| 1 | ||
| Researcher: | Ratnam, Bharat | |
| Guide: | Pande, Savita | |
| University: | Jawaharlal Nehru University | |
| Language: | Hindi | |
| 2 | ||
| Researcher: | Kesametty, Venkata Ratnam | |
| Guide: | Shyama Sundar, B | |
| University: | Acharya Nagarjuna University | |
| Language: | English | |
| Shodhganga | ||
| 3 | Investigation and development of ionospheric time delay model using GPS and crabex signals | |
| Researcher: | Devanaboyina, V Ratnam | |
| Guide: | Sarma, A DRao, P V D Somasekhar | |
| University: | Jawaharlal Nehru Technological University | |
| Language: | English | |