Ahmadabad, India: India’s Oceansat II satellite is capable to predict accurately the intensity of cyclones as well as the locations it will hit as early as three days in advance. The data is available in near real time mode (within 3 hours) through www.nrsc.gov.in, according to Dr Raj Kumar, Head of Oceanic Sciences Division, in Space Application Centre.
Oceansat II is equipped with scatterometer, radio occultation sounder, ocean colour monitor and such other equipment. It can also predict the cyclones’ intensity and the locations they will hit. Scatterometer is a Ku-band pencil beam radar with wide swath of 1800 km for deriving surface wind vectors (speed and direction) over global oceans. It transmits the energy in microwave region which scattered back from the ocean surface which is mainly due to change in ocean surface wind vector.
Dr. Kumar explained, “With observations of ocean surface wind vectors over global oceans, the strength and movement of cyclones can be monitored right from early stages of its formation till its landfall was demonstrated by ISRO.”
Dr B S Gohil, Head Geophysical Parameter Retrival Division said, “Apart from atmospheric application, ocean surface wind provides parameters for studying ocean’s general circulation. Scatterometer data is also useful for ocean wave mapping and wave forecasting.”
Dr Gohil added, “The ocean surface vector winds provided by scatterometer data are presently being utilised operationally by ISRO in atmospheric models to provide improved weather forecast. The positive impact of these winds provided by Oceansat II scatterometer has also been observed in numerical models for ocean circulation and surface waves.”
Source: Ahmedabad Mirror