Dynamic Tracking Experimental Research of Adjusting System for the Subreflector of 65 Meters Radio Telescope

Yuchao, Dou; Hou, Yulei; Hang, Dong; Yao, Jiantao; Zhao, Yongsheng

doi:10.2991/mems.2012.136

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Description Of Misell Algorithm and Phase Factor1

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“…In addition, the actuator of the main reflector has a higher positioning accuracy. The positioning error of the subreflector of the TM-65m is 50 μm [25]. The positioning errors of actuators of TM-65m and GBT-100m are 15 and 25 μm, respectively [26].…”

Section: Description Of Misell Algorithm and Phase Factormentioning

confidence: 99%

Study on the phase factor of phase retrieval algorithm for surface diagnosis of large reflector antennas

Liu

Meng

2017

IET Microwaves, Antennas & Propagation

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Surface diagnosis methods based on phase retrieval algorithm have been successfully applied to many large reflector antennas. In the phase retrieval algorithm, surface distortion is retrieved by multiple far field patterns. The different far field patterns are connected to each other by an important element called ‘phase factor’. This study investigates the effect of the phase factor on the phase retrieval algorithm. Generally, the phase factor is simple for the phase retrieval algorithm. In this study, a new method based on the active surface system is proposed to produce more flexible and diverse phase factors. Through digital simulations, the effect of different kinds of phase factors on the phase retrieval algorithm is discussed. In addition, the inaccuracy of the phase factor caused by the mechanism error is considered.

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Section: Description Of Misell Algorithm and Phase Factormentioning

confidence: 99%