Benjamin Tennstedt

Leibniz Universität Hannover · Institute 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 this paper, an alternative technique to estimate the response of a cold atom interferometer (CAI) is presented. Using data of a conventional inertial measurement unit and the common strapdown terminology, the position of the atom wave packet is tracked in a newly introduced sensor frame. This enables a hybridisation of both systems. The sensor f...

This article discusses chances and challenges of using cold atom interferometers in inertial navigation. The error characteristics of the novel sensor are presented, as well as one option for an online estimation of the different readout errors. An extended Kalman filter framework is derived and analysed which uses the readout of the atom interfero...

A sensor fusion algorithm of a conventional MEMS IMU with semi-simulated cold atom interferometer (CAI) sensor values, based on an ESEKF, is demonstrated, and its performance is analyzed under different boundary conditions. CAI sensor values are generated from real navigation grade RLG IMU measurements. The MEMS IMU sensor data is used as input to...

This article discusses chances and challenges of using cold atom interferometers in inertial navigation. The error characteristics of the novel sensor are presented, as well as one option for an online estimation of the different readout errors. An extended Kalman filter framework is derived and analysed which uses the readout of the atom interfero...

This paper examines two specific possibilities to use the measurement of a cold atom interferometer (CAI) sensor in Mach-Zehnder configuration in a navigation solution, both in combination with a conventional IMU. A loosely coupled option within the solution of the Bortz equation is discussed, as well as a deeper integrated combination within an er...

In this contribution we will present some application cases for atom interferometry as an inertial sensor for navigation purposes. While there are more complex attempts for a six-degrees of freedom setup, which have not yet been realized and tested in a navigation filter framework, a simple setup of two counterpropagating interferometers is already...

We compare the deterministic and stochastic errors of cold atom interferometry inertial sensors on the base of a conventional sagnac gyro error model according to the IEEE.

This paper presents the implementation of an autonomous transportation vehicle as a kinematic test platform for navigation sensors and algorithms. The repeatability of the vehicle trajectory in an outdoor environment with GNSS-visibility will be shown. It is at the same level as most state of the art outdoor kinematic test sites. In addition, a fir...