Visual Magnitude Flux Rate Density Standards for Sunlight Incident on Photoemissive Surfaces.
Abstract
Based on the spectrum of the 'real' sun, a zero visual magnitude photon flux rate density of 5.00 x 10 to the 10th power p/sq. m-sec is calculated for a bandwidth of 0.300 micrometer to 0.920 micrometer, a range corresponding to the useful responsivity-bandwidths of both S-20 and S-25 photosurfaces. Over this bandwidth, the average quantum efficiencies of the photosurfaces are shown to agree to within 0.1 percent at a value of 7.2 percent. Finally, photon and photoelectron flux rate densities are calculated for sources of varying visual magnitudes and for transmission through one to five standard air masses. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 06, 1974
- Accession Number
- AD0779822
Entities
People
- Robert S Weber
Organizations
- Massachusetts Institute of Technology