Phase-coded pulse aperiodic transmitter coding

II Virtanen, J Vierinen, MS Lehtinen - Annales Geophysicae, 2009 - angeo.copernicus.org
Both ionospheric and weather radar communities have already adopted the method of
transmitting radar pulses in an aperiodic manner when measuring moderately overspread …

Transmission code optimization method for incoherent scatter radar

J Vierinen, MS Lehtinen, M Orispää… - Annales …, 2008 - angeo.copernicus.org
When statistical inversion of a lag profile is used to determine an incoherent scatter target,
the posterior variance of the estimated target can be used to determine how well a set of …

Fast comparison of IS radar code sequences for lag profile inversion

MS Lehtinen, II Virtanen, J Vierinen - Annales geophysicae, 2008 - angeo.copernicus.org
A fast method for theoretically comparing the posteriori variances produced by different
phase code sequences in incoherent scatter radar (ISR) experiments is introduced …

Multi station-and interferometric radar meteor head echo observations

J Kero - 2014 XXXIth URSI General Assembly and Scientific …, 2014 - ieeexplore.ieee.org
We present highlights from meteor head echo observations with the tristatic EISCAT radar
system in the Fenno-Scandinavian arctic region and the interferometric middle and upper …

Amplitude domain analysis of strong range and Doppler spread radar echos

J Vierinen, MS Lehtinen, II Virtanen - Annales geophysicae, 2008 - angeo.copernicus.org
We present a novel method for analyzing range and Doppler spread targets in the amplitude
domain using linear statistical inversion. The result of the analysis is an estimate of the …

Advanced signal processing techniques with EISCAT3D

J Stamm - 2022 - munin.uit.no
A new, modern ionospheric radar, called EISCAT3D, is under construction in northern
Fennoscandia. In the first stage, the radar will have three sites, one combined …

[Књига][B] Theory and applications of sparsity for radar sensing of ionospheric plasma

R Volz - 2014 - search.proquest.com
In order to enable flexible high-resolution measurements of ionospheric plasma
phenomena, a sparsity-based radar waveform inversion technique is formulated and found …

[PDF][PDF] EISCAT_3D final report of work package 11

M Orispää, I Virtanen, M Lehtinen - 2014 - oulurepo.oulu.fi
Deliverable D11. 2 of Work Package 11 Software Theory and Implementation of the
European Commission 7th Framework Programme project EISCAT_3D: A European three …

Background suppression and strong phase codes in incoherent scatter lag profile inversion

II Virtanen - IEEE Geoscience and Remote Sensing Letters, 2014 - ieeexplore.ieee.org
High range resolution incoherent scatter spectra are routinely measured by means of
alternating codes and random codes. These radar transmission modulations are cycles of …

[PDF][PDF] Statistical analysis of incoherent scatter radar data

II Virtanen, J Vierinen, M Orispää, M Lehtinen - researchgate.net
The ionosphere is a partly ionised region of the atmosphere, extending from about 50 km to
above 1000 km altitude. Weak scattering of radio waves from thermal fluctuations in the …