Sun spectrometer for route determination of methane from helicopter

Anatolyi A. Liberman

doi:10.1117/12.417370

14 February 2001 Sun spectrometer for route determination of methane from helicopter

Anatolyi A. Liberman

Proceedings Volume 4199, Water, Ground, and Air Pollution Monitoring and Remediation; (2001) https://doi.org/10.1117/12.417370
Event: Environmental and Industrial Sensing, 2000, Boston, MA, United States

Abstract

12 The difficulty of a atmosphere mix monitoring problem from flying apparatus consists in a small level of scattered light from an earthly surface. With increase of height of flight the level of light exposure of the photoreceiver device decreases under the square-law. In particular it is essential for spectral monitoring in the IR range, where there are no high-sensitivity photoreceivers. Just it creates restrictions for lidars application at impurity gases monitoring in atmosphere. Such restriction is not present at solar spectrometers, as with increase of height of flight is increased and area of an observable earthly surface. In the report it's brought the description of solar spectrometer for research of methane in a near-earth layer of atmosphere. The entrance part of the device consists from interference light filter, scanned Fabry-Perot interferometer and focusing lens. The research carry out on 1666 nm wavelength. As the photoreceiver is used cooled the germanium photo diode. In spite of the fact that the device works on group rather poorly absorbing transitions of methane, as against transitions close 3300 - 3400 nm, the higher sensitivity is provided at the expense of application of the more sensitive photoreceiver. Thus, the sensitivity of the device reaches 16 ppm*m, that allows to determine methane concentration at a level 0.1 ppm.

Citation Download Citation

Anatolyi A. Liberman "Sun spectrometer for route determination of methane from helicopter", Proc. SPIE 4199, Water, Ground, and Air Pollution Monitoring and Remediation, (14 February 2001); https://doi.org/10.1117/12.417370

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Methane

Absorption

Spectroscopy

Signal detection

Atmospheric monitoring

Earth's atmosphere

Sun

Show All Keywords

Keywords/Phrases

Search In:

Publication Years