In the field of Global Navigation Satellite Systems (GNSS), raw data collected by a receiver is the foundation of all high-precision positioning, navigation, and timing applications. However, this raw data is rarely in a universally readable form. Most manufacturers, such as ComNav Technology Ltd., store observation data in proprietary binary formats—ComNav’s native format being the CNB file. To make this data usable across different scientific and commercial software platforms, it must be converted into a standard, open format known as RINEX (Receiver Independent Exchange Format). The process of converting CNB to RINEX is not merely a technical formality; it is a critical step that unlocks data portability, ensures long-term archiving, and enables rigorous post-processing analysis. Understanding the Two Formats The CNB format is a binary file structure designed by ComNav for efficiency. Binary formats are compact, fast to write, and ideal for a receiver’s internal memory and real-time logging. However, this efficiency comes at the cost of interoperability. CNB files cannot be directly read by most geodetic software (e.g., Bernese, GAMIT/GLOBK, RTKLIB) without specialized, manufacturer-specific libraries.