After having received my KrakenSDR on 22 August 2022 I spent considerable time for understanding, building, making work and optimizing my KrakenSDR passive radar, kindly supported by krakenrf.com. My passive radar is now in fully working condition, providing me with stunning results.
In order to help you with your passive radar project I wrote a step-by-step guide:
KrakenSDR_Pi4_Passive_Radar_Step-by-Step.pdf
I may provide updates under this link from time to time. The current document version 1.9 is dated 25 October 2022.
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Document version 1.5 introduced a suggestion for a battery pack power supply on page 4 and a new chapter “Pushing the Clutter Limit” on page 18.
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Document version 1.6 complements “Pushing the Clutter Limit” with a common mode rejection balun to push the limit even further.
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Document version 1.7 improves on the various WiFi options (page 7ff) and adds a chapter about range on page 21.
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Document version 1.8 contains some remarks about the units of “Max Bistatic Range [km]” and “Max Doppler [Hz]”. See https://github.com/krakenrf/krakensdr_docs/wiki/08.-Passive-Radar#range-doppler-units for the bistatic distance and radial speed.
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Document version 1.9 is a cleaned-up version of version 1.8.
At https://www.redgo.ch/KrakenSDR/V1.3_Range_and_Radial_Speed.xlsx you will find an Excel spreadsheet to compute bistatic range and radial speed dependent on your KrakenSDR Passive Radar settings and readings, valid for KrakenSDR Pi 4 image V1.3.