GPS World

NGS 2018 GPS on BMs program in support of NAPGD2022 — Part 5

My last column highlighted two components of the North American-Pacific Vertical Datum of 2022 (NAPGD2022) — the geoid undulation model of GEOID2022 and gravity model of GRAV2022. It expressed that ...
GPS World

NGS 2018 GPS on BMs program in support of NAPGD2022 — Part 7

My last column described the National Geodetic Survey’s (NGS) GPS on Bench Marks (BM) 2018 interactive web map, and provided an update and status report on stations observed in support of the 2018 GPS ...