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GB/T 42557-2023 English PDF

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US$359.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 42557-2023: Technical specifications of electromagnetic environmental protection for radio telescopes
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42557-2023	359	Add to Cart	4 days	Technical specifications of electromagnetic environmental protection for radio telescopes	Valid

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Basic data

Standard ID: GB/T 42557-2023 (GB/T42557-2023)
Description (Translated English): Technical specifications of electromagnetic environmental protection for radio telescopes
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: M35
Classification of International Standard: 07.040
Word Count Estimation: 17,174
Date of Issue: 2023-05-23
Date of Implementation: 2023-12-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42557-2023: Technical specifications of electromagnetic environmental protection for radio telescopes

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 07:040 CCSM35 National Standards of People's Republic of China Technical specification for radio telescope electromagnetic environment protection radiotelescopes Released on 2023-05-23 2023-12-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions, Abbreviations 1 3:1 Terms and Definitions 1 3:2 Abbreviations 2 4 Electromagnetic environment protection technical requirements 2 4:1 Protection threshold 2 4:2 Allowable Data Loss 2 5 Spectrum sharing methods 2 6 Electromagnetic environment protection measurement conditions 2 6:1 Measurement environment 2 6:2 Measuring equipment 2 7 Electromagnetic environment protection measurement method 3 7:1 Measurement frequency range 3 7:2 Measurement method 3 7:3 Measurement report 4 Appendix A (Informative) Calculation Method of Harmful Interference Protection Threshold for Radio Telescope 5 Appendix B (informative) Radio telescope spectrum sharing method 10 Appendix C (Informative) Calculation Method for Sensitivity of Electromagnetic Environment Measurement System 11 Reference 13

foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting: Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed and managed by the National Radio Interference Standardization Technical Committee (SAC/TC79): This document was drafted by: National Astronomical Observatory of Chinese Academy of Sciences, National Radio Monitoring Center, Guizhou Radio Monitoring Station: The main drafters of this document: Zhang Haiyan, Zhang Xiang, Huang Jia, Hu Hao, Huang Shijie, Gan Hengqian, Li Anping, Cui Xiaoman, Qian Zhaojun, Mo Kaiwei, Wang Yu: Technical specification for radio telescope electromagnetic environment protection

1 Scope

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

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document: GB/T 6113:101 Radio Disturbance and Immunity Measuring Equipment and Measurement Methods Specification Part 1-1: Radio Disturbance and Immunity Measuring equipment Measuring equipment 3 Terms and definitions, abbreviations 3:1 Terms and Definitions The following terms and definitions apply to this document: 3:1:1 wireless radio A generic term used for radio waves: 3:1:2 Include a specific frequency band in the frequency allocation table, stipulating that the frequency band can be used for one or more terrestrial or space wireless networks under specified conditions: used by the telecommunications service or the radio astronomy service: 3:1:3 radio astronomy radioastronomy Astronomy based on the reception of radio waves originating in the universe: 3:1:4 Harmful interference harmful interference Endanger the normal operation of radio navigation or other safety services, or seriously impair, hinder or repeatedly interrupt unmanned Interference with radio communications services: 3:1:5 spectrum sharing The state in which two or more radio services use the radio spectrum in the same frequency range: 3:1:6 power densitypower density Transmitted power per unit area in a cross-section perpendicular to the direction of propagation of electromagnetic waves: ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 42557-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 42557-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 42557-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 42557-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.