{"product_id":"kerberossdr-4-channel-coherent-rtl-sdr-for-direction-finding","title":"KerberosSDR — 4-Channel Coherent RTL-SDR for Direction Finding","description":"\u003cp\u003eThe KerberosSDR is a four-channel coherent software defined radio system built for direction finding (DF) and passive radar applications that are impossible with a single-receiver SDR. Four RTL-SDR receivers share a single reference clock and noise source calibration circuit, enabling phase-coherent sampling across all four channels simultaneously.\u003c\/p\u003e\u003cp\u003eWhen paired with a four-element antenna array and the open-source KrakenSDR or Kraken Android app, the system performs real-time direction-of-arrival estimation using MUSIC, Bartlett, and Capon algorithms — visualising the angular bearing of any RF source in view. Applications include amateur radio foxhunting (ARDF), interference hunting, wildlife radio collar tracking, and passive radar demonstrations using DVB-T and FM broadcast illuminators.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e4× RTL2832U receivers with shared 28.8MHz reference clock\u003c\/li\u003e\n\u003cli\u003eFrequency range: 24–1766MHz per channel\u003c\/li\u003e\n\u003cli\u003ePhase coherent sampling: all 4 channels synchronized\u003c\/li\u003e\n\u003cli\u003eNoise source for automatic phase calibration\u003c\/li\u003e\n\u003cli\u003eSMA connectors × 4\u003c\/li\u003e\n\u003cli\u003eUSB hub board (powered from single USB-C input)\u003c\/li\u003e\n\u003cli\u003eCompatible with KrakenSDR app, GNU Radio, Python\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Golden Physics Project","offers":[{"title":"Default Title","offer_id":54186573955364,"sku":"GPP-KERBEROS-SDR","price":149.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/2879\/9524\/files\/kerberos-sdr-454A0078.jpg?v=1780905161","url":"https:\/\/shop.goldenphysics.org\/products\/kerberossdr-4-channel-coherent-rtl-sdr-for-direction-finding","provider":"Golden Physics Project","version":"1.0","type":"link"}