1. © 2011 Stansell Consulting Do LightSquared and the FCC Threaten GPS? Tom Stansell Stansell Consulting Tom@Stansell.com

2. Slide 2 © 2011 Stansell Consulting Presumed transcript of a radio conversation between a US naval ship and Canadian authorities (CND) off the coast of Newfoundland. US Ship: Please divert your course 0.5 degrees to the south to avoid a collision. CND reply: Recommend you divert your course 15 degrees to the South to avoid a collision. US Ship: This is the Captain of a US Navy Ship. I say again, divert your course. CND reply: No. I say again, you divert YOUR course! US Ship: THIS IS THE AIRCRAFT CARRIER USS CORAL SEA, WE ARE A LARGE WARSHIP OF THE US NAVY. DIVERT YOUR COURSE NOW!! CND reply: This is a lighthouse. Your call. The Lighthouse Story

3. Slide 3 © 2011 Stansell Consulting GPS versus an Important National Priority? Link to: “President Obama Details Plan to Win the Future through Expanded Wireless Access”

4. Slide 4 © 2011 Stansell Consulting Could Political Influence be Part of the Process? Letter from the National Legal and Policy Center Editorial from The Washington Times Article in The Washington Examiner Article in USA Today

5. Slide 5 © 2011 Stansell Consulting What is the GPS Community Doing About the Threat? www.saveourgps.org Save Our GPS WebsiteTestimony of Jim Kirkland, Vice President and General Counsel of Trimble Navigation Limited CBS Radio Reports http://licensing.fcc.gov/cgi-bin/ws.exe/prod/ib/forms/reports/related_filing.hts?f_key=-216679&f_number=SATMOD2010111800239 Link to Documents Filed with the FCC

6. Slide 6 © 2011 Stansell Consulting GPS Concerns and Numbers

7. Slide 7 © 2011 Stansell Consulting How Can ATC Signals Affect GPS?  LightSquared plans 40,000 high power transmitters  Desensitization by overdriving RF amplifiers  Gain compression of RF/IF amplifiers with strong signals  Depends somewhat on number of signal sampling levels  AGC performance also can be adversely affected  Creating third order intermodulation products  In nonlinear GPS RF/IF due to strong input signals  Major threat to StarFire and OmniSTAR  Correction messages from Inmarsat in the MSS Band

8. Slide 8 © 2011 Stansell Consulting LTE Signal Characteristics  Base station requires a linear amplifier  Uses 4.5 MHz out of any 5 MHz band  Carrier spacing is 15 kHz, which is the data rate  Orthogonal Frequency Division Multiplexing (OFDM)  In a 10 MHz band, 600 subcarriers  Filling 600 x 0.015 = 9 MHz

9. Slide 9 © 2011 Stansell Consulting NTIA Frequency Allocation Chart

10. Slide 10 © 2011 Stansell Consulting MSS and GNSS Allocations 24 MHz 51MHz S-E is Space to Earth

11. Slide 11 © 2011 Stansell Consulting FCC Table of Allocations

12. Slide 12 © 2011 Stansell Consulting Page 31 of FCC Table of Allocations GNSS MSS

13. Slide 13 © 2011 Stansell Consulting LightSquared Signal Characteristics -160 dBW/Hz -150 dBW/Hz

14. Slide 14 © 2011 Stansell Consulting Transmitter Bandpass Filters 32 dBW/10 MHz 22 dBW/MHz -38 dBW/Hz -8 dBm/Hz Filter only, does not account for spectral characteristics of the LTE waveform Out of Band EIRP power density in GPS band stated to be -160 dBW/Hz

15. Slide 15 © 2011 Stansell Consulting Free Space Propagation Loss

16. Slide 16 © 2011 Stansell Consulting Potential 3 rd Order Intermod Products

17. Slide 17 © 2011 Stansell Consulting Closing Thoughts

18. Slide 18 © 2011 Stansell Consulting Presumed transcript of a radio conversation between LightSquared and the GPS Community. LightSquared: Please divert your course 0.5 degrees to the south to avoid a collision. GPS reply: Recommend you divert your course 15 degrees to the South to avoid a collision. LightSquared: This is the CEO of a Multi-billion Dollar Hedge Fund. I say again, divert your course. GPS reply: No. I say again, you divert YOUR course! LightSquared: THIS IS HARBINGER CAPITAL PARTNERS! WE ARE VERY INFLUENTIAL. DIVERT YOUR COURSE NOW!! GPS reply: This is GPS, a Vital National Infrastructure. Your call. The LightSquared Dilemma