Results 21 to 30 of about 62,511 (247)

Mapping ionospheric backscatter measured by the SuperDARN HF radars - part 2: Assessing SuperDARN virtual height models [PDF]

open access: yes, 2008
The Super Dual Auroral Radar Network (SuperDARN) network of HF coherent backscatter radars form a unique global diagnostic of large-scale ionospheric and magnetospheric dynamics in the northern and southern hemispheres.
T. R. Robinson (7590257)   +24 more
core   +2 more sources

Multi-frequency HF radar measurements of artificial F-region field-aligned irregularities [PDF]

open access: yes, 2004
International audienceWe present radar backscatter power measurements using the CUTLASS HF radar at Hankasalmi, Finland from F-region field-aligned irregularities induced by HF radio pumping with the EISCAT Heating facility.
A. Senior   +15 more
core   +2 more sources

Frequency-Spectra-Based High Coding Capacity Chipless RFID Using an UWB-IR Approach

open access: yesSensors, 2021
A novel methodology is proposed to reliably predict the resonant characteristics of a multipatch backscatter-based radio frequency identification (RFID) chipless tag.
Kawther Mekki   +4 more
doaj   +1 more source

D region HF radar echoes associated with energetic particle precipitation and pulsating aurora [PDF]

open access: yes, 2008
Milan et al. (2001) identified a class of narrow, slow-moving HF radar backscatter echoes which originate between altitudes of 80 and 100 km, the ionospheric D- and lower E-regions.
Milan, S.E.   +11 more
core   +2 more sources

Investigating the Influence of the Physiological Environment on Quantitative Contrast-enhanced Ultrasound Imaging

open access: yesJournal of Medical Ultrasound, 2014
Ultrasound Doppler studies have long been used for quantifying blood flow velocity, and microbubble contrast agents can be used to amplify the Doppler signal.
Ipshita Gupta
doaj   +1 more source

Towards Including Dynamic Vegetation Parameters in the EUMETSAT H SAF ASCAT Soil Moisture Products

open access: yesRemote Sensing, 2021
The TU Wien Soil Moisture Retrieval (TUW SMR) approach is used to produce several operational soil moisture products from the Advanced Scatterometer (ASCAT) on the Metop series of satellites as part of the EUMETSAT Satellite Application Facility on ...
Susan C. Steele-Dunne   +3 more
doaj   +1 more source

High resolution observations of spectral width features associated with ULF wave signatures in artificial HF radar backscatter [PDF]

open access: yes, 2004
International audienceThe EISCAT high power heating facility at Tromsø, northern Norway, has been utilised to generate artificial radar backscatter in the fields of view of the CUTLASS HF radars.
Woodfield, E.E.   +30 more
core   +2 more sources

Calibration of laser scanning intensity data using brightness targets

open access: yesGeodesy and Cartography, 2012
The paper examines a radiometric calibration method used at the Finnish Geodetic Institute (FGI). The brightness calibration targets and calibration scheme of airborne laser scanner intensity data is observed. For calibrating laser scanner intensity data,
Ants Vain   +3 more
doaj   +1 more source

Mapping Tropical Forest Biomass by Combining ALOS-2, Landsat 8, and Field Plots Data

open access: yesLand, 2016
This research was carried out in a dense tropical forest region with the objective of improving the biomass estimates by a combination of ALOS-2 SAR, Landsat 8 optical, and field plots data.
Luong Viet Nguyen   +6 more
doaj   +1 more source

Identifying community-driven priority questions in acoustic backscatter research

open access: yesFrontiers in Remote Sensing
IntroductionRemotely-sensed acoustic backscatter is an indispensable tool for seabed mapping, among other disciplines. Almost a decade after the GeoHab Backscatter Working Group published its guidelines and recommendations report, new technologies, new ...
Vincent Lecours   +8 more
doaj   +1 more source

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