Multilateration (MLAT) is the backbone of modern passive radar surveillance, enabling the location of non-ADS-B aircraft via Time Difference of Arrival (TDoA) of Mode-S signals.
📡 Specifiche Hardware & Parametri RF
Frequency: 1090 MHzGain: 5-8 dBiNF: < 1.5 dBSDR: RTL-SDR Blog V3/V4
RF Architecture and Timing
The core of an MLAT system lies in timestamping precision. Since the 1090 MHz signal travels at the speed of light, a 100ns timing error results in a 30m location error.
Bandpass Filters: Cavity vs SAW
Cavity filters are preferred in dense urban environments to prevent receiver saturation from cellular signals.
LNA and Bias-Tee
Integrating a low-noise LNA directly at the antenna base minimizes coaxial cable insertion losses.
| Parameter | Optimal Value |
|---|---|
| Cable | LMR-400 |
| Frequency | 1090 MHz |
💡 Pro-Tip Installation: Keep cable runs under 10 meters to avoid excessive attenuation.
“Receiver geometry dictates GDOP; a circular layout optimizes spatial precision.”
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