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Non-linear quantization error reduction for the temperature measurement subsystem on-board LISA Pathfinder

Sanjuan, Jose and Nofrarias, M. (2018) Non-linear quantization error reduction for the temperature measurement subsystem on-board LISA Pathfinder. Review of Scientific Instruments, 89 (4). American Institute of Physics (AIP). doi: 10.1063/1.5012692. ISSN 0034-6748.

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Official URL: https://aip.scitation.org/doi/10.1063/1.5012692


Laser Interferometer Space Antenna (LISA) Pathfinder is a mission to test the technology enabling gravitational wave detection in space and to demonstrate that sub-femto-g free fall levels are possible. To do so, the distance between two free falling test masses is measured to unprecedented sensitivity by means of laser interferometry. Temperature fluctuations are one of the noise sources limiting the free fall accuracy and the interferometer performance and need to be known at the ∼10 μK Hz−1/2 level in the sub-millihertz frequency range in order to validate the noise models for the future space-based gravitational wave detector LISA. The temperature measurement subsystem on LISA Pathfinder is in charge of monitoring the thermal environment at key locations with noise levels of 7.5 μK Hz−1/2 at the sub-millihertz. However, its performance worsens by one to two orders of magnitude when slowly changing temperatures are measured due to errors introduced by analog-to-digital converter non-linearities. In this paper, we present a method to reduce this effect by data post-processing. The method is applied to experimental data available from on-ground validation tests to demonstrate its performance and the potential benefit for in-flight data. The analog-to-digital converter effects are reduced by a factor between three and six in the frequencies where the errors play an important role. An average 2.7 fold noise reduction is demonstrated in the 0.3 mHz–2 mHz band.

Item URL in elib:https://elib.dlr.de/120159/
Document Type:Article
Title:Non-linear quantization error reduction for the temperature measurement subsystem on-board LISA Pathfinder
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Nofrarias, M.Institut de Ciències de l`Espai (ICE,CSIC)UNSPECIFIEDUNSPECIFIED
Date:16 April 2018
Journal or Publication Title:Review of Scientific Instruments
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:American Institute of Physics (AIP)
Keywords:LISA Pathfinder , Laser Interferometer , temperature measurement
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben GRACE Follow-On (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Systems Enabling Technologies
Deposited By: Hüls, Simone
Deposited On:21 Jun 2018 10:27
Last Modified:06 Sep 2019 15:29

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