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38 lines
1.3 KiB
Python
38 lines
1.3 KiB
Python
from core.constants import BANDS
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HF_BANDS = [b for b in BANDS if b.is_ham_hf]
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def _latest(d) -> float | None:
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"""Given a map where the key is a timestamp and the value is a number represented as a string, find the latest
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timestamp and return the corresponding value as a float."""
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val = str(d[max(d.keys())]) if d else None
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return float(val) if (val is not None and val != "None") else None
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def compute_band_states(fof2_dict, muf_dict, luf_dict):
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"""Compute HF band states from the latest foF2, MUF and LUF values.
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Returns a map where the keys are HF bands and the values are as follows:
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"Closed" if band frequency is above MUF or below LUF (if known)
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"Short" if band frequency is >= LUF and < foF2 (good for NVIS)
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"Long" if band frequency is >= foF2 and < MUF (good for DX)
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"""
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fof2 = _latest(fof2_dict)
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muf = _latest(muf_dict)
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luf = _latest(luf_dict) if luf_dict else None
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if fof2 is None or muf is None:
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return {}
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band_states = {}
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for band in HF_BANDS:
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freq = band.start_freq / 1_000_000
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if freq > muf or (luf is not None and freq < luf):
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band_states[band.name] = "Closed"
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elif freq < fof2:
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band_states[band.name] = "Short"
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else:
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band_states[band.name] = "Long"
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return band_states
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