An Applanix (https://www.applanix.com) smooth best estimated trajectory (SBET) binary file is a common file you may encounter when working in field LiDAR, and aerial photo data collection. It is basically a refined trajectory of the real time navigation of the path taken in the field data collection process.
I wrote an online WebApp tool (https://dominoc925-pages.appspot.com/webapp/sbetcsv/default.html) to convert an SBET file (typically with an extension *.out) to a comma-separated value (CSV) file, and compressed to a ZIP file for easier transportation. The extraction, conversion and compression processes take place inside a Web browser locally only; there is no requirement to upload to a web server so that will save on the time and data connection costs.
To use this converter, simply visit the web site https://dominoc925-pages.appspot.com/webapp/sbetcsv/default.html with any modern web browser.
Then, just drag and drop an SBET file, e.g. SBET.OUT onto the indicated area. Or click the Browse button and select the SBET file. Then click Open.
A process indicator will be displayed while the conversion is taking place. After the conversion has completed, a download link will appear as shown below.
Click the link to download the zip file and extract out the converted CSV file. An example of the result of the conversion is shown below. 
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