Scientists devise new technique to detect cyclones earlier than satellites The method could bring about the genesis of prediction with a minimum of four days lead time for cyclones. Share Via Email | A+A A- By Express News Service NEW DELHI: Indian scientists have found a promising technique which can help detect tropical cyclones over the Indian Ocean prior to the satellites. Early detection of tropical cyclones has wide socio-economic implications. So far, remote sensing techniques have detected them the earliest. However, this detection was possible only after the system developed as a well-marked low-pressure system over the warm ocean surface. A larger time gap between the detection and the impact of the cyclone could help preparation activities.