•HBG 111 team operated the GSFC SLAP airborne soil moisture sensor in Spain to participate in the LIAISE irrigation study during its two-week special observation period (SOP)

•Nine science flights were flown during the SOP to capture soil conditions during planetary boundary layer formation

•Flights were coordinated with the LIAISE science team, who operated in situ soil sensors, flux towers, tethered balloons, and radiosondes from multiple locations in the science target area

•Two other non-NASA aircraft with hyperspectral imagery, in-situ turbulence, and GNSS-R sensors also flew during the campaign