What band is best suited for communicating via meteor scatter?
The correct answer is B: 6 meters. The 6-meter band is best suited for communicating via meteor scatter. Meteor scatter propagation occurs when radio signals are reflected off the ionized trails left by meteors entering Earth's atmosphere.
The 6-meter band (50-54 MHz) is in the optimal frequency range for meteor scatter. Higher frequencies (like 2 meters) work but require larger meteors. Lower frequencies (like 10 meters) work but are less efficient. 6 meters provides a good balance - the meteor trails are long enough and dense enough to effectively reflect 6-meter signals, making it the preferred band for meteor scatter communications. Contacts via meteor scatter are typically brief (seconds to minutes) as the meteor trail quickly dissipates.
Exam Tip
Meteor scatter = 6 meters. Remember: The 6-meter band is best suited for meteor scatter communications. It's in the optimal frequency range for reflecting off meteor trails.
Memory Aid
"**M**eteor **S**catter = **M**agic **S**ix meters (think 'MS = MS' = Magic Six meters)"
Real-World Application
You're operating on 6 meters and using meteor scatter to contact a station 800 miles away. You both point your antennas in the right direction and wait. When a meteor enters the atmosphere and creates an ionized trail, your signals bounce off the trail for a few seconds, allowing a brief contact. This works best on 6 meters because the meteor trails are the right size to effectively reflect 6-meter signals.
FCC Part 97.303Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. 33 centimeters (around 900 MHz) is too high for effective meteor scatter. The meteor trails don't effectively reflect such high frequencies.
Option C: Incorrect. 2 meters works for meteor scatter but is less optimal than 6 meters. Larger meteors are needed for 2-meter meteor scatter.
Option D: Incorrect. 70 centimeters works for meteor scatter but is less optimal than 6 meters. 6 meters is the preferred band.
题目解析
The correct answer is B: 6 meters. The 6-meter band is best suited for communicating via meteor scatter. Meteor scatter propagation occurs when radio signals are reflected off the ionized trails left by meteors entering Earth's atmosphere. The 6-meter band (50-54 MHz) is in the optimal frequency range for meteor scatter. Higher frequencies (like 2 meters) work but require larger meteors. Lower frequencies (like 10 meters) work but are less efficient. 6 meters provides a good balance - the meteor trails are long enough and dense enough to effectively reflect 6-meter signals, making it the preferred band for meteor scatter communications. Contacts via meteor scatter are typically brief (seconds to minutes) as the meteor trail quickly dissipates.
考试技巧
Meteor scatter = 6 meters. Remember: The 6-meter band is best suited for meteor scatter communications. It's in the optimal frequency range for reflecting off meteor trails.
记忆口诀
**M**eteor **S**catter = **M**agic **S**ix meters (think 'MS = MS' = Magic Six meters)
实际应用示例
You're operating on 6 meters and using meteor scatter to contact a station 800 miles away. You both point your antennas in the right direction and wait. When a meteor enters the atmosphere and creates an ionized trail, your signals bounce off the trail for a few seconds, allowing a brief contact. This works best on 6 meters because the meteor trails are the right size to effectively reflect 6-meter signals.
错误选项分析
Option A: Incorrect. 33 centimeters (around 900 MHz) is too high for effective meteor scatter. The meteor trails don't effectively reflect such high frequencies. Option C: Incorrect. 2 meters works for meteor scatter but is less optimal than 6 meters. Larger meteors are needed for 2-meter meteor scatter. Option D: Incorrect. 70 centimeters works for meteor scatter but is less optimal than 6 meters. 6 meters is the preferred band.
知识点
Meteor scatter, 6-meter band, Meteor trails, Propagation
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.