DB/T 98-2024 in English

VALID

Specifications for absolute gravity measurement

Issued on:2024-03-01
Implemented on:2024-09-01
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $460.00
$447.00

Standard No:	DB/T 98-2024
Document status:	VALID
Title in English:	Specifications for absolute gravity measurement
Title in Chinese:	绝对重力测量规范
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2024-03-01
Implemented on:	2024-09-01
ICS Classification:	91.120.25-Seismic and vibration protection
Chinese Classification:	P15-Engineering seismic resistance
Professional Classification:	DB-Provincial Standard
Related Topics:	Absolute Quantitative Standards gravity absolute quantum yield Absolute Molecular Weight Measurement Method Relative Atomic Mass Weight Absolute Quantitative 2 Duplicate Wells Relative Quantitative PCR Absolute Quantitative PCR pcr absolute quantification absolute atomic mass Absolute Molecular Weight Measurement Absolute Efficiency Measurement System convective gravity Absolute Quantitative Analysis How to measure absolute quantification by flow cytometry real-time quantification absolute quantification Quantitative PCR Absolute Quantification absolute meter Absolute Quantitative PCR Analysis gravity convection type absolute quantitative pcr Relative Quantitative PCR and Absolute Quantitative PCR absolute wavelength Relative qy vs Absolute qy Absolute Quantitative English Absolute Quantitative Aerosol Gravity Convection Absolute Quantitative Calculation Absolute error of indirect measurement Remeasurement Absolute Quantification vs. Relative Quantification force measurement absolute molecular weight qpcr absolute quantification Relative Atomic Mass and Weight Absolute Quantification of Fungi Relative Quantification and Absolute Quantification by Mass Spectrometry Absolute quantitation by mass spectrometry absolute gravity measurement Absolute quantification includes relative quantification The absolute mass of C gravity measurement Absolute quantitation by mass spectrometry qPCR absolute quantification absolute atomic mass of water Absolute quantification by qPCR Quantitative PCR Absolute Quantification and Relative Quantification Gene Absolute Quantification Quantitative Qualitative Absolute Quantitative Relative Quantitative Mass Spectrometry Absolute Quantification Relative Quantification Absolute Quantification and Relative Quantification by Mass Spectrometry xrf absolute content Absolute Quantitative R2 Requirements Absolute Quantitative PCR Relative Quantitative PCR Mass Spectrometry Relative and Absolute Quantification Absolute quantitative samples pcr absolute quantification and relative quantification Absolute Molecular Mass convective gravity pcr absolute quantification vs relative quantification absolute quantum yield absolute gravimeter convection and gravity pcr absolute quantification and relative quantification How to measure absolute atomic mass Absolutely Absolute Molecular Weight Detection absolute crystalline pair relative gravity measurement Absolute detection limit relative range absolute Absolute expression of u6 Absolute Quantum Efficiency Measurement Absolute Quantum Tester unit of gravity stress absolute error Quantitative PCR Absolute Quantification dna absolute quantification Absolute Count Quantitative Detection Mass Spectrometry Relative Quantification Absolute Quantification Nucleic acid absolute and relative quantification Gauges Absolute molecular weight testing agency force measurement Absolute molecular weight determination method

本文件规定了绝对重力测量的测点设计、建设、观测和资料归档等技术要求。
本文件适用于绝对重力测量，也可供其他行业或科学研究参考使用。

Introduction

Analysis of the core terminology system

Terminology	Definition	Measurement accuracy requirements
Gravity benchmark point	Gravity network starting benchmark control point	Better than 5.0×10⁻⁸m/s²
Gravity basic point	Control point determined by absolute/relative measurement	Better than 10.0×10⁻⁸m/s²
Gravity juxtaposition point	Absolute measurement points next to continuous gravity observation points	Synchronous benchmark point accuracy

Key technologies for measuring point construction

Environmental control standards

Vibration control: >500m from vibration source (airport runway/factory/construction site)
Electromagnetic shielding: ≥100m from high-voltage equipment
Geological stability: Avoid broken zones/settlement areas/groundwater level change areas

Markstone burial specifications

Markstone type	Size (mm)	Concrete strength
Soil layer point	1200×1200×1000	Above C25
Bedrock point	1200×1200×300	Cast integrally with bedrock

Observation data processing model

Solid tide correction example

G₀=9.80123456m/s² was measured at a certain reference point. After the solid tide correction δgₜ=-1.15×2.3×10⁻⁷m/s², the corrected value needs to be superimposed on the original observation data.

Correction term	Mathematical model	Typical correction magnitude
Ocean tide load	δgₒ=∬[H(θ,λ)ρ_wG(ψ)]dθdλ	10⁻⁸~10⁻⁷m/s²
Pole shift effect	δgₚ=-1.164×10⁸ω²asin2φ(xcosλ-ysinλ)	10⁻⁹m/s²

Implementation suggestions

Instrument selection: Prioritize the use of dual-frequency laser interferometer absolute gravimeter, with mutual verification of red and blue laser data
Observation sequence: The benchmark points must be observed continuously for 24 hours, with group intervals evenly distributed
Quality control nodes: The qualified rate of falling objects is ≥75%, and re-measurement is required when the number of invalid groups is ≤8