At what time of year is sporadic-E propagation most likely to occur?
The correct answer is A: Around the solstices, especially the summer solstice. At what time of year is sporadic-E propagation most likely to occur is around the solstices, especially the summer solstice. Sporadic-E is most common around solstices, with summer solstice being peak. For amateur radio operators, this is important for sporadic-E operation. Understanding this helps when operating sporadic-E.
Exam Tip
Sporadic-E time of year = around solstices, especially summer solstice. Think 'S'poradic-'E' = 'S'ummer 'E'quator (solstice). Sporadic-E is most common around solstices, with summer solstice being peak. Not winter solstice, not equinoxes - just solstices, especially summer.
Memory Aid
"Sporadic-E time of year = around solstices, especially summer solstice. Think 'S'poradic-'E' = 'S'ummer 'S'olstice. Sporadic-E is most common around solstices, with summer solstice being peak. Important for sporadic-E operation."
Real-World Application
Sporadic-E propagation: It's most likely to occur around the solstices (June and December), especially the summer solstice (June). Sporadic-E activity peaks during summer months. This is the time of year - around solstices, especially summer solstice.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. Around solstices, especially winter solstice isn't correct - summer solstice is peak, not winter. Winter solstice isn't peak.
Option C: Incorrect. Around equinoxes, especially spring equinox isn't correct - sporadic-E is around solstices, not equinoxes. Equinoxes isn't the time.
Option D: Incorrect. Around equinoxes, especially fall equinox isn't correct - sporadic-E is around solstices, not equinoxes. Equinoxes isn't the time.
题目解析
The correct answer is A: Around the solstices, especially the summer solstice. At what time of year is sporadic-E propagation most likely to occur is around the solstices, especially the summer solstice. Sporadic-E is most common around solstices, with summer solstice being peak. For amateur radio operators, this is important for sporadic-E operation. Understanding this helps when operating sporadic-E.
考试技巧
Sporadic-E time of year = around solstices, especially summer solstice. Think 'S'poradic-'E' = 'S'ummer 'E'quator (solstice). Sporadic-E is most common around solstices, with summer solstice being peak. Not winter solstice, not equinoxes - just solstices, especially summer.
记忆口诀
Sporadic-E time of year = around solstices, especially summer solstice. Think 'S'poradic-'E' = 'S'ummer 'S'olstice. Sporadic-E is most common around solstices, with summer solstice being peak. Important for sporadic-E operation.
实际应用示例
Sporadic-E propagation: It's most likely to occur around the solstices (June and December), especially the summer solstice (June). Sporadic-E activity peaks during summer months. This is the time of year - around solstices, especially summer solstice.
错误选项分析
Option B: Incorrect. Around solstices, especially winter solstice isn't correct - summer solstice is peak, not winter. Winter solstice isn't peak. Option C: Incorrect. Around equinoxes, especially spring equinox isn't correct - sporadic-E is around solstices, not equinoxes. Equinoxes isn't the time. Option D: Incorrect. Around equinoxes, especially fall equinox isn't correct - sporadic-E is around solstices, not equinoxes. Equinoxes isn't the time.
知识点
Sporadic-E propagation, Time of year, Around solstices, Summer solstice
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.