The National Gravity Network
The National Gravity Network is a network of points distributed across the Kingdom's area where the values of Earth's gravity have been measured using both absolute and relative methods. The main objective of the National Gravity Network is to support geodetic activities related to the development and maintenance of vertical reference frames and geoid models for the Kingdom, and to provide data to users regarding activities related to Earth's gravity values, including determining flood flow paths, correcting leveling readings, and monitoring volcanic activity. (Including the attached image named “KSA-NGrN_Ar“) The National Gravity Network consists of the following elements: The National Absolute Gravity Network. The National Absolute Gravity Network was established to define the absolute value of gravity (gravity reference) and its gradient (calibration) using Earth's gravity values measured directly at the network stations with gravity value measurement techniques and devices. The National Absolute Gravity Network was established according to second-order/first-class standards according to the National Geodetic Survey (NGS) standards and consists of 41 stations where Earth's gravity values have been measured with an accuracy of 10 microgals.
The National Absolute Gravity Network The National Absolute Gravity
Network was established to define the absolute value of gravity (gravity reference) and its gradient (calibration) using Earth's gravity values measured directly at the network stations with gravity value measurement techniques and devices. The National Absolute Gravity Network was established according to second-order/first-class standards according to the National Geodetic Survey (NGS) standards and consists of 41 stations where Earth's gravity values have been measured with an accuracy of 10 microgals.
The National Relative Gravity Network
The National Relative Gravity Network was established for the purpose of densifying the absolute gravity measurements through the use of relative Earth's gravity value measurement techniques and devices. The National Relative Gravity Network was established according to the National Geodetic Survey (NGS) standards and consists of 3836 stations where Earth's gravity values have been measured with an accuracy better than 20 microgals.
Baseline for calibrating relative Earth gravity measuring devices
The baseline for calibrating relative Earth gravity measuring devices was established to provide calibration services for relative Earth's gravity value measurement techniques and devices. The baseline for calibrating relative Earth gravity measuring devices was established according to the National Geodetic Survey (NGS) standards and consists of 14 stations where Earth's gravity values have been measured with an accuracy better than 10 microgals.
