Results 21 to 30 of about 276,908 (308)
Journal of Remote Sensing, 2023 High spatial-temporal resolution distribution of atmospheric gaseous pollutant is an important basis for tracing its emission, transport, and transformation. Typical methods for acquiring regional atmospheric gaseous pollutant distributions are satellite
Chuan Lu +9 more
doaj +1 more source
Sensitivity of remotely sensed trace gas concentrations to polarisation [PDF]
Atmospheric Measurement Techniques, 2015 Abstract. Current and proposed space missions estimate column-averaged concentrations of trace gases (CO2, CH4 and CO) from high resolution spectra of reflected sunlight in absorption bands of the gases. The radiance leaving the top of the atmosphere is partially polarised by both reflection at the surface and scattering within the atmosphere ...
D. M. O'Brien +2 more
openaire +3 more sources
Detection of ethane, methane, formaldehyde and water vapor in the 3.33 μm range [PDF]
Metrology and Measurement Systems, 2022 We describe construction and investigation results of optical trace gas sensor working in the 3.334–3.337 μm spectral range. Laser spectroscopy was performed with a multipass cell.
Mateusz Winkowski, Tadeusz Stacewicz
doaj +1 more source
Characterization and verification of ACAM slit functions for trace-gas retrievals during the 2011 DISCOVER-AQ flight campaign [PDF]
Atmospheric Measurement Techniques, 2015 The Airborne Compact Atmospheric Mapper (ACAM), an ultraviolet/visible/near-infrared spectrometer, has been flown on board the NASA UC-12 aircraft during the Deriving Information on Surface Conditions from Column and Vertically Resolved Observations ...
C. Liu +7 more
doaj +1 more source
Optics Express, 2021 A trace gas sensing technique of light-induced off-axis cavity-enhanced thermoelastic spectroscopy (OA-CETES) in the near-infrared was demonstrated by combing a high-finesse off-axis integrated cavity and a high Q-factor resonant quartz tuning fork (QTF).
Kaiyuan Zheng +8 more
semanticscholar +1 more source
Field Test of a Remote Multi-Path CLaDS Methane Sensor [PDF]
, 2015 Existing technologies for quantifying methane emissions are often limited to single point sensors, making large area environmental observations challenging.
Mulhall, Phil +5 more
core +5 more sources
Continuous wave optical parametric oscillator for quartz-enhanced photoacoustic trace gas sensing [PDF]
, 2007 A continuous wave optical parametric oscillator, generating up to 300 mW idler output in the 3–4 μm wavelength region, and pumped by a fiber-amplified DBR diode laser is used for trace gas detection by means of quartz-enhanced photoacoustic spectroscopy (
A. Henderson +33 more
core +6 more sources
Photoacoustic methane detection inside a MEMS microphone
Photoacoustics, 2023 An innovative laser based photoacoustic (PA) gas sensing concept with intrinsic miniaturization potential was developed and investigated for methane trace gas detection.
Thomas Strahl +4 more
doaj +1 more source
PLoS ONE, 2022 A quantitative monitoring system for fractional exhaled nitric oxide (FENO) in homes is very important for the control of respiratory diseases such as asthma.
Pengjiao Sun, Yunbo Shi, Yeping Shi
doaj +2 more sources
Low Power Greenhouse Gas Sensors for Unmanned Aerial Vehicles
Remote Sensing, 2012 We demonstrate compact, low power, lightweight laser-based sensors for measuring trace gas species in the atmosphere designed specifically for electronic unmanned aerial vehicle (UAV) platforms.
David J. Lary +8 more
doaj +1 more source