Power to space use ratio for AWES could have been named power density, or simply density (MW / km² for land use, MW / km³ for space use with AWES), as is done for traditional tower wind turbines.
Data investigation of installed and output power densities of onshore and offshore wind turbines worldwide - ScienceDirect
In the introduction:
Systematic quantification of the installed power density is important because current estimates of it over land vary by a factor of 9.1, from 1.5 to 13.6 MW/km2, with a mean of 7.2 MW/km2 (Fig. 1), due to different definitions of the land area that constitutes a wind farm.
Secondary uses, such as agriculture or fishing, are easy and risk-free. Therefore, the spaces between wind turbines can be neglected when studying land or sea use, except for the fact that they impose a discontinuity.
The situation is different for AWES farms and is complicated by the length of the high traction tethers and the mobility of kite systems which depend on the direction of the wind which also enlarges the area of operation, making agriculture or fishing risky, not to mention the risk that a gust will carry everything away, the AWES dragging for kilometers.
For a single unity, the power density would be defined by the ground station (minimal footprint), plus the length of the tether as the radius of the exploitation area (gigantic footprint due to safety issues).
For an AWES farm, ground stations are extended by the length of their respective tethers, these lengths being maximum upwind (flying over the zone with ground stations) and less downwind (flying over an additional area), the AWES covering a frontal airspace shared between the units.
In addition, the yo-yo mode is limited to 4/27 for the power available in the wind. Furthermore, the reel-in recovery phase divides this limit by approximately 2, being optimistic (see Mutiny tests).