geometryfieldofview

convert angular FOV to FOV in km

I need to calculate the FOV [km].

the angular FOV is = 98 x 98° and the distance of object is = 86km

FOV [km] = (tan(98/2) * 180 / pi) * 86

gives negative results. Where could be my error?

Solution

  • You have to put pi/180 multiplier inside parentheses, it should be applied to angle

    FOV [km] = tan(98/2 * pi / 180) * 86 * 2 = 198 km

    Note x2 for full range