How to interpolate grid data to polar grid on a certain position?

How to bilinearly interpolate grid data which has certain resolution to cylindrical or polar grids centered on each individual tropical cyclone center radially every 100km?

[KSSV]

Do the interpolation in Cartesian coordinates and then convert to polar/ cylindrical..

[sarah connor]

Tanks for your reply! But I also have a question that, distance of one longtitude is different in each latitude. Fllowing is the grid that I want to interpolate to, which 'i' is refer to one degree of longtitude and also represents to the radiu. My question is how can I define my radiu since it varies with the latitude? (x00,y00 are the position of tropical cyclone) for i=1:40 xo(i,:) = x00 + i*cos(theta*pi/180); yo(i,:) = y00 + i*sin(theta*pi/180); end