Skip to main content

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 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.

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
C2763266343-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) Uncertainty Monthly Global 0.05Deg V002 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MEASURES/LSTE/CAM5K30UC.002 Date Accessed: 2025-11-04

File Naming Convention

CAM5K30UC_emis_uncertainty_201612_V002.nc

The file name begins with the Product Short Name (CAM5K30UCCLIM) followed by 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 9999 to 1000 0.001
camel_qflag CAMEL quality flag N/A uint8 99 99 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
spatial_uncertainty Spatial uncertainty of the CAMEL Emissivity database N/A uint16 9999 9999 to 1000 0.001
temporal_uncertainty Temporal uncertainty of the CAMEL Emissivity database N/A uint16 9999 9999 to 1000 0.001
total_uncertainty Total uncertainty of the CAMEL Emissivity database N/A uint16 9999 9999 to 1000 0.001
total_uncertainty_quality_flag Quality flag of CAMEL uncertainties N/A uint8 99 99 to 2 N/A
wavelength Spectral wavelength Microns float32 N/A N/A to 14.3 N/A
You're viewing 9 of 9