Research Article
Experiences Gained during the Development of a Passive BSAR with GNSS Transmitters of Opportunity
Table 1
The main parameters of
different GNSS signals.
| | GNSS | GLONASS | GPS | Galileo |
| | Channels (code) | L1(P) | L2 (P) | L1(P/M) | L2 (P/M) | L5 | E5a/b | E5 (E5a+E5b) | | Central frequency (MHz) | 1602–1615 | 1246–1257 | 1575.4 | 1227.6 | 1176 | 1191.79 | 1191.795 | | Minimum power (dBW) | −161 | −167 | −158 (global beam)
| −154.9 | −157 | −154 | | −138 (spot beam) | | Chip rate (Mcps) | 5.11 | 5.11 | 10.23/5.11 | 10.23/5.11 | 10.23 | 10.23 | 10.23 | | Aggregated bandwidth (MHz) | — | — | 20–30 | 20–30 | — | — | 20–50 | | Range resolution (m) | 30 | 30 | 5–8 | 5–8 | 15 | 15 | 3–8 |
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