# Amadee-24-ALIX

Last modified by Hermann Hinterhauser on 2024/07/03 19:00
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### Details

Acronym | ALIX –Astronaut Location Interferometry experiment
Description | Radio interferometry-based location tracking using room-scale antenna setups to investigate cm-scale tracking, as well as ground receiver stations for km-resolution.
Principal Investigator (PI) | Christiaan Brinkerink | c.brinkerink@astro.ru.nl
Organisation | Radboud Radio Lab, Dept. of Astrophysics, Radboud University
Co-Investigators | Niels Vertegaal/ Eindhoven University of Technology Roel Jordans/ Eindhoven University of Technology Sjoerd Timmer/ Radboud Radio Lab Roel Kleinhans/ Radboud University Sam van den Ende/ Radboud University

### Summary

On Mars, no satellite systems are available that would enable or facilitate navigation. Alternative methods of electronic navigation are therefore required. A local system, independent on larger-scale infrastructures, is of particular interest. It can be centrally deployed from a landing site and may be scaled up along with the area in which it is meant to operate.The Astronaut Location Interferometry eXperiment (ALIX) aims to perform (live) location tracking of astronauts or mobile platforms using a compact mobile radio transmitter, a set of reference beacons, and a small network of receiver stations. The location tracking shall operate over an area of several square kilometers at meter-scale accuracy. Comparing the ALIX tracking results to positions reconstructed by other systems (e.g. GNSS) will further improve this technology. Ultimately, ALIX will be developed into a reliable system for limited-range location tracking, using minimal number of resources and infrastructure.ALIX uses a mobile transmitter that emits a radio signal. At various stationary receiver stations, the phase of this signal will be measured at regular intervals. With two receiver stations each, the phase difference at the corresponding measurement time can be calculated, hence the position of the transmitter can be tracked. To aid in synchronization of the receiver stations, the use of stationary transmitter beacons is planned. They will transmit at slightly different frequencies than the mobile transmitter, thus providing reference measurements to perform phase corrections.

### Experiment Data

Date | Files
--- | ---
2021-10-04 | types of files for each experiment day, size of the cells: width 1000px, height 10px

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Created by Hermann Hinterhauser on 2024/03/25 11:03

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