GB/T 42557-2023 (English Version)

Standard No.: GB/T 42557-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 42557-2023

Scope: This document specifies the requirements for electromagnetic environment protection of radio telescopes and describes the measurement methods of the electromagnetic environment of radio astronomy ground-based observation stations. This document is applicable to the electromagnetic environment measurement during the site selection, construction, operation and maintenance of radio astronomy ground-based observation stations.

Introduction

1. Background and significance of standard formulation

With the rapid development of radio technology, radio telescopes are facing increasing threats of electromagnetic interference. The formulation of GB/T 42557-2023 aims to provide a scientific and technical basis for radio astronomical observations and ensure the accuracy and reliability of observation data.

2. Comparison of standard frameworks

Standard chapters	Main content	Differences from other electromagnetic environment standards
Radio telescope	Applicable to site selection, construction, operation and maintenance stages	Designed for interference protection requirements for high-sensitivity astronomical observations
4.1 Protection threshold	Harmful interference threshold values are specified separately for continuous spectrum and spectral line observation modes	Differentiated protection standards are set for different business types

3. Interpretation of technical requirements

class='instrument'>The technical requirements for electromagnetic environment protection of radio telescopes mainly involve:

Protection threshold: Ensure that the received noise power is within the allowable range to prevent data loss.

Spectrum sharing method: Achieve compatibility with other radio services through geographical isolation, time separation and other means.

4. Implementation suggestions

Practical application case analysis

During the site selection stage, a radio observatory conducted electromagnetic environment measurements in strict accordance with standard requirements to ensure that the measurement equipment complies with the provisions of GB/T6113.101, and optimized the antenna polarization mode and gain. By implementing geographical isolation measures, interference was successfully reduced to the lowest level.

GB/T 42557-2023 Referenced Document

GB/T 6113.101 Specification for radio disturbance and immunity measuring apparatus and methods—Part 1-1: Radio disturbance and immunity measuring apparatus—Measuring apparatus

GB/T 42557-2023 history
2023 GB/T 42557-2023 Technical specification for radio telescope electromagnetic environment protection