NOAA Technical Memorandum NOS NGS-58 [pdf]
Guidelines for Establishing GPS-derived Ellipsoidal Heights (Standards: 2 cm and 5 cm) Version 4.3
NOAA Technical Memorandum NOS NGS-59 [pdf]
Guidelines for Establishing GPS-derived Orthometric Heights (Standards: 2 cm and 5 cm) are available. These guidelines address the establishment and densification of vertical control networks through the use of GPS surveys and valid NAVD 88 orthometric control.
Mark Cheves, Editor of Professional Surveyor
Magazine, talks about Increased
Accuracy for GPS Heights in the May/June 1996 issue. This
article describes research being carried out at NGS to improve
the accuracy of geometric heights determined by GPS.
Dave Zilkoski and Don D'Onofrio discuss the
Geodetic
Phase of NOS's San Francisco Bay Demonstration Project in
a paper prepared for presentation to the American Congress on
Surveying and Mapping.
Report on the Joint Coast Survey and National
Geodetic Survey Centimeter-Level Positioning of a Marine Vessel
Project: The
U. S. Coast Guard Buoy Tender Test
Louisiana
Sinking to Earth's Core - article in The Advocate ONLINE internet
publication, February 18, 2002.