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ISS Bounce QSO Calculator

// Bistatic radar link budget · passive reflection · weak-signal digital modes

Bistatic Radar Eq. Q65 / MSK144 / FT8 / CW Doppler Analysis Budget Waterfall Pass Timing Optimisation Tips SVG Path Map

      ISS altitude: 380–440 km

      ISS velocity: 7.66 km/s

      ISS RCS: 100–2000 m²

      Best mode: Q65-60A

      Ref: bistatic radar eq.

Station Parameters

Station 1

Maidenhead Grid Locator

→ decoding…

Callsign (optional)

Station 2

Maidenhead Grid Locator

→ decoding…

Callsign (optional)

RF Parameters (both stations equal)

Frequency

Tx Power (W)

10 W

Dish Diameter (m)

0.76 m

Dish Efficiency η

0.60

System Noise Temp Tsys (K)

200 K

ISS Parameters

ISS Altitude (km)

408 km

ISS Radar Cross Section σ (m²)

500 m²

Digital Mode

Q65-60A Q65-30A Q65-15A MSK144 FT8 CW

Q65-60A: min SNR −33 dB (2500 Hz BW, 60s integration) · best Doppler tolerance

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