Related Experiment Video
Updated: Mar 23, 2026
06:52
An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field
Published on: May 26, 2020
8.8K
GNSS Precise Kinematic Positioning for Multiple Kinematic Stations Based on A Priori Distance Constraints
Kaifei He1,2, Tianhe Xu3,4, Christoph Förste5
1School of Geosciences, China University of Petroleum (East China), Qingdao 266580, China. kfhe@upc.edu.cn.
Sensors (Basel, Switzerland)
|April 5, 2016
Summary
This study enhances Global Navigation Satellite System (GNSS) kinematic positioning accuracy for gravimetry by using fixed antenna distances as constraints. This method improved positioning precision, particularly for airborne and shipborne applications.
Area of Science:
- Geodesy and Geophysics
- Satellite Navigation Systems
Background:
- Precise kinematic positioning is crucial for airborne and shipborne gravimetry.
- Multiple Global Navigation Satellite System (GNSS) antennas are often mounted on kinematic platforms, with fixed inter-antenna distances.
Purpose of the Study:
- To improve the accuracy and reliability of kinematic positioning for gravimetry using GNSS.
- To integrate known, invariant distances between multiple GNSS antennas as a priori constraints in state parameter adjustment.
Main Methods:
- Applied known inter-antenna distances as a priori constraints in the state parameter adjustment process.
- Accounted for the accuracy of these distance constraints during adjustment.
- Validated the approach using GNSS data from a Baltic Sea shipborne gravimetric campaign.
Main Results:
- The application of distance constraints significantly improved the accuracy of GNSS kinematic positioning.
- Demonstrated an improvement of approximately 4 mm for the radial component in positioning accuracy.
Conclusions:
- Integrating fixed inter-antenna distances as constraints is an effective method to enhance GNSS kinematic positioning for gravimetry.
- This approach offers improved accuracy and reliability for airborne and shipborne gravimetric surveys.
Related Concept Videos
01:30Types of Global Positioning System Surveys
422
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
422
01:15Kinematic Equations: Problem Solving
29.7K
When analyzing one-dimensional motion with constant acceleration, the problem-solving strategy involves identifying the known quantities and choosing the appropriate kinematic equations to solve for the unknowns. Either one or two kinematic equations are needed to solve for the unknowns, depending on the known and unknown quantities. Generally, the number of equations required is the same as the number of unknown quantities in the given example. Two-body pursuit problems always require two...
29.7K
01:17Kinematic Equations - II
15.7K
The second kinematic equation expresses the final position of an object in terms of its initial position, the distance traveled with the initial constant velocity, and the distance traveled due to a change in velocity. Similar to the first kinematic equation, this equation is also only valid when the acceleration is constant throughout the motion of an object.
Suppose a car merges into freeway traffic on a 200 m long ramp. If its initial velocity is 10 m/s and it accelerates at 2 m/s2, then the...
Suppose a car merges into freeway traffic on a 200 m long ramp. If its initial velocity is 10 m/s and it accelerates at 2 m/s2, then the...
15.7K
01:18Kinematic Equations - III
12.4K
The first two kinematic equations have time as a variable, but the third kinematic equation is independent of time. This equation expresses final velocity as a function of the acceleration and distance over which it acts. The fourth kinematic equation does not have an acceleration term and provides the final position of the object at time t in terms of the initial and final velocities. This equation is useful when the value of the constant acceleration is unknown.
Using the kinematic equations,...
Using the kinematic equations,...
12.4K
01:26Errors in Global Positioning System
394
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
394
01:26Kinematic Equations - I
17.3K
When an object moves with constant acceleration, the velocity of the object changes at a constant rate throughout the motion. The kinematic equations of motions are derived for such cases where the acceleration of the object is constant. The first kinematic equation gives an insight into the relationship between velocity, acceleration, and time. We can see, for example:
17.3K