As the previous test was at mast height, confirmation from SkySails of the reference height would be welcome, as for the kite area for both tests. See also the last link.
Could the reference height be the middle of the pattern height, in order to match the reference height (see just below) of a conventional wind turbine?
Wind Speeds
Reference / Rated wind speed
Definition: Minimum wind speed at pattern trajectory height at which an AWES’ rated power is achieved in the case of steady wind without turbulence.
Notes:
- IEC 61400-1: “minimum wind speed at hub height at which a wind turbine’s rated power is achieved in the case of steady wind without turbulence.”
- Default: When not explicitly stated when referring to wind speeds, one can assume it refers to the rated wind speed.
- One point on the power curve (see graph in Power Curve)
- Basic parameter for wind speed used for defining AWES classes
- Can be measured with LIDAR and is standard. ERA5 provides wind speed at 100m as a standard output. Good data availability and comparable to conventional WTG hub heights.