TY - JOUR

T1 - Improved Inertial Navigation With Cold Atom Interferometry

AU - Tennstedt, B.

AU - Weddig, N.

AU - Schön, S.

N1 - Funding Information: This work was sponsored by BMWi, project 50RK1957. The authors would like to thank [] for providing the interferometer data for the experimental study in Section 5.1, as well as EXC-2123 QuantumFrontiers – 390837967 for providing a platform of exchange.

PY - 2021/12

Y1 - 2021/12

N2 - Abstract: 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 interferometer as observation in order to correct several systematic errors of a conventional IMU, allowing for an improved strapdown calculation in an arbitrary target system. The performance gain is discussed analytically based on the steady state variances of the filter, as well as on the example of a simulated scenario for Earth orbit satellites. The correction of the conventional IMU errors is further demonstrated in an experiment under laboratory conditions with a higher class sensor emulating an atom interferometer. While the application of the novel technology as a gyroscope is still limited, as pointed out in the paper, the presented framework yields options for a full six degree of freedom operation of the atom interferometer.

AB - Abstract: 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 interferometer as observation in order to correct several systematic errors of a conventional IMU, allowing for an improved strapdown calculation in an arbitrary target system. The performance gain is discussed analytically based on the steady state variances of the filter, as well as on the example of a simulated scenario for Earth orbit satellites. The correction of the conventional IMU errors is further demonstrated in an experiment under laboratory conditions with a higher class sensor emulating an atom interferometer. While the application of the novel technology as a gyroscope is still limited, as pointed out in the paper, the presented framework yields options for a full six degree of freedom operation of the atom interferometer.

KW - cold atom interferometry

KW - extended Kalman filter

KW - hybridization

KW - inertial navigation

UR - http://www.scopus.com/inward/record.url?scp=85126187969&partnerID=8YFLogxK

U2 - 10.1134/S207510872104009X

DO - 10.1134/S207510872104009X

M3 - Article

AN - SCOPUS:85126187969

VL - 12

SP - 294

EP - 307

JO - Gyroscopy and Navigation

JF - Gyroscopy and Navigation

SN - 2075-1087

IS - 4

ER -