Dear friends, Welcome! This is the starting page for space geodesy. Starting soon, we will share our interests with you by publishing a series of articles on space geodesy, gravity…

Is the Earth flat? Well, the shape of the Earth is quite an interesting topic. In science and physics, it's never shameful to start with approximations. We can start with…

A mathematical glimpse into spherical harmonics The story of Joseph Fourier (1768-1830) If you’ve been involved in physics or mathematics at some point in your life, you probably heard of…

A drop of water caught in the gravitational field of the Earth What the hell is water? There's an old Delta blues song called "High Water Everywhere" about the Great…

Which direction will you take?   In the previous article, we gave a broad overview about how to produce maps of Equivalent Water Heights from gravimetric satellite missions. Let's make…

Are you on the right track? Focus your efforts in the right direction In our previous article, we talked about why it was important to focus efforts in the right…

Future gravity missions Let's make a short break from the "Focusing efforts in the right direction" series (we'll come back to eigenvectors and eigenvalues soon), and talk about another burning…

Austrian geodesists and Viennese Waltzes After speaking of future gravity missions and before going back to eigenvalues and eigenvectors, let's make a short trip to Austria. One very talented group…

Resin replica of the Cullinan Diamond (Credits: Wikipedia / Public domain) The Cullinan Diamond Look at this picture of a man in his workshop. What can this be? Joseph Asscher…

Least squares are now hexagons Least squares revisited Everything you always wanted to know about the special CNES/Stellar Space Studies Singular Value Decomposition technique for gravity field inversion, with all…