1. Department of Aerospace Engineering IIT Bombay

2. Contents Design of telemetry, beacon and uplink modules Design and fabrication of final Onboard PCBs Allocation of frequencies by IARU Integration of Groundstation at IITB Social Goal

3. Communication Subsystem Onboard BeaconTelemetryUplinkGroundstation Polarisation Measurement Signal reception

4. Telemetry Module CC 1020 daughter board Coded by OBC Data input in the form of AX.25 packets Modulates the signal RF5110 G with perpendicular berg strips and perpendicular SMA Amplifies the signal Monopole Radiates the signal

5. Beacon Module Atmega 8 microcontroller to be used Morse encoding to be done by the microcontroller Codes the daughter board ADF 7020 daughter board Transmitting at 144.5 MHz To be tuned Duty cycle is 50 % Modulates the signal RF5110 G with perpendicular berg strips and perpendicular SMA Amplifies the signal Monopole Radiates the signal

6. Uplink Module Monopole Receives the signal SRZ LNA from RFMD Satisfies the operational parameters Gain is 30 dB Amplifies the received signal CC 1020 daughter board Receiving at 437 MHz Demodulates after a certain RSSI value Demodulates the signal Atmega 8 microcontroller to be used Decode the kill signal and pass on to Power Decodes the signal

7. Monopole and Monopole holder

8. Onboard antenna mounting

9. Allocation of frequencies by IARU Conditions for frequency allocation Amateur Ham License or a Custodian Detailed link budget analysis Telemetry sequence Details about the GS and Onboard circuity and their functionalities Uplink or telecommand to control the satellite.

10. Groundstation setup: Polarisation Crossed Yagi mounted on a rotor controlled by NOVA and ARS Antenna Amplifies the signals 3 LNA’s to be used LNA Takes in 2 feeds Gives output corresponding to polarization angle AD8032

11. Groundstation setup: Telemetry Crossed Yagi mounted on a rotor controlled with ARS and NOVA Antennae Amplifies the signal LNA Base station to receive signals Can be used to decode the data packets Receiver

12. Social Goal We have undertaken Social goal as a part of our Communication Subsystem task. The Social goal aims to involve universities across the nation for the purpose of generating a TEC Map of India. The readings received from the Groundstation can also be used for the purpose of Tomography of the Ionosphere. We have also entered into a collaboration with IPGP France who shall be utilising our TEC data for their scientific research.

13. Thank You