In aircraft literature, what does cross-track and along-track wind directions mean? Please explain in terms of the aircraft's motion relative to the wind direction. I can hazard a guess: along-track is wind in the direction of the aircraft's velocity, and cross-track would be perpendicular side-to-side (or is it top-bottom) wind direction wrt to aircraft velcoity direction? Not sure...some explanation and clarification would help. Thanks.
The "track" is the intended travel path over the ground from the origin to the destination. Cross-track wind is the wind perpendicular to this line (crosswind), and along-track wind is the headwind/tailwind component.