NOAA CDR AVHRR: Surface Reflectance, Version 5

Dataset Availability

1981-06-24T00:00:00Z–2013-12-31T00:00:00Z

Dataset Provider

NOAA

Earth Engine Snippet

ee.ImageCollection("NOAA/CDR/AVHRR/SR/V5")

Tags

avhrr cdr daily land noaa reflectance sr

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

See technical note from the data provider.

Provider's note: the orbital drift of N-19 (the last NOAA satellite carrying the AVHRR sensor) began to severely degrade the retrieved product quality. Therefore, VIIRS is now the primary sensor being used for these products from 2014-present.

Bands

Resolution
5566 meters

Bands

Name	Units	Min	Max	Scale	Wavelength	Description
SREFL_CH1		1*	10000*	0.0001	640nm	Bidirectional surface reflectance
SREFL_CH2		1*	10000*	0.0001	860nm	Bidirectional surface reflectance
SREFL_CH3		-32768*	32767*	0.0001	3.75µm	Bidirectional surface reflectance
BT_CH3	K	-32519*	30136*	0.1	3.75µm	Brightness temperature
BT_CH4	K	-32519*	31450*	0.1	11.0µm	Brightness temperature
BT_CH5	K	-7623*	18788*	0.1	12.0µm	Brightness temperature
TIMEOFDAY	h	0*	2399*	0.01		Hours since start of day
RELAZ	deg	-32768*	32767*	0.01		Relative sensor azimuth angle
SZEN	deg	219*	8546*	0.01		Solar zenith angle
VZEN	deg	0*	6936*	0.01		View zenith angle, scale 0.01
QA						Quality control bit flags
Bitmask for QA Bit 0: Unused 0: No 1: Yes Bit 1: Pixel is cloudy 0: No 1: Yes Bit 2: Pixel contains cloud shadow 0: No 1: Yes Bit 3: Pixel is over water 0: No 1: Yes Bit 4: Pixel is over sunglint 0: No 1: Yes Bit 5: Pixel is over dense dark vegetation 0: No 1: Yes Bit 6: Pixel is at night (high solar zenith) 0: No 1: Yes Bit 7: Channels 1-5 are valid 0: No 1: Yes Bit 8: Channel 1 value is invalid 0: No 1: Yes Bit 9: Channel 2 value is invalid 0: No 1: Yes Bit 10: Channel 3 value is invalid 0: No 1: Yes Bit 11: Channel 4 value is invalid 0: No 1: Yes Bit 12: Channel 5 value is invalid 0: No 1: Yes Bit 13: RHO3 value is invalid 0: No 1: Yes Bit 14: BRDF correction is invalid 0: No 1: Yes Bit 15: Polar flag, latitude over 60 degrees (land) or 50 degrees (ocean) 0: No 1: Yes

* estimated min or max value

Image Properties

Image Properties

Name	Type	Description
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

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

• https://doi.org/10.7289/V53776Z4

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('NOAA/CDR/AVHRR/SR/V5')
                  .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, 1);
Map.addLayer(surfaceReflectance, surfaceReflectanceVis, 'Surface Reflectance');

Open in Code Editor

NOAA CDR AVHRR: Surface Reflectance, Version 5

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 …

NOAA/CDR/AVHRR/SR/V5, avhrr,cdr,daily,land,noaa,reflectance,sr

1981-06-24T00:00:00Z/2013-12-31T00:00:00Z

Google Earth Engine

https://developers.google.com/earth-engine/datasets

• https://doi.org/10.7289/V53776Z4