7 lines
319 B
Python
7 lines
319 B
Python
def p676_gas_attenuation(freq_hz: float, distance_km: float) -> float:
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if freq_hz <= 0:
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raise ValueError("freq_hz must be positive")
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if distance_km < 0:
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raise ValueError("distance_km must be non-negative")
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raise NotImplementedError("ITU-R P.676 gas attenuation requires pycraf integration")
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