Fr.: auto-, aut-
Gk., from autos "self, one's own," of unknown origin.
Xod-, from xod "self," Av. hva- "self, own."
1) In radio astronomy, a process performed by an → autocorrelator.
Autocorrelation, from → auto- "self" + → correlation.
Xod-hambâzâneš, from xod- "self" + hambâzâneš, → correlation.
Fr.: fonction d'autocorrélation
A mathematical function that describes the correlation between two values of the same variable at different points in time.
In radio astronomy, a spectrograph which correlates the signal with itself with various time delays, and extracts the frequency spectrum of the signal. → correlator.
Fr.: fonction d'autocovariance
The autocovariance function (ACF) is defined as the sequence of
covariances of a stationary process.
xodrâhbar, râhbar-e xodkâr
An electronic equipment used to automatically guide a telescope during long exposures.
Autoguider from → auto- "self" + guider, from O.Fr. guider "to guide, lead, conduct," from Germanic origin; akin to O.E. wltan "to look after" witan "to know," akin to O.H.G. wizzan "to know," L. videre "to see," Gk. eidenai "to know," idein "to see," Av. vaêd- "to know," Skt. veda "knowledge; finding."
Xodrâhbar from xod-, → auto + râhbar "guide," from râh "way" + bar, from bordan "to lead."
xodrâhbord, râhbord-e xodkâr
The act or process of guiding a telescope automatically.
Having a self-acting or self-regulating mechanism.
From Gk. automatos "self-acting," from → auto- + matos "willing," from PIE *men- "to think;" compare with Av./O.Pers. man- "to think."
Xodkâr from xod-, → auto-, + kâr "acting, actor," from kardan "to do, act."
automatic photometric telescope
durbin-e šidsanjik-e xodkâr, teleskop-e ~ ~
Fr.: télescope photométrique automatique
A telescope developed to perform photometric observations automatically.
1) Self-governing; independent; subject to its own laws only; having autonomy.
Adjective from → autonomy.
1) Independence or freedom, as of the will or one's actions.
Fr.: autocorrélateur optique
An instrument used to test lenses by utilizing the → optical transfer function. It consists of a HeNe laser, a beamsplitter and two mirrors.
1) Needless repetition of an idea, especially in words other than those
of the immediate context, without imparting additional force or
clearness, as in "lifeless dead."
L.L. tautologia "representation of the same thing in other words," from Gk. tautologia, from tautologos "repeating what has been said," from tauto "the same" (contraction of to auto "the same," from to "the" + → auto + -logos "saying," related to legein "to say," → -logy.
Hamân "same" (Mid.Pers. ham "same; also; together," → com-) + ân "that."