Using the topside electron density (Ne) measurements recorded over Cyprus and Russia, we investigate latitudinal variation in during interval 2014–2020, encompassing a period of high-to-low solar activity. The selected dataset employed this study is based on situ Langmuir probe data board European Space Agency (ESA) Swarm satellites, vicinity three Digisonde stations Nicosia (35.14°N, 33.2°E), ...

A statistical analysis of two peaks (pre-midnight and post-midnight) occurrence in NmF2 daily variations was made on a latitudinal chain of four ionosonde stations in the Eurasian longitudinal sector. Overall 6182 cases of the ®rst and 5600 cases of the second peak occurrence were analyzed using all available foF2 observations for the years of solar maximum and minimum. Well-pronounced and syst...

We present a comparison of the observed behavior of the F-region ionosphere over Millstone Hill during the geomagnetically quiet and storm periods of 6±12 April 1990 with numerical model calculations from the IZMIRAN time-dependent mathematical model of the Earth's ionosphere and plasmasphere. The major enhancement to the IZMIRAN model developed in this study is the use of a new loss rate of O‡...

Abstract. The Ionospheric Photometer (IPM) is carried on the Feng Yun 3-D (FY3D) meteorological satellite, which allows for measurement of far-ultraviolet (FUV) airglow radiation in thermosphere. IPM a compact and high-sensitivity nadir-viewing FUV remote sensing instrument. It monitors 135.6 nm emission nightside thermosphere N2 Lyman–Birge–Hopfield (LBH) emissions dayside that can be used to ...

Abstract In this paper, the ionospheric quiet‐time disturbances otherwise known as Pre‐Magnetic Storm Signatures (PMS) have been studied using F2‐layer peak electron density (NmF2) data obtained from 12 Digisonde/ionosonde stations distributed across equatorial, low and mid‐latitudes. The datasets used spans years 2010–2012. Results study reveals strong PMS in NmF2 with percentage deviations (Δ...

In the present work neural network has been developed for prediction of Vertical Total Electron Content (VTEC) over Bhopal (23.2°N, 77.4°E & MLAT 14.2°N), an equatorial anomaly crest region. The study is based on VTEC data recorded by a multi-frequency multi-constellation GNSS receiver installed at during May 2016 to August 2017. Neural Network (NN) consists artificial neurons that are used lea...

ionospheric slab thickness is defined as the ratio of tec to maximum electron density of the f-region (nmf2), proportional to the square of the f2-layer critical frequency (fof2). it is an important parameter in that it is linearly correlated with scale height of the ionosphere, which is related to electron density profile. it also reflects variation of the neutral temperature. therefore, ionos...