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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

The interest of a ground based Slit Aperture Telescope(SAT) which operates with a long thin pupil has been underlined for applications in the field of high angular resolution observations by speckle-interferometric techniques. The SAT lies halfway between the Michelson stellar interferometer and the standard telescope with circular aperture. The authors present the principle of an image processing algorithm which could be used associated with a space-SAT for astronomical image reconstruction. A full coverage of the two dimensional Fourier plane of the astronomical object can be obtained by rotating the SAT around its optical axis. The method of image reconstruction is analogous to those used in computerized tomography and uses Fast Fourier Transform algorithm. The interest of the use of a rotating space-SAT among synthetic apertures is its capability of giving a reconstructed image of the astronomical object simultaneously in several light wavelengths, each colored image being comparable with the others for fruitful astrophysical applications.  3, record 1, English, - slit%20aperture%20telescope

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Le télescope à pupille fente fournit des images unidimensionnelles et opère en synthèse d'ouverture. En l'absence de turbulence atmosphérique, l'image focale fournie par un télescope à pupille fente est quasiment une projection unidimensionnelle de l'objet observé. Après une rotation complète autour de son axe optique, on obtient un ensemble de projections de l'objet observé qui n'est autre que la transformée de Radon de l'objet.  1, record 1, French, - t%C3%A9lescope%20%C3%A0%20pupille%20fente

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A setting found on zoom lenses that allows no change in aperture over the full focal length range.  2, record 2, English, - fixed%20aperture

Record number: 2, Textual support number: 1 OBS

Usually photographers can set exposure at the widest aperture and zoom through without slowing shutter speed.  2, record 2, English, - fixed%20aperture

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Réglage d'un objectif zoom qui bloque l'ouverture pour toute la gamme de distances focales.  2, record 2, French, - ouverture%20fixe

Record number: 2, Textual support number: 1 OBS

Normalement, les photographes utilisant un objectif zoom font la mise au point à la plus grande ouverture et font varier la focale sans réduire la vitesse de l'obturateur.  2, record 2, French, - ouverture%20fixe

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

To minimize potential voids, it is better to sample an area with multiple looks.  2, record 3, English, - multiple%20looks

Record number: 3, Textual support number: 1 OBS

Radar terminology refers to individuals "looks" as groups of signal samples in a SAR processor that splits the full synthetic aperture into several sub-apertures, each representing an independant "look" of the identical scene. The resulting image formed by incoherent summing of these "looks" is characterized by reduced speckle and degraded spatial resolution.  3, record 3, English, - multiple%20looks

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Visées d'une scène sous différents angles.  2, record 3, French, - vis%C3%A9es%20multiples

Record number: 3, Textual support number: 1 OBS

La terminologie radar définit les visées individuelles comme des paquets d'échantillons de signal dans un processeur SAR qui divisent l'ouverture synthétique totale en plusieurs sous-ouvertures, chacune représentant une visée individuelle de la même scène. L'image résultante est formée de la somme incohérente de ces visées et se caractérise par un chatoiement réduit et une résolution spatiale dégradée.  3, record 3, French, - vis%C3%A9es%20multiples

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

In wave mode, the ASAR [advanced synthetic aperture radar] instrument, measures changes in backscatter from the sea surface due to ocean wave action. Therefore it generates vignettes... The position of the wave vignette across track being selected as either constant or alternating between two across-track positions over the full swath range.  3, record 4, English, - wave%20vignette

Record number: 4, Textual support number: 2 CONT

Due to the reduced size of the imagettes compared to normal ASAR [advanced synthetic aperture radar] images, each Wave Mode Geolocation Annotation Data Set Record (ADSR) contains only the geodetic latitude and longitude of the centre point of the imagette. One ADSR is produced for each wave cell.  4, record 4, English, - wave%20vignette

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

A drum fitted with a detachable head, which, after removal, provides an aperture usually of the full diameter of the receptacle. The head is secured in position on the drum by a closing ring, clips or other devices.  1, record 5, English, - removable%20head%20metal%20drum

Record number: 5, Textual support number: 1 OBS

See figs. 24 to 25 in UNP-1, 1973, pp. 49 and 51.  2, record 5, English, - removable%20head%20metal%20drum

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish