I'm Ernst J.O. (Ejo) Schrama, associate professor within the section Astrodynamics and Space Mission (A&S) at the Faculty of Aerospace Engineering at the TU Delft in the Netherlands.

I'm co-investigator on the ERS-1/2 and Envisat altimeter missions and principal investigator on the TOPEX/Poseidon and Jason-1 altimeter missions, and I'm involved in numerous contract studies related to ESA’s GOCE gravity gradiometer mission. At this moment we have a contract with ESA related to the Cryosat-2 mission launched April 8, 2010. You can find me on linkedin, my articles are here and a meta-library is maintained at citeulike. The meta-library enables you to retrieve published articles in my research field.

On the left is the mass loss expressed in Gt/yr (roughly equivalent to one cubic kilometer of ice per year) for eight coastal basins in the Greenland system, and on the right is the acceleraton in Gt/yr^2. These results were obtained from the GRACE mission between March 2003 and February 2010.

- Planetary sciences (ae4-890)

- Physics of the earth (ae4-876)

- Satellite Observation Systems and Reference Systems (ae4-e01)
- Second and Third year student projects

AE4-E01 Satellite Observation Systems and Reference Systems

The exact description of this course can be found in the study guide,

- Signal propagation: sheets are here, homework assignments are here
- Satellite dynamics I: sheets are here, homework assignment are here
- Some mathematical details on Kepler mechanics (mentioned in
Satellite Dynamics I) is here

- Satellite dynamics II: sheets are here homework
assignments are here

- Applications I+II: sheets are here,
homework assignments are here

- Wrap-up lecture, sheets are here
- Example exam questions are in this file
- Example MATLAB scripts to illustrate Kepler mechanics:
- keplerorbit.m is
for deriving inertial positions and velocities from Keplerian elements

- keplereq.m is for solving Kepler's equations M = E - e*sin(E)
- orbitplane.m is for the computation of the in-plane solution
- earthcoord.m is for transforming an in-plane solution to inertial space.
- Example MATLAB scripts to illustrate numerical integration:
- bullet.m and go_bullet.m demonstrate the first example
- satdyn.m and go_satdyn.m demonstrate the second example

AE4-876 Physics of the Earth

I contribute to this course on the subject tides which can be found in the study guide,

- My tides lecture notes on tides are here
- The powerpoint sheets for tides are here
- A lecture on the Earth's climate is here

AE4-890 Planetary Sciences

See blackboard at TU Delft for the lastest status of AE4-890.

For the November December course on 10 nov 2006:

- We use the book
of Imke de Pater and Jack Lissauer

- The lecture schedule for 2006 is here

- We have a poster that we ask you to distribute
- Course ae4-890 is in our study guide
- The reading guide for the book is here

- Sheets used for lecture on Dynamics I : [ppt] [pdf]
- Sheets used for lecutre on Dynamics II : [ppt] [pdf]

- Note on Kepler orbit mechnics [pdf]

- Note on Lagrangian points [pdf]
- Note on Hill equations [pdf]
- Note on Roche limit [pdf]
- A matlab script to compute Lagragian points [matlabscript] (this script requires also the orbit.m script)
- A maple script to verify the positions of Lagragian points L1 L2 and L3 [maplescript]

Info

Last update: 14-Feb-2011