Post-processed time-delay interferometry for LISA
  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. 
D. A. Shaddock, B. Ware, R. E. Spero, M. Vallisneri