Post-processed time-delay interferometry for LISA
D. A. Shaddock, B. Ware, R. E. Spero, M. Vallisneri
TL;DR
This paper presents a method for high-precision post-processed time-delay interferometry in LISA, enabling accurate signal reconstruction from phase measurements and simplifying the mission's design.
Contribution
It introduces a phase measurement interpolation technique that allows TDI to be performed in post-processing with minimal error, simplifying LISA's implementation.
Findings
Interpolation error less than 1e-8
Effective signal reconstruction from 10 Hz measurements
Simplified LISA design and operation
Abstract
High-precision interpolation of LISA phase measurements allows signal reconstruction and formulation of Time-Delay Interferometry (TDI) combinations to be conducted in post-processing. The reconstruction is based on phase measurements made at approximately 10 Hz, at regular intervals independent of the TDI delay times. Interpolation introduces an error less than 1e-8 with continuous data segments as short as two seconds in duration. Potential simplifications in the design and operation of LISA are presented.
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