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Phillips, P. G.

Publications and source records attributed to Phillips, P. G..

5 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1973

Hadamard transform spectrometry of the atmospheres of Earth and Jupiter

A Hadamard-transform spectrometer was used to obtain a spectrum of Jupiter from 880-770/cm. Three ammonia absorption features stood out at 870, 851, and 833/cm. The general shape of the spectrum implied an atmosphere with a monotonically decreasing temperature profile up to the 125 K level. Transmission profiles of the earth's atmosphere were taken between 16 microns and 25 for five consecutive nights under varying amounts of atmospheric water and air mass. There are many saturated lines, but nightly variations were fairly constant and agreed well with a theoretical profile. These results show that the Hadamard-transform technique is a useful method for obtaining astronomical spectra.

Phillips, P. G.↗
NASA NTRS1971

Doubly multiplexing dispersive spectrometer.

Description of a spectrometer that incorporates 19 entrances and 19 exit slots. The instrument's dual capability to perform either one-dimensional imaging or alternately to give a spectrum with a high SNR over the entire source is shown. The instrument operates in the Littrow mode at f/8. The slot width and length for each mask are 0.625 and 3.5 mm, respectively, giving a total aperture length of 12.1 mm. The corresponding resolving power at 1.7 microns is 230.

Phillips, P. G.↗