Time Delay Measurement of FAST Using Baseband Data and Periodic Noise
Time Delay Measurement of FAST Using Baseband Data and Periodic Noise
Ru-Rong Chen 1Yan Zhu 1Hai-Yan Zhang1
作者信息
- 1. National Astronomical Observatories, Chinese Academy of Sciences
- 折叠
摘要
We propose a method to measure the time delay of the Five-hundred-meter Aperture Spherical radio Telescope (FAST) using baseband data and periodic noise injection. By applying a sliding time window and calculating the average standard deviation ratio over 1000 noise cycles, high-precision measurement of the noise-induced time delay is achieved. The proposed method offers several advantages, including a short recording duration, high measurement accuracy, and strong immunity to electromagnetic interference. It enables effective monitoring of hardware state changes in the signal chain, and provides technical support for the future participation of the FAST in radio interferometry.
Abstract
We propose a method to measure the time delay of the Five-hundred-meter Aperture Spherical radio Telescope (FAST) using baseband data and periodic noise injection. By applying a sliding time window and calculating the average standard deviation ratio over 1000 noise cycles, high-precision measurement of the noise-induced time delay is achieved. The proposed method offers several advantages, including a short recording duration, high measurement accuracy, and strong immunity to electromagnetic interference. It enables effective monitoring of hardware state changes in the signal chain, and provides technical support for the future participation of the FAST in radio interferometry.关键词
FAST/baseband data/periodic noise/time delayKey words
FAST/baseband data/periodic noise/time delay引用本文复制引用
Ru-Rong Chen,Yan Zhu,Hai-Yan Zhang.Time Delay Measurement of FAST Using Baseband Data and Periodic Noise[EB/OL].(2026-09-28)[2026-10-01].https://chinaxiv.org/abs/202609.00503.学科分类
天文学
