Sakhawat, S., M. Usman, and A. Hanif. “POWER BUDGET ANALYSIS OF REFLECTED GPS L1 AND L5 FREQUENCY SIGNALS FOR PASSIVE MICROWAVE IMAGING”. The Nucleus, vol. 51, no. 1, Mar. 2014, pp. 87-92, http://202.83.167.189/index.php/Nucleus/article/view/725.