We present D region ionospheric response to 22 July 2009 total solar eclipse by modeling 19.8-kHz signal from NWC very low frequency (VLF) navigational transmitter located in the Australia. NWC VLF signal was received ...

Regular measurements of [OI] 630 nm nightglow have been carried out at Kolhapur (16.8◦N, 74.2◦E, dip lat 10.6◦N) in India with the help of tilting filter photometers during clear moonless nights. Several characteristic nightglow ...

We report an unusual event on absence of high frequency (HF) echoes in ionosonde observations from the ionospheric F2 region during the geomagnetic storm of 23–25 April 2023. This event was observed in both southern and ...

An advanced meteor radar, viz, Sri Venkateswara University (SVU) meteor radar (SVU MR) operating at 35.25 MHz, was installed at Sri Venkateswara University (SVU), Tirupati (13.63°N, 79.4°E), India, in August 2013 for ...

A CCD based all-sky imaging system was used to monitor various nightglow emissions (OI 630-nm, OI 557.7-nm, OI 777.4-nm, Na (589.3-nm) and hydroxyl (OH) airglow) at a low latitude station, Kolhapur (16.8°N, 74.2°E, dip lat ...

The ground-based all sky imager (ASI) is an advanced optical technique, capable of measuring the strong F-region nightglow in OI 630.0 nm emission from atomic oxygen. This emission is used to study the large-scale F-region ...

In electron-positron plasmas some of the plasma modes are decoupled due to the equal charge-to-mass ratio of both species. We derive the dispersion law for a low-frequency, generalized X-mode, which exists at all angles ...

An All-Sky Airglow Imager was operated at Silchar (24.68°N, 92.76°E), India from 9 to 11 December 2018, during a special observational campaign. We report the presence of two simultaneous mesospheric fronts observed in OH ...

South Atlantic Magnetic Anomaly (SAMA) due to its weak total geomagnetic field F is known to be a sink of trapped charged particles from the inner radiation belt during both magnetically quiet and disturbed periods. ...

It has been shown that the failure of the classical WKB approach in reproducing the correct frequency spectrum and spatial structures of field line resonances should be attributed to the inability of the method to provide ...