IN2012DE00933AIN933DE2012AIN2012DE00933AIN 2012DE00933 AIN2012DE00933 AIN 2012DE00933AIN 933DE2012 AIN933DE2012 AIN 933DE2012AIN 2012DE00933 AIN2012DE00933 AIN 2012DE00933A
Authority
IN
India
Prior art keywords
satellite
board
antenna
water
torpedo
Prior art date
Application number
Inventor
Venkata Rangarajan Srinivasa
Chakraborti Debasish
Varughese Abraham
Satyanarayana Padmaja Kondethimmanahalli
Vidyasagar Abburi
Original Assignee
Director General Defence Res & Dev Org
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Filing date
Publication date
Application filed by Director General Defence Res & Dev OrgfiledCriticalDirector General Defence Res & Dev Org
Priority to IN933DE2012priorityCriticalpatent/IN2012DE00933A/en
Publication of IN2012DE00933ApublicationCriticalpatent/IN2012DE00933A/en
The invention relates to a remote GPS based locator system for reporting an at-ocean torpedo for recovery. The system comprising of a remote tracking base station and on¬board dynamic positioning reporting terminal means which is coupled to two external sources such as Global Positioning System satellite and communication satellite. The system is capable of receiving a positioning signal transmitted from the Global Positioning System satellite and transmit the same to the remote tracking station. The on-board dynamic Positioning Reporting Terminal means further coupled to an transponder-antenna means to communicate with GPS satellite and Communication satellite systems. The system further includes an on-board water-pressure identification means for indicative of the approximate position of the torpedo below the water surface and on-board ejection means for eject and extend an antenna towards the ocean surface, when the pressure identification means identifies a water pressure level falling within a preselected range, thereby activating the antenna to communicate with GPS satellite and Communication satellite systems.
Radiobeacon stations, user devices, location determination systems, methods for controlling a radiobeacon station, methods for controlling a user device, and location determination methods