Why use a microdensitometer other than a PDS?

Details Why use a microdensitometer other than a PDS? Why use a microdensitometer other than a PDS?

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984asmd.conf..209s&link_type=abstract

In NASA. Goddard Space Flight Center Astron. Microdensitometry Conf. p 209-228 (SEE N84-28020 18-35)

Computer Science

Performance

Astronomy, Microdensitometers, Optical Measurement, Photometers, Astronomical Photometry, Comparison, Feasibility Analysis, Optical Density, Performance Tests, Product Development

Scientific paper

The motivations for constructing a special purpose built microdensitometer are explored. The salient points of some of the microdensitometers are described and the advantages and disadvantages of the system in comparison to a PDS machine are outlined. The principal gain is in speed though at the expense of loss in dynamic range. The effects on the astronomical results are demonstrated. The astronomical results already obtained with these machines and from ongoing projects are described. It is shown that there is a large class of important astronomical problems which can be tackled by these machines but which are not feasibile on the PDS because of the speed of the machine.

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