June 7, 2017 Discussing the new North American-Pacific Geopotential Datum of 2022 — Part 1 By David B. Zilkoski
October 5, 2016 Analyzing NGS’ GPS on benchmark dataset used to make GEOID12B — Part 9 By David B. Zilkoski
October 2, 2013 Seven Free Alternatives to OPUS GPS Post-Processing During U.S. Federal Government Shutdown By Eric Gakstatter