62 citations · 127 across the 10 of their papers we have counts for
10 papers
General Relativistic Chronometry with Clocks on Ground and in Space
Dennis Philipp, Eva Hackmann, Jan P. Hackstein +1
One of the main tasks of geodesy is to determine the gravity field of the Earth from measurements performed on ground and in space. High-precision clock comparison has the potentia…
Improving Magnetic Resonance Imaging with Smart and Thin Metasurfaces
Endri Stoja, Simon Konstandin, Dennis Philipp +6
Over almost five decades of development and improvement, Magnetic Resonance Imaging (MRI) has become a rich and powerful, non-invasive technique in medical imaging, yet not reachin…
The Relativistic Geoid: Gravity Potential and Relativistic Effects
Dennis Philipp, Eva Hackmann, Claus Lämmerzahl +1
The Earth's geoid is one of the most essential and fundamental concepts to provide a gravity field-related height reference in geodesy and associated sciences. To keep up with the…
Redshift and frequency comparison in Schwarzschild spacetime
Dennis Philipp, Eva Hackmann, Claus Laemmerzahl
We derive exact expressions for the relativistic redshift between an Earth-bound observer, that is meant to model a standard clock on the Earth's surface, and various (geodesic) ob…
Modeling approaches for precise relativistic orbits: Analytical, Lie-series, and pN approximation
Dennis Philipp, Florian Wöske, Liliane Biskupek +5
Accurate orbit modeling plays a key role in contemporary and future space missions such as GRACE and its successor GRACE-FO, GNSS, and altimetry missions. To fully exploit the tech…
Definition of the relativistic geoid in terms of isochronometric surfaces
Dennis Philipp, Volker Perlick, Dirk Puetzfeld +2
We present a definition of the geoid that is based on the formalism of general relativity without approximations; i.e. it allows for arbitrarily strong gravitational fields. For th…