@g7izu
Aa described, the news is improbabile: a "distant" satellite cannot simply orbit over baltic regions alone: or it' s distant (geostationary) and thus vertically over equator at 36000 km, or it is someway "nearer" having a orbit continuosly changing day by day or hour by hour, hundred or thousands km from any part of the earth. Intermittent emissions are coherent only with low orbits or voluntary jamming.
@Davide_Sandini With respect, it's probably best to listen to the podcast before criticizing. In my post I was directly quoting the summary provided on the podcast page, which actually says "a distantly orbiting satellite somewhere over the Baltic Sea". It does not specifically state what it is orbiting around, although we all know that satellites tend to orbit the Earth or whatever object to which they are gravitationally bound.
Non-geostationary Molniya-orbit satellites were also mentioned in the podcast which orbit the Earth with high points above the Arctic regions. The Baltic is at the forefront of GPS interference stories due to deliberate interference caused by Russian assets in the region.
The podcast describes detailed analysis of data sourced from widely positioned ground-based (fixed) GPS receivers that suffer occasional and brief bursts of interference, which interrupts reception of the weak GPS signals on the L1 GPS frequency. Diligent research has narrowed the source of interference to a few candidate satellites thought to be in geostationary orbit in the vicinity of Europe. The interference may be unintentional.
