Atmospheric monitoring using heterodyne detection techniques
Abstract
Both passive and active remote-monitoring instruments using discretely tunable infrared gas lasers and heterodyne receivers have been used for measurements of ozone and other trace constituents in the atmosphere. A ground-based solar heterodyne radiometer has been used in discrete spectral regions near 9.5 microns to measure altitude profiles of ozone in both the troposphere and stratosphere. Results indicate that this technique shows promise in providing calibration points for earth-orbiting ozone-measurement instruments. An airborne laser absorption spectrometer has been used to measure tropospheric ozone in two series of flights during the winter and spring of 1977, and these operations are described. Plans are also in progress to fly a balloon-borne heterodyne radiometer during the fall of 1977 in order to measure stratospheric trace species.
- Publication:
-
Optical Engineering
- Pub Date:
- February 1978
- Bibcode:
- 1978OptEn..17...44M
- Keywords:
-
- Absorption Spectroscopy;
- Balloon-Borne Instruments;
- Environmental Monitoring;
- Gas Lasers;
- Infrared Lasers;
- Optical Heterodyning;
- Gases;
- Ozone;
- Remote Sensors;
- Stratosphere;
- Trace Elements;
- Troposphere;
- Instrumentation and Photography