hf:solar-terrestrial-data
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| hf:solar-terrestrial-data [2025/06/16 19:40] – [Solar Terrestrial Data] m0lte | hf:solar-terrestrial-data [2025/06/18 07:26] (current) – [Geophysical Environment] m0lte | ||
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| These affect the ionosphere, which in turn impacts radio wave propagation. | These affect the ionosphere, which in turn impacts radio wave propagation. | ||
| - | ^ Label ^ Meaning | + | ^ Label ^ Example |
| | **SFI** (Solar Flux Index) | 178 | Higher SFI (100–200+) means better HF propagation | | | **SFI** (Solar Flux Index) | 178 | Higher SFI (100–200+) means better HF propagation | | ||
| | **SN** (Sunspot Number) | 124 | More sunspots = more ionization = improved HF conditions. 100-250 is the approximate range during solar maximum - see below for more info. | | | **SN** (Sunspot Number) | 124 | More sunspots = more ionization = improved HF conditions. 100-250 is the approximate range during solar maximum - see below for more info. | | ||
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| ===== Geophysical Environment ===== | ===== Geophysical Environment ===== | ||
| - | ^ Item ^ Meaning ^ | + | ^ Item ^ Example + Meaning ^ |
| | **Geomag Field** | MIN STORM — mild geomagnetic disturbance ongoing | | | **Geomag Field** | MIN STORM — mild geomagnetic disturbance ongoing | | ||
| | **Sig Noise Level** | S4–S6 — background band noise (S1 = low, S9+ = high) | | | **Sig Noise Level** | S4–S6 — background band noise (S1 = low, S9+ = high) | | ||
hf/solar-terrestrial-data.1750102830.txt.gz · Last modified: by m0lte