A1.4 The study scenarios and basic system parameters This SEAMCAT simulation study covers six situations in a rural environment with both the ‘victim’ (tactical system) and the ‘interfering’ (amateur station) links operating on the same frequency of 52 MHz: – Base station transmitting to vehicle receiver. – Base station transmitting to handset receiver. – Vehicle transmitting to base station receiver. – Vehicle transmitting to handset receiver. – Handset transmitting to base station receiver. – Handset transmitting to vehicle receiver. Each simulation was run for 20 000 individual random positions with the amateur transmitter free to operate anywhere within a 40 km radius of a tactical transmitter. All the relevant SEAMCAT parameters are given in Table A1.8. The transmission mode of the amateur station is single sideband suppressed carrier (SSB) using a 100 W Peak-Envelope-Power (PEP) transmitter operating with a duty cycle of 5 % which represents 1.2 hours of transmission per day. The amateur transmit and receive antennas have a gain of 9.4 dBi and are located 10 m above ground. The emission mask of the amateur signal is shown in Figure A1.5. The ‘victim’ (tactical) system specifications used for the SEAMCAT studies are shown in Table A1.1 through A1.5: Using the parameters specified for the Protection Criteria of I/N = -6 dB and 10 dB SINAD the equivalent SEAMCAT Noise Floor and Interference Criteria were calculated and a given in Table A1.5 A1.5 SEAMCAT noise floor and interference criteria used for this study floor -126.9 dBm = -169 + 10 log10(16000) C/I 16.97 dB C/(N+I) 10 dB (N+I)/N 0.97 dB I/N -6 dB A1.5 Operational Considerations Tactical systems are likely to be deployed rapidly in response to various situations, operate for a relatively short period of time (hours to days) and then be stood down or moved to another area. The vehicular and handset assets are likely to be highly mobile and move continuously or intermittently throughout the service area, not remaining in any given position for an extended period of time. The handset devices carried by the user have a limited range and the user is highly likely to remain in close proximity to the host vehicle at all times otherwise communication may be lost.
A6.2 WPR location and parameters A6.2 Identified VHF WPR systems in Europe (Red=in 50-54 MHz, Green=out of band) A6.2 WPR locations parameters Sitename WMO Site No Lattitude, N Longitude, E Freq, MHz Power Mean, kW Power Pk, kW Antenna Gain Beam Width Avg mins Kühlungsborn (OSWIN) (Germany) 54.1183 11.7690 53.50 4.5 90.0 30.0 6.0 Uist (UK) 03019, 03020, 03021, 03022 57.3536 -7.3752 64.00 4 .0 40.0 29.0 4.5 15/30 Abersywyth (UK) 3501 52.4245 -4.0055 46.50 2.5 100 (typ.) 160.0 (max.) 35 .0 3.0 30 Clermont-Ferrand (France) 7453 45.7125 3.0903 45.00 0.8 5.0 30.0 5.5 Lannemezan (France) 7626 43.1290 0.3660 45.00 0.8 5.0 30.0 5.5 15 Kiruna (Esrange) (Sweden) 2043 67.8865 21.1065 52.00 72.0 29.0 6.7 30 Andenes (Norway) 1012 69.2980 16.0420 53.50 40.0 800.0 33.5 3.6 SOUSY Svalbard Radar (Norway) 78.1530 16.0300 53.50 0.2 2.0 30.0 5 Rome (Ciampino) (Italy) 16239 41.8080 12.5850 65.50 ? ? ? A6.3 WPR parameters used for study System parameter Range of values peak power (kW) 2 – 800 Average transmitted (kW) 0.2 – 72 Main beam antenna gain (dBi) 29 – 35 Antenna beamwidth (degrees) 3 – 7 Main pointing elevation angle (degrees) 90 (zenith) Tilt angle from main pointing (degrees) 11 – 16