From 88ffd87a6b1a0f9c6b82392e8b428248c8052572 Mon Sep 17 00:00:00 2001 From: krakenrf <78108016+krakenrf@users.noreply.github.com> Date: Sat, 15 Oct 2022 21:40:50 +1300 Subject: Updated 08. Passive Radar (markdown) --- 08.-Passive-Radar.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/08.-Passive-Radar.md b/08.-Passive-Radar.md index cb79d6a..10189c6 100644 --- a/08.-Passive-Radar.md +++ b/08.-Passive-Radar.md @@ -119,7 +119,7 @@ In the future we aim to have software enhancements that make understanding and v ![image](https://user-images.githubusercontent.com/78108016/170861790-531a46a8-87f3-442a-941a-89ae110142f3.png) -The bistatic range displayed on the KrakenSDR range-doppler graph is described by the formula $\mathrm{Bistatic Range (meters)} = R_b = R_tx + R_rx - L$. So you can see that a single reading on the range-doppler graph describes an ellipse of possible locations. +The bistatic range displayed on the KrakenSDR range-doppler graph is described by the formula $\mathrm{Bistatic Range (meters)} = R_b = R_{tx} + R_{rx} - L$. So you can see that a single reading on the range-doppler graph describes an ellipse of possible locations. # Range Resolution Range resolution depends on the sampling bandwidth, which for the KrakenSDR and RTL-SDR tuners inside is 2.4 MHz. Therefore we achieve $\frac{c}{fs} = \frac{299792458}{2400000} = ~125m$ resolution per range cell on the graph (assuming the illuminating signal is at least 2.4 MHz as well). -- cgit v1.2.3