47 citations · 197 across the 15 of their papers we have counts for
15 papers
Data processing of Visible Emission Line Coronagraph Onboard ADITYA L1
Muthu Priyal, Jagdev Singh, B. Raghavendra Prasad +28
ADITYA-L1 is India's first dedicated mission to observe the sun and its atmosphere from a halo orbit around L1 point. Visible emission line coronagraph (VELC) is the prime payload…
Preparing for Solar and Heliospheric Science with the SKAO: An Indian Perspective
Divya Oberoi, Susanta Kumar Bisoi, K. Sasikumar Raja +4
The Square Kilometre Array Observatory (SKAO) is perhaps the most ambitious radio telescope envisaged yet. It will enable unprecedented studies of the Sun, the corona and the helio…
Eruption of EUV Hot-Channel near Solar Limb and Associated Moving Type-IV Radio Burst
P. Vemareddy, P. Démoulin, K. Sasikumar Raja +3
Using the observations from Solar Dynamics Observatory, we study an eruption of a hot-channel flux rope (FR) near the solar-limb on February 9, 2015. The pre-eruptive structure is…
Solar Coronal Magnetic Fields and Sensitivity Requirements for Spectropolarimetry Channel of VELC Onboard Aditya-L1
K. Sasikumar Raja, Suresh Venkata, Jagdev Singh +1
Understanding solar coronal magnetic fields is crucial to address the long-standing mysteries of the solar corona and solar wind. Although routine photospheric magnetic fields (MFs…
Observations of shock propagation through turbulent plasma in the solar corona
Eoin P. Carley, Baptiste Cecconi, Hamish A. Reid +14
Eruptive activity in the solar corona can often lead to the propagation of shock waves. In the radio domain the primary signature of such shocks are type II radio bursts, observed…
Trends and Characteristics of High-Frequency Type II Bursts Detected by CALLISTO Spectrometers
A. C. Umuhire, J. Uwamahoro, K. Sasikumar Raja +22
Solar radio type II bursts serve as early indicators of incoming geo-effective space weather events such as coronal mass ejections (CMEs). In order to investigate the origin of hig…
Two-stage evolution of an extended C-class eruptive flaring activity from sigmoid active region NOAA 12734: SDO and Udaipur-CALLISTO observations
Bhuwan Joshi, Prabir K. Mitra, R. Bhattacharyya +4
We present a multi-wavelength investigation of a C-class flaring activity that occurred in the active region NOAA 12734 on 8 March 2019. The investigation utilises data from AIA an…
A Statistical Study of Solar Radio Type III Bursts and Space Weather Implication
Theogene Ndacyayisenga, Jean Uwamahoro, K. Sasikumar Raja +1
Solar radio bursts (SRBs) are the signatures of various phenomena that happen in the solar corona and interplanetary medium (IPM). In this article, we have studied the occurrence o…
A Statistical Study of Low-frequency Solar Radio Type-III Bursts
Mahender Aroori, K. Sasikumar Raja, R. Ramesh +3
We have studied low-frequency (45 - 410 MHz) type III solar radio bursts observed using the e-CALLISTO spectrometer located at Gauribidanur radio observatory, India during 2013 - 2…
pyCallisto: A Python Library To Process The CALLISTO Spectrometer Data
Ravindra Pawase, K. Sasikumar Raja
CALLISTO is a radio spectrometer designed to monitor the transient radio emissions/bursts originated from the solar corona in the frequency range MHz. At present, there ar…
Clearing certain misconception in the common explanations of the aerodynamic lift
Navinder Singh, Navinder Singh Bathinda, K. Sasikumar Raja +1
Air travel has become one of the most common means of transportation. The most common question which is generally asked is: How does an airplane gain lift? And the most common answ…
CALLISTO Spectrometer at IISER-Pune
K. Sasikumar Raja, Prasad Subramanian, S. Ananthakrishnan +1
A CALLISTO spectrometer to monitor solar radio transient emissions from (above photosphere) is installed at IISER, Pune, India (longitude $73^{\circ} 55…
Design and performance of a low frequency cross-polarized log-periodic dipole antenna
K. Sasikumar Raja, C. Kathiravan, R. Ramesh +2
We report the design and performance of a cross-polarized log-periodic dipole (CLPD) antenna for observations of polarized radio emission from the solar corona at low frequencies.…
An estimate of the magnetic field strength associated with a solar coronal mass ejection from low frequency radio observations
K. Sasikumar Raja, R. Ramesh, K. Hariharan +2
We report ground based, low frequency heliograph (80 MHz), spectral (85-35 MHz) and polarimeter (80 and 40 MHz) observations of drifting, non-thermal radio continuum associated wit…
Amplitude of solar wind density turbulence from 10--45
K. Sasikumar Raja, Madhusudan Ingale, R. Ramesh +3
We report on the amplitude of the density turbulence spectrum () and the density modulation index () in the solar wind between and . We derive t…