Aradiosonde is launched from 20°s. at an altitude of 1 km the temperature is measured to be 280 k with the wind found to be blowing 10 ms-1 towards the north. assume for the following questions this wind is purely geostrophic. (a) explain what is meant by the term geostrophic. include an explanation of when this assumption can be applied (b) calculate the coriolis parameter at this location. (c) determine the value of the horizontal pressure gradient at this location4 (d) at 3 km the wind velocity is measured to be 10 ms1 to the east and 20 ms1 to 2 the north. determine the horizontal temperature gradient at 1km.