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Venkat Ratnam
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Implementation of hybrid deep learning model (LSTM-CNN) for ionospheric TEC forecasting using GPS data
A Ruwali, AJS Kumar, KB Prakash, G Sivavaraprasad, DV Ratnam
IEEE Geoscience and Remote Sensing Letters 18 (6), 1004-1008, 2020
892020
A deep learning-based approach to forecast ionospheric delays for GPS signals
I Srivani, GSV Prasad, DV Ratnam
IEEE Geoscience and Remote Sensing Letters 16 (8), 1180-1184, 2019
872019
Modelling of low-latitude ionosphere using modified planar fit method for GAGAN
AD Sarma, DV Ratnam, DK Reddy
IET radar, sonar & navigation 3 (6), 609-619, 2009
562009
Development of multivariate ionospheric TEC forecasting algorithm using linear time series model and ARMA over low-latitude GNSS station
DV Ratnam, Y Otsuka, G Sivavaraprasad, JRKK Dabbakuti
Advances in Space Research 63 (9), 2848-2856, 2019
502019
Implementation of hybrid ionospheric TEC forecasting algorithm using PCA-NN method
IL Mallika, DV Ratnam, Y Ostuka, G Sivavaraprasad, S Raman
IEEE Journal of Selected Topics in Applied Earth Observations and Remote …, 2018
502018
Performance evaluation of ionospheric time delay forecasting models using GPS observations at a low-latitude station
G Sivavaraprasad, DV Ratnam
Advances in Space Research 60 (2), 475-490, 2017
412017
A cross layer cluster based routing approach for efficient multimedia data dissemination with improved reliability in VANETs
S Shafi, D Venkata Ratnam
Wireless Personal Communications 107 (4), 2173-2190, 2019
372019
Mitigation of ionospheric scintillation effects on GNSS signals using variational mode decomposition
G Sivavaraprasad, RS Padmaja, DV Ratnam
IEEE Geoscience and Remote Sensing Letters 14 (3), 389-393, 2017
372017
Modeling of low-latitude ionosphere using GPS data with SHF model
DV Ratnam, AD Sarma
IEEE transactions on Geoscience and Remote Sensing 50 (3), 972-980, 2011
352011
Performance evaluation of selected ionospheric delay models during geomagnetic storm conditions in low-latitude region
DV Ratnam, AD Sarma, VS Srinivas, P Sreelatha
Radio Science 46 (03), 1-6, 2011
342011
Signatures of equatorial plasma bubbles and ionospheric scintillations from magnetometer and GNSS observations in the Indian longitudes during the space weather events of early …
RK Vankadara, SK Panda, C Amory-Mazaudier, R Fleury, ...
Remote Sensing 14 (3), 652, 2022
312022
Machine learning algorithm to forecast ionospheric time delays using Global Navigation satellite system observations
L Mallika, DV Ratnam, S Raman, G Sivavaraprasad
Acta Astronautica 173, 221-231, 2020
292020
An efficient cross layer routing protocol for safety message dissemination in VANETS with reduced routing cost and delay using IEEE 802.11 p
S Shaik, D Venkata Ratnam, BN Bhandari
Wireless Personal Communications 100 (4), 1765-1774, 2018
272018
Modeling and analysis of GPS-TEC low latitude climatology during the 24th solar cycle using empirical orthogonal functions
JRKK Dabbakuti, DV Ratnam
Advances in Space Research 60 (8), 1751-1764, 2017
272017
Automatic ionospheric scintillation detector for global navigation satellite system receivers
DV Ratnam, G Sivavaraprasad, J Lee
IET Radar, Sonar & Navigation 9 (6), 702-711, 2015
272015
Ionospheric gradients estimation and analysis of S-band navigation signals for NAVIC system
DV Ratnam, TR Vishnu, PBS Harsha
IEEE Access 6, 66954-66962, 2018
262018
Detection of low-latitude ionospheric irregularities from GNSS observations
S Raghunath, DV Ratnam
IEEE Journal of Selected Topics in Applied Earth Observations and Remote …, 2015
262015
Analysis of ionosphere variability over low-latitude GNSS stations during 24th solar maximum period
DV Ratnam, G Sivavaraprasad, NL Devi
Advances in Space Research 60 (2), 419-434, 2016
242016
Improvement of Indian-regional Klobuchar ionospheric model parameters for single-frequency GNSS users
DV Ratnam, JRKK Dabbakuti, NS Lakshmi
IEEE Geoscience and Remote Sensing Letters 15 (7), 971-975, 2018
232018
TEC prediction model using neural networks over a low latitude GPS station
DV Ratnam, BV Dinesh, B Tejaswi, DP Kumar, TV Ritesh, ...
International Journal of Soft Computing and Engineering (IJDCE) 2, 517-521, 2012
232012
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