11 Result(s)
within
Jürgen Oberst
Geophysics/Geodesy
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Article
Open AccessSimulation of gravity field estimation of Phobos for Martian Moon eXploration (MMX)
We study the dynamic orbit about Phobos of the Martian Moon eXploration (MMX) spacecraft and simulate gravity field estimation using Doppler, image landmarks, and LIght Detection And Ranging (LIDAR) data based...
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Article
Open AccessSensitivity analysis of polar orbiter motion to lunar viscoelastic tidal deformation
We investigate the impact of viscoelastic tidal deformation of the Moon on the motion of a polar orbiter. The dissipative effects in the Moon’s interior, i.e., tidal phase lags, are modeled as Fourier series s...
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Article
Processing of laser altimeter time-of-flight measurements to geodetic coordinates
Laser altimeters are commonly used in planetary research for their high geodetic accuracy. A key procedure in processing of laser altimeter data is the geolocation. In this process, the time-of-flight measurem...
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Article
Open AccessDetermination of the lunar body tide from global laser altimetry data
We use global data from the Lunar Orbiter Laser Altimeter (LOLA) to retrieve the lunar tidal Love number \(h_2\) ...
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Article
Determination of Phobos’ rotational parameters by an inertial frame bundle block adjustment
A functional model for a bundle block adjustment in the inertial reference frame was developed, implemented and tested. This approach enables the determination of rotation parameters of planetary bodies on the...
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Article
The reference frames of Mercury after the MESSENGER mission
We report on recent refinements and the current status for the rotational state models and the reference frames of the planet Mercury. We summarize the performed measurements of Mercury rotation based on terre...
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Chapter and Conference Paper
Towards Improved Lunar Reference Frames: LRO Orbit Determination
Lunar reference systems are currently realized by sets of coordinates of the few laser reflectors deployed by Apollo astronauts and unmanned Soviet spacecrafts. Expanding this coordinate knowledge to other fea...
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Article
Mercury’s resonant rotation from secular orbital elements
We used recently produced Solar System ephemerides, which incorporate 2 years of ranging observations to the MESSENGER spacecraft, to extract the secular orbital elements for Mercury and associated uncertainti...
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Article
Non-mare silicic volcanism on the lunar farside at Compton–Belkovich
Non-basaltic volcanism is rare on the Moon. The best known examples occur on the lunar nearside in the compositionally evolved Procellarum KREEP terrane. However, there is an isolated thorium-rich area—the Com...
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Article
Open AccessAccuracy assessment of lunar topography models
Both the Chang’E-1 and SELenological and ENgineering Explorer (SELENE) lunar missions, launched in 2007, provide an opportunity for significant advances in lunar science. In particular, both orbiters provide refi...
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Chapter
Contribution of Lunar Laser Ranging to Realise Geodetic Reference Systems
Lunar Laser Ranging (LLR) has provided observations for more than 36 years. There is enormous science potential of LLR to further our understanding of the dynamics of the Earth-Moon system (e.g.Earth orientati...
