Geodesy | gnss

Want to really understand sea-level rise? Bring in the geodesists!

Thomas Frederikse and edited by Rebekka Steffen September 28, 2022

Trends in sea level over 2005-2019 using satellite altimetry and gravimetry data.

A remarkably large number of papers and proposals have sentences like “this study is critical to better project future sea-level rise” in their introduction. Most times this is just marketing to trick reviewers and program managers into believing the work is important. On the other hand, geodetic papers and proposals have some compelling reasons to use this statement: a lot of geodetic tech ...[Read More]

The comprehensive Geodetic Information Portal of GGOS

Martin Sehnal, edited by Rebekka Steffen and Andreas Kvas (Editor) June 13, 2022

Global Geodetic Observing System (GGOS)

The Global Geodetic Observing System (GGOS) of the International Association of Geodesy (IAG) is a collaborative contribution of the global geodesy community to the observation and monitoring of the Earth System. Geodesy is the science of determining the shape of the Earth, its gravity field, and its rotation as functions of time. Essential to reaching this goal are stable and consistent geodetic ...[Read More]

Geodesists on Tour: GNSS measurements in East Africa

D. Sarah Stamps and edited by Rebekka Steffen March 23, 2022

Installation of site UGN6 at the Queen’s Pavilion (Uganda). Photo Credit: D. Sarah Stamps.

Africa hosts the world’s most extensive subaerial rift system on Earth known as the East African Rift System (EARS). It stretches over 5000 km from the Red Sea and Gulf of Aden intersection in the north to the Southwest Indian Spreading Ridge south of South Africa. East-West, the EARS spans the eastern border of the Democratic Republic of Congo across to eastern Madagascar over 3000 km. The ...[Read More]

Geodesists on Tour: GPS measurements on Antarctica

Stephanie Konfal and edited by Rebekka Steffen October 10, 2021

ANET GPS site at Lepley Nunatak. Photo credit: Jeremy Miner

Stories from the field – how exactly are those GPS data collected? The geodesy community at large benefits from the many science projects with open data policies. A user simply has to navigate to a data portal, download the data, and within a matter of moments a world of possibilities opens up for potential research. But where exactly do these data come from? While scientific results get ...[Read More]