1. harris.com THIS INFORMATION IS NOT EXPORT CONTROLLED THIS INFORMATION IS APPROVED FOR RELEASE WITHOUT EXPORT RESTRICTIONS IN ACCORDANCE WITH A REVIEW OF THE INTERNATIONAL TRAFFIC IN ARMS REGULATIONS (ITAR), 22CFR 120-130, AND THE EXPORT ADMINISTRATION REGULATIONS (EAR) 15 CFR 730-774. Channel availability Results Western New York, USAHFIA WBHF Channel Availability WG 9 / 9 / 2014, Portsmouth, UK

2. | 2 Harris Proprietary | Overview A comparison of (2) Perseus receivers fed from a single antenna Simultaneous results from two sites in Western NY, USA Conclusions

3. | 3 Harris Proprietary | 1 /29/13 A comparison of (2) Perseus receivers / single antenna Perseus A Perseus B

4. | 4 Harris Proprietary | 1 /29/13 A comparison of (2) Perseus receivers / single antenna Maximum difference seems to be 2% Average difference over 24 Hr and 2-30 MHz is 0% Perseus A Perseus B

5. | 5 Harris Proprietary | 1 /29/13 Simultaneous results from two sites in Western NY, USA Sites approximately 20km apart, Rush, NY and Fairport, NY (Blackwatch) Perseus Receivers, Clifton Labs antennas, Blackwatch with Harris whip antenna

6. | 6 Harris Proprietary | Simultaneous results from two sites in Western NY, USA 3KHz Results Total Availability 2-12 MHz Blackwatch 218.37 Rush 213.42 Rush Blackwatch ABS(Difference)

7. | 7 Harris Proprietary | Simultaneous results from two sites in Western NY, USA 12 KHz Results Total Availability 2-12 MHz Blackwatch 205.89 Rush 200.43 Rush Blackwatch ABS(Difference)

8. | 8 Harris Proprietary | Simultaneous results from two sites in Western NY, USA 24 KHz Results Total Availability 2-12 MHz Blackwatch192.46 Rush 187.42 Rush Blackwatch ABS(Difference)

9. | 9 Harris Proprietary | Simultaneous results from two sites in Western NY, USA Summary –Simultaneous results, measured 20km apart –Equipment and software identical ( w exception of Harris whip) –CMA Results highly consistent between two sites Point for examination –Rush site seems to have a segment of lower channel availability in the 3-4 MHz range from 1200 to 0000 UTC ( 0800-2000 LT) –Could this be local interference? –Examine individual files

10. | 10 Harris Proprietary | Simultaneous results from two sites in Western NY, USA Examining collected data files show a decrease in noise floor of 10-15dB over the range of 3-4 MHz Current noise- floor technique averages lowest 30kHz in 1 MHz bandwidth

11. | 11 Harris Proprietary | Simultaneous results from two sites in Western NY, USA Examining collected data files show a decrease in noise floor of 10- 15dB over the range of 3-4 MHz Current noise-floor technique averages lowest 30kHz in 1 MHz bandwidth Good News! Current results are actually pessimistic, availability is actually higher! Need to develop a better, variable noise floor estimation technique

12. | 12 Harris Proprietary | Summary Simultaneous results, measured 20km apart Equipment and software identical ( with exception of Harris whip) CMA Results highly consistent between two sites Current analysis software does not adequately handle cases where the noise floor has a significant “slant” over the 1 MHz observation bandwidth An alternate method of determining a varying noise-floor estimate needs to be developed Results are still valid and if anything pessimistic.