Remote Sensing of Hydrazine Compounds Using a Dual Mini-TEA CO2 Laser DIAL System
- 247 Downloads
In this paper we describe our direct-detection, pulsed, dual-CO2 laser differential-absorption LIDAR (DIAL) system and report the results of measurements using this system to demonstrate the practicability of remote sensing of hydrazine, unsymmetrical dimethyl hydrazine (UDMH) and monomethyl-hydrazine (MMH). The measurements involved LIDAR returns from a topographic target located 2.7 km from the laboratory and, to our knowledge, represent the first test of laser remote sensing of highly toxic hydrocarbon species having broad band as opposed to simple line spectra. It was found during these experiments that atmospheric fluctuations were the major factor limiting the sensitivity of these measurements. Additional experiments were carried out to achieve a better understanding of these fluctuations and of the improvements achievable through signal averaging. The results of these experiments are also discussed.
KeywordsAtmospheric Attenuation lIDAR Return Atmospheric Background Unsymmetrical Dimethyl Hydrazine DIAl System
Unable to display preview. Download preview PDF.
- 4.To avoid confusion, the large container used for remote sensing will be referred to as a tank. The term cell will be reserved for the Pyrex container used in the laboratoy absorption measurements.Google Scholar
- 5.H. W. Schiessl, “Hydrazine and its Derivatives” in Kirk-Othmer: Encyclopedia of Chemical Technology, Vol. 12, 3rd Edition (John Wiley & Sons, Inc., New York, 1980).Google Scholar
- 6.D. A. Stone, “The Autoxidation of Hydrazine Vapor,” CEEDO-TR-78–17, AFESC, Tyndall Air Force Base (1978), and private communication.Google Scholar
- 7.D. A. Stone, “Autoxidation of Hydrazine, Monomethylhydrazine and Unsymmetrical Dimethyl hydrazine,” in SPIE Proceedings, Vol. 289, 1981 International Conference on Fourier Transform Infrared Spectroscopy, H. Sakai, Editor, (1981), p. 45.Google Scholar
- 10.R. A. McClatchey, R. W. Fenn, J. E. A. Selby, F. E. Volzand G. S. Garing, “Optical Properties of the Atmosphere (Third Edition),” Report AFCRL-72–0497, Environmental Research Paper No. 411 (1972).Google Scholar
- 11.N. Menyuk, D. K. Killinger and W. E. DeFeo, “Laser Remote Sensing of Hydrazine, MMH and UDMH Using a Differential-Absorption CO2 LIDAR,” (to be published).Google Scholar
- 12.C. R. Menyuk, N. Menyuk and D. K. Killinger (to be published).Google Scholar