Details
| Original language | English |
|---|---|
| Article number | 042005 |
| Journal | Physical Review D |
| Volume | 106 |
| Issue number | 4 |
| Publication status | Published - 15 Aug 2022 |
Abstract
The coupling of an angular jitter into the interferometric phase readout is summarized under the term tilt-To-length (TTL) coupling. This noise is expected to be a major noise source in the intersatellite interferometry for the Laser Interferometer Space Antenna (LISA) space mission. Despite efforts to reduce it by satellite construction, some remaining TTL noise will need to be removed in postprocessing on Earth. Therefore, such a procedure needs to be developed and validated to ensure the success of the LISA mission. This paper shows a method to calibrate and subtract TTL noise that has no impact on LISA science operations. This solution relies on noise minimization and uses the differential wavefront sensing (DWS) measurements to estimate the TTL contribution. Our technique is applied after the laser frequency noise is suppressed via the time-delay interferometry (TDI) postprocessing algorithm. We use a simulation to show as a proof-of-principle that we can estimate the TTL coefficients to the required accuracy level based on the current design configuration of LISA. We then use these estimates to subtract the TTL noise, ensuring that any remaining TTL noise is below the current estimate of the other noise sources. We validate the procedure on simulated data for different operating scenarios. Our work shows that it is indeed possible to estimate the effect of TTL coupling and subtract it a posteriori from the TDI data streams.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
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In: Physical Review D, Vol. 106, No. 4, 042005, 15.08.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Postprocessing subtraction of tilt-to-length noise in LISA
AU - Paczkowski, S.
AU - Giusteri, R.
AU - Hewitson, M.
AU - Karnesis, N.
AU - Fitzsimons, E. d.
AU - Wanner, G.
AU - Heinzel, G.
N1 - Funding information: S. P., R. G., M. H., G. W., and G. H. gratefully acknowledge support by Deutsches Zentrum für Luft- und Raumfahrt (DLR) with funding of the Bundesministerium für Wirtschaft und Energie with a decision of the Deutsche Bundestag (DLR Project Reference No. FKZ 50 OQ 11801). N. K. acknowledges the support from the Gr-PRODEX 2019 funding program. E. F. gratefully acknowledges support from the UK Space Agency.
PY - 2022/8/15
Y1 - 2022/8/15
N2 - The coupling of an angular jitter into the interferometric phase readout is summarized under the term tilt-To-length (TTL) coupling. This noise is expected to be a major noise source in the intersatellite interferometry for the Laser Interferometer Space Antenna (LISA) space mission. Despite efforts to reduce it by satellite construction, some remaining TTL noise will need to be removed in postprocessing on Earth. Therefore, such a procedure needs to be developed and validated to ensure the success of the LISA mission. This paper shows a method to calibrate and subtract TTL noise that has no impact on LISA science operations. This solution relies on noise minimization and uses the differential wavefront sensing (DWS) measurements to estimate the TTL contribution. Our technique is applied after the laser frequency noise is suppressed via the time-delay interferometry (TDI) postprocessing algorithm. We use a simulation to show as a proof-of-principle that we can estimate the TTL coefficients to the required accuracy level based on the current design configuration of LISA. We then use these estimates to subtract the TTL noise, ensuring that any remaining TTL noise is below the current estimate of the other noise sources. We validate the procedure on simulated data for different operating scenarios. Our work shows that it is indeed possible to estimate the effect of TTL coupling and subtract it a posteriori from the TDI data streams.
AB - The coupling of an angular jitter into the interferometric phase readout is summarized under the term tilt-To-length (TTL) coupling. This noise is expected to be a major noise source in the intersatellite interferometry for the Laser Interferometer Space Antenna (LISA) space mission. Despite efforts to reduce it by satellite construction, some remaining TTL noise will need to be removed in postprocessing on Earth. Therefore, such a procedure needs to be developed and validated to ensure the success of the LISA mission. This paper shows a method to calibrate and subtract TTL noise that has no impact on LISA science operations. This solution relies on noise minimization and uses the differential wavefront sensing (DWS) measurements to estimate the TTL contribution. Our technique is applied after the laser frequency noise is suppressed via the time-delay interferometry (TDI) postprocessing algorithm. We use a simulation to show as a proof-of-principle that we can estimate the TTL coefficients to the required accuracy level based on the current design configuration of LISA. We then use these estimates to subtract the TTL noise, ensuring that any remaining TTL noise is below the current estimate of the other noise sources. We validate the procedure on simulated data for different operating scenarios. Our work shows that it is indeed possible to estimate the effect of TTL coupling and subtract it a posteriori from the TDI data streams.
UR - http://www.scopus.com/inward/record.url?scp=85136712591&partnerID=8YFLogxK
U2 - 10.1103/physrevd.106.042005
DO - 10.1103/physrevd.106.042005
M3 - Article
VL - 106
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 4
M1 - 042005
ER -