Processing Irradiance Measurement Data in the Field-of-View Domain
Abstract
The sensing of spatial imagery and spectral signatures involves the measurement of radiance. However detectors measure irradiance and the radiance must be inferred from that. This paper reports a method of processing irradiance measurement data to obtain radiance in a manner so as to reduce the errors caused by the unknown nonuniform illumination of the instantaneous-field-of-view (IFOV) of the individual optical detectors in an array of such detectors comprising an imaging or non-imaging sensor. Significant error and image distortion reductions seem to be achievable with this new approach. The derivative relationship between radiance and irradiance is implemented through its mathematical definition as a limit in a new coordinate space called the field-of-view domain. An appropriately chosen set of nested clusters of detectors surrounding and including the one of interest provides the data for forming the limit that is taken to an IFOV of zero angular width.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1997
- Accession Number
- ADA354976
Entities
People
- E. H. Bosch
- H. Berger