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Characteristics of fragmented aurora-like emissions (FAEs) observed on Svalbard
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-04)
This study analyses the observations of a new type of small-scale aurora-like feature, which is further referred to as fragmented aurora-like emission(s) (FAEs). An all-sky camera captured these FAEs on three separate occasions in 2015 and 2017 at the Kjell Henriksen Observatory near the arctic town of Longyearbyen, Svalbard, Norway. A total of 305 FAE candidates were identified. They seem to appear ...
Keeping track of samples in multidisciplinary fieldwork
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-10)
We here present methods, tools and results for efficiently collecting metadata and
tracking samples collected in the field. The samples and metadata were collected during
scientific cruises conducted by amongst others marine biologists, oceanographers,
geochemists and marine geologists in the Nansen Legacy project. It is here reported on
the successful development and implementation of a system ...
Observations of sunlit N2+ aurora at high altitudes during the RENU2 flight
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-24)
We present measurements of sunlit aurora during
the launch of the Rocket Experiment for Neutral Upwelling
2 (RENU2) on the 13 December 2015, 07:34 UTC. The in
situ auroral conditions coincide with those of sunlit aurora
and were characterised by the 391.4 and 427.8 nm N<sub>2</sub>
<sup>+</sup> emissions. A correlation between several auroral wavelengths, as
measured by a meridian-scanning ...
Evaluations of UAV-enabled FSO Communications in the Arctic
(Journal article; Tidsskriftartikkel, 2022-02-16)
This paper investigates the feasibility of using free space optics (FSO) for communication between multiple hovering unmanned aerial vehicles (UAVs) and a detection unit (DU) in the Arctic. The uniqueness that sets apart UAV-based FSO systems from conventional FSO systems is the dynamics of the system since location and inclination of the UAV changes over time due to wind load and UAV oscillations. ...
Conformal Transformation Analysis of Capacitive Wireless Charging
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-30)
This paper studies the capacitive coupling in a capacitive power transfer (CPT) system
designed for charging applications. It proposes mathematical models using the conformal transformation
for calculating air-gapped and underwater capacitance and verifies the proposed models using COMSOL
multiphysics and measurements. The measured results show that we can achieve nano-farad capacitance
ranges ...
TRACKING VOLUME CHANGE OF THE BULK COMMODITIES WITH INTERFEROMETRIC SAR
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023)
Bulk commodities are crucial to global economy and
modern society. Some commodities, such as grain, are
normally stored in cylindrical tanks. The height of the tank’s
roof may be correlated to the substance quantity inside the
tank, indicating that roof displacement may be associated
with the volume of the bulk commodities. Here we analyzed
the displacements derived from C-band Sentinel-1 data ...
Classification of Bulk Cargo Types Stored Openly at Ports Using CNN
(Chapter; Bokkapittel, 2023)
In this paper, we present a novel concept of tracking
cargoes at open ports using remote sensing images and
convolution neural network (CNN) to classify various
dry bulk commodities. The dataset used is prepared
using Sentinel-2 atmospherically corrected (Sentinel-2
L2A) images covering 12 spectral bands. There are total
4995 labeled and geo-referenced images for four different
cargoes-bauxite, ...
Classification of bulk cargo types stored openly at ports using CNN
(Chapter; Bokkapittel, 2023-10-20)
In this paper, we present a novel concept of tracking cargoes at open ports using remote sensing images and convolution neural network (CNN) to classify various dry bulk commodities. The dataset used is prepared using Sentinel-2 atmospherically corrected (Sentinel-2 L2A) images covering 12 spectral bands. There are total 4995 labeled and geo-referenced images for four different cargoes-bauxite, coal, ...