The local concentration of ionospheric plasma on the basis of data obtained through various methods on the satellite Intercosmos 19

The measurements were made with the aid of an ionospheric sounding station, two spherical ion traps, a Langmuir probe, and a device (the KM-3) which, in addition to measuring the electron temperature through high-frequency sounding, makes it possible to determine the concentration of electrons from measurements of their velocity distribution. With vivid tracks, it is possible to measure the electron concentration near the satellite (out to about 5-8 km) on the basis of data from ionograms. In view of the measurement error of the Langmuir probe - approximately 10 percent in measurements of the electron concentration - measurements of this concentration near the satellite by the Langmuir probe and the ionosonde will give the same results.