Authors / CoAuthors
Unknown
Abstract
The AVHRR sensor collects global data on a daily basis for a variety of land, ocean, and atmospheric applications. Specific applications include forest fire detection, vegetation analysis, weather analysis and forecasting, climate research and prediction, global sea surface temperature measurements, ocean dynamics research and search and rescue. The first operational NOAA satellite (NOAA-6) was launched in 1979. This was followed by a series of additional NOAA satellites with the latest launch being NOAA-16 in September 2000. NOAA's 11, 12, 14, 15 and 16 are all still transmitting data. The AVHRR sensor is a five or six channel (depending on the model) scanner, sensing the visible, near-infrared, and thermal infrared portions of the electromagnetic spectrum. It provides global on board collection of data over a 2399 km swath. The sensor orbits the earth 14 times each day from an altitude of 833 km. ACRES keeps a 7 day old rolling archive which is available free to registered users. Acquisitions older than 7 days are archived by CSIRO Earth Observation Centre.
Product Type
dataset
eCat Id
47946
Contact for the resource
Custodian
Owner
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- Satellite ImageryNOAA
- ( Theme )
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- satellite imagery
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
- ( Theme )
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- DC2020
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- Published_Internal
Publication Date
2003-06-17T00:00:00
Creation Date
Security Constraints
Legal Constraints
Status
Purpose
Maintenance Information
asNeeded
Topic Category
imageryBaseMapsEarthCover
Series Information
Lineage
The NOAA AVHRR data set is acquired by earth orbiting remote sensing satellites. These satellites carry two types of sensor systems known as "active" and "passive". A "passive" system generally consists of an array of small sensors or detectors which record (as digital numbers) the amount of electro-magnetic radiation reflected and/or emitted from the Earth's surface. NOAA AVHRR is a passive system. The digital data acquired by the satellites are transmitted to ground stations and can be used to reconstitute an image of the Earth's surface not too dissimilar to an aerial photograph. Data are received through the ACRES antennae at the Data Acquisition Facilities at Alice Springs enabling coverage of the Australian landmass. The recorded data are sent via a high speed communication link daily to the Data Processing Facility in Canberra where it is catalogued and archived for 7 days. Data are recorded and archived by orbit, or swath. If the region of interest extends across two adjacent paths the appropriate data set from each path will need to be extracted. Because of the orbital parameters of the satellite, adjacent paths are not acquired sequentially and information from each path may differ according to the time delay between the two passes. Data are provided as digital data products which can be viewed and manipulated on a variety of software systems. However, the data transmitted to Earth from an Earth observation satellite are in a form unsuitable for use by customers so ACRES processes this raw data in varying degrees to produce products suitable for use by clients. ACRES processes NOAA AVHRR data within 12 hours of acquisition and places it on the ACRES web pages for ftp download for a limited time. Historical NOAA AVHRR data may be accessed from CSIRO Earth Observation Centre.
Parent Information
Extents
[-90.0, -9.0, 45.0, 168.0]
Reference System
Spatial Resolution
Service Information
Associations
Source Information
Source data not available.