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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) dataset provides monthly coefficients at 0.05 degree (~5 kilometer) resolution (CAM5K30CF). The CAMEL Principal Components Analysis (PCA) input coefficients utilized in the CAMEL high spectral resolution (HSR) algorithm are provided in the CAM5K30CF data product and are congruent to the temporally equivalent CAM5K30EM emissivity data product. Additional details regarding the methodology are available in the User Guide and Algorithm Theoretical Basis Document (ATBD).

Provided in the CAM5K30CF product are layers for PCA coefficients, number of PCA coefficients, laboratory version, snow fraction derived from MODIS Snow Cover data (MOD10), latitude, longitude, and the CAMEL quality information. PCA coefficients are dependent on the version of lab PC data and number of PCs used.

Version Description

CAMEL Version 2 data products utilize MODIS Land Surface Temperature/Emissivity Version 6.1 (MYD/MOD11) data inputs along with improved characterization of snowy scenes.

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
Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2000-04-01 to 2017-01-01
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
C2763266335-LPCLOUD
Data State
COMPLETE
Number of Files/Granules
194
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

Hook, S. (2017). Combined ASTER and MODIS Emissivity database over Land (CAMEL) Coefficient Monthly Global 0.05Deg V002 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MEASURES/LSTE/CAM5K30CF.002 Date Accessed: 2026-02-11

File Naming Convention

CAM5K30CF_coef_201612_V002.nc

The file name begins with the Product Short Name (CAM5K30CF) followed by Product File Identifier (coef), the Year and Month designated as YYYYMM (201612), Data Collection Version (V002), and the Data Format (nc).

Documents

Publications Citing This Dataset

Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
camel_qflag CAMEL quality flag N/A int16 N/A 0 to 4 N/A
latitude Latitude Degree float32 N/A -90 to 90 N/A
longitude Longitude Degree float32 N/A -180 to 180 N/A
pc_coefs PCA coefficients N/A float32 -999 -10 to 10 N/A
pc_labvs Version number of the PC scores data file N/A int16 N/A 8 to 12 N/A
pc_npcs Number of PCs used N/A int16 N/A 2 to 9 N/A
snow_fraction Snow fraction derived from MOD10 N/A int16 N/A 0 to 100 0.01
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