Development of diagnostic capabilities of the Irkutsk incoherent scattering radar

A statistical study of internal gravity wave characteristics using the combined Irkutsk Incoherent Scatter Radar and Digisonde data

“…The DPS-4 ionosonde is located in Irkutsk. The Incoherent Scatter Radar (Potekhin et al, 2008) is 98 km northwestward of Irkutsk. In the mode of TID characteristics measurements, the radar performs scanning with a time step of 40 ms, alternatively in two directions, which allows almost simultaneous measurements of scattered signals height profiles by means of two oblique beams with integration time from 1 to 10 min.…”

“…Only with available representative statistics on TIDs propagation parameters, can we get steady-state data on wind velocity, which will allow comparison with models. The Institute of Solar-Terrestrial Physics has developed a unique complex of radio physical instruments for ionospheric research and a method for studying three-dimensional spatial-temporal structure of wave disturbances (Potekhin et al, 2008;Ratovsky et al, 2008;Medvedev et al, 2009). This method relies on data acquired by the DPS-4 ionosonde and the Irkutsk Incoherent Scatter Radar (IISR) that is able to scan in the meridional plane.…”

New opportunities offered by Cubesats for space research in Latin America: The SUCHAI project case

“…Variation of different plasma parameters lead to similar changes in the theoretical spectrum (Vallinkoski, 1988), making the resulting plasma parameters non-unique particularly if more than one ion species is present (Vallinkoski, 1988). A solution often implemented to solve this problem is to record raw signals, allowing the possibility of applying different off-line methods of analysis (Potekhin et al, 2008). Studies and analyzes related to the fitting process, or inversion process for plasma parameter estimation began in 1960s and have evolved from a table of possible cases to more automated optimized models where the error of the process can be also estimated (Ho and Moorcroft, 1971;Swartz, 1978;Holt et al, 1992;Cabrit and Kofman, 1997;Nikoukar et al, 2008;Shcherbakov et al, 2009;Bauer et al, 2013).…”

Calculation of meridional neutral winds in the middle latitudes from the Irkutsk incoherent scatter radar

“…If horizontal gradients of ionization, this factor leads to a distorted incoherent scatter signal spectrum, making it asymmetrical in a scan plane. In this case, the parameter Δ E is associated with a horizontal gradient of electron density ∂ N e /∂ x along the scan axis by the expression ∂ N e /∂ x = Δ E ⋅ N e /(2Δ F R ξ ), where Δ F is the half‐width of the incoherent scatter spectrum; R , a line of sight distance; ξ = 6.5 ⋅ 10 − 5 rad/kHz, the coefficient which reflects the dependence of the radar radiation pattern phase angle on the frequency for the IISR [ Potekhin et al , ]. This feature of the IISR may also result in regular contributions to the spectral asymmetry (through a noise component with an uneven frequency) by discrete cosmic radio sources, passing through a radiation pattern of the antenna.…”