Atmospheric contrast transmittance monitor
Abstract
An atmospheric contrast transmittance monitor is described which comprises an electro-optical system including three solid state transducer assemblies interfaced with a small dedicated microcompressor for control of the system in either semi-automatic or operator interactive modes for real time monitoring of the optical state of the atmosphere, one assembly comprising a compact multi-channel nephelometer of novel configuration for providing directional volume scattering function measurements on atmospheric samples, and a pair of staring fisheye lens scanners and associated detectors for scanning the upper and lower hemisphere radiance distributions. The system requires only a few hundred watts of input power and is less than one meter in length overall, and, operating in pulsed mode, has been used to measure the scattering characteristics of clear-day room air, with adequate sensitivity to suggest the capability of measurements approaching .00001/m i.e., sea level molecular.
- Publication:
-
Air Force Interim Report
- Pub Date:
- September 1986
- Bibcode:
- 1986aifo.reptT....J
- Keywords:
-
- Atmospheric Optics;
- Contrast;
- Electro-Optics;
- Monitors;
- Nephelometers;
- Radiation Measuring Instruments;
- Transmittance;
- Atmospherics;
- Microprocessors;
- On-Line Systems;
- Patent Applications;
- Real Time Operation;
- Scanning;
- Solid State Devices;
- Transducers;
- Instrumentation and Photography