1. The ISS has a powerful signal, and handheld radios can also receive it. As long as the angle is correct and there are no obstructions in the location,
2. You can purchase a handheld radio and a phone recording cable, which allows for direct decoding. The phone can display both the tracking software interface and the decoding interface on its dual screens simultaneously.
3. You can use apps like "追星", Heavens-Above, and Look4Sat to update your ephemeris in advance.
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