[Parameters: Topic='ATMOSPHERE', Term='ATMOSPHERIC PRESSURE', Variable_Level_1='GRAVITY WAVE']
|
1KM NOAA AVHRR and TOVS Digital CCT product in SHARP level 2A format Entry ID: 1KM.AVHRR.TOVS.SHARP2A |
||||||||
|
[
Update this Record
]
|
Summary
|
Abstract:
The 1 km AVHRR Global Land Data set project is an international effort to acquire, archive, process and distribute the data of the entire global land surface observed by the NOAA/AVHRR satellite mission at 1 km resolution, in order to meet the needs of the international science community, (IGBP, 1992). A network of 29 High Resolution Picture Transmission (HRPT) stations, along with data recorded by the NOAA, has been acquiring daily global land coverage from the NOAA-11 satellite since the first of April 1992. The continuous flow of data coming from these stations is routinely archived by USGS and ESA. A common archive exists at the EROS data centre of the USGS and at the ESRIN of ESA. The number of pass acquired per year is around 15000. The project intends to process all acquired data to generate for any 10-day period in the project time-span (April 92 - September 94) a land composite product (1444k) covering the whole world surface, as defined by Townsend et al., 1992. AVHRR floating scenes are provided in SHARP format. SHARP is the ESA Earthnet format for AVHRR and TOVS data generated to provide an easy data access for the international Remote sensing user community. SHARP-1 consists of two volumes: AVHRR volume and TOVS volume. In addition, with the objective of providing the user with ready-to-use data, a family of higher level products has been proposed by Earthnet: this is SHARP level-2. The SHARP level-2A (Calibrated Product) contains calibrated data from the AVHRR channels (i.e. level 1 data calibrated and converted to measurements of Equivalent Reflectance, spectral Radiance and Brightness Temperature) and a classification of the image. Each pixel contains image data (calibrated), a classification and geographical information (boundaries, coastlines and lat/long grid flags). Each pixel consists of 2 bytes; 10 bits are used for image data, 3 bits for the classification and 3 bits for geographical data. The classification includes land, cloud, sea, snow/ice and unclassified pixels. SHARP-2 products are produced from archived SHARP-1 day-time data. SHARP-2 products will not be archived. TOVS data remains the same as for SHARP-1 products. For the Level 2A product, Level 1 raw data is calibrated and classified utilizing state-of-the-art algorithms. The visible channels (1 and 2) are converted from raw data to Equivalent Reflectance, while channels 4 and 5 (infrared) are converted to Brightness Temperature, corrected by nonlinear effects, and the third infrared channel (3) is converted to Spectral Radiance. Image data in each band of the Level 2A product: --------------- Band 1: Channel 1 Equivalent Reflectance Band 2: Channel 2 Equivalent Reflectance Band 3: Channel 3 Spectral Radiance Band 4: Channel 4 Brightness Temperature Band 5: Channel 5 Brightness Temperature --------------- Note: 'Band' refers to the output data structure of the SHARP products. 'Channel' refers to the input satellite data acquired in different wavelengths. This product can be produced with data from all the operating NOAA satellites; however, if the data is derived from the even-numbered satellites, band 5 is empty. Geometric Correction: Image navigation (location) is carried out during Level 1 data generation, using the orbital model for the satellite location and is tested by an operator who carries out further correction if necessary. SHARP-2 products are in the original spacecraft projection. A location grid of tie points (lat/long) is given in the suffix data (every 16th image file record). To order data, please see "http://earth.esa.int/helpandmail/help_order.html" |
Related URL
|
Link:
VIEW RELATED INFORMATION
Description: See 'SHARP-2 Technical Specification of Format' in the NOAA Document Library |
Geographic Coverage
| N: 90.0 | S: -5.0 | E: 50.0 | W: -45.0 |
|
Temporal Coverage
| Start Date: 1992-04-01 |
Location Keywords
|
CONTINENT
> EUROPE
> EASTERN EUROPE
> RUSSIA
GEOGRAPHIC REGION > EURASIA |
Science Keywords
| ATMOSPHERE >ATMOSPHERIC WATER VAPOR >HUMIDITY [Definition] |
| ATMOSPHERE >ATMOSPHERIC WATER VAPOR >WATER VAPOR >HUMIDITY [Definition] |
| BIOSPHERE >VEGETATION >VEGETATION COVER [Definition] |
| CRYOSPHERE >SEA ICE [Definition] |
| CRYOSPHERE >SNOW/ICE [Definition] |
| HUMAN DIMENSIONS >HABITAT CONVERSION/FRAGMENTATION >DEFORESTATION [Definition] |
| HUMAN DIMENSIONS >HABITAT CONVERSION/FRAGMENTATION >DESERTIFICATION >REGIONAL DESERTIFICATION [Definition] |
| HUMAN DIMENSIONS >ENVIRONMENTAL IMPACTS >OIL SPILLS [Definition] |
| LAND SURFACE >LAND USE/LAND COVER [Definition] |
| OCEANS >OCEAN TEMPERATURE >SEA SURFACE TEMPERATURE [Definition] |
| OCEANS >SEA ICE [Definition] |
| SPECTRAL/ENGINEERING >INFRARED WAVELENGTHS >THERMAL INFRARED [Definition] |
| SPECTRAL/ENGINEERING >VISIBLE WAVELENGTHS >VISIBLE IMAGERY [Definition] |
| ATMOSPHERE >ATMOSPHERIC CHEMISTRY >OXYGEN COMPOUNDS >OZONE [Definition] |
ISO Topic Category
|
BIOTA
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE |
Platform
| NOAA-11 >National Oceanic & Atmospheric Administration-11 [Information] |
| NOAA-12 >National Oceanic & Atmospheric Administration-12 [Information] |
| NOAA-14 >National Oceanic & Atmospheric Administration-14 [Information] |
Instrument
| TOVS >TIROS Operational Vertical Sounder [Information] |
| AVHRR >Advanced Very High Resolution Radiometer [Information] |
Project
| GTOS >Global Terrestrial Observing System [Information] |
Keywords
| EURASIA |
| IMAGERY |
| LAND COVER |
| MAPPING |
| METEOROLOGY |
| NORTH RUSSIA |
| OCEANOGRAPHY |
| SST |
| VEGETATION |
| WESTERN RUSSIA |
Data Set Progress
| IN WORK |
Originating Center
| ESA/ESRIN |
Data Center
|
Earthnet Online, European Space Agency
[Information]
Data Center URL: http://earth.esa.int
| |||
Distribution
|
Distribution_Media:
CCT, 6250bpi
|
|
Distribution_Media:
Exabyte 8200
|
Personnel
|
EARTH OBSERVATION HELP DESK Role: DIF AUTHOR Phone: +39 06 94180777 Fax: +39 06 94180292 Email: eohelp at esa.int Contact Address: ESA/ESRIN Via G. Galilei City: Frascati Postal Code: 00044 Country: Italy |
Creation and Review Dates
Last DIF Revision Date:
2009-04-20
| [ Update this Record ] |
