Results 31 to 40 of about 123,753 (301)

Advances in entomological laser radar

open access: yesThe Journal of Engineering, 2019
During the past decade, the authors have developed and applied optical remote sensing instrumentation for in situ remote surveillance and quantification of the aerofauna.
Mikkel Brydegaard, Samuel Jansson
doaj   +1 more source

Combining Radar and Optical Imagery to Map Oil Palm Plantations in Sumatra, Indonesia, Using the Google Earth Engine

open access: yesRemote Sensing, 2020
Monitoring the expansion of commodity crops in the tropics is crucial to safeguard forests for biodiversity and ecosystem services. Oil palm (Elaeis guineensis) is one such crop that is a major driver of deforestation in Southeast Asia.
Thuan Sarzynski   +3 more
doaj   +1 more source

Moving target detection based on velocity compensation methods in a coherent continuous wave lidar

open access: yesThe Journal of Engineering, 2019
Light Detection and Ranging (lidar) technology has been applied in military and civil areas and shows great potential. However, in coherent lidar detection, significant Doppler Effect and velocity uncertainty result a bad influence on moving target ...
Huixin Huang   +3 more
doaj   +1 more source

Cloud optical depth retrievals from the Aerosol Robotic Network (AERONET) cloud mode observations [PDF]

open access: yes, 2010
Cloud optical depth is one of the most poorly observed climate variables. The new “cloud mode” capability in the Aerosol Robotic Network (AERONET) will inexpensively yet dramatically increase cloud optical depth observations in both number and accuracy ...
Alexander Marshak   +45 more
core   +1 more source

Optical Butting of Plane Array Sensors for PA-LiDAR

open access: yesIEEE Access, 2021
In order to expand the field of view and improve the resolution, a method of optical butting was proposed for two plane array sensors using beam splitter prism in this paper.
Shuo Zhang   +3 more
doaj   +1 more source

Innovative methods of correlation and orbit determination for space debris [PDF]

open access: yes, 2009
We propose two algorithms to provide a full preliminary orbit of an Earth-orbiting object with a number of observations lower than the classical methods, such as those by Laplace and Gauss.
Farnocchia, D.   +3 more
core   +3 more sources

Investigations of the lower and middle atmosphere at the Arecibo Observatory and a description of the new VHF radar project [PDF]

open access: yes, 1986
The atmospheric science research at the Arecibo Observatory is performed by means of (active) radar methods and (passive) optical methods. The active methods utilize the 430 NHz radar, the S-band radar on 2380 MHz, and a recently constructed Very High ...
Hagen, J.   +3 more
core   +1 more source

Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications

open access: yesAdvanced Functional Materials, EarlyView.
Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi   +3 more
wiley   +1 more source

Investigation of a Camera-Based Contactless Pulse Oximeter with Time-Division Multiplex Illumination Applied on Piglets for Neonatological Applications

open access: yesBiosensors
(1) Objective: This study aims to lay a foundation for noncontact intensive care monitoring of premature babies. (2) Methods: Arterial oxygen saturation and heart rate were measured using a monochrome camera and time-division multiplex controlled ...
René Thull   +12 more
doaj   +1 more source

Selection of the key earth observation sensors and platforms focusing on applications for Polar Regions in the scope of Copernicus system 2020-2030 [PDF]

open access: yes, 2019
An optimal payload selection conducted in the frame of the H2020 ONION project (id 687490) is presented based on the ability to cover the observation needs of the Copernicus system in the time period 2020–2030.
Camps Carmona, Adriano José   +6 more
core   +2 more sources

Home - About - Disclaimer - Privacy