. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography machine time on both, conical and line straightened data, the feature described as the anticyclonic edge could not be identi- fied, although it is clearly brought out in the photographic enhancements Csee Fig. ). Further effort to bring out the anticyclonic edge was judged to be unwarranted and attention was turned to the plume feature which is visible in Fig. , and which preliminary computer enhancement showed to be a useful area in which to
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography machine time on both, conical and line straightened data, the feature described as the anticyclonic edge could not be identi- fied, although it is clearly brought out in the photographic enhancements Csee Fig. ). Further effort to bring out the anticyclonic edge was judged to be unwarranted and attention was turned to the plume feature which is visible in Fig. , and which preliminary computer enhancement showed to be a useful area in which to 20 15 12 10 9 8 7 6 DATA SAMPLE INTERVAL Figure Power spectitwi of the radiance in the unfiltered S-192 ooniaal format. Significant noise is noted every 15, 8-9} and 6 data points. Before a general computer enhancement technique was develop- ed, the data were examined for periodic features in a spectrum. Figure is a spectrum of data specially provided for this experiment that was to be high-pass filtered only; the calibrat- ion of the S-19 2 data is considered a high-pass filter. Significant periods at about 15 data sample interval? are noted in these conical data as has been reported (Schell, Pnilco-JSC, personal communication, 1975). The line-straightened data (see Figure ) have been band-pass filtered to remove this 15-data- sample periodicity. The wavy patterns near the edge of clouds are the result of filter ringing. Computer Enhancement Computer enhancement of S-19 2 data was an objective of the experiment. The technique described below is a step toward automatic detection of clouds in multispectral data. The goal is to use a near infrared channel Cchannel 8 in this case) to specify where cloud-free areas are, for analysis of sea surface temperature or ocean color. Channel 8 CO. 9 8 3 jim) is selected as the cloud discri- mination channel because there is a maximum in the atmospheric transmissivity at this wavelength, and a maximum in the 170. P
Size: 1998px × 1250px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, bookcollectionamericana, bookleafnumber190
