Frequency Synthesis Approach to Determine Spacecraft Angular Position with Sub-nanoradian Accuracy

D. Bagri
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引用次数: 1

Abstract

This paper describes a possible approach to measuring angular position of a spacecraft with reference to a nearby calibration source (quasar) with an accuracy of a few tenths of a nanoradian using a very long baseline interferometer that measures the interferometer phase with a modest accuracy. It employs (1) radio frequency (RF) phase delay to determine the spacecraft position with a high precision, and (2) multiple group delay measurements using either frequency tones or telemetry signals at different frequency spacing to resolve ambiguity of the fringe (cycle) containing the direction of the spacecraft.
亚纳辐射精度航天器角位置的频率合成方法
本文描述了一种可能的方法,以参考附近的校准源(类星体)测量航天器的角位置,其精度为纳辐射度的十分之一,使用非常长的基线干涉仪,以适度的精度测量干涉仪相位。它采用(1)射频(RF)相位延迟以高精度确定航天器位置;(2)采用不同频率间隔的频率音调或遥测信号进行多组延迟测量,以解决包含航天器方向的条纹(周期)的模糊性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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