` Aditya-1 will take images ev­ery sec­ond'

Down to Earth - - SCIENCE -

DI­PANKAR BAN­ER­JEE of the In­dian In­sti­tute of Astro­physics (IIA), Ben­galuru, which is one of the in­sti­tu­tions work­ing on Mis­sion Aditya-1, speaks to Down­ToEarth What spe­cific area of the mis­sion is the IIA work­ing on? IIA is mak­ing the Vis­i­ble Emis­sion Line Coron­a­graph (VELC), which is one of the main pay­loads. Coron­a­graph cre­ates an ar­ti­fi­cial to­tal so­lar eclipse in space by block­ing the sun­light by an oc­cul­tor. This tele­scope will have ca­pa­bil­i­ties of spec­tral imag­ing of the corona in vis­i­ble and in­fra-red. We are in phase 1 of the mis­sion. De­sign and re­view are al­most com­plete. What is go­ing to be the pay­load ca­pac­ity of the mis­sion? The coron­a­graph is the big­gest pay­load oc­cu­py­ing 60 per cent of weight of the in­stru­ments on board Aditya-1. Us­ing this pay­load, we want to study the dy­namic changes in the sun. How is Aditya-1 dif­fer­ent from pre­vi­ous mis­sions to the sun? Aditya-1 is a multi-wave­length ob­ser­va­tory which will look at dif­fer­ent lay­ers of the so­lar at­mos­phere. Aditya-1 is dif­fer­ent in many ways. Take NASA's STEREO. It has two coro­n­a­graphs and one im­ager. The coro­n­a­graphs on board STEREO take images ev­ery 10 min­utes, and probes only at the outer corona. Aditya-1's VELC, on the other hand, will look at the in­ner corona and will take images ev­ery sec­ond.

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