ionosondeとは 意味・読み方・使い方

An ionosonde, or chirpsounder, is a special radar for the examination of the ionosphere. An ionosonde consists of:

• A high frequency (HF) transmitter, automatically tunable over a wide range. Typically the frequency coverage is 0.5–23 MHz or 1–40 MHz, though normally sweeps are confined to approximately 1.6–12 MHz.
• A tracking HF receiver which can automatically track the frequency of the transmitter.
• An antenna with a suitable radiation pattern, which transmits well vertically upwards and is efficient over the whole frequency range used.
• Digital control and data analysis circuits.