149.375MHz fm fsk 0313Z 08Aug17
COSMOS 2454 in a secret Russian military spacecraft believed to be Parus navigation satellite for the Russian Defense Ministry. Parus satellites circle Earth in 620-mile-high (1,000-km-high) orbits over the poles. The new Parus spacecraft will likely be renamed Kosmos 2454 when it joins Russia's military satellite fleet.
https://www.n2yo.com/satellite/?s=35635Description: A chain of five satellite receivers observes signals from the Russian Low Earth Orbit (LEO) satellites. Two signals transmitted coherently at frequencies 150 MHz and 400 MHz are received and their phase difference is used to calculate the ionospheric electron density by means of statistical inversion. The results are shown in terms of electron density plots in a vertical plane above the receiver chain. In an ideal case the satellite flies along the chain. If this is not the case, the plot is a projection from regions outside the vertical plane. In order to estimate the validity of the results, check the satellite path in each case.
http://www.sgo.fi/Data/Tomography/tomoDescr.php