Uploaded July 2022 | Updated September 2026, 9 hours ago
LISA interferometric arms will be unequal and time-varying due to orbital motion, coupling laser frequency noise in the observation band. Time-delay interferometry will synthesize a virtual equal-arm interferometer in post-processing to suppress this noise source contribution. This algorithm relies on pseudo-random noise (PRN) ranging estimations in-flight with an accuracy of 1 meter RMS by applying a low-depth phase modulation technique on each laser link. This technique also enables optical data communication between satellites. This talk reports on the current status of experimental developments of PRN ranging, achieving sub-meter performance levels while transferring raw data at 78125 kbps.
Authors: Kohei Yamamoto, Iouri Bykov, Pascal Grafe, Narjiss Messied, Thomas S. Schwarze, Juan Jose Esteban Delgado, German Fernandez Barranco, Gerhard Heinzel
Presenter: Kohei Yamamoto
LISA interferometric arms will be unequal and time-varying due to orbital motion, coupling laser frequency noise in the observation band. Time-delay interferometry will synthesize a virtual equal-arm interferometer in post-processing to suppress this noise source contribution. This algorithm relies on pseudo-random noise (PRN) ranging estimations in-flight with an accuracy of 1 meter RMS by applying a low-depth phase modulation technique on each laser link. This technique also enables optical data communication between satellites. This talk reports on the current status of experimental developments of PRN ranging, achieving sub-meter performance levels while transferring raw data at 78125 kbps.
Authors: Kohei Yamamoto, Iouri Bykov, Pascal Grafe, Narjiss Messied, Thomas S. Schwarze, Juan Jose Esteban Delgado, German Fernandez Barranco, Gerhard Heinzel
Presenter: Kohei Yamamoto
