In May 2021, I presented new research on quantifying Operational Risk Assessments (ORAs) with my colleagues Matt Petry and Garrett McKelvey. ORAs are a necessary part of gaining approval to fly drones Beyond Visual Line of Sight (BVLOS). Currently, ORAs take a lot of time and can be a complicated task.

In April 2020, I presented a talk on understanding GPS in contested environments. Topics included the following:Understanding GPS position error, dilution of precision and user range errors, physical and radio visibility, terrain heights and field results, mitigation techniques and alternative navigation technologies.

The national nightmare is over, we have a new president.

We live in the woods here. We are not alone.

I used to write stories. I haven't had the desire to write in quite a while, but I feel it starting to come back. Hopefully these won't be the last ones I'll write.

When you turn on your GPS receiver - what happens? Well, lots of stuff. But primarily, GPS receivers work in a two stage process: 1) Look for available satellites to track 2) Do everything else. In this article, I want to focus on step 1, we'll get to step 2 later.