Results 21 to 30 of about 877 (209)

Development of water vapor DIAL and comparison with Raman lidar [PDF]

EPJ Web of Conferences
Vertical profile measurements of water vapor are important for improving early prediction accuracy of heavy rainfall. Developing a low-maintenance lidar is expected to establish an extensive lidar observation network to reduce water-related hazards such ...
Uchiho Yuichi, Matsuki Kazuto, Takeuchi Eiji, Hasegawa Toshikazu   +3 more
doaj   +1 more source

Advances in Diode-Laser-Based Water Vapor Differential Absorption Lidar

EPJ Web of Conferences, 2016
An advanced diode-laser-based water vapor differential absorption lidar (WV-DIAL) has been developed. The next generation design was built on the success of previous diode-laser-based prototypes and enables accurate measurement of water vapor closer to ...
Spuler Scott, Repasky Kevin, Morley Bruce, Moen Drew, Weckwerth Tammy, Hayman Matt, Nehrir Amin   +6 more
doaj   +1 more source

Differential Absorption Lidar (DIAL) Measurements of Landfill Methane Emissions

Remote Sensing, 2017
Methane is one of the most important gaseous hydrocarbon species for both industrial and environmental reasons. Understanding and quantifying methane emissions to atmosphere is therefore an important element of climate change research.
Fabrizio Innocenti, Rod Robinson, Tom Gardiner, Andrew Finlayson, Andy Connor   +4 more
doaj   +1 more source

First Steps of Maturation Towards Space of Nested Cavity Optical Parametric Oscillator and Amplifiers for DIAL Based on Periodically Poled Nonlinear Materials [PDF]

EPJ Web of Conferences, 2020
We report on the first steps of maturation towards space of a nested cavity optical parametric oscillator and amplifiers, based on periodically poled nonlinear materials, emitting in the 2µm range for multi species differential absorption lidar (DIAL).
Dherbecourt Jean-Baptiste, Melkonian Jean-Michel, Lebat Vincent, Tanguy Nicolas, Duzellier Sophie, Blanchard Cedric, Coetzee Rian S., Canalias Carlota, Pasiskevicius Valdas, Godard Antoine, Raybaut Myriam   +10 more
doaj   +1 more source

Field tests of the mobile lidar for tropospheric ozone sensing on horizontal (inclined) and vertical paths [PDF]

E3S Web of Conferences
The results of field tests of the mobile lidar for ozone sensing on horizontal (inclined) and vertical paths are presented. The lidar operates on the basis of the differential absorption and scattering method at wavelengths of 299/341 nm and allows ...
Nevzorov Alexey, Tuzhilkin Dmitry, Nevzorov Aleksey   +2 more
doaj   +1 more source

Accuracy Evaluation of Differential Absorption Lidar for Ozone Detection and Intercomparisons with Other Instruments

Remote Sensing
Differential absorption lidar is an advanced tool for investigating tropospheric ozone transport and development. High-quality differential absorption lidar data are the basis for studying the temporal and spatial evolution of ozone pollution.
Guangqiang Fan, Bowen Zhang, Tianshu Zhang, Yibin Fu, Chenglei Pei, Shengrong Lou, Xiaobing Li, Zhenyi Chen, Wenqing Liu   +8 more
doaj   +1 more source

Estimation of background gas concentration from differential absorption lidar measurements [PDF]

Atmospheric Measurement Techniques, 2016
Approaches are considered to estimate the background concentration level of a target species in the atmosphere from an analysis of the measured data provided by the National Physical Laboratory's differential absorption lidar (DIAL) system.
P. Harris, N. Smith, V. Livina, T. Gardiner, R. Robinson, F. Innocenti   +5 more
doaj   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Performance of Charm-F – the airborne demonstrator for Merlin

EPJ Web of Conferences, 2018
In 2015, the new airborne lidar CHARM-F for the measurement of the greenhouse gases carbon dioxide and methane was set into operation. It is an integrated path differential absorption (IPDA) lidar designed for the use onboard the German research aircraft
Amediek Axel, Ehret Gerhard, Fix Andreas, Wirth Martin, Büdenbender Christian, Quatrevalet Mathieu, Kiemle Christoph   +6 more
doaj   +1 more source

Silicon‐Embedded Multifunctional Heterogeneous Integration for Miniaturized Photoplethysmography Detection Devices

Advanced Science, EarlyView.
ABSTRACT The multifunctional integration of chips with high flexibility and scalable manufacturing is crucial for enhancing chip performance, reducing chip size, and simplifying chip design. However, balancing volume, cost, flexibility, and functionality using traditional heterogeneous integration methods is challenging.
Lang Chen, Shizun Hu, Zhou Yang, Shitao Shen, Pan Zhang, Han Xu, Chi Zhang, Wei Wang   +7 more
wiley   +1 more source