Results 51 to 60 of about 6,939,496 (164)

Vision-Based Autonomous Landing of a Quadrotor on the Perturbed Deck of an Unmanned Surface Vehicle

Drones, 2018
Autonomous landing on the deck of an unmanned surface vehicle (USV) is still a major challenge for unmanned aerial vehicles (UAVs). In this paper, a fiducial marker is located on the platform so as to facilitate the task since it is possible to retrieve ...
Riccardo Polvara, Sanjay Sharma, Jian Wan, Andrew Manning, Robert Sutton   +4 more
doaj   +1 more source

Fiducial Reference Measurements for SST and sea-ice

This talk was given at the 25th International SST Users’ Symposium and GHRSST Science Team Meeting (GHRSST25) held in Montreal, Canada/Online from 10 – 14 June 2024. Explore the full program at GHRSST25 on the GHRSST Website here. Abstract Fiducial Reference Measurements (FRM) are high-quality, calibrated and SI-traceable reference in situ ...
O'Carroll, Anne, Lucas, Marc, Dybkjær, Gorm, David, Arnaud, Le Menn, Marc, Desprez de Gesincourt, Oliver, Høyer, Jacob, Corlett, Gary, Tomazic, Igor   +8 more
openaire   +1 more source

Comparison of Above-Water Seabird and TriOS Radiometers along an Atlantic Meridional Transect

Remote Sensing, 2020
The Fiducial Reference Measurements for Satellite Ocean Color (FRM4SOC) project has carried out a range of activities to evaluate and improve the state-of-the-art in ocean color radiometry.
Krista Alikas, Viktor Vabson, Ilmar Ansko, Gavin H. Tilstone, Giorgio Dall’Olmo, Francesco Nencioli, Riho Vendt, Craig Donlon, Tania Casal   +8 more
doaj   +1 more source

Etn@ref: a geodetic reference frame for Mt. Etna GPS networks

Annals of Geophysics, 2010
In volcanology, geodetic data are one of the most important instruments for the scientific community interested in modeling physical processes related to magma movements in the shallow crust.
Giuseppe Siligato, Mario Pulvirenti, Daniele Pellegrino, Marco Aloisi, Valentina Bruno, Flavio Cannavò, Massimo Rossi, Mimmo Palano, Mario Mattia   +8 more
doaj   +1 more source

On the use of fractional calculus to improve the pulse arrival time (PAT) detection when using photoplethysmography (PPG) and electrocardiography (ECG) signals.

PLoS ONE
The pulse arrival time (PAT) has been considered a surrogate measure for pulse wave velocity (PWV), although some studies have noted that this parameter is not accurate enough.
Mahtab Mohammadpoor Faskhodi, Miguel A Garcia-Gonzalez, Mireya Fernandez-Chimeno, Federico Guede-Fernández, Marc Mateu-Mateus, Lluis Capdevila, Juan J Ramos-Castro   +6 more
doaj   +1 more source

Complete characterization of ocean color radiometers

Frontiers in Remote Sensing
Verifying and validating waterleaving radiance measurements from space for an accurate derivation of Ocean/Water Colour biogeophysical products is based on concurrent high-quality fiducial reference measurements (FRM) carried out on the ground or water ...
Viktor Vabson, Ilmar Ansko, Kim Duong, Riho Vendt, Joel Kuusk, Kevin Ruddick, Agnieszka Bialek, Gavin H. Tilstone, Juan Ignacio Gossn, Ewa Kwiatkowska   +9 more
doaj   +1 more source

Absolute Calibration of the European Sentinel-3A Surface Topography Mission over the Permanent Facility for Altimetry Calibration in west Crete, Greece

Remote Sensing, 2018
This work presents calibration results for the altimeter of Sentinel-3A Surface Topography Mission as determined at the Permanent Facility for Altimetry Calibration in west Crete, Greece. The facility has been providing calibration services for more than
Stelios Mertikas, Craig Donlon, Pierre Féménias, Constantin Mavrocordatos, Demitris Galanakis, Achilles Tripolitsiotis, Xenophon Frantzis, Costas Kokolakis, Ilias N. Tziavos, George Vergos, Thierry Guinle   +10 more
doaj   +1 more source

Generating hyperspectral reference measurements for surface reflectance from the LANDHYPERNET and WATERHYPERNET networks

Frontiers in Remote Sensing
The LANDHYPERNET and WATERHYPERNET networks (which together make up the HYPERNETS network) consist of a set of autonomous hyperspectral spectroradiometers (HYPSTAR®) acquiring fiducial reference measurements of surface reflectance at various sites ...
Pieter De Vis, Clemence Goyens, Samuel Hunt, Quinten Vanhellemont, Kevin Ruddick, Agnieszka Bialek   +5 more
doaj   +1 more source

Field Intercomparison of Radiometers Used for Satellite Validation in the 400–900 nm Range

Remote Sensing, 2019
An intercomparison of radiance and irradiance ocean color radiometers (the second laboratory comparison exercise—LCE-2) was organized within the frame of the European Space Agency funded project Fiducial Reference Measurements for Satellite Ocean Color ...
Viktor Vabson, Joel Kuusk, Ilmar Ansko, Riho Vendt, Krista Alikas, Kevin Ruddick, Ave Ansper, Mariano Bresciani, Henning Burmester, Maycira Costa, Davide D’Alimonte, Giorgio Dall’Olmo, Bahaiddin Damiri, Tilman Dinter, Claudia Giardino, Kersti Kangro, Martin Ligi, Birgot Paavel, Gavin Tilstone, Ronnie Van Dommelen, Sonja Wiegmann, Astrid Bracher, Craig Donlon, Tânia Casal   +23 more
doaj   +1 more source

Radiometric field inter-comparison of fiducial reference measurements using an open source community processor

Optics Express
A radiometric field intercomparison was conducted at the Acqua Alta Oceanographic Tower (AAOT) in the Adriatic Sea from 14 to 21 July 2022 to assess differences in the accuracy of above-water radiometer systems (Sea-Bird HyperSAS, pySAS, TriOS-RAMSES) processed using an open-source community processor (HyperCP).
Gavin H. Tilstone, Thomas M. Jordan, Dirk Aurin, Agnieszka Białek, Alexis Deru, Ashley Ramsay, Martin Hieronymi, Giorgio Dall’Olmo, Martin Ligi, Charles Kovach, Ilmar Ansko, Michael Ondrusek, Viktor Vabson, Giuseppe Zibordi, Juan Ignacio Gossn, Ewa Kwiatkowska, Riho Vendt   +16 more
openaire   +2 more sources