Results 1 to 10 of about 123,753 (301)

Radar and optical leonids [PDF]

open access: yesAtmospheric Chemistry and Physics, 2004
We present joint optical-radar observations of meteors collected near the peak of the Leonid activity in 2002. We show four examples of joint detections with a large, phased array L-band radar and with intensified video cameras.
N. Brosch   +4 more
doaj   +10 more sources

Radar-Based Monitoring: A Proof of Principle Study in a Piglet Model for a Novel Approach in Non-Contact Vital Sign Monitoring [PDF]

open access: yesSensors
(1) Background: Hospitalized preterm infants often require months of vital signs monitoring in the neonatal intensive care unit. Today, wired sensors are essential for survival, but are associated with numerous disadvantages including sensor dislocations,
Sybelle Goedicke-Fritz   +12 more
doaj   +2 more sources

Radar target simulator with complex-valued delay line modeling based on standard radar components [PDF]

open access: yesAdvances in Radio Science, 2018
With increasing radar activities in the automotive, industrial and private sector, there is a need to test radar sensors in their environment. A radar target simulator can help testing radar systems repeatably.
A. R. Diewald, M. Steins, S. Müller
doaj   +1 more source

Cooperative radar with signature method for unambiguity [PDF]

open access: yesAdvances in Radio Science, 2019
The increasing availability of off-the-shelf high-frequency components makes radar measurement become popular in mainstream industrial applications. We present a cooperative FM radar for strongly reflective environments, being devised for a range of up ...
S. Müller, A. R. Diewald
doaj   +1 more source

Influence of a target’s inclination on LiDAR waveform and its application

open access: yesIET Optoelectronics, 2022
Inclination is one of the important parameters of a target’s surface, which is closely related to the waveform of light detection and ranging. When the target is tilted, the laser spot on the target’s surface changes greatly, and the influence of the ...
Tao Yang   +7 more
doaj   +1 more source

Dual-Band Transmitter and Receiver With Bowtie-Antenna in 0.13 μm SiGe BiCMOS for Gas Spectroscopy at 222 - 270 GHz

open access: yesIEEE Access, 2021
This paper presents a transmitter (TX) and a receiver (RX) with bowtie-antenna and silicon lens for gas spectroscopy at 222-270 GHz, which are fabricated in IHP’s $0.13~\mu \text{m}$ SiGe BiCMOS technology. The TX and RX use two integrated local
Klaus Schmalz   +7 more
doaj   +1 more source

Comprehensive signal processing approaches for non-contact heartbeat detection using 24 GHz FMCW radar [PDF]

open access: yesAdvances in Radio Science
Non-contact monitoring of vital signs has become increasingly important for enhancing patient comfort and reducing interference during medical assessments.
A. Marnach, V. Lücken, A. R. Diewald
doaj   +1 more source

Cloud optical thickness and effective particle radius derived from transmitted solar radiation measurements : Comparison with cloud radar observations [PDF]

open access: yes, 2006
A method is presented for determining the optical thickness and effective particle radius of stratiform clouds containing liquid water drops in the absence of drizzle from transmitted solar radiation measurements.
Kamei, Akihide   +6 more
core   +2 more sources

Concepts for a cost-efficient, additively manufactured WR90 coaxial waveguide transition [PDF]

open access: yesAdvances in Radio Science
This publication focuses on the production of low-cost prototypes of coaxial-waveguide transitions (CWTs) that achieve the performance level of industrial WR90 and WR187 CWTs.
M. Falk   +3 more
doaj   +1 more source

AUTOMATIC POLE DETECTION IN AERIAL AND SATELLITE IMAGERY FOR PRECISE IMAGE REGISTRATION WITH SAR GROUND CONTROL POINTS [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
The world-wide absolute geographic positioning accuracy of optical Satellite imagery is mostly about a few pixels of the image resolution. So for example WorldView-3 images have a CE90 of about 4 m.
T. Krauß, F. Kurz, H. Runge
doaj   +1 more source

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