison MODIS Baseline Fit (UWBF) emissivity database and the latest 6.1 version of MODIS Terra and Aqua Land Surface Temperature and Emissivity (MYD/MOD11) and MYD/MOD21 products with the most up-to-date calibration corrections. Additional information on the Version 3 updates is provided in Section 2 of the User Guide and ATBD.
| Characteristic | Description |
|---|---|
| Collection | MEaSUREs LSTE |
| DOI | 10.5067/MEaSUREs/LSTE/CAM5K30UC.003 |
| File Size | ~140 MB |
| Temporal Resolution | Monthly |
| Temporal Extent | 2000-03-01 to 2022-01-01 |
| Spatial Extent | Global |
| Coordinate System | Geographic Latitude and Longitude |
| Datum | World Geodetic System (WGS84) |
| File Format | netCDF-4 |
| Geographic Dimensions | 90° x 180° |
| Characteristic | Description |
|---|---|
| Number of Science Dataset (SDS) Layers | 9 |
| Columns/Rows | 3600 x 7200 |
| Pixel Size | 5600 m |
| SDS Name | Description | Units | Data Type | Fill Value | No Data Value | Valid Range | Scale Factor |
|---|---|---|---|---|---|---|---|
| spatial_uncertainty | Spatial uncertainty of the CAMEL Emissivity database | N/A | 16-bit unsigned integer | 9999 | N/A | 0 to 1000 | 0.001 |
| temporal_uncertainty | Temporal uncertainty of the CAMEL Emissivity database | N/A | 16-bit unsigned integer | 9999 | N/A | 0 to 1000 | 0.001 |
| algorithm_uncertainty | Algorithm uncertainty of the CAMEL Emissivity database | N/A | 16-bit unsigned integer | 9999 | N/A | 0 to 1000 | 0.001 |
| total_uncertainty | Total uncertainty of the CAMEL Emissivity database | N/A | 16-bit unsigned integer | 9999 | N/A | 0 to 1000 | 0.001 |
| latitude | Latitude | Degree | 32-bit floating point | N/A | N/A | -90 to 90 | N/A |
| longitude | Longitude | Degree | 32-bit floating point | N/A | N/A | -180 to 180 | N/A |
| wavelength | Spectral wavelength | Microns | 32-bit floating point | N/A | N/A | 3.6 to 14.3 | N/A |
| camel_qflag | CAMEL quality flag | N/A | 8-bit unsigned integer | 99 | N/A | 0 to 4 | N/A |
| total_uncertainty_quality_flag | Quality flag of CAMEL uncertainties | N/A | 8-bit unsigned integer | 99 | N/A | 0 to 2 | N/A |
| Value | Description |
|---|---|
| 0 | Sea or inland water |
| 1 | Good quality of UWBF and ASTER GED data |
| 2 | Good quality of UWBF and filled ASTER GED data |
| 3 | Good quality of ASTER GED and filled UWBF data |
| 4 | Filled values used for both UWBF and ASTER GED data |
| Value | Description |
|---|---|
| 0 | Sea, no CAMEL data |
| 1 | Good quality data |
| 2 | Unphysical uncertainty |
Additional quality flag information is provided in Sections 2 and 5 of the User Guide and ATBD.
The following granules are missing from the product: January, February, and August of 2000; June and July of 2001; March of 2002; December of 2003; July of 2010; and February of 2016.