Abstract
The establishment of the BeiDou global navigation satellite system (BDS-3) has been completed, and the current constellation can independently provide positioning service globally. BDS-3 satellites provide quad-frequency signals, which can benefit the ambiguity resolution (AR) and high-precision positioning. This paper discusses the benefits of quad-frequency observations, including the precision gain of multi-frequency high-precision positioning and the sophisticated choice of extra-wide-lane (EWL) or wide-lane (WL) combinations for instantaneous EWL/WL AR. Additionally, the performance of EWL real-time kinematic (ERTK) positioning that only uses EWL/WL combinations is investigated. The results indicate that the horizontal positioning errors of ERTK positioning using ionosphere-free (IF) EWL observations are approximately 0.5 m for the baseline of 27 km and 1 m for the baseline of 300 km. Furthermore, the positioning errors are reduced to the centimetre level if the IF EWL observations are smoothed by narrow-lane observations for a short period.
| Original language | English |
|---|---|
| Article number | 30 |
| Journal | Satellite Navigation |
| Volume | 1 |
| Issue number | 1 |
| DOIs | |
| State | Published - Dec 2020 |
| Externally published | Yes |
Keywords
- Ambiguity resolution
- Extra-wide-lane combinations
- Precise point positioning
- Quad-frequency
- Real-time kinematic