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E3C - Radio Wave Propagation

Extra Class

Radio horizon and multipath: knife-edge diffraction, ground wave, surface wave

12 questions

All E0A E1A E1B E1C E1D E1E E1F E2A E2B E2C E2D E2E E3A E3B E3C E4A E4B E4C E4D E4E E5A E5B E5C E5D E6A E6B E6C E6D E6E E6F E7A E7B E7C E7D E7E E7F E7G E7H E8A E8B E8C E8D E9A E9B E9C E9D E9E E9F E9G E9H
E3C01

What is the cause of short-term radio blackouts?
E3C02

What is indicated by a rising A-index or K-index?
E3C03

Which of the following signal paths is most likely to experience high levels of absorption when the A-index or K-index is elevated?
E3C04

What does the value of Bz (B sub z) represent?
E3C05

What orientation of Bz (B sub z) increases the likelihood that charged particles from the Sun will cause disturbed conditions?
E3C06

How does the VHF/UHF radio horizon compare to the geographic horizon?
E3C07

Which of the following indicates the greatest solar flare intensity?
E3C08

Which of the following is the space-weather term for an extreme geomagnetic storm?
E3C09

What type of data is reported by amateur radio propagation reporting networks?
E3C10

What does the 304A solar parameter measure?
E3C11

What does VOACAP software model?
E3C12

Which of the following is indicated by a sudden rise in radio background noise across a large portion of the HF spectrum?