scholarly journals Spherical lamellar grating interferometer for airborne astronomical observations of far infrared objects

1977 ◽  
Vol 16 (1) ◽  
pp. 233 ◽  
Author(s):  
J. L. Pipher ◽  
M. P. Savedoff ◽  
J. G. Duthie
Keyword(s):  
Far Infrared ◽  
Astronomical Observations ◽  
Grating Interferometer

INVESTIGATIONS IN THE FAR-INFRARED WITH A LAMELLAR GRATING INTERFEROMETER

1967 ◽  
Author(s):  
Jerome M. Dowling ◽  
R. T. Hall ◽  
C. M. Randall ◽  
R. D. Rawcliffe
Keyword(s):  
Far Infrared ◽  
Grating Interferometer

scholarly journals Rotational spectroscopy of methyl mercaptan CH332SH at millimeter and submillimeter wavelengths

2019 ◽  
Vol 629 ◽  
pp. A73 ◽  
Author(s):  
Olena Zakharenko ◽  
Vadim V. Ilyushin ◽  
Frank Lewen ◽  
Holger S. P. Müller ◽  
Stephan Schlemmer ◽  
...  
Keyword(s):  
Far Infrared ◽  
Rotational Spectroscopy ◽  
Methyl Mercaptan ◽  
Mean Square ◽  
Mean Square Deviation ◽  
Astronomical Observations ◽  
Quantum Numbers ◽  
Submillimeter Wavelengths ◽  
Global Study ◽  
Millimeter And Submillimeter Wavelengths

We present a new global study of the millimeter (mm) wave, submillimeter (sub-mm) wave, and terahertz (THz) spectra of the lowest three torsional states of methyl mercaptan (CH3SH). New measurements have been carried out between 50 and 510 GHz using the Kharkiv mm wave and the Cologne sub-mm wave spectrometers whereas THz spectra records were used from our previous study. The new data, involving torsion–rotation transitions with J up to 61 and Ka up to 18, were combined with previously published measurements and fit using the rho-axis-method torsion–rotation Hamiltonian. The final fit used 124 parameters to give an overall weighted root-mean-square deviation of 0.72 for the dataset consisting of 6965 microwave (MW) and 16 345 far-infrared line frequencies sampling transitions within and between the ground, first, and second excited torsional states. This investigation presents a two-fold expansion in the J quantum numbers and a significant improvement in the fit quality, especially for the MW part of the data, thus allowing us to provide more reliable predictions to support astronomical observations.

A 750 mm balloon-borne telescope for far-infrared astronomical observations

1984 ◽  
Vol 17 (2) ◽  
pp. 160-168 ◽  
Author(s):  
R R Daniel ◽  
S K Ghosh ◽  
K V K Iyengar ◽  
D M Patkar ◽  
T N Rengarajan ◽  
...  
Keyword(s):  
Far Infrared ◽  
Astronomical Observations

Far-infrared solar brightness measured with a balloon-borne lamellar-grating interferometer

Solar Physics ◽  
1975 ◽  
Vol 40 (2) ◽  
pp. 337-349 ◽  
Author(s):  
P. Stettler ◽  
J. Rast ◽  
F. K. Kneub�hl ◽  
E. A. M�ller
Keyword(s):  
Far Infrared ◽  
Grating Interferometer ◽  
Solar Brightness

A 75 cm Balloon-Borne Telescope For Far-Infrared Astronomical Observations

1984 ◽  
Author(s):  
S N. Tandon ◽  
R R. Daniel ◽  
S K. Ghosh ◽  
K V. K. Iyengar ◽  
T N. Rengarajan ◽  
...  
Keyword(s):  
Far Infrared ◽  
Astronomical Observations
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