None is needed because the Doppler measurement is an absolute measurement.
Aug 2009: Flown as a single-axis, proof-of-concept prototype on the NCAR GV during the first test flight for the ADELE/SPRITE project
Jan 2010: During the HEFT 10 project the instrument configured with the beam in-line with the fuselage. Wing motion measured with a global position system (GPS) and Inertial Navigation System (INS) unit attached to the same wing strut. Sufficient signal-to-noise to measure wind speeds at altitudes up to 7 km in clear air. Able measure winds speeds in elevated aerosol layers and/or clouds at higher altitudes. At aircraft speeds < 200 m/s the differences between the LAMS and fuselage pitot tube are less than 1 m/s. At aircraft speeds over 200 m/s differences up to 2m/s from the pitot tube measurements. It is believed that these differences are caused by errors in the pitot tube measurements.
Aug 2010: Flight tests conducted in (PREDICT) with a new 4W laser amplifier system. The prototype system had reliable performance for 14 test flights. Wind speed measurements at 50 Hz within the boundary layer and 1-Hz in clear-air up to 12.5 km altitude were demonstrated. Frequency response of the system to turbulence was shown to match the theoretical Kolmogorov inertial subrange.
November 2011: During IDEAS4 installed on the NCAR C-130 aircraft and flown as a single forward pointing instrument to test the new wing-pod subsystem and temperature-resilient fiber-based circulators. Collected data from several flights, including a five hour flight designed for wind calibration. The circular flight tracks offered the opportunity to measure an integrated quantity vorticity. Additionally, a new method to measure temperature was demonstrated with this data set utilizing the LAMS true airspeed combined with information from the pressure sensors
October 2013: The 3-beam system was flown in IDEAS on the GV
September 2015: The 4-beam system was flown in ARISTO2015 on the C-130
See the Spuler et al. paper referenced in the documentation.