INVERSION OF BACKSCATTER IONOGRAMS INTO QUASIPARABOLIC IONOSPHERIC LAYER PARAMETERS
Journal Title: Solar-Terrestrial Physics - Year 2020, Vol 6, Issue 3
Abstract
We present an inversion scheme of the backscatter signal leading edge into parameters of the quasi-parabolic electron density profile, which is based on the comparison of experimental and calculated minimum delays of scattered signals with corresponding distance to the skip zone border. Input parameters are frequency dependences of minimum group path of signal propagation, derived from processing and interpreting backscatter ionograms. For a fixed sounding frequency, the ionospheric parameter pair — the critical frequency and height of the F2-layer maximum — is defined as the intersection point of two curves representing solutions of minimization problems for discrepancy functionals of the minimum group path and the range to the skip zone border. Determining the ionospheric parameters by this inversion scheme on the sounding frequency grid allows us to construct a two-dimensional distribution of electron density in the direction of backscatter sounding.
Authors and Affiliations
Ponomarchuk S. N. , Penzin M. S.
Keywords
Related Articles
- EP ID EP700075
- DOI 10.12737/stp-63202009
- Views 133
- Downloads 0
Variations of ionospheric and geomagnetic field parameters during the June 18, 2013 Bachat earthquake
The paper presents the results of a study of variations in ionospheric parameters and local magnetic constant before, during, and after the Vachat earthquake, which occurred on June 18, 2013 at 23:02 UT (June 19, 2013 at...
COMPLEXES OF ACTIVITY ON THE SUN IN SOLAR CYCLE 21
The paper provides statistical data on solar activity complexes (ACs) observed in solar cycle 21. From the synoptic charts for the 1976–1986 sunspot activity, we have detected the regions where the sunspot generation was...
OPTICAL EFFECTS OF RUNNING SPACECRAFT ENGINES IN THE LOWER THERMOSPHERE
This paper provides a brief overview on optical effects during operation of spacecraft (SC) onboard engines in the lower thermosphere according to observational data from the ISTP SB RAS Geophyisical Observatory. We pres...
PROJECT OF THE LARGE SOLAR TELESCOPE WITH MIRROR 3 M IN DIAMETER
One of the most important problems of modern solar physics is the observation of the small-scale structure of the solar atmosphere at various heights (including the chromosphere and corona) in different spectral lines. S...
MICROWAVE INDICATOR OF POTENTIAL GEOEFFECTIVENESS AND MAGNETIC FLUX-ROPE STRUCTURE OF A SOLAR ACTIVE REGION
We analyze the presence of a microwave neutral-line-associated source (NLS) in a super-active region NOAA 12673, which produced a number of geo-effective events in September 2017. To estimate the NLS position, we use dat...