ГЭТ 190-2023 (НИО 253)
Standard name:
- ГЭТ 190-2023 ГПСЭ units of acceleration in gravimetry
Type of measurement:
- Measurements of mechanical quantities
Structural division: name НИО\НИЛ:
- Research Department of Standards in the Fields of Measurement of Motion Parameters, Torque, Force and Gravimetry
Guardian Scientist:
- Orlov Oleg Alexandrovich
Year of creation:
- 2011
Year of re-confirmation:
- 2023
Operating principle:
The standard's operating principle is based on the use of absolute and relative gravimeters to accurately measure the acceleration due to gravity.
The standard includes several gravimetric stations equipped with modern equipment, which ensures:
- High measurement accuracy and reliability,
- The ability to perform comprehensive gravimetric studies.
Composition of the standard:
The primary special standard consists of the following technical means:
1.1 Absolute ballistic gravimeter "ABG-VNIIM-2", consisting of:
- A ballistic unit, including an electromechanical system with a test body placed in a vacuum chamber with an ion pump, which is located on the support table;
- An interferometer with a vibration isolation system for the reference reflector;
- A frequency-stabilized laser;
- A rubidium frequency standard;
- An electronic system for recording interference fringes;
- An electronic control unit for the electromechanical system;
- An ion pump power supply;
- A computer with a program for controlling the electromechanical system and processing the measurement results.
1.2 Absolute ballistic gravimeter "ABG-Grot-1" No. 1, consisting of:
- A ballistic unit, including an electromechanical system with a test body, placed in a vacuum chamber with an ion pump, which is located on a support table;
- A laser interferometer;
- A vibration isolation system for the support reflector;
- Frequency-stabilized laser;
- The RBAE.402133.001 electronic unit, including a rubidium frequency standard, a control unit for the electromechanical system and interference fringe recording system, and a control unit for the stabilized laser.
- Ion pump power supply;
- A computer with software for controlling the electromechanical system and processing measurement results;
- A vacuum chamber pre-evacuation system with a vacuum meter.
1.3 Scintrex CG6 Autograv Relative Gravimeter, Registration No. 77100-19, Factory No. 20090283
1.4 Lomonosov-1 Gravimetric Station with Seven Gravimetric Stations (Building No. 3, Letter U, Room K3) at the Lomonosov Branch of the D.I. Mendeleyev All-Russian Scientific Research Institute of Metrology (VNIM);
1.5 Lomonosov-2 Gravimetric Station with Five Gravimetric Stations (Building PZL0, Letter O) at the Lomonosov Branch of the D.I. Mendeleyev All-Russian Scientific Research Institute of Metrology (VNIM);
Main metrological characteristics
| Metrological characteristic | Value |
|---|---|
| Range of gravitational acceleration values where the unit is reproduced | 9.77 to 9.85 m s-2 |
| Nominal gravitational acceleration value where the unit is reproduced | 9.82 m s-2 |
| Standard deviation of the measurement result (when performing 20 series of 100 independent measurements each), no more than | 2 x 10-8 m s-2 (2 μGal) |
| Unexcluded systematic error, no more than | 1.8 x 10-8 m s-2 (1.8 μGal) |
| Standard uncertainty: Type A; Type B estimated; | 2 x 10-8 m s-2 (2 μGal) 0.8 x 10-8 m s-2 (0.8 μGal) |
| Combined standard uncertainty | 2.1 x 10-8 m s-2 (2.1 μGal) |
| Expanded uncertainty (at k = 2) | 4.2 x 10-8 m s-2 (4.2 μGal) |
| Intertest interval | 1 year |
Verification diagram:
- Heads the state verification scheme for gravity acceleration measuring instruments
Scope of application:
- Metrological support for the global positioning system (GLONASS)
- ensuring accurate geoid height determination, colocation of geometric measurement instruments and USP measurements (e.g., at KVAZAR system points)
- Fundamental research
- Data for analysis and obtaining patterns in geodesy as a science of the Earth's shape, rotation parameters, and gravitational field, as well as their changes over time, including for refining the theoretical model of tidal variations in the gravitational field.
- Gravimetric support for navigation systems
- Accuracy in navigational solutions is achieved by using inertial systems, as well as correction systems using global positioning systems and systems that utilize physical field parameters. When satellite navigation system (GNSS) signals are unavailable or blocked, the Earth's gravitational field (EGF) is virtually the only reliable source of navigational systems.
- Applied Geophysical Research
- For the benefit of geology (mineral exploration), engineering geology, underground cavity exploration, hydrology. Environmental safety (volcanology, seismology, global geodynamics).
- Metrology
- Force measurements, UF measurements during the implementation of the new definition of the kilogram using watt-scales.
- Metrological support for measurements of mass, pressure, and other quantities.
The total number of measuring instruments traceable to ГЭТ 190-2023:
Not specified
Ensuring the uniformity of measurements, participation in the CIPM MRA program:
No comparisons were conducted