| 摘要 |
A computer program product comprising a computer useable medium having computer readable program code embodied therein for intercepting and monitoring communications between at least one mobile device and a main station of communication system, wherein communication between the at least one mobile and a satellite is achieved by using L-band spot beams, chosen by the mobiles and wherein communication between the satellite and the main station is achieved by using a wideband C-band link, said computer program product comprising computer readable program code for causing the computer to identify substantially simultaneously a subset including at least one C-band frequency from among said C-band frequencies which subset of frequencies prima facie is mapped to an L hand frequency, said computer readable program code for causing the computer to identify including: computer readable program code for causing the computer to analyze energy detected in said C band frequencies; and computer readable program code for causing the computer to identify a C-band frequency from among said subset of frequencies which is mapped to said L band frequency. |
