Dual Satellite NTP server with Navspark

A friend from NIST recently told me about a Raspberry Pi Stratum-1 NTP server project, and that reminded me of the experiments I did with the Navspark dual GPS+Beidou receiver module. Navspark is a small, Arduino-compatible module that besides GPS can also receive data from China’s Beidou 北斗 satellite navigation system , that is currently being built. […]

Taiwan WWII Map Overlays

A while ago I came across the Formosa (Taiwan) City Plans, U.S. Army Map Service, 1944-1945 collection, in the Perry-Castañeda Library Map Collection of the University of Texas in Austin. I’m a sucker for maps, enjoy learning about history a lot, and I have a lot of interest in my current home, Taiwan – so you can call this a […]