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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 coefficient climatology product (CAM5K30CFCLIM). The product is provided at 0.05 degree (~5 kilometer) resolution. The CAMEL Principal Components Analysis (PCA) input coefficients utilized in the CAMEL high spectral resolution (HSR) algorithm are provided in the CAM5K30CFCLIM data product. This HSR algorithm is accessible in both MATLAB and FORTRAN programming languages, and it corresponds with the temporally equivalent CAM5K30EMCLIM emissivity data product. The HSR emissivity spectra for the same month each year and each unique combination of lab dataset version and number of Principal Components (PC)s are first computed independently and then combined via a weighted average. The weighted average over 2003 through 2021 (19 years) defines the weights by the number of samples from each unique combination. Additional details regarding the methodology are available in the User Guide and Algorithm Theoretical Basis Document (ATBD).

Provided in the CAM5K30CFCLIM product are variables for PCA coefficients, the weights and sample numbers of the climatology coefficients used in the average calculation, sets of the number of PCA coefficients, laboratory version numbers, latitude, longitude, and land flag information. PCA coefficients depend on the lab PC data version and the number of PCs used.

Version Description

Monthly climatology data products were introduced in CAMEL Version 3.

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
2003-01-01 to 2021-12-31
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
C3274449168-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) Coefficient Climatology Monthly Global 0.05Deg V003 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MEASURES/LSTE/CAM5K30CFCLIM.003 Date Accessed: 2026-03-02

File Naming Convention

CAM5K30CFCLIM_coef_climatology_11Month_V003.nc

The file name begins with the Product Short Name (CAM5K30CFCLIM) followed by the Climatology Package Component (coef_climatology), the Month designated as mmMonth (11Month), the Data Collection Version (V003), 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
labvs_of_coef_set Lab Version Number of Coef Set N/A uint8 N/A 8 to 12 N/A
landflag Land Flag N/A uint8 N/A 0 to 1 N/A
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
npcs_of_coef_set Number of PC Coefs in Coef Set N/A uint8 N/A 2 to 9 N/A
pc_coefs CAMEL PCA Coefficients Climatology N/A float32 99 -10 to 10 N/A
pc_coef_nsamps Number of samples used to calculate climatology N/A uint8 N/A 1 to 19 N/A
pc_coef_weights Weights of Climatological Coefficients N/A float32 N/A 0 to 1 N/A
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