Skip to feedback

Attention:

We're excited to announce that we've undergone a complete website redesign to enhance your browsing experience! Our fresh new look is designed to make navigation easier and content more accessible. Click here to be taken to the new OSPO homepage. Should you have any questions please reach out to the OSPO Webmaster.

» OSPO Home
» DOC » NOAA » NESDIS » OSPO
NOAA Office of Satellite and Product Operations

Operational Calibration of the Imagers and Sounders
on the GOES-8 and -9 Satellites, Page 2

Michael Weinreb, Michael Jamieson, Nancy Fulton, Yen Chen, Joy Xie Johnson,
James Bremer, Carl Smith, and Jeanette Baucom



ABSTRACT

The operational in-orbit calibration of the GOES-8 and -9 imagers and sounders is described. In the infrared channels, the calibration is based on observations of space and an on-board blackbody. The calibration equation expresses radiance as a quadratic in instrument output. To suppress noise in the blackbody sequences, the calibration slopes are filtered. The calibration equation also accounts for an unwanted variation of the reflectances of the instruments' scan mirrors with east-west scan position, which was not discovered until the instruments were in orbit. The visible channels are not calibrated, but the observations are provided relative to the level of space and are normalized to minimize east-west striping in the images. Users receive scaled radiances in a GVAR (GOES VARiable format) data stream. The procedure users may apply to transform GVAR counts to radiances, temperatures, and "mode-A" counts is described.


Next  |  Table of Contents



Contact Michael P. Weinreb at michael.weinreb@noaa.gov
Latest Revision: July 9, 1997
[an error occurred while processing this directive] [an error occurred while processing this directive]