Você procurou por: anisoplanatismo (Espanhol - Inglês)

es decir, los errores de anisoplanatismo de tilt entre la dirección del objeto astronómico y la estrella natural de referencia pueden obligar a un aumento del ancho de banda del servo global. si los cambios bruscos se ignoran, la eficacia de los sistemas de óptica adaptativa cae dramáticamente.
that is to say, the errors of tilt anisoplanatism between the direction of the astronomical object and the natural guide star can force to increase the bandwidth global servo. if the abrupt changes are ignored, the efficiency of the ao systems falls dramatically.

la altura donde se producen es fundamental, especialmente para telescopios grandes, ya que, al crearse a una altura finita respecto a la distancia del objeto astronómico, se origina un error (denominado efecto cono o anisoplanatismo focal) que es la diferencia entre la propagación en forma de cono de la lgs y la forma cilíndrica del objeto. se hace evidente, entonces, que este error será menor con alturas de lgs mayores, pero su efecto será más importante para telescopios de diámetro mayor (tallon & foy, 1990).
the height where they take place is fundamental, especially for large telescopes, because when being created to a finite height with respect to the distance of the astronomical object, an error is originated (denominated cone effect or focal anisoplanatism) due to the difference between the propagation in conic form of the lgs and the propagation in cylindrical form of the object. then, it becomes evident that this error will be smaller with greater heights of lgs, but its effect will be more important for telescopes of larger diameter (tallon & foy, 1990).on the other hand, the sodium layer in the mesopause is not constant, showing variations of abundance, height and the existence of sporadic layers.