TS can theoretically be derived for simple targets such as spheres and cylinders , but in practice it is mostly empirically measured or calculated with numerical models . TS can be derived theoretically for simple targets such as spheres and cylinders , but in practice , it is usually measured empirically or calculated with numerical models .
TS secara teorinya boleh diperolehi untuk sasaran mudah seperti sfera dan silinder, tetapi dalam praktiknya kebanyakannya diukur secara empirikal atau dikira dengan model berangka. TS boleh diperolehi secara teori untuk sasaran mudah seperti sfera dan silinder, tetapi dalam praktiknya, ia biasanya diukur secara empirikal atau dikira dengan model berangka.