One of the requirements for the Earth Observations Program is a multispectral imaging system for remote sensing in an earth orbiting satellite. This system should be capable of very broad spectral coverage so that a sufficient portion of the electromagnetic spectrum is available for examination to ensure that unique signatures of earth based details may be derived. Experimental evidence gathered during the past 5 years indicates that the region from 0.35 to 14 microns is particularly useful, with a spatial resolution of 25-100 feet desirable. Timeliness of data return and ease of subsequent data reduction are also important, particularly for such disciplines as Meteorology, Agriculture, pollution monitoring, etc.
C. K. Yutkowitz,
"A Solid State Multispectral Imager", Proc. SPIE 0027, Remote Sensing of Earth Resources and the Environment, (1 May 1972); doi: 10.1117/12.978138; https://doi.org/10.1117/12.978138