一、前言1.背景美国宇航局的空间和地球应用处(OSTA)正考虑通过一个航天飞机实验来论证钟和频率基准的全球高精度比对技术。该实验将包括一个放在航天飞机上的氢脉泽钟。发送微波和脉冲激光信号来进行航天飞机上的空间钟和地面站钟之间的比对。该实验的目的是验证时间传递的准确度为1ns 或更高,钟的频率比对准确度达到1×10~(-14)水平。以10~(-14)的准确度来 I. INTRODUCTION 1. Background NASA’s Space and Earth Applications Service (OSTA) is considering global precision alignment techniques that demonstrate clock and frequency references through a space shuttle experiment. The experiment will include a hydrogen maze bell placed on the shuttle. Send microwave and pulsed laser signals to align the Space Shuttle on the space shuttle with the ground station clock. The purpose of this experiment is to verify that the accuracy of time transmission is 1 ns or higher and the clock frequency alignment accuracy is 1 × 10 ~ (-14). With 10 ~ (-14) accuracy come