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Robust Analysis of Network-Based Real-Time Kinematic for GNSS-Derived Heights
Tae-Suk Bae1, Dorota Grejner-Brzezinska2, Gerald Mader3
1Department of Geoinformation Engineering, Sejong University, Seoul 143-747, Korea. baezae@sejong.ac.kr.
Sensors (Basel, Switzerland)
|October 31, 2015
Summary
New guidelines are needed for real-time (RT) network-based solutions supporting Global Navigation Satellite System (GNSS) heights. Network RTK solutions showed potential bias based on environment but were reliable with longer base stations and occupation times.
Area of Science:
- Geodesy
- Satellite Navigation
- Geomatics Engineering
Background:
- Real-time (RT) network-based solutions are crucial for Global Navigation Satellite System (GNSS) derived heights.
- Existing methods require updated guidelines and procedures for improved accuracy and reliability.
Purpose of the Study:
- To analyze the performance of network-based real-time kinematic (RTK) solutions.
- To evaluate the impact of environmental factors, baseline lengths, and antenna types on height estimation accuracy.
- To investigate the influence of occupation time on network RTK solution quality.
Main Methods:
- Conducted experiments using newly installed test marks and existing GPS benchmarks.
- Analyzed RTK solutions categorized into single-base RTK, multiple-epoch network RTK (mRTN), and single-epoch network RTK (sRTN).
- Assessed the effect of varying baseline lengths, antenna types, and occupation times on height accuracy and reliability.
Main Results:
- RTK solutions exhibited environmental bias up to 9 mm, but no significant bias was observed with a 30 km reference base station.
- Occupation time did not introduce explicit bias, though longer durations yielded smoother results.
- Investigated potential biases related to different durations and the feasibility of single-epoch solutions.
Conclusions:
- Network RTK solutions require careful consideration of environmental factors for precise height determination.
- Longer reference base stations and occupation times contribute to more reliable and smoother height estimations.
- Further research is recommended on occupation time variations and the application of single-epoch solutions for precise GNSS heighting.
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