The sum of the percentages in the table implies that all of data collection platforms (High rate, Low Rate, Regional and International) are operating at the same time within the satellite footprint. This is a worst case assumption. 6.1.4 Application of the narrow-band criterion The narrow-band criteria for each satellite system are presented in Tables 3-1, 3-2, 3-3, 3-4 and 3-5. It is presented as a power level in dBm. It represents the maximum level for a single interfering transmitter. The specified spurious emissions level for data collection platform is significantly lower than the interference threshold. Table 6-7 shows the comparison of the sensitivity levels for four cases, one each for the LEO and GEO orbits and two for MEO orbits, compared to the direct emission levels from the data collection platforms. TABLE 6-7 Narrow-band margins System Maximum permissible Maximum Calculated Margin level of in-band permissible mean between interference from level of in-band interference received tables interference power power and narrow-band threshold SARP on LEO satellite dBm (Table 3-1) dBW –147 –177 Low Data Rate dBW 27.29 dB –149.71 High Data Rate dBW 31.11 dB –145.89 Regional dBW 47.88 dB –129.12 International dBW 43.14 dB –133.86 SARR on MSG dBm (Table 3-2) dBW –147 –177 GEOSAR Low Data Rate dBW 8.69 dB –168.31 High Data Rate dBW 10.91 dB –166.09 Regional dBW 24.68 dB –152.32 International dBW 29.94 dB –147.06 SARR on MEO satellite dBm (Table 3-4) dBW –136.8 –166.8 (Galileo) Low Data Rate dBW 11.71 dB –155.09 High Data Rate dBW 8.92 dB –157.88 Regional dBW 28.52 dB –138.28 International dBW 23.74 dB –143.06 SARR on MEO satellite dBm (Table 3-5) dBW –147.1 –177.1 (GLONASS) Low Data Rate dBW 18.96 dB –158.14 High Data Rate dBW 21.18 dB –155.92 Regional dBW 32.3 dB –144.80
The sum of the percentages in the table implies that all of data collection platforms (High rate, Low Rate, Regional and International) are operating at the same time within the satellite footprint. This is a worst case assumption. 6.1.4 Application of the narrow-band criterion The narrow-band criteria for each satellite system are presented in Tables 3-1, 3-2, 3-3, 3-4 and 3-5. It is presented as a power level in dBm. It represents the maximum level for a single interfering transmitter. The specified spurious emissions level for data collection platform is significantly lower than the interference threshold. Table 6-7 shows the comparison of the sensitivity levels for four cases, one each for the LEO and GEO orbits and two for MEO orbits, compared to the direct emission levels from the data collection platforms. TABLE 6-7 Narrow-band margins System Maximum permissible level of in-band interference from tables Maximum permissible level of in-band interference Calculated mean interference power Margin between received power and narrow-band threshold SARP on LEO satellite –147 dBm (Table 3-1) –177 dBW Low Data Rate –149.71 dBW 27.29 dB High Data Rate –145.89 dBW 31.11 dB Regional –129.12 dBW 47.88 dB International –133.86 dBW 43.14 dB SARR on MSG GEOSAR –147 dBm (Table 3-2) –177 dBW Low Data Rate –168.31 dBW 8.69 dB High Data Rate –166.09 dBW 10.91 dB Regional –152.32 dBW 24.68 dB International –147.06 dBW 29.94 dB SARR on MEO satellite (Galileo) –136.8 dBm (Table 3-4) –166.8 dBW Low Data Rate –155.09 dBW 11.71 dB High Data Rate –157.88 dBW 8.92 dB Regional –138.28 dBW 28.52 dB International –143.06 dBW 23.74 dB SARR on MEO satellite (GLONASS) –147.1 dBm (Table 3-5) –177.1 dBW Low Data Rate –158.14 dBW 18.96 dB High Data Rate –155.92 dBW 21.18 dB Regional –144.80 dBW 32.3 dB
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