The purpose of the present paper is to describe the observations of the variations in the
parameters of HF radio waves propagating through the ionosphere when the action of the …

Results obtained from observations of ionospheric disturbances over the People's Republic
of China during the course of the geospace storm of 14 May 2019, one of the largest storms …

We acquired measurements of four observable parameters of refracted signals received
from the ionosphere (Doppler shift, Doppler spectrum, number of rays, and signal amplitude) …

The Harbin Engineering University, the People's Republic of China, multifrequency multiple-
path coherent radio system operates continuously and provides data for post analysis. The …

Solar eclipses (SEs) pertain to high-energy sources. They are capable of causing significant
disturbances in all geoshells and geophysical fields. Despite the almost century-long history …

Doppler measurements at oblique propagation paths from the city of Harbin, the People's
Republic of China (PRC), to 10 high-frequency (HF) radio broadcast stations in the PRC …

A brief description of multi-frequency multipath passive radar dedicated to sounding the
ionosphere at oblique incidence is presented. Observations of variations caused by the …

We have made measurements of HF radio waves at the Harbin Engineering University, the
People's Republic of China, during the geospace storm of August 30-September 2, 2019 …

The observation of disturbances in the ionosphere during moderate (M≈ 5.9-6.6)
earthquakes of July 7, 2018, September 5 2018, and April 11, 2019 in Japan are described …

The paper deals with the effects that accompanied the Super Typhoon Kong-Rey action in
the ionosphere over the People's Republic of China (PRC). The observations were made …