An all-solid-state, high-resolution and frequency-calibrated THz spectrometer based on optical heterodyne in low-temperature-grown (LTG) GaAs been constructed.

THz-waves diode lasers photomixing source calibrat↗

NASA NTRS1999

Submillimeter-Wave Measurements and Analysis of the Ground and V(sub 2) - 1 States of Water

In order to facilitate further studies of water in the interstellar medium , the envelopes of late type stars, jets, and shocked regions, the frequencies of 17 newly measured H(sub 2) (sup 16)O translations between 0.841 and 1.575 THz are reported.

interstellar molecules laboratory spectra line ide↗

NASA NTRS1999

Performance of a 2.5 THz Receiver Front-End for Spaceborne Applications

UNKNOWN

THz↗

NASA NTRS1999

Construction and Calibration of a Difference Frequency Laser Spectrometer and New THZ Frequency Measurements of Water and Ammonia

UNKNOWN

Photomixing↗

NASA NTRS1999

A2.5 THz Receiver Front-End for Spaceborne Applications

The OH radical is an important player in known ozone depletion cycles; however, due to its location in the atmosphere, it must be studied from either a balloon or spaceborne platform.

THz↗

NASA NTRS1999

THz Spectroscopy of the Atmosphere

THz spectroscopy of the atmosphere has been driven by the need to make remote sensing measurements of OH.

Atmosphere↗

NASA NTRS1999

An Analysis of the Torsion-Rotation-Vibration Rotational Spectrum of the Lowest In-Plane Bend and First Excited Torsional State of the C(sub 3v) Internal Rotor C(sub 2)H(sub 5)CN

Explore the source record for details and available documents.

Rotational Spectrum↗

NASA NTRS1998

A Torsion-Rotation-Vibration Interaction Analysis of the Lowest In-Plane Bend and First Excited Torsional State Rotational Spectrum of the C3v Internal Rotor C2H5CN

Explore the source record for details and available documents.

torsion-rotation-vibration↗

NASA NTRS1993

Fourier Transform Infrared Emission and Rotational Spectra of Chi super 2 Sigma super+States of SrH and SrD

This paper describes observations of the rotation-vibration emission spectrum of SrH using a high-resolution Bruker IFS 120 spectrometer.

diatomic metal hydrides alkaline Earth metals Four↗

NASA NTRS1990

VLSI corrector chip for space-borne mm-wave radiometer spectrometers

JPL developed a 52-channel 150 MHz bandwidth autocorrelator spectrometer using specially designed ECL gate array correlator chips. The characteristics of the ECL chip and the 52-channel auto-correlator are described. These autocorrelator spectrometers will be used with space-borne mm-wave radiometers for remote sensing of the Earth's atmosphere and astrophysical observations.

Chandra, K.↗

NASA NTRS1990

Ozone measurements from the Balloon Intercomparison Campaign

Measurements of the Balloon Intercomparison Campaign (BIC), conducted during fall, 1982 (BIC-1) and summer, 1983 (BIC-2), are reported. Results of five remote and two in situ techniques agree (with a few exceptions) within 95-percent confidence level uncertainties and generally within 15 percent above 20 km. Weighted mean profiles, which best represent conditions during the campaign, are used as a comparison standard. Accuracies of experiments indicated by BIC generally confirm estimated uncertainties for ECC sondes, UV photometry, and microwave emission experiments, are somewhat better for far-IR emission and IR absorption experiments, and are somewhat worse for IR emission and solar UV absorption experiments. The large collection of BIC measurements confirms a problem reported earlier with current theoretical modeling of ozone near 40 km.

Robbins, D.↗