A Delay Calibration for Chinese Spectral Radioheliograph in the Decimetric to Centimetric Wave Range

LIU Dong-hao; YAN Yi-hua; ZHAO An; WANG Wei

doi:10.3969/j.issn.0372-2112.2013.03.025

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A Delay Calibration for Chinese Spectral Radioheliograph in the Decimetric to Centimetric Wave Range

更新时间：2025-07-16

- A Delay Calibration for Chinese Spectral Radioheliograph in the Decimetric to Centimetric Wave Range
- Acta Electronica Sinica Vol. 41, Issue 3, Pages: 570-574(2013)
- 作者机构：
  
  1. 中国科学院国家天文台,北京,100012
  2. 中国科学院研究生院,北京,100049
  3. 中国科学院太阳活动重点实验室,北京,100012
  4. 中国科学院国家天文台,北京,100012
  5. 中国科学院研究生院,北京,100049
  6. 中国科学院太阳活动重点实验室,北京,100012
- 作者简介：
- 基金信息：
  
  National Major Research Equipment Development project (No.ZDYZ2009-3);National Natural Science Foundation of China (No.11003028)
- DOI：10.3969/j.issn.0372-2112.2013.03.025
  CLC： TN911.23
- Published：2013
- 稿件说明：
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LIU Dong-hao, YAN Yi-hua, ZHAO An, et al. A Delay Calibration for Chinese Spectral Radioheliograph in the Decimetric to Centimetric Wave Range[J]. Acta Electronica Sinica, 2013, 41(3): 570-574.
DOI：

LIU Dong-hao, YAN Yi-hua, ZHAO An, et al. A Delay Calibration for Chinese Spectral Radioheliograph in the Decimetric to Centimetric Wave Range[J]. Acta Electronica Sinica, 2013, 41(3): 570-574. DOI： 10.3969/j.issn.0372-2112.2013.03.025.

摘要

射电日像仪是采用综合孔径方法成像

具有高时间、高空间和高频率分辨率的太阳专用射电望远镜.为了使信号相关值准确

需要精确测量系统的延时

在太阳成像相关前扣除

消除消调函数对可见度函数值的影响.同时延时的测量精度影响数字补偿精度、图像信噪比等信息

是其成像质量的关键

也是超宽频带和高时间分辨率情况下研制和实施的难点.本文研究了应用于我国在建的厘米——分米波射电日像仪

以太阳为校准源

闭合差方法得到系统延时差

并通过试验验证

得到优于1ns补偿精度.

Abstract

The Chinese Spectral Radioheliograph (CSRH) is a solar-dedicated radio interferometric array that will produce high spatial resolution

high time resolution and high frequency resolution images of the sun simultaneously in cm-dm wave range.The quality of the calibration is the key for imaging especially for the case of ultra-wideband

high time resolution and frequency resolution in design and implementation.In this paper

we choose the sun as calibration source and calculate the delay for different geographical latitude and longitude.As a result

the delay accuracy that we got is better than 1ns.

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Related Institution

School of Electronical and Mechanical EngineeringXidian UniversityXi'anShaanxi 710071China

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