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Advanced Very High Resolution Radiometer

Entry ID: gov.noaa.class.AVHRR

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Summary

Abstract: ABSTRACT: The Advanced Very High Resolution Radiometer (AVHRR) is a cross-track scanning system with five spectral bands having a resolution of 1.1 km and a frequency of earth scans twice per day (0230 and 1430 local solar time). There are three data types produced from the POES AVHRR. The Global Area Coverage (GAC) data set is reduced resolution image data that is processed onboard the satellite ... taking only one line out of every three and averaging every four of five adjacent samples along the scan line; the Local Area Coverage (LAC) data set is recorded onboard at original resolution (1.1 km) for part of an orbit and later transmitted to earth; and the High Resolution Picture Transmission (HRPT) is real-time downlink data. A fourth data type, Full Resolution Area Coverage (FRAC 1.1 km) is now available daily for the entire globe with the launch of MetOp-A, on October 19, 2006, Europe's first polar orbiting operational meteorological satellite system and the first of the European contribution to the Initial Joint Polar-Orbiting Operational Satellite System (IJPS). AVHRR data provide opportunities for studying and monitoring vegetation conditions in ecosystems including forests, tundra and grasslands. Applications include agricultural assessment, land cover mapping, producing image maps of large areas such as countries or continents, and tracking regional and continental snow cover. AVHRR data are also used to retrieve various geophysical parameters such as sea surface temperatures and energy budget data.

SUPPLEMENTAL INFORMATION: Data types: Global Area Coverage (GAC) Local Area Coverage (LAC 1.1km) High Resolution Picture Transmission (HRPT) Full Resolution Area Coverage (FRAC 1.1 km)

CURRENTNESS REFERENCE: ground condition

1B NOAA 1b formatting has evolved as follows: * Original 1B format: Used until September 8, 1992. * Version 1: Used between September 8, 1992 and November 15, 1994. * Version 2: Used on all NOAA KLM (NOAA-15, 16 and 17) data until April 28, 2005. * Version 3: Level 1b format for data processed from the NOAA-15, 16 and 17 instruments beginning in early 2005.For more detailed information go to: http://www.ncdc.noaa.gov/oa/pod-guide/ncdc/docs/intro.htm.

Electronic download (FTP) of the data is free. There is a fee for copies of data on physical media. Optical disks are $25.00 per unit and magnetic tape is $100 per unit. Price does not include additional service and handling costs.

Purpose: PURPOSE: The objective of the AVHRR instrument is to provide radiance data for investigation of clouds, land-water boundaries, snow and ice extent, ice or snow melt inception, day and night cloud distribution, temperatures of radiating surfaces, and sea surface temperature, through passively measured visible, near infrared and thermal infrared spectral radiation bands.

Related URL

Link: GET DATA > NOAA CLASS

Description: Download options for AVHRR level 1b datasets.

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 90.0

S: -90.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Originator/Creator: DOC/NOAA/NESDIS/OSDPD/IPD > Information Processing Division, Office of Satellite Data Processing and Distribution, NESDIS, NOAA, U.S. Department of Commerce

Dataset Title: Advanced Very High Resolution Radiometer

Dataset Release Date: 1978-11-05

Dataset Release Place: Suitland, MD

Dataset Publisher: DOC/NOAA/NESDIS/NCDC/SSB > Satellite Services Branch, NCDC, NESDIS, NOAA, U.S. Department of Commerce

Online Resource: http://www.class.noaa.gov/nsaa/products/search?sub_id=0&datatype_fa...

Temporal Coverage

Start Date: 1978-11-05

Location Keywords

GEOGRAPHIC REGION > GLOBAL

Data Resolution

Latitude Resolution: 1.1 km
Longitude Resolution: 1.1 km
Horizontal Resolution Range: 1 km - < 10 km or approximately .01 degree - < .09 degree

Science Keywords

SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS

SPECTRAL/ENGINEERING > VISIBLE WAVELENGTHS

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Platform

NOAA-10 > National Oceanic & Atmospheric Administration-10

NOAA-11 > National Oceanic & Atmospheric Administration-11

Access Constraints Public and free

Use Constraints Limited to commercial use

Ancillary Keywords

South Ocean

Chlorophyll a

Originating Center

Institute of Oceanology,Chinese Academy of Sciences

Data Center

Polar Research Institute of China

Data Center URL: http://www.pric.gov.cn/enindex.asp

Data Center Personnel
Name: JIE ZHANG Phone: (703) 993-2400 Email: jzhang7 at gmu.edu Contact Address: 4400 University Drive, MSN 3A4 City: Fairfax Province or State: VA Postal Code: 22030 Country: United States