1. The Gateway of Amateur Satellites for Internet Users By Junsang, Bo, Suresh, Vinh

2. Big Picture amateur satellite modem UHF/VHF Radio computer antenna with rotator base RS232 Cable

3. Software amateur satellite modem UHF/VHF Radio computer antenna with rotator base RS232 Cable Run tracking program and server program.

4. Modem amateur satellite modem UHF/VHF Radio computer antenna with rotator base RS232 Cable Run tracking program and server program. Packet translator (AD and DA converter)

5. UHF/VHF Radio amateur satellite modem UHF/VHF Radio computer antenna with rotator base RS232 Cable Run tracking program and server program. Packet translator (AD and DA converter) Transceiver for sending/receiving data

6. Antenna amateur satellite modem UHF/VHF Radio computer antenna with rotator base RS232 Cable Run tracking program and server program. Packet translator (AD and DA converter) Transceiver for sending/receiving data 2 meter YAGI antenna

7. Rotator amateur satellite modem UHF/VHF Radio computer antenna with rotator base RS232 Cable Run tracking program and server program. Packet translator (AD and DA converter) Transceiver for sending/receiving data 2 meter YAGI antenna Motor for tracking system.

8. RS232 amateur satellite modem UHF/VHF Radio computer antenna with rotator base RS232 Cable Run tracking program and server program. Packet translator (AD and DA converter) Transceiver for sending/receiving data 2 meter YAGI antenna Motor for tracking system RS232 Line for motor control

9. User point-of-view amateur satellite All equipments will use lower power (car battery…). User connect GASIU™ to laptop and to antenna. Launch tracking software. Initialize position and begin tracking user selected satellite (data given by NASA). Software go through self diagnostic (send/receive test data frame to satellite). Pop green GUI bubble on client laptop. GASIU™

10. Hardware Computer (preferably a laptop or something portable) 9600 bps modem (custom firmware on existing circuits, customized modem on FPGA) UHF/VHF Radio (off the shelf components) YAGI antenna Motor and controlling circuit for antenna base (X,Y,Z axis) Power supply to power all components except for the computer. Car battery? UPS unit?

11. Software User interface for sending/receiving data. Satellite tracking software (use NASA J-track database). Motor control and self diagnostic utilities. Server software (http, ftp, etc.)

12. Current Obstacles

13. Inexperience with satellite communication. –Example: Whether we can send data and receive our sent data before satellite go below the horizon. Response time of tracking system for acceptable tracking error margins. Noises (circuit, atmospherics, etc).

14. Conclusion Our project can be independently implemented and tested. computer antenna with rotator base RS232 Cable Tracking System amateur satellite

15. Conclusion Our project can be independently implemented and tested. computer antenna with rotator base RS232 Cable Tracking System UHF/VHF Radio antenna with rotator base Com Link amateur satellite

16. Conclusion Our project can be independently implemented and tested. computer antenna with rotator base RS232 Cable Tracking System UHF/VHF Radio antenna with rotator base Com Link modem computer Up/Down link amateur satellite

17. Finish