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Wednesday, August 24, 2011

Smoothed Best Estimate of Trajectory (SBET) Format

A buddy of mine in the LiDAR industry asked me if we had any software which could handle the Applanix SBET binary format.  I wasn't familiar with it but it turns out on Google the only parsers you can find just happend to be in Python. 

I'm still not 100% sure what these datasets do so if you know feel free to post a comment.

So if you need to work with this format here are two options:

http://arsf-dan.nerc.ac.uk/trac/attachment/wiki/Processing/SyntheticDataset/sbet_handler.py

http://schwehr.blogspot.com/2010/12/best-possible-python-file-reading.html

And if you're into LiDAR you are probably already aware of PyLAS for the LAS format;

http://code.google.com/p/pylas/

5 comments:

  1. I associate SBET with the best path computed by Applanix's POSPac/POSMMS software. Essentially post-processed gps data. Thanks for posting this, I was just looking into this also.

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  2. I work with Applanix POSPac formats extensively in the hydrographic field. As the Anonymous poster indicated the files are for post-processed IMU/GNSS coupled solutions. They are generally used with an associated Post-Processed Solution Accuracy File (SMRMSG file) which contains error RMS values for all solution components. The files are very simple to read as they are just a series of doubles. I'm happy to provide further advice/information if needed.

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    Replies
    1. Can you advise as to how to convert the GPS time of week to a complete time structure like SYSTEMTIME? Seems like the GPS week number would be needed for this but it does not seem to be recorded. Thanks!

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  3. Hi Joel

    Do you somehow know how to convert SBET into SHP format?
    Thanks and greetings from Poland
    J

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  4. Great article! Can anyone offer any advice on how to convert SBET files to an ASCII format? Im really struggling to make this conversion.

    Luke

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