# RTKLIB-B2b

**Repository Path**: liu-chunbobo/RTKLIB-B2b

## Basic Information

- **Project Name**: RTKLIB-B2b
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 1
- **Created**: 2025-04-08
- **Last Updated**: 2026-04-01

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# RTKLIB-B2b
An open-source C/C++ toolkit that extends the functionalities of RTKLIB, specifically designed to decode proprietary binary PPP-B2b correction streams and associated navigation messages from prevalent GNSS receivers, and to integrate the decoded corrections for precise point positioning (PPP) using the BeiDou Navigation Satellite System (BDS) PPP-B2b service.

## 🚀 Core Features

### PPP-B2b Decoding
- ​**Receiver Support**
  - ComNav Technology (ComNav) receivers (e.g. K803W)
  - Unicore Communications (Unicore) receivers (e.g. UM980)
  
- ​**Decoded Data**
  - Proprietary binary PPP-B2b correction streams
  - GPS Legacy Navigation (LNAV) messages
  - BDS B1C signal NAV messages (B-CNAV1)
  
- ​**Operation Modes**
  - Real-time decoding
  - Post-processing decoding
  
- ​**Output Format**
  - Extended, BKG Ntrip Client (BNC)-compatible ASCII format

### PPP Positioning
- ​**Positioning Modes**
  - Real-time positioning
  - Post-processing positioning
  
- ​**Satellite Systems**
  - BDS-only mode
  - GPS+BDS combined mode
  
- ​**Positioning Accuracy**
  - Decimeter-level PPP using PPP-B2b corrections

## 🌍 Cross-Platform Support
| Platform       | Real-time | Embedded Platforms  | Recommended Usage            |
|----------------|-----------|---------------------|------------------------------|
| ​**Linux**      | ✔️         | Rk3566, Imx6ull     | Realtime and Post-processing |
| ​**Windows**    | ✔️         | -                   | Post-processing only         |

> 💡 ​**Recommendation**: For best real-time performance, use Unix-like systems (Linux) especially for console-based operations.

## 📊 GNSS Datasets for RTKLIB-B2b

### Complementary Datasets for PPP Research & Validation
This collection supports two key application scenarios: ​**real-time playback simulation** and ​**post-processing analysis** of PPP-B2b corrections. Both datasets are archived on Zenodo:

#### a. Real-time Playback Dataset
**Purpose**: Simulate real-time streams using authentic receiver outputs  
**Equipment**:  
- Receivers: SinoGNSS K803W & Unicore UM980  
- Antenna: CNT AT360  
**Location**: APM Building 1 Rooftop (Wuhan, China)  
**Coverage**:  
- Time: DOY 080-082, 2025 (Mar 21-23, 2025)  
- Data: Raw binary logs (SINO/UNICORE formats)  

🔗 [Download on Zenodo](https://doi.org/10.5281/zenodo.15105929)

#### b. Post-processing Analysis Dataset
**Components**:  
- 1 Hz MGEX observations (gamg, ulab, wuh2)  
- DLR (German Aerospace Center) broadcast ephemeris  
- Unicore PPP-B2b corrections  
**Coverage**:  
- Observations: DOY 065-067, 2025 (Mar 6-8)  
- Ephemeris/Corrections: DOY 065-068, 2025 (Mar 6-9)  

🔗 [Download on Zenodo](https://doi.org/10.5281/zenodo.15110885)

**Usage Recommendations**:  
1. Dataset 1 for testing real-time module via `--playback` mode  
2. Dataset 2 for post-processing validation with precise reference  

## 📄 Citation

If you use RTKLIB-B2b in your research, please cite our paper:

> Liu C, et al. RTKLIB-B2b: Open-source Real-Time Decoding Module for BDS-3 PPP-B2b in RTKLIB. *Measurement Science and Technology*, 2026.  
> DOI: [10.1088/1361-6501/ae58c8](https://doi.org/10.1088/1361-6501/ae58c8)

```bibtex
@article{liu2026rtklib_b2b,
  title={RTKLIB-B2b: Open-source Real-Time Decoding Module for BDS-3 PPP-B2b in RTKLIB},
  author={Liu, Chunbo and others},
  journal={Measurement Science and Technology},
  year={2026},
  doi={10.1088/1361-6501/ae58c8}
}
```

## ❓ Support & Feedback
ℹ️ ​**Detailed description in the [User Manual](manual/RTKLIB-B2b_UserManual.pdf).**  
ℹ️ ​**Developers in China: https://gitee.com/liu-chunbobo/RTKLIB-B2b.git**

## 🙏 Acknowledgements
We would like to thank **Xin Xu** from China University of Mining and Technology (Beijing) for providing valuable suggestions on software development and testing, and for assisting with extensive testing efforts.He continues to offer invaluable advice for the software's maintenance. If you encounter any issues while using the project, please feel free to contact us.

## 📜 License

[![GPLv3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)

Copyright (C) 2024-2026 Chunbo Liu / APM, CAS

This project is licensed under the [GNU General Public License v3.0](https://www.gnu.org/licenses/gpl-3.0). You are free to use, modify, and distribute this software under the terms of GPLv3. See the [LICENSE](LICENSE) file for details.