NOAA-11, NOAA-12 AVHRR HIGH RESOLUTION PICTURE TRANSMISSION (HRPT) DATA

W. Emery (University of Colorado, USA)

Announced availability: 1 January 1995

Data Access

NOAA-11 and NOAA-12 AVHRR/HRPT data are available upon request from the Colorado Center for Astrodynamics Research at the University of Colorado. Beginning June 1996, data will also be archived at the National Center for Atmospheric Research (NCAR) in Boulder, CO (http://www.ucar.edu/ucar/).

Background

The Advanced Very High Resolution Radiometer (AVHRR) is a five-channel scanning radiometer that was installed on the NOAA-11 and NOAA-12 Polar Orbiting Satellites. The radiometer provides day and night imaging in the visible (VIS) and infrared (IR), sea surface temperature (SST) determination, estimation of heat budget components and identification of snow and sea ice. The near-IR channel (channel 3: 3.55-3.99 um) and the two IR channels (channel 4: 10.2-11.5 um; channel 5: 11.5-12.5 um) are used to compute SST.

Full-resolution images for all bands, with a nadir field of view of 1.1 km, digitized to 10-bit precision, and corrected for panoramic distortion, are globally broadcasted as direct readout at VHF and S-band frequencies to local users. This real-time transmission is called High Resolution Picture Transmission.

Data File Information

The following NOAA-11 and NOAA-12 HRPT data are available upon request from the Colorado Center for Astrodynamics Research:

  1. Raw HRPT data as received at Townsville.
  2. Calibrated full pass HRPT data. (Use of standard CCAR NES-107 based calibration algorithm).
  3. Calibrated and navigated data. Navigation was performed per routines detailed in Baldwin et al. (in press). These data have individual channel brightness temperatures, satellite elevation, and solar zenith angle. Data are available on both the 4 km and 1 km level.
When requesting the data, please specify dates and data type needed.

For more information, please contact:

Andrew Wobido
Colorado Center for Astrodynamics Research
Campus Box 431
Boulder, CO 80309
USA

email: wobido@frodo.colorado.edu
Phone: (303) 492-8868
FAX: (303) 492-2825

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