- Dataset Availability
- 1981-06-24T00:00:00Z–2019-05-16T00:00:00Z
- Dataset Provider
- NOAA
- Earth Engine Snippet
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ee.ImageCollection("NOAA/CDR/AVHRR/SR/V4")
- Tags
Description
The NOAA Climate Data Record (CDR) of AVHRR Surface Reflectance contains gridded daily surface reflectance and brightness temperatures derived from the Advanced Very High Resolution Radiometer (AVHRR) sensors onboard seven NOAA polar orbiting satellites. The data are gridded at a resolution of 0.05° and computed globally over land surfaces.
Known issues with this dataset include:
TIMEOFDAY variable contains values that are too large by 1 day
Latitude values are not correctly associated with the center of the grid cell, error is < 0.002 degrees
Longitude values are not correctly associated with the center of the grid cell, error is < 0.02 degrees
Bands
Resolution
5566 meters
Bands
Name | Units | Min | Max | Scale | Wavelength | Description | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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SREFL_CH1 |
1* | 10000* | 0.0001 | 640nm | Bidirectional surface reflectance |
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SREFL_CH2 |
1* | 10000* | 0.0001 | 860nm | Bidirectional surface reflectance |
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SREFL_CH3 |
-32768* | 32767* | 0.0001 | 3.75µm | Bidirectional surface reflectance |
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BT_CH3 |
K | -32519* | 30136* | 0.1 | 3.75µm | Brightness temperature |
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BT_CH4 |
K | -32519* | 31450* | 0.1 | 11.0µm | Brightness temperature |
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BT_CH5 |
K | -7623* | 18788* | 0.1 | 12.0µm | Brightness temperature |
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TIMEOFDAY |
h | 0* | 2399* | 0.01 | Hours since start of day |
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RELAZ |
deg | -32768* | 32767* | 0.01 | Relative sensor azimuth angle |
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SZEN |
deg | 219* | 8546* | 0.01 | Solar zenith angle |
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VZEN |
deg | 0* | 6936* | 0.01 | View zenith angle, scale 0.01 |
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QA |
Quality control bit flags |
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Image Properties
Image Properties
Name | Type | Description |
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status | STRING | 'provisional' or 'permanent' |
Terms of Use
Terms of Use
The NOAA CDR Program's official distribution point for CDRs is NOAA's National Climatic Data Center which provides sustained, open access and active data management of the CDR packages and related information in keeping with the United States' open data policies and practices as described in the President's Memorandum on "Open Data Policy" and pursuant to the Executive Order of May 9, 2013, "Making Open and Machine Readable the New Default for Government Information". In line with these policies, the CDR data sets are nonproprietary, publicly available, and no restrictions are placed upon their use. For more information, see the Fair Use of NOAA's CDR Data Sets, Algorithms and Documentation pdf.
Citations
Eric Vermote, Chris Justice, Ivan Csiszar, Jeff Eidenshink, Ranga Myneni, Frederic Baret, Ed Masuoka, Robert Wolfe, Martin Claverie and NOAA CDR Program (2014): NOAA Climate Data Record (CDR) of AVHRR Surface Reflectance, Version 4. [indicate subset used]. NOAA National Climatic Data Center.
DOIs
Explore with Earth Engine
Code Editor (JavaScript)
var dataset = ee.ImageCollection('NOAA/CDR/AVHRR/SR/V4') .filter(ee.Filter.date('2018-05-01', '2018-06-01')); var surfaceReflectance = dataset.select('SREFL_CH1'); var surfaceReflectanceVis = { min: -1000.0, max: 9000.0, palette: ['003b02', '006a03', '008d05', '01be07', '01ff09', 'ffffff'], }; Map.setCenter(52.48, 71.72, 0); Map.addLayer(surfaceReflectance, surfaceReflectanceVis, 'Surface Reflectance');