Planetary geodesy

Planetary Geodesy

Sveučilište u ZagrebuGeodetski fakultetKolegij: Engleski jezik u funkciji strukeStudent: Natalija ŠagudDatum: 09.01.2012.

Determination and study of properties of any planetary body

- size - shape - rotation - gravity field

History

17th century – Galileo Galilei – first drawings of the Moon

18th century – Tobias Mayer – first control network of a planetary body (Moon)

Planetary mapping

Differences versus Earth Mapping tool: areal film camera or spacecraft

television systems

Science goals of planetary geodesy

Definition of reference systems Definition of rotation parameters (also precession

and libration)

Precession- change in the orientation of the rotation axis of a rotating body

Libration- an oscillating motion of orbiting bodies relative to each other

Lunar libration

Science goals of planetary geodesy

Establishment of: - planetary geodetic control point networks - global and local three-dimensional surface representations creation of geocoded image data and maps

Control points on other planetary bodies

Centers of craters as defined by their rims Analytical photogrammetry (for computing the

latitude and longitude of the control points)

Conclusion

Development of innovative cartographic techniques

Contribution to understanding of planetary objects Prime role in Solar System exploration

Questions

Who published first drawings of the Moon? When was established the first control network of a

planetary body? How do we call a change in the orientation of the

axis of a rotation body? Which libration is most common and best known? What is most common way to define a control point

on other planetary bodies?

Sources:1. R. Greeley, R.M. Batson: Planetary mapping2. http://www.dlr.de/pf/en/