This is useful for jet plane navigation because air intakes and wings work on the velocity relative to the atmosphere. Basically the navball and the prograde/retrograde vectors will act as if the ground and atmosphere don't move. In Surface mode, in which case the prograde and retrograde vectors will account for the rotation of the pertinent celestial body. The prograde acceleration can increase the too deep periapsis increasing the speed for slingshot maneuvers, the retrograde burning can decrease the too high periapsis for reserve gravity assist or aerobraking. These directions also can be used at refinement of gravity assist maneuvers. The prograde marker is essential during the taking off and the retrograde marker during landing maneuvers, as the gravity turn main aspect is the harmonization of the acceleration and velocity vectors.
Burning in any direction other than exactly prograde or retrograde will cause the prograde/retrograde markers to move toward/away from the direction the craft is pointing.
If the level indicator is over the retrograde marker, the craft is facing "backward." As the craft orbits around a body, these markers will gradually move, because the velocity vector is constantly changing.īurning in the prograde direction will accelerate the craft, while burning retrograde will slow it down. If the prograde marker is exactly aligned with the gold level indicator, the craft is facing "forward" in the direction of travel.
Conversely, the chartreuse yellow retrograde marker always faces in exactly the opposite direction. This may not be the direction the craft is facing (which is indicated by the level indicator). The chartreuse yellow prograde marker indicates the orientation of the velocity vector of the craft relative to the point of reference it indicates in which direction the vessel is moving at that moment. This can be changed by selecting Control from Here when right-clicking on docking ports or command modules that may be on the craft. These indicators are relative to the part from which the craft is controlled, not necessarily the nearest planet, target, or orbital plane. The thin white line separating the blue and brown hemispheres is the artificial horizon. The blue background hemisphere indicates the skyward direction ("up," away from the center of gravity), while the brown indicates the opposite ("down," toward gravity). The most important part is the center ball, which shows the current orientation of the craft and multiple directions which may be important for future movements. Even when you're moving toward a target (as in a docking maneuver or losing altitude rapidly in a spaceplane), your speed will always be shown as a positive number. For this reason, speed is never negative. Speed represents the magnitude of the craft's velocity vector relative to the point of reference. Your speed is measured relative to the point of reference and is given in meters per second. For orbital maneuvers (i.e., not landing), the planet's rotation is unimportant, except in the case of a synchronous orbit, in which case the point of reference should be set to Orbit, which is like Surface but without accounting for the planet's rotation. To land on the surface of a planet or other celestial body, it is important to have the reference set to Surface to account for the rotation of the celestial body. Target mode is only available if a target is selected.
Clicking this area will toggle the point of reference between Surface, and Orbit, and Target. As all movement in space is relative, the point of reference determines the object from which all distance measurements and velocity vectors are made.
0 kommentar(er)
