Processing techniques for global land 1-km AVHRR data
Pecora 12 Symposium
- Jeffery C. Eidenshink, Daniel R. Steinwand, Charles E. Wivell, Douglas M. Hollaren, David J. Meyer
- The Publications Warehouse does not have links to digital versions of this publication at this time
The U.S. Geological Survey's (USGS) Earth Resources Observation Systems (EROS) Data Center (EDC) in cooperation with several international science organizations has developed techniques for processing daily Advanced Very High Resolution Radiometer (AVHRR) 1-km data of the entire global land surface. These techniques include orbital stitching, geometric rectification, radiometric calibration, and atmospheric correction.
An orbital stitching algorithm was developed to combine consecutive observations acquired along an orbit by ground receiving stations into contiguous half-orbital segments.
The geometric rectification process uses an AVHRR satellite model that contains modules for forward mapping, forward terrain correction, and inverse mapping with terrain correction. The correction is accomplished by using the hydrologic features coastlines and lakes from the Digital Chart of the World. These features are rasterized into the satellite projection and are matched to the AVHRR imagery using binary edge correlation techniques. The resulting coefficients are related to six attitude correction parameters: roll, roll rate, pitch, pitch rate, yaw, and altitude. The image can then be precision corrected to a variety of map projections and user-selected image frames.
Because the AVHRR lacks onboard calibration for the optical wavelengths, a series of time-variant calibration coefficients derived from vicarious calibration methods and are used to model the degradation profile of the instruments.
Reducing atmospheric effects on AVHRR data is important. A method has been develop that will remove the effects of molecular scattering and absorption from clear sky observations, using climatological measurements of ozone. Other methods to remove the effects of water vapor and aerosols are being investigated.
Additional Publication Details
- Publication type:
- Publication Subtype:
- Journal Article
- Processing techniques for global land 1-km AVHRR data
- Series title:
- Pecora 12 Symposium
- Year Published:
- American Society for Photogrammetry and Remote Sensing
- Publisher location:
- Bethesda, MD
- 9 p.
- Larger Work Type:
- Larger Work Subtype:
- Journal Article
- First page:
- Last page:
- Number of Pages: