Communication System

The Communication Subsystem of NARSSCUBE1 satellite has two communication channels; the CW and the FM channels. The transmitted power of both channels is 1 watt, at frequency (437.97 MHz, 435.384 MHz & 437.857 MHz).
The CW channel is used for sending the Beacon Morse code at 60 WPM, the beacon duration is about 10 Sec while the FM channel uses AX.25 protocol to communicate with the ground control station.
The communication subsystem uses SSP protocol on the satellite internal bus where it acts as a router that receives the ground commands and forwards them to the required subsystem, then it receives the response and replies properly to the ground station through the FM channel. Also the communication subsystem stores the captured image to be downloaded to the ground station upon its request during the communication session.