Abstract

A Hadamard-transform spectrometer has been used to obtain a spectrum of Jupiter from 880 cm⁻¹ to 770 cm⁻¹. Three ammonia absorption features stand out at 870 cm⁻¹, 851 cm⁻¹, and 833 cm⁻¹. The general shape of the spectrum implies an atmosphere with a monotonically decreasing temperature profile up to the 125 K level. In addition, transmission profiles of the earth’s atmosphere were taken between 16 μm and 25 μm for five consecutive nights under varying amounts of atmospheric water and air mass. There are many saturated lines, but nightly variations are constant and agree well with a theoretical profile. These results show that the Hadamard-transform technique is a useful method for obtaining astronomical spectra.

© 1974 Optical Society of America

Two Asymmetric Hadamard Transform Spectrometers

Martin Harwit, Perry G. Phillips, Leon W. King, and Daniel A. Briotta
Appl. Opt. 13(11) 2669-2674 (1974)

Theoretical Comparison of Singly Multiplexed Hadamard Transform Spectrometers and Scanning Spectrometers

N. M. Larson, R. Crosmun, and Y. Talmi
Appl. Opt. 13(11) 2662-2668 (1974)

Hadamard transform imager and imaging spectrometer

Roderick D. Swift, Richard B. Wattson, John A. Decker, Ralph Paganetti, and Martin Harwit
Appl. Opt. 15(6) 1595-1609 (1976)

Practical multi-spectrum Hadamard transform spectrometer

Ming Hing Tai, D. A. Briotta, Narayana S. Kamath, and Martin Harwit
Appl. Opt. 14(10) 2533-2536 (1975)

Infrared Radiometer for the Pioneer 10 and 11 Missions to Jupiter

M. L. Bender, P. W. Callaway, S. C. Chase, G. F. Moore, and R. D. Ruiz
Appl. Opt. 13(11) 2623-2628 (1974)