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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.

Improvements/Changes from Previous Version

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

Version Description

This is version two of the Combined ASTER and MODIS Emissivity database over Land products.

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
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
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: 2025-11-04

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

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
camel_qflag CAMEL quality flag N/A int16 N/A N/A to 4 N/A
latitude Latitude Degree float32 N/A N/A to 90 N/A
longitude Longitude Degree float32 N/A N/A to 180 N/A
pc_coefs PCA coefficients N/A float32 -999 -999 to 10 N/A
pc_labvs Version number of the PC scores data file N/A int16 N/A N/A to 12 N/A
pc_npcs Number of PCs used N/A int16 N/A N/A to 9 N/A
snow_fraction Snow fraction derived from MOD10 N/A int16 N/A N/A to 100 0.01
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