J
J. Torppa
Researcher at Finnish Geodetic Institute
Publications - 5
Citations - 67
J. Torppa is an academic researcher from Finnish Geodetic Institute. The author has contributed to research in topics: Streak & Orbit determination. The author has an hindex of 2, co-authored 5 publications receiving 33 citations.
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Journal ArticleDOI
Streak detection and analysis pipeline for space-debris optical images
Jenni Virtanen,Jonne Poikonen,Tero Säntti,Tuomo Komulainen,J. Torppa,Mikael Granvik,Mikael Granvik,Karri Muinonen,Karri Muinonen,H. Pentikäinen,Julia Martikainen,Jyri Näränen,J. Lehti,Tim Flohrer +13 more
TL;DR: An automated streak detection and processing pipeline is developed and demonstrated its performance with an extensive database of semisynthetic images simulating streak observations both from ground-based and space-based observing platforms.
Journal ArticleDOI
Asteroid lightcurve inversion with Bayesian inference
TL;DR: In this article, a Markov-chain Monte Carlo sampler (MCMC) with a novel proposal probability density function based on the simulation of virtual observations giving rise to virtual least-squares solutions is presented.
Asteroid lightcurve inversion with Bayesian inference: Reference phase curves
K. Muinonen,J. Torppa,Xuan Wang,A. Cellino,J. Martikainen,O. Wilkman,M. Gritsevich,A. Penttilä +7 more
TL;DR: In this paper, the reference phase curve of an asteroid is estimated from the observations, to an extent allowed by a given data set, by extrapolation to equatorial illumination and observation of the given asteroid.
Streak detection and analysis pipeline for optical images
Jenni Virtanen,Mikael Granvik,J. Torppa,Karri Muinonen,Jonne Poikonen,J. Lehti,Tero Säntti,Tuomo Komulainen,Tim Flohrer +8 more
Journal ArticleDOI
Kolmiulotteisen muodon mallinnuksesta
TL;DR: In this article, perunan mukulan muoto on tärkeä geneettisesti määräytyvä lajikkeen ominaisuus, johon vaikuttavat myös ympäristötekijät.