Click the "Select File" button above, and choose your OBS file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert OBS to another file type
To convert OBS observations to another format, you need RTKLIB or other GIS software.
Convert a file to OBS
To convert other file formats to the "GNSS Observation Data" file type, you need software like RTKLIB or a similar tool.
About OBS files
The .OBS extension mostly denotes a RINEX (Receiver Independent Exchange Format) Observation Data file or a Trimble TerraSync GPS field data file. These files store raw satellite tracking data, such as pseudorange, carrier-phase, and Doppler measurements collected by GNSS receivers. Other minor uses include Bruker OPUS spectroscopy blocks, US EPA AirNow data, and OpenTTD sound replacement sets. Professionals use tools like RTKLIB or Trimble Pathfinder Office to process these raw logs into accurate positional data. The main problem with .OBS files is their highly specialized nature. Raw RINEX or Trimble files require expensive, proprietary GIS software or complex command-line utilities to open. They are not human-readable by default and cannot be easily shared with clients or non-technical stakeholders who just want to see coordinates on a map. For data analysis and human readability, convert .OBS to CSV or TXT. If you need to visualize the spatial data in modern GIS applications or web maps, converting to GeoJSON, KML, or SHP is essential.
Convert.Guru analyzes your OBS file, detects the exact format, and lets you read the text inside.
If you want to convert OBS file to , you can use RTKLIB or similar software from the "GPS and GNSS Data Storage" category. In the File menu, look for Save As… or Export….
To convert files to OBS, try RTKLIB or another comparable tool in the "GPS and GNSS Data Storage" category.
The OBS Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our OBS converter.