Forces on sails to stay within the limitations of a craft's stability and power requirements, which are functions of hull (for boats) or chassis (for land craft) design. Sails derive power from wind that varies in time and with height above the surface. In order to do so, they are designed to adjust to the wind force for various points of sail. Both their design and method for control include means to match their lift and drag capabilities to the available apparent wind, by changing surface area, angle of attack, and curvature. Wind speed increases with height above the surface; at the same
MESO-SAILS MESO-SAILS led to an enhancement in detection and possibly an increased effective range at which TDS’s could be detected. The use of MESO-SAILS dropped to 41% during severe thunderstorms watches however, which may suggest some benefit in keeping MESO-SAILS active during severe thunderstorm watches as well. MESO-SAILS Multiple Elevation Scan Option for Supplemental Adaptive Intra-Volume Low-Level Scan (abbreviated MESO-SAILS), is a dynamic scanning option for the WSR-88D, controllable by the operator of the radar, when in VCP mode 12 and 212, and additionally 35 and 215 with the Build 18 update scheduled for October 2017. When active, one supplemental low-level