Alireza Hosseiniarani

Leibniz Universität Hannover · Instuitute of geodesy

Proof-of-principle demonstrations have been made for cold atom interferometer (CAI) sensors. Using CAI-based accelerometers in the next generation of satellite gravimetry missions can provide long-term stability and precise measurements of the non-gravitational forces acting on the satellites. This would allow a better understanding of climate chan...

In various geoscience disciplines, there is a huge interest in knowing the mass variations of the Earth with high resolution and accuracy. It is vital for monitoring climate change processes to define corresponding requirements for the sensor technology and for possible satellite missions. The future satellite missions will strongly depend on the a...

Satellite gravity missions, like GRACE and GRACE Follow-On, successfully map the Earth's gravity field and its change over time. With the addition of the laser ranging interferometer (LRI) to GRACEFO, a significant improvement over GRACE for intersatellite ranging was achieved. One of the limiting factors is the accelerometer for measuring the non-...

In various geoscience disciplines, there is a huge interest in knowing the mass variations of the Earth with high resolution and accuracy. It is vital for monitoring climate change processes to define corresponding requirements for the sensor technology and for possible satellite missions. The future satellite missions will strongly depend on the a...

The success of GRACE-FO and its predecessors has demonstrated to the scientific community the benefits of satellite gravimetry for monitoring mass variations on the Earth’s surface and its interior. However, the demand for increasingly higher spatial and temporal resolution of gravity field solutions has brought into focus the need for next-generat...

The BepiColombo Laser Altimeter (BELA) is the first European laser altimeter constructed for interplanetary flight. BELA uses a 50 mJ pulsed Nd:YAG laser operating at 10 Hz with a 20 cm aperture receiver to perform the ranging. The instrument also uses a digital approach for range detection and pulse analysis. The ranging accuracy is expected to be...

The BepiColombo Laser Altimeter (BELA) is on its way to Mercury on board the Mercury Planetary Orbiter (MPO), one of the two spacecraft of the BepiColombo mission. It will arrive at Mercury in Dec 2025 and start measurements of Mercury's surface and environment. The goal of this study is to analyze the performance of BELA by using a comprehensive i...

The goal of this work is to simulate the BELA measurements in-orbit around Mercury and to study the instrument performance in determining the topography and surface properties of Mercury. We also discuss possible approaches to improve the instrument performance.