Big Red Bee GPS 50k

[plugger]

I just did a quick search but I couldn't find any posts regarding Big Red Bee's new 50 kilometer GPS unit. It looks like it hit the market mid October 2019. It's a very high altitude GPS unit that will not lock out above 50 km* like the uBlox chipsets do.

Here's the BRB blog post announcing the unit.

Does anyone know what chipset Greg has used in this unit?

* I don't know this but I trust Greg has tested it adequately.