New Wavenumber Calibration Tables From Heterodyne Frequency Measurements.

This new calibration atlas is based on frequency rather than wavelength calibration techniques for absolute references. Since a limited number of absolute frequency measurements is possible, additional data from alternate methodology are used for difference frequency measurements within each band investigated by the frequency measurements techniques. Data from these complementary techniques include the best Fourier transform measurements available.

Infrared Absorption Spectrum of Nitrous Oxide (NO) From 1830 cm to 2270 cm.

The frequencies of the vibration-rotation spectrum of NO have been measured from 1830 cm to 2270 cm. A number of weak bands have been measured and assigned to "hot bands'' and isotopic species in normal abundance. By using the Ritz principle and previously measured bands the bending frequency ( ) is calculated as 588.

Absorption Bands of Carbon Dioxide From 5.3 to 4.6 Microns.

Measurements have been made of the frequencies of the infrared absorption lines of CO in the region from 1850 cm to 2150 cm. Observations were made at various pressures and pathlengths up to a maximum of 72 meter-atmospheres. Vibration-rotation constants were obtained characterizing the transitions 11 0-000, 11 0-000, 03 0-000, 03 0-000, 200-01 0, I2 0-01 0, 12 0-01 0 for CO.