Peer-Reviewed Publications

• “Visible Emission Line Coronagraph (VELC) on Board Aditya-L1”,  Singh, J., Ramesh, R., Raghavendra Prasad, B., Muthu Priyal, V., Sasikumar Raja, K., Venkata, S. N., Kamath, P. U., Natarajan, V., Pawankumar, S., Sanal Krishnan, V. U., Savarimuthu, P., Mishra, S., Kumar, V., Sumana, C., Bhavana Hegde, S., Utkarsha, D., Kumar, A., Nagabhushana, S., Kathiravan, S., Vemareddy, P., Kathiravan, C., Nagaraju, K., Ravindra, B., & Mishra, W. Solar Physics, 300(5), 66 (2025). https://doi.org/10.1007/s11207-025-02477-1.

• “Observations of Temporal Variations in the 5303 Å Emission Line During a Coronal Mass Ejection Without Any Associated Solar Flare”, Muthu Priyal, V., Ramesh, R., Singh, J., & Sasikumar Raja, K. . Astrophysical Journal, 983(2), 171 (2025). https://doi.org/10.3847/1538-4357/adbe73.

• “New Results on the Onset of a Coronal Mass Ejection from 5303 Å Emission Line Observations with VELC/ADITYA-L1”. 

Ramesh, R., Muthu Priyal, V., Singh, J., Sasikumar Raja, K., Savarimuthu, P., & Gavshinde, P. 

Astrophysical Journal Letters, 976, L6 (2024). https://doi.org/10.3847/2041-8213/ad8c45.

• "Calibration of Spectropolarimetry channel of Visible Emission Line Coronagraph onboard Aditya-L1"
  Venkata Suresh Narra, K. Sasikumar Raja, Raghavendra Prasad B., Jagdev Singh, Shalabh Mishra, Sanal Krishnan V. U., Bhavana Hegde S., Utkarsha D., Natarajan V., Pawan Kumar S., Muthu Priyal V., Savarimuthu P., Priya Gavshinde, Umesh Kamath P.
  arXiv e-prints, 2024. DOI: 10.48550/arXiv.2409.12793.

• "Low-Frequency Solar Radio Type II Bursts And Their Association With Space Weather Events During The Ascending Phase Of Solar Cycle 25"
  Theogene Ndacyayisenga, Jean Uwamahoro, Jean Claude Uwamahoro, Daniel Izuikedinachi Okoh, K. Sasikumar Raja, Akeem Babatunde Rabiu, Christian Kwisanga, Christian Monstein
  Annales Geophysicae, Volume 42, Pages 313-329, 2024. DOI: 10.5194/angeo-42-313-2024.

• "Data processing of visible emission line coronagraph onboard ADITYA-L1"
  Muthu Priyal, Jagdev Singh, Raghavendra Prasad B., Chavali Sumana, Varun Kumar, Shalabh Mishra, S. N. Venkata, G. Sindhuja, K. Sasikumar Raja, Amit Kumar, Sanal Krishnan V., Bhavana Hegde S., Utkarsha D., Natarajan Venkatasubramanian, Pawan Kumar Somasundram, S. Nagabhushana, Umesh Kamath P., S. Kathiravan, T. Vishnu Mani, Suresh Basavaraju, Rajkumar Chavan, P. Vemareddy, B. Ravindra, S. P. Rajaguru, K. Nagaraju, Wageesh Mishra, Jayant Joshi, Tanmoy Samanta, Piyali Chatterjee, C. Kathiravan, R. Ramesh
  Advances in Space Research, Volume 74, Pages 547-560, 2024. DOI: 10.1016/j.asr.2024.03.058.

• "An Assessment of Solar Cycle 25 Progress Through Observation of SRBs and Associated Geomagnetic Storms"
  Theogene Ndacyayisenga, Jean Uwamahoro, K. Sasikumar Raja, Jean Claude Uwamahoro, Christian Kwisanga, Christian Monstein
  Advances in Space Research, Volume 73, Pages 6274-6287, 2024. DOI: 10.1016/j.asr.2024.03.006.

• "Calibration of VELC Detectors Onboard Aditya-L1 Mission"

Shalabh Mishra, K. Sasikumar Raja, V. U. Sanal Krishnan, Venkata Suresh Narra, Bhavana Hegde S., Utkarsha D., Muthu Priyal V., Pawan Kumar S., Natarajan V., Raghavendra Prasad B., Jagdev Singh, Umesh Kamath P., S. Kathiravan, T. Vishnu, Suresha P. Savarimuthu, Jalshri H. Desai, Rajiv Kumaran, Shiv Sagar, Sumit Kumar, Inderjeet Singh Bamrah, Amit Kumar, Experimental Astronomy, Volume 57, Article 7, 2024. DOI: 10.1007/s10686-024-09922-2.

• "Ground Calibration of Visible Emission Line Coronagraph Onboard Aditya-L1 Mission"
  Raghavendra Prasad Budihal, Venkata Suresh Narra, Natarajan Venkatasubramanyam, Pawan Kumar Somasundaram, Umesh Kamath Padavu, Shalabh Mishra, Bhavana Hegde, Kantepalli Sasikumar Raja, Jagdev Singh
  Journal of Astronomical Telescopes, Instruments, and Systems, Volume 9, Article 044001, 2023. DOI: 10.1117/1.JATIS.9.4.044001.

• "Eruption of the EUV Hot Channel from the Solar Limb and Associated Moving Type IV Radio Burst"
  P. Vemareddy, P. Démoulin, K. Sasikumar Raja, J. Zhang, N. Gopalswamy, N. Vasantharaju
  The Astrophysical Journal, Volume 927, Article 108, 2022. DOI: 10.3847/1538-4357/ac4dfe.

• "NenuFAR Performance for Solar Radio Observations"
  C. Briand, B. Cecconi, N. Chrysaphi, J. N. Girard, J. -M. Grießmeier, K. Hariharan, A. Loh, P. Murphy, K. Sasikumar Raja, P. Zarka, P. Zhang
  URSI Radio Science Letters, Volume 4, Article 17, 2022. DOI: 10.46620/22-0017.

• "Spectral Analysis of Solar Radio Type III Bursts from 20 kHz to 410 MHz"
  K. Sasikumar Raja, Milan Maksimovic, Eduard P. Kontar, Xavier Bonnin, Philippe Zarka, Laurent Lamy, Hamish Reid, Nicole Vilmer, Alain Lecacheux, Vratislav Krupar, Baptiste Cecconi, Lahmiti Nora, Laurent Denis, The Astrophysical Journal, Volume 924, Article 58, 2022. DOI: 10.3847/1538-4357/ac34ed. 

• "Solar Coronal Magnetic Fields and Sensitivity Requirements for Spectropolarimetry Channel of VELC Onboard Aditya-L1"
  K. Sasikumar Raja, Suresh Venkata, Jagdev Singh, B. Raghavendra Prasad
  Advances in Space Research, Volume 69, Pages 814-822, 2022. DOI: 10.1016/j.asr.2021.10.053.

• "Observations of Shock Propagation through Turbulent Plasma in the Solar Corona"
  Eoin P. Carley, Baptiste Cecconi, Hamish A. Reid, Carine Briand, K. Sasikumar Raja, Sophie Masson, Vladimir Dorovskyy, Caterina Tiburzi, Nicole Vilmer, Pietro Zucca, Philippe Zarka, Michel Tagger, Jean-Mathias Grie{\ss}meier, Stéphane Corbel, Gilles Theureau, Alan Loh, Julien N. Girard
  The Astrophysical Journal, Volume 921, Article 3, 2021. DOI: 10.3847/1538-4357/ac1acd.

• "Trends and Characteristics of High-Frequency Type II Bursts Detected by CALLISTO Spectrometers"
  A.C. Umuhire, J. Uwamahoro, K. Sasikumar Raja, A. Kumari, C. Monstein
  Advances in Space Research, 2021. DOI: 10.1016/j.asr.2021.06.029.

• "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, Kushagra Upadhyay, Divya Oberoi, K. Sasikumar Raja, Christian Monstein
  Solar Physics, 2021. DOI: 10.1007/s11207-021-01820-6.

• "Turbulent Proton Heating Rate in the Solar Wind from 5 to 45 R☉"
  K. Sasikumar Raja, Prasad Subramanian, Madhusudhan Ingale, R. Ramesh, Milan Maksimovic
  The Astrophysical Journal, 914:137 (8pp), June 20, 2021. DOI: 10.3847/1538-4357/abfcd1.

• "A Statistical Study of Solar Radio Bursts and Space Weather Implications"
  Ndacyayisenga Theogene, Jean Uwamahoro, K. Sasikumar Raja, Christian Monstein
  Advances in Space Research, 67, 4, 1425-1435, 2021. DOI: 10.1016/j.asr.2020.11.022.

• "A Statistical Study of Low-Frequency Solar Radio Type III Bursts"
  Mahender Arrori, K. Sasikumar Raja, R. Ramesh, Vemareddy Panditi, Christian Monstein, Ganji Yellaiah
  Solar Physics, 295, 11, 153, 2020. DOI: 10.1007/s11207-020-01722-z.

• "Global Solar Magnetic-Field and Interplanetary Scintillations During the Past Four Solar Cycles"
  K. Sasikumar Raja, P. Janardhan, Madhusudhan Ingale, Susanta Kumar Bisoi, Prasad Subramanian, K. Fujiki, Milan Maksimovic
  Solar Physics, 294:123, 2019. DOI: 10.1007/s11207-019-1514-7.

• "Automated Detection of Solar Radio Bursts Using a Statistical Method"
  Dayal Singh, K. Sasikumar Raja, Prasad Subramanian, R. Ramesh, Christian Monstein
  Solar Physics, 294:112, 2019. DOI: 10.1007/s11207-019-1500-0.

• "Dissipation Scale Lengths of Density Turbulence in the Inner Solar Wind"
  K. Sasikumar Raja, Prasad Subramanian, Madhusudhan Ingale, R. Ramesh
  The Astrophysical Journal, 872:77, 2019. DOI: 10.3847/1538-4357/aafd33.

• "Turbulent Density Fluctuations and Proton Heating Rate in the Solar Wind from 9–20 R☉"
  K. Sasikumar Raja, Prasad Subramanian, R. Ramesh, Angelos Vourlidas, Madhusudhan Ingale
  The Astrophysical Journal, 850:129, 2017. DOI: 10.3847/1538-4357/aa94cd.

• "Amplitude of Solar Wind Density Turbulence from 10–45 R☉"
  K. Sasikumar Raja, Madhusudhan Ingale, R. Ramesh, Prasad Subramanian, P. K. Manoharan, P. Janardhan
  The Journal of Geophysical Research: Space Physics, 121:11605, 2016. DOI: 10.1002/2016JA023254.

• "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, C. Kathiravan, T. J. Wang
  The Astrophysical Journal, 796, 2014. DOI: 10.1088/0004-637X/796/1/56.

• "Low-Frequency Observations of Transient Quasi-Periodic Radio Emission from the Solar Atmosphere"
  K. Sasikumar Raja, R. Ramesh
  The Astrophysical Journal, 775, 2013. DOI: 10.1088/0004-637X/775/1/38.

• "Design and Performance of a Low-Frequency Cross-Polarized Log-Periodic Dipole Antenna"
  K. Sasikumar Raja, C. Kathiravan, R. Ramesh, M. Rajalingam, Indrajit V. Barve
  The Astrophysical Journal Supplement Series, 207, 2013. DOI: 10.1088/0067-0049/207/1/2.

• "Low-Frequency Radio Observations of Picoflare Category Energy Releases in the Solar Atmosphere"
  R. Ramesh, K. Sasikumar Raja, C. Kathiravan, A. Satya Narayanan
  The Astrophysical Journal, 762, 2013. DOI: 10.1088/0004-637X/762/2/89.

ArXiv Preprints

• "pyCallisto: A Python Library To Process The CALLISTO Spectrometer Data"
  Ravindra Pawase, K. Sasikumar Raja
  ArXiv, 2020. DOI: 2020arXiv200616300P.

• "Clearing Certain Misconceptions in the Common Explanations of Aerodynamic Lift"
  Navinder Singh, K. Sasikumar Raja, P. Janardhan
  ArXiv, 2019. DOI: 2018arXiv181011461S.

• "CALLISTO Spectrometer at IISER-Pune"
  K. Sasikumar Raja, Prasad Subramanian, S. Ananthakrishnan, Christian Monstein
  ArXiv, 2017. DOI: 2018arXiv180103547S.

Conference Proceedings

• "Solar Type II Radio Bursts and Associated CME Speeds"
  Manoj Praveen G, K. Sasikumar Raja, Prasad Subramanian, Christian Monstein
  Presented at Kerala Science Congress, India, January 28-30, 2018.