The photographs taken on night 2 did not reveal anything unusual despite undergoing
microdensitometer scans.
patent for "Spot
Microdensitometer for the Spectral Density Analysis of Film." In addition, Shih was founder and director of the Center for Remote Sensing at the University of Florida.
The scattered intensities were obtained from the photographic films using a unidimensional
microdensitometer. The scattered intensity (I) was obtained at different scattering angles ([Theta]) by averaging a number of diametrical readings through the center of the main beam position and subtracting the background from the intensity curve.
During the 1970s astronomers confirmed this characteristic pattern, now referred to as the "quadrupole azimuthal brightness asymmetry," by scanning scores of photographic plates of Saturn with a
microdensitometer. It appears in the Voyager and Hubble Space Telescope images as well.
The scattered intensities were obtained from the photographic films using a one-dimensional
microdensitometer. The scattered intensity (I) was obtained for different scattering angles ([Theta]) by averaging a number of diametrical readings through the center of the main beam position and subtracting the background from the intensity curve.
CCD cameras have replaced glass plates, image-processing software has supplanted scanning
microdensitometers, and satellite-based star catalogs have eliminated the need to measure star positions six months before or after the eclipse.