 A GEO satellite transmits a signal in an 11700 MHz downlink channel. What is the path loss the signal experiences? If the EIRP is 40 dBW, and the receiver noise level is - -125 dBm, what is the received SNR if the earth station antenna gain is 60 dB? Can this system support high quality analogue voice communications if the required SNR is 30 dB? 8. Explain two reasons behind the commercial failure of LEO satellite mobile communica- tions companies (such as Iridium). 9. How was Intelsat governed considering its international ownership? 10. How do satellite systems complement broadband service provision? 11. What are the relative advantages and disadvantages of using an internationals service such as Intelsat or O3B for a national broadband network? 12. Compare the O3B and Intelsat broadband services using the TBP framework. 13. What are the drivers behind the roll out of a service such as O3B? 14. What were the drivers behind the roll out of GPS services? 15. Why did the US policy makers allow for GPS services to be used in civilian applications? 16. Why are there SO many satellite navigation programmes in the pipeline? 17. What are the policy issues regarding spectrum allocation for LEO satellite mobile telecommunications services? 18. What were the business drivers behind Iridium's network development? What were the miscalculations? References [1] https://en.wikipedia.org/wiki/Sputnik_1#/media/File:Sputnik_asm.jpg,accessed 17 August 2015. [2] http://www.intelsat.com/about-us/company-facts/,accessed 26 October 2014. [3] http://www.acma.gov.au/theACMA/mobilesatellite-services-band-plan-2-ghz-overview, accessed 23 October 2014. [4] IEEE. (1984) IEEE Standard Letter Designations for Radar-Frequency Bands, IEEE Standard 521-1984. [5] http://www.ntia.doc.gov/files/ntia/publications/spectrum_wall_chart_aug2011.pdf,accessed 23 October 2014. Satellite Communications [6] http://www.ntia.doc.gov/files/ntia/publications/redbook/2014-05/4b_14_5.pdf,accessed 23 October 2014. [7] http://www.ceduna.sa.gov.au/page.aspx?u=495#OT