When a pair of tiger cubs are relocated to the Sariska Tiger Reserve in the coming days, wildlife experts won't leave them at the mercy of marauding poachers who wiped out big cats from the sanctuary in Rajasthan by 1993. The cubs, to be shifted from the Ranthambore Tiger Reserve, will be fitted with radio collars and constantly monitored by a satellite. The collars, each costing Rs 8 lakh, have been procured from a Canada-based firm, Lotek, sources said. The satellite is operated by Argos system, which is supported by Nasa, the National Oceanic and Atmospheric Administration (US), and the French space agency, CNES. The transmitters in the collars will send out information in short pulses. The satellite will pick up signals and retransmit them to the Argos centres for processing. Results can be retrieved from anywhere in the world by public data networks, often within 20 minutes of transmission, the sources said. This will help the wildlife authorities keep track of the movement of the cubs and their behaviour. Relocating cubs to a new habitat