- Astronomy, Observations and Techniques 40
- Physics, general 35
- Classical and Continuum Physics 33
- Geophysics/Geodesy 4
- Aerospace Technology and Astronautics 3
- Astrophysics and Astroparticles 2
- Communications Engineering, Networks 2
- Earth Sciences, general 2
- Optics, Lasers, Photonics, Optical Devices 1
- Remote Sensing/Photogrammetry 1