“U-SB”是“Unified S-Band”的缩写，意思是“统一S波段”

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“USBE”是“Unified S-Band Equipment”的缩写，意思是“统

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“USBI”是“United Space Boosters, Inc.”的缩写，意思是

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“USBS”是“Unified S-Band System”的缩写，意思是“统

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“USC”是“United States Code”的缩写，意思是“美国法典”

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“USDA”是“United States Department of Agriculture”

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“USE”是“User Support Equipment”的缩写，意思是“用户

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“μSEC”是“MicroSECond”的缩写，意思是“微秒”

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“USGS”是“United States Geological Survey”的缩写，意

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“USI”是“Update Software Identity”的缩写，意思是“更

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