Atom Strapdown

High Rate Phase Shift Calculation for Atom Interferometer Inertial Sensors

authored by: Benjamin Tennstedt, Nicolai Weddig, Steffen Schön, Ashwin Rajagopalan, Sven Abend, Ernst M. Rasel
Abstract: 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 frame allows for an easier mathematical description of the interferometer measurement and makes integration into higher-level navigation systems possible. Equations for a hybrid IMU/CAI system with several arbitrarily placed sensor frames are stated, as well as a compressed Multi-Axis model, following current developments in chip scale atom interferometry. The atom strapdown is compared with another common hybridisation technique which utilizes convolution of accelerometer data with the interferometer response function. The comparison is supported by real data. The dynamic terms resulting from the transformation of the IMU frame into the sensor frame of the CAI are evaluated in simulations and further discussed. Finally, the implications of the findings for future hybrid quantum navigation systems are stated.
Organisation(s): Institute of Geodesy
QUEST-Leibniz Research School
Institute of Quantum Optics
Quantum Sensing
QuantumFrontiers
Type: Conference contribution
Pages: 1377-1391
No. of pages: 15
Publication date: 2022
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Information Systems, Software, Electrical and Electronic Engineering, Communication, Computer Networks and Communications, Computer Science Applications
Electronic version(s): https://doi.org/10.33012/2022.18321 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{67dbb017428a4e9e877763b50d888f22,
title = "Atom Strapdown: High Rate Phase Shift Calculation for Atom Interferometer Inertial Sensors",
abstract = "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 frame allows for an easier mathematical description of the interferometer measurement and makes integration into higher-level navigation systems possible. Equations for a hybrid IMU/CAI system with several arbitrarily placed sensor frames are stated, as well as a compressed Multi-Axis model, following current developments in chip scale atom interferometry. The atom strapdown is compared with another common hybridisation technique which utilizes convolution of accelerometer data with the interferometer response function. The comparison is supported by real data. The dynamic terms resulting from the transformation of the IMU frame into the sensor frame of the CAI are evaluated in simulations and further discussed. Finally, the implications of the findings for future hybrid quantum navigation systems are stated.",
author = "Benjamin Tennstedt and Nicolai Weddig and Steffen Sch{\"o}n and Ashwin Rajagopalan and Sven Abend and Rasel, {Ernst M.}",
note = "Funding Information: This research is funded by the Federal Ministry for Economic Affairs and Climate Action (BMWK) due to an enactment of the German Bundestag under Grant 50RK1957 (QGyro), 50NA2106 (QGyro+). The team further acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy—EXC-2123 QuantumFrontiers —Project-ID 390837967, the SFB 1227 DQ-mat –Project-ID 274200144– within the Projects B07 and B09, and –Project-ID 434617780– SFB 1464 TerraQ within the projects A01, A02 and A03, supports by the German Space Agency (DLR) with funds provided by the Federal Ministry for Economic Affairs and Climate Action (BMWK) due to an enactment of the German Bundestag under Grant No. DLR 50WM1952 and 50WM1955 (QUANTUS-V-Fallturm), 50WP1700 (BECCAL), and the Verein Deutscher Ingenieure (VDI) with funds provided by the Federal Ministry of Education and Research (BMBF) under Grant No. VDI 13N14838 (TAIOL).; 35th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS+ 2022 ; Conference date: 19-09-2022 Through 23-09-2022",
year = "2022",
doi = "10.33012/2022.18321",
language = "English",
series = "Proceedings of the Satellite Division's International Technical Meeting",
publisher = "Institute of Navigation",
pages = "1377--1391",
booktitle = "Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022)",
}