What is a space telecommand station?
The correct answer is B: An amateur station that transmits communications to initiate, modify, or terminate functions of a space station. What a space telecommand station is an amateur station that transmits communications to initiate, modify, or terminate functions of a space station. Space telecommand stations send commands to space stations. For amateur radio operators, this is important for satellite operation. Understanding this helps when working with satellites.
Exam Tip
Space telecommand station = station that transmits communications to initiate/modify/terminate functions of space station. Think 'S'pace 'T'elecommand = 'S'ends 'T'elecommands to space. Space telecommand stations send commands to space stations. Not Earth station, not space station, not telemetry receiving - just command transmission to space.
Memory Aid
"Space telecommand station = station that transmits communications to initiate/modify/terminate functions of space station. Think 'S'pace 'T'elecommand = 'S'ends 'T'elecommands. Space telecommand stations send commands to space stations. Important for satellite operation."
Real-World Application
A space telecommand station: It's an amateur station on Earth that transmits communications (commands) to a space station to initiate, modify, or terminate functions. For example, you might send a command to turn on a satellite's transponder or change its operating mode. This is what a space telecommand station is - it sends commands to space stations.
FCC Part 97.3Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Station on Earth for communication with other Earth stations via satellites is an Earth station, not a space telecommand station - telecommand sends commands, not general communication. Earth station isn't telecommand.
Option C: Incorrect. Station located in satellite or balloon above 50 km is a space station, not a space telecommand station - telecommand is on Earth, not in space. Space station isn't telecommand.
Option D: Incorrect. Station that receives telemetry from satellite/balloon is a telemetry receiving station, not a space telecommand station - telecommand sends commands, not receives telemetry. Telemetry receiving isn't telecommand.
题目解析
The correct answer is B: An amateur station that transmits communications to initiate, modify, or terminate functions of a space station. What a space telecommand station is an amateur station that transmits communications to initiate, modify, or terminate functions of a space station. Space telecommand stations send commands to space stations. For amateur radio operators, this is important for satellite operation. Understanding this helps when working with satellites.
考试技巧
Space telecommand station = station that transmits communications to initiate/modify/terminate functions of space station. Think 'S'pace 'T'elecommand = 'S'ends 'T'elecommands to space. Space telecommand stations send commands to space stations. Not Earth station, not space station, not telemetry receiving - just command transmission to space.
记忆口诀
Space telecommand station = station that transmits communications to initiate/modify/terminate functions of space station. Think 'S'pace 'T'elecommand = 'S'ends 'T'elecommands. Space telecommand stations send commands to space stations. Important for satellite operation.
实际应用示例
A space telecommand station: It's an amateur station on Earth that transmits communications (commands) to a space station to initiate, modify, or terminate functions. For example, you might send a command to turn on a satellite's transponder or change its operating mode. This is what a space telecommand station is - it sends commands to space stations.
错误选项分析
Option A: Incorrect. Station on Earth for communication with other Earth stations via satellites is an Earth station, not a space telecommand station - telecommand sends commands, not general communication. Earth station isn't telecommand. Option C: Incorrect. Station located in satellite or balloon above 50 km is a space station, not a space telecommand station - telecommand is on Earth, not in space. Space station isn't telecommand. Option D: Incorrect. Station that receives telemetry from satellite/balloon is a telemetry receiving station, not a space telecommand station - telecommand sends commands, not receives telemetry. Telemetry receiving isn't telecommand.
知识点
Space telecommand station, Transmits communications, Initiate, modify, or terminate, Space station
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.