About David B. Zilkoski
David B. Zilkoski has worked in the fields of geodesy and surveying for more than 40 years. He was employed by National Geodetic Survey (NGS) from 1974 to 2009. He served as NGS director from October 2005 to January 2009. During his career with NGS, he conducted applied GPS research to evaluate and develop guidelines for using new technology to generate geospatial products. Based on instrument testing, he developed and verified new specifications and procedures to estimate classically derived, as well as GPS-derived, orthometric heights.
Now retired from government service, as a consultant he provides technical guidance on GNSS surveys; computes crustal movement rates using GPS and leveling data; and leads training sessions on guidelines for estimating GPS-derived heights, procedures for performing leveling network adjustments, the use of ArcGIS for analyses of adjustment data and results, and the proper procedures to follow when estimating crustal movement rates using geodetic leveling data. Contact him at dzilkoski@gpsworld.com.
Posts by David B. Zilkoski
Are you prepared to implement the new NSRS once NGS officially adopts it? Dave Zilkoski highlights the best ways to prepare for the transition. Read more»
The California Spatial Reference Center (CSRC) modernized the California Spatial Reference Network (CSRN). Read more»
We highlight upcoming OPUS product changes that NGS will implement following adoption of the modernized NSRS, along with updates to CORS station coordinates resulting from the Multi‑Year CORS Solution 3 (MYCS3). Read more»
Dave Zilkoski highlight some history of the Coast and Geodetic Survey and provide the latest information on the National Geodetic Survey new National Spatial Reference System (NSRS). Read more»
In NGS's most recent webinar, Dave Zenk discussed the importance of proper constraint application in GNSS network adjustments. Read more»
News on the Certificate for Geodetic Surveying program was shared at the quarterly meeting of the American Association for Geodetic Surveying (AAGS), the National Geodetic Survey (NGS) and the National Society of Professional Surveyors (NSPS). Read more»
NGS will be releasing a Beta version of the new terrestrial reference frames and geopotential datum. This newsletter highlights the NAPGD2022 alpha site. Read more»
Dan Martin, Northeast Regional Geodetic Advisor for the National Geodetic Survey, hosted a webinar titled “Why OPUS Projects’ Hub Processing Strategy is not a Radial Survey." Read more»
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