%% plate scale,pixel size = 0.6 arcseconds/pixel
p = 1/0.6

%% Radius of the Sun/Earth-Sun distance
a = 0.0046491838

%% scaling factor, converting it to degrees
s = a*p*3600*0.640365

%% Central pixels
xC = 2048;
yC = 2048;

%% latitude and longitude
l = 0
b = -90

x = round((b*s*cos((l*pi)/180))+xC)
y = round((l*s)+yC)