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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
1102020
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
982019
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
602009
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
572018
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
562019
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
462017
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
442019
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
412022
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
402017
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
382011
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
382011
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
372020
A bidirectional long short-term memory-based ionospheric foF2 and hmF2 models for a single station in the low latitude region
TV Rao, M Sridhar, DV Ratnam, PBS Harsha, I Srivani
IEEE Geoscience and Remote Sensing Letters 19, 1-5, 2021
322021
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
302017
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
302016
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
282018
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
282015
A bidirectional deep-learning algorithm to forecast regional ionospheric TEC maps
K Sivakrishna, DV Ratnam, G Sivavaraprasad
IEEE Journal of Selected Topics in Applied Earth Observations and Remote …, 2022
272022
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
272015
A new ionospheric model for single frequency GNSS user applications using Klobuchar model driven by auto regressive moving average (SAKARMA) method over Indian region
IL Mallika, DV Ratnam, S Raman, G Sivavaraprasad
IEEE Access 8, 54535-54553, 2020
262020
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