We welcomed Richard Easton, Lee Hammarstrom & Pete Wilhelm to This special 2 hour 16 minute program on Zoom. You should be able to see the video on doctorspace.substack.com and The Space Show Vimeo account as it will soon be posted to both accounts. This program on TSS website is audio only. Our discussion focused on the development and evolution of GPS and the PARCAE satellite technologies, along with NRO, NRL, computer tech of the time, covering their origins, technical challenges, and applications. Our guests discussed the historical context, including early proposals, declassification processes, and the interconnected nature of these programs. Understanding time, atomic clocks and even Einstein's relativity equations were crucial to this up to now classified project. The conversation also touched on future developments, potential applications in space exploration, and concerns about system resilience in various environments. We talked innovation "back in the day" along with the Grab, Poppy and the transition from strategic to tactical information. Be sure to read the comprehensive program summary on TSS website as well as our Substack page, doctorspace.substack.com.