NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
A new high-sensitivity superconducting receiver for mm-wave remote-sensing spectroscopy of the stratosphereWe describe a recently constructed ground-based mm-wave spectrometer incorporating a superconducting tunnel junction as a heterodyne mixer-receiver. Under conditions of low tropospheric water vapor, the superior sensitivity of this receiver allows spectral line measurements of stratospheric molecules with mixing ratios as small as a few tenths of a part per billion (e.g., ClO, HCN) to be made in 4 to 6 hours, with a signal to noise ratio of at least 30:1. We expect to be able to halve this time by further improvement of the mixer's intrinsic noise level.
Document ID
19950004661
Document Type
Conference Paper
Authors
Dezafra, R. L. (State Univ. of New York Stony Brook, NY, United States)
Mallison, W. H. (State Univ. of New York Stony Brook, NY, United States)
Jaramillo, M. (State Univ. of New York Stony Brook, NY, United States)
Reeves, J. M. (State Univ. of New York Stony Brook, NY, United States)
Emmons, L. K. (State Univ. of New York Stony Brook, NY, United States)
Shindell, D. T. (State Univ. of New York Stony Brook, NY, United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1994
Publication Information
Publication: NASA. Goddard Space Flight Center, Ozone in the Troposphere and Stratosphere, Part 2
Subject Category
INSTRUMENTATION AND PHOTOGRAPHY
Funding Number(s)
CONTRACT_GRANT: NAG1-1354
CONTRACT_GRANT: NAGW-2182
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

NameType 19950004661.pdf STI

Related Records

IDRelationTitle19950004531Analytic PrimaryWorkshop on the Analysis of Interplanetary Dust Particles