December 6, 2017 Discussing the new North American-Pacific Geopotential Datum of 2022 — Part 4 By David B. Zilkoski
August 2, 2017 Discussing the new North American-Pacific Geopotential Datum of 2022 — Part 2 By David B. Zilkoski
June 7, 2017 Discussing the new North American-Pacific Geopotential Datum of 2022 — Part 1 By David B. Zilkoski
December 7, 2016 NGS to replace NAVD 88 in 2022: What GNSS users need to know — Part 10 By David B. Zilkoski
October 2, 2013 Seven Free Alternatives to OPUS GPS Post-Processing During U.S. Federal Government Shutdown By Eric Gakstatter
![[FIGURE 1] New Datums: Approximate Orthometric Height Change](https://stage.gpsworld.com/wp-content/uploads/2016/12/Fig1-datum-NGS-ortho-height-change.jpg)
