Determination of the lunar body tide from global laser altimetry data
Kallenbach, Reinald
Christensen, Ulrich R.
Gläser, Philipp
Stark, Alexander
Steinbrügge, Gregor
Oberst, Jürgen
DOI: https://doi.org/10.1007/s00190-020-01455-8
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/10897
Kallenbach, Reinald; DLR Institute of Planetary Research, Berlin, Germany
Christensen, Ulrich R.; Max Planck Institute for Solar System Research, Göttingen, Germany
Gläser, Philipp; Institute of Geodesy and Geoinformation Science, Technische Universität Berlin, Berlin, Germany
Stark, Alexander; DLR Institute of Planetary Research, Berlin, Germany
Steinbrügge, Gregor; Department of Geophysics, Stanford University, Stanford, USA
Oberst, Jürgen; DLR Institute of Planetary Research, Berlin, Germany
Abstract
We use global data from the Lunar Orbiter Laser Altimeter (LOLA) to retrieve the lunar tidal Love number h2 and find h2 = 0.0387 ± 0.0025. This result is in agreement with previous estimates from laser altimetry using crossover points of LOLA profiles. The Love numbers k2 and h2 are key constraints on planetary interior models. We further develop and apply a retrieval method based on a simultaneous inversion for the topography and the tidal signal benefiting from the large volume of LOLA data. By the application to the lunar tides, we also demonstrate the potential of the method for future altimetry experiments at other planetary bodies. The results of this study are very promising with respect to the determination of Mercury’s and Ganymede’s h2 from future altimeter measurements.