CAM5K30UC v002

Combined ASTER and MODIS Emissivity for Land (CAMEL) Uncertainty Monthly Global 0.05 Deg


PI: Simon Hook

Description

The NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Combined ASTER and 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 3 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.

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Characteristics

Improvements/Changes from Previous Versions

  • Version 2 includes two additional laboratory datasets to more accurately characterize snowy scenes.

Collection and Granule

Collection

Characteristic Description
CollectionMEaSUREs LSTE
DOI10.5067/MEaSUREs/LSTE/CAM5K30UC.002
File Size~140 MB
Temporal ResolutionMonthly
Temporal Extent2000-04-01 to 2016-12-31
Spatial ExtentGlobal
Coordinate SystemGeographic Latitude and Longitude
DatumWorld Geodetic System (WGS84)
File FormatNetCDF4
Geographic Dimensions90° x 180°

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers9
Columns/Rows3600 x 7200
Pixel Size5600 m

Layers

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

CAMEL Quality Flag Values

Value Description
0 Sea or inland water
1 Good quality of Baseline Fit and ASTER GED data
2 Good quality of Baseline Fit and filled ASTER GED data
3 Good quality of ASTER GED and filled Baseline Fit data
4 Filled values used for both Baseline Fit and ASTER GED data

Total Uncertainty Quality Flag Values

Value Description
0 Sea, no CAMEL data
1 Good quality data
2 Unphysical uncertainty

Product Quality

Additional quality flag information is provided in the User Guide and ATBD.

Known Issues

No known issues.

Documentation

Using the Data

Access Data

Citation

DOI: 10.5067/MEaSUREs/LSTE/CAM5K30UC.002

About the Image

Combined ASTER and MODIS Emissivity for Land (CAMEL) uncertainty data from the CAM5K30UC product over the globe from the month of January 2012.

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