NOAA Climate Data Record (CDR) of AVHRR Polar Pathfinder (APP) Cryosphere, Version 2
This NOAA Climate Data Record (CDR) contains the AVHRR Polar Pathfinder (APP) product. APP is a fundamental CDR comprised of calibrated and navigated AVHRR channel data (reflectances and brightness temperatures), viewing and illumination geometry (sensor scan angle, solar zenith angle, and sun-sensor relative azimuth angle), Universal Coordinated Time (UTC) of the data acquisition, and a surface type mask. The data are twice daily composites of up to 23 orbits on a 5 km Equal-Area Scalable Earth (EASE)-Grid twice daily over both poles, the Arctic and Antarctic, from 1982 to the present. The daily APP composites are centered on local solar times of 14:00 (high sun, but could be nighttime for some polar areas in winter) and 04:00 for the Arctic or 02:00 for the Antarctic. The APP covers the north polar region (Arctic) from 48.4 degrees northward, and the south polar region (Antarctic) from -53.2 degrees southward. The update to version 2 of the APP FCDR was updated calibration coefficients for AVHRR GAC visible channels over the entire period.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| accrualPeriodicity | R/P1D |
| contactPoint |
{
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}
|
| describedByType | application/octet-steam |
| description | This NOAA Climate Data Record (CDR) contains the AVHRR Polar Pathfinder (APP) product. APP is a fundamental CDR comprised of calibrated and navigated AVHRR channel data (reflectances and brightness temperatures), viewing and illumination geometry (sensor scan angle, solar zenith angle, and sun-sensor relative azimuth angle), Universal Coordinated Time (UTC) of the data acquisition, and a surface type mask. The data are twice daily composites of up to 23 orbits on a 5 km Equal-Area Scalable Earth (EASE)-Grid twice daily over both poles, the Arctic and Antarctic, from 1982 to the present. The daily APP composites are centered on local solar times of 14:00 (high sun, but could be nighttime for some polar areas in winter) and 04:00 for the Arctic or 02:00 for the Antarctic. The APP covers the north polar region (Arctic) from 48.4 degrees northward, and the south polar region (Antarctic) from -53.2 degrees southward. The update to version 2 of the APP FCDR was updated calibration coefficients for AVHRR GAC visible channels over the entire period. |
| distribution |
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|
| identifier | gov.noaa.ncdc:C01579 |
| issued | 2019-05-01T00:00:00.000+00:00 |
| keyword |
[
"Earth Science > Spectral/Engineering > Infrared Wavelengths > Brightness Temperature",
"Geographic Region > Arctic",
"Continent > Antarctica",
"Vertical Location > Land Surface",
"Vertical Location > Sea Surface",
"AVHRR > Advanced Very High Resolution Radiometer",
"NOAA POES > NOAA Polar Orbiting Environmental Satellites",
"1 km - < 10 km or approximately .01 degree - < .09 degree",
"DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce",
"DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce"
]
|
| landingPage | https://doi.org/10.25921/X2X1-JR34 |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2019-05-01T00:00:00.000+00:00 |
| publisher |
{
"name": "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce",
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|
| references |
[
"http://www.igsoc.org/annals/25/",
"https://doi.org/10.25921/AE96-0E57",
"https://doi.org/10.1080/01431161.2010.496472",
"https://doi.org/10.1080/01431161.2010.496473"
]
|
| rights | otherRestrictions |
| spatial | 180.0,-90.0,-180.0,90.0 |
| temporal | 1982-01-01T00:00:00+00:00/1982-01-01T00:00:00+00:00 |
| title | NOAA Climate Data Record (CDR) of AVHRR Polar Pathfinder (APP) Cryosphere, Version 2 |
