On Water And Subsidence In Mexico City

Mexico City has the best hotel shower ever. I am not one to spend a long time in the shower, but...

Citizen Science Then And Now. Want To Play The Game?

Our cabin is situated in one of the most remote places in Norway. My family got the place in the...

World Biodiversity Day: Wetlands, Biodiversity And The Role Of Earth Observations

It is somehow ingrained in my body, I think. The appreciation of biodiversity. I know I love wetlands...

A Modern Explorer's Journey - Mobilizing Resources For Water Cycle Research And Earth Observations

New series of webinars on Earth observations and the water cycle – Check details at the end...

User picture.
picture for Hank Campbellpicture for Tommaso Dorigopicture for Sascha Vongehrpicture for Steve Schulerpicture for Samuel Kenyonpicture for Patrick Lockerby
Bente Lilja ByeRSS Feed of this column.

Earth science expert and astrophysicist writes about Earth observation, geodesy, climate change, geohazards, water cycle and other science related topics.

Today I do research and provide... Read More »

Phoenix Mars Lander as well as knowledge about Mars itself depend on geodesy, in particular planetary geodesy. I will put together a piece on that shortly...
Geodesy is the science of determining the geometry, gravity field, and rotation of the Earth and their evolution in time. Traditionally, geodesy has been serving other sciences and has had many societal applications, including mapping. With the advent of satellite technology, geodesy itself developed into a science, making unique contributions to the study of the Earth system, its inherit dynamics, and its response to climate change, as well as a tool underpinning a wide variety of other remote sensing techniques. Geodesy is an important element in making all Earth observations interoperable, facilitating the combination of satellite observations with those gathered on ground.

Esa Galileo
The European Global Navigation Satellite System (GNSS) is called Galileo. Credit: ESA

Facilitated by Global Navigation Satellite Systems such as GPS, a wide and growing set of applications associated with positioning and navigation is opening up.
Geodesy is the science of determining the earth's geometry, kinematics, gravity field, and their evolution in time.