Steinar Midtskogen
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View article: Corrigendum: Multi-instrument observations of the Pajala fireball: Origin, characteristics, and atmospheric implications
Corrigendum: Multi-instrument observations of the Pajala fireball: Origin, characteristics, and atmospheric implications Open
Corrigendum on: Vierinen J, Aslaksen T, Chau JL, Gritsevich M, Gustavsson B, Kastinen D, Kero J, Kozlovsky A, Kvaerna T, Midtskogen S, Näsholm SP, Ulich T, Vegum K and Lester M (2022) Multi-instrument observations of the Pajala fireball: O…
View article: Multi-instrument observations of the Pajala fireball: Origin, characteristics, and atmospheric implications
Multi-instrument observations of the Pajala fireball: Origin, characteristics, and atmospheric implications Open
Meteor observations provide information about Solar System constituents and their influx onto Earth, their interaction processes in the atmosphere, as well as the neutral dynamics of the upper atmosphere. This study presents optical, radar…
View article: Pajala Fireball
Pajala Fireball Open
<p>Meteoroids entering the Earth's atmosphere are associated with a number of phenomena including ablation, ambipolar diffusion, plasma transport, chemical reactions, shock waves, and plasma turbulence. A bright daylight fireball obs…
View article: An Overview of Coding Tools in AV1: the First Video Codec from the Alliance for Open Media
An Overview of Coding Tools in AV1: the First Video Codec from the Alliance for Open Media Open
In 2018, the Alliance for Open Media (AOMedia) finalized its first video compression format AV1, which is jointly developed by the industry consortium of leading video technology companies.The main goal of AV1 is to provide an open source …
View article: The Av1 Constrained Directional Enhancement Filter (Cdef)
The Av1 Constrained Directional Enhancement Filter (Cdef) Open
This paper presents the constrained directional enhancement filter designed for the AV1 royalty-free video codec. The in-loop filter is based on a non-linear low-pass filter and is designed for vectorization efficiency. It takes into accou…