G
Geodesy

Uncategorized

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

and September 28, 2022
Want to really understand sea-level rise? Bring in the geodesists!
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

, and June 13, 2022
The comprehensive Geodetic Information Portal of GGOS
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

and March 23, 2022
Geodesists on Tour: GNSS measurements in East Africa
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: On the left side of the road for getting the g

and January 24, 2022
Geodesists on Tour: On the left side of the road for getting the g
A10-020 absolute gravimeter a gravity station near Newport (Ireland).

Getting the small g (the absolute gravity value) outdoors has always been some sort of a challenge. But, in the early 2000s the possibility to measure gravity has changed by the arrival of the first A10 absolute gravimeters. They to a large extent revolutionized the approach of performing gravity measurements in the open field and with that improved the approach to design and measure national grav ...[Read More]