GB/T 16789-2019 English PDF

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GB/T 16789-2019: Specifications of the baseline measurements
Status: Valid

GB/T 16789: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 16789-2019	599	Add to Cart	5 days	Specifications of the baseline measurements	Valid
GB 16789-1997	879	Add to Cart	5 days	Specifications of the baseline measurements	Obsolete

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Basic data

Standard ID: GB/T 16789-2019 (GB/T16789-2019)
Description (Translated English): Specifications of the baseline measurements
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A76
Classification of International Standard: 07.040
Word Count Estimation: 30,315
Date of Issue: 2019-03-25
Date of Implementation: 2019-10-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 16789-2019: Specifications of the baseline measurements

---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.
Specifications of the baseline measurements ICS 07.040 A76 National Standards of People's Republic of China Replace GB 16789-1997 Longer baseline measurement specification Published on.2019-03-25 2019-10-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Basic requirements for long baseline fields 2 4.1 Precision requirements 2 4.2 Stability requirements 2 4.3 Design Requirements 2 5 than long baseline field site selection and embedding 2 5.1 Location Principle 2 5.2 buried stone 3 6 Calibration of measuring instruments 3 6.1 Invalid baseline rule 3 6.2 Invar compensation test 4 6.3 Verification of level, leveling ruler and theodolite 4 6.4 Calibration of the temperature meter 4 7 measurements over long baselines 4 7.1 Integral shaft frame 4 7.2 Axle head leveling 5 7.3 Length measurement 6 8 Record of measurement data 7 8.1 Recording method 7 8.2 Record item 7 8.3 Recording Requirements 7 8.4 Recording and inspection 8 9 Measurement data processing 8 9.1 Invar baseline length 8 9.2 segment length calculation 8 9.3 Calculation of the final length of each segment 8 9.4 Baseline full length calculation 9 9.5 Accuracy Estimation 9 9.6 Uncertainty assessment 10 10 Data collection and retesting 10 10.1 Data Sorting 10 10.2 Retest 10 Appendix A (informative) Designed over long baseline segments 11 Appendix B (Normative Appendix) Ground Mark Style 12 Appendix C (normative appendix) Observation pier, bedrock pile style 13 Appendix D (informative appendix) Field comparison of Invar baseline and patching feet 15 Appendix E (informative) The base length of the Invar used to calculate the baseline Table 17 Appendix F (informative appendix) Appendix G (informative) The final length of each segment is calculated 19 Appendix H (informative) Accuracy estimate 20 Appendix I (informative) Comparison of measurement uncertainty over long baseline field 21

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB 16789-1997 "Specific Long Baseline Measurement Specification". Compared with GB 16789-1997, the main changes are as follows. --- Modified the format of the original standard according to GB/T 1.1-2009; --- Increased site and observation pier stability monitoring requirements and indicators, and defined indicators than the horizontal deviation of the long baseline field; --- Added a chapter on the measurement of measurement data, and made provisions for recording methods, projects, requirements and inspections; --- According to JJG306 to modify the rules of the inspection of the inch; --- Revised the inspection content of the level gauge and the leveling ruler, and added reference documents; --- Removed E5 from the original accuracy assessment; --- Removed the original Appendix H tilt correction calculation (for 24m Invar line ruler); --- The appendix newly added the 6m compensation scale comparison calculation and the uncertainty of the long baseline field measurement uncertainty evaluation. This standard was proposed by the Ministry of Natural Resources of the People's Republic of China This standard is under the jurisdiction of the National Geographic Information Standardization Technical Committee (SAC/TC230). This standard was drafted. National Surveying and Mapping Geographic Information Bureau Surveying and Mapping Standardization Institute, the first geodetic survey team of the National Surveying and Mapping Geographic Information Bureau. The main drafters of this standard. Xiao Xuenian, Guo Zanfeng, Chen Zhen, Zhang Kun, Yan Jingxin. The previous versions of the standards replaced by this standard are. ---GB 16789-1997. Longer baseline measurement specification

1 Scope

This standard specifies the basic requirements, site selection and embedding of the long baseline field, verification of measuring instruments, measurement methods, measurement data records, and Measurement data processing, data collation and retesting requirements. This standard applies to the design, construction, measurement and accuracy assessment of long baseline fields.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. CH/T.2004 Basic requirements for measuring external electronic records CH/T.2006 Leveling Electronic Recording Regulations JJG8 level ruler JJG306 24m Inwa baseline ruler JJG414 optical theodolite JJG425 level JJG703 photoelectric range finder JJG966 Handheld Laser Range Detector Verification Procedure

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Than the long baseline field standardbaselinefield It consists of a number of landmarks located on a straight line, and the distance between adjacent points is traced back to the national length reference. Note. It is used to verify the length measurement standard of measuring instruments such as total station, photoelectric range finder and GNSS receiver. It belongs to the national line number value transmission system. And other standard line gauges. 3.2 Invar baseline ruler invarwire A wire or tape ruler made of Invar alloy having a temperature coefficient of linear expansion of less than 0.5 x 10-6 ° C-1 is used. Note. It is used for precision distance measurement and belongs to the second-class standard gauge in the national line value transmission system. 3.3 Span span The distance between two adjacent shaft heads or measuring points. Note. The length is approximately equal to the measured base length of the Invar baseline. 3.4 Catenary asymmetry correction asymmetrycatenarycorrection In the baseline measurement, the length correction caused by the asymmetry of the catenary formed by the two adjacent shaft heads is not equal. ......

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