Search NASASearch

Engineering topics

Alford, W.

Publications and source records attributed to Alford, W..

LANDSAT-4 multispectral scanner (MSS) subsystem radiometric characterization

The multispectral band scanner (mass) and its spectral characteristics are described and methods are given for relating video digital levels on computer compatible tapes to radiance into the sensor. Topics covered include prelaunch calibration procedures and postlaunch radiometric processng. Examples of current data resident on the MSS image processing system are included. The MSS on LANDSAT 4 is compared with the scanners on earlier LANDSAT satellites.

Alford, W.

Interpretation techniques development

Processing, interpretation, classification, recognition, and enhancement techniques for use with ERTS-1 multispectral-imagery - Conference

Alford, W.