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Description

The 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) data suite has been expanded to include a monthly global uncertainty climatology product (CAM5K30UCCLIM). The product is provided at 0.05 degree (~5 kilometer) resolution. The 13 hinge-point uncertainty climatology is computed by taking an average over each available month from 2003 through 2021 (19 years) and includes three independent components of variability: temporal, spatial, and algorithm. Each measure of uncertainty climatology 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 CAM5K30EMCLIM data product.

Provided in the CAM5K30UCCLIM product are variables for algorithm uncertainty, spatial uncertainty, temporal uncertainty, total uncertainty, latitude, longitude, spectral wavelength, and total uncertainty quality flag information.

Product Summary

Platforms
Terra ,
Aqua
Instruments
ASTER ,
MODIS
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
5600 Meters x 5600 Meters
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2003-01-01 to 2022-01-01
Temporal Resolution
1 Month
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC) ,
Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison (UWI-MAD/SSEC/CIMSS)
Concept ID
C3274446180-LPCLOUD
Data State
COMPLETE
Number of Files/Granules
12
Processing Level
3
Published
Updated
Science Keywords
Emissivity ,
Vegetation Index ,
Snow Cover

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Borbas, E., Hook, S., Hulley, G., Loveless, M., Knuteson, R., & Cawse-Nicholson, K. (2024). Combined ASTER and MODIS Emissivity database over Land (CAMEL) Uncertainty Climatology Monthly Global 0.05Deg V003 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MEASURES/LSTE/CAM5K30UCCLIM.003 Date Accessed: 2025-12-14

File Naming Convention

CAM5K30UCCLIM_emis_uncertainty_climatology_07Month_V003.nc

The file name begins with the Product Short Name (CAM5K30EMCLIM) followed by the Climatology Package Component (emis_uncertainty_climatology), the Month designated as mmMonth (07Month), the Data Collection Version (V003), and the Data Format (nc).

Documents

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 Description Units Data Type Fill Value Valid Range Scale Factor
algorithm_uncertainty Algorithm uncertainty of the CAMEL Emissivity database N/A uint16 9999 0 to 1000 0.001
latitude Latitude, degrees North at grid-box center Degree float32 N/A -90 to 90 N/A
longitude Longitude, degrees East at grid-box center Degree float32 N/A -180 to 180 N/A
spatial_uncertainty Spatial uncertainty of the CAMEL Emissivity database N/A uint16 9999 0 to 1000 0.001
temporal_uncertainty Temporal uncertainty of the CAMEL Emissivity database N/A uint16 9999 0 to 1000 0.001
total_uncertainty Total uncertainty of the CAMEL Emissivity database N/A uint16 9999 0 to 1000 0.001
total_uncertainty_quality_flag Quality flag of the CAMEL Total Uncertainty N/A uint8 99 0 to 4 N/A
wavelength Wavelength of CAMEL hinge points in μm Microns float32 N/A N/A N/A
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