Abstract

A successive approximation is presented for determining the hydroxyl rotational temperature from a comparison of successively approximated intensities of the rotational lines, which are, in the state of raw data, resolved as the [P₁(4) + P₂(4)], [P₁(3) + P₂(3)], and [P₁(2) + P₂(2)] lines. It is found that the determination of rotational temperatures using this successive approximation is far less time-consuming and more convenient than the usual synthetic spectra method, especially in treating numerous spectra from OH bands. As an example, the nighttime variations of the rotational temperature obtained every 6 min with this successive approximation are presented.

© 1979 Optical Society of America

Fast spectrometer for ground-based observations of OH rotational temperature

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