Abstract. We present Hubble Space Telescope ultraviolet observations

revisions in the design for a high-resolution multi-element

frame. A novel observation model based on motion compensated subsampling is proposed for a video sequence. Since the reconstruction problem is ill-posed, Bayesian restoration with a discontinuity-preserving prior image model is used to extract a high-resolution video still given a short low-resolution

The high resolution spectrograph of the TNG (SARG) was projected to cover a spectral range from A=O.37 up to 0.9 pm, with resolution ranging from R=l9,000 up to R=144,000. The dispersing element of the spectrograph is an R4 echelle grating in Quasi-Littrow mode; the beam size is 100 mm giving an RS

Hermes, a high-resolution fiber-fed echelle spectrograph is currently under development for the 1.2-meter Mercator Telescope at the Roque de Los Muchachos observatory on La Palma. The optical design is based on a large R2.6 echelle grating, operating in quasi-Littrow and white-pupil configuration

We report the detection of atomic chlorine emissions in the atmosphere of Io using

variability is on the biosphere, including humans. The ‘‘average’ ’ rainfall is rarely observed. Instead, several seasons of drought and starvation are often followed by a year or two of torrential downpours and disastrous floods. Quantitative estimates of tropical precipitation, unfortunately, still vary

, the spatial resolution is essential. Understanding the physical processes related to theses structures relies generally on getting spectrographic information at high spatial resolution. This goal is now reachable thanks to the success of the adaptive optics. Today, the main problem is not to get the maximum

at the Starfire Optical Range (SOR) 1.5 m telescope (Woolf et al. 1995; Ge et al. 1996). To our knowledge this is the first high resolution spectrograph to take advantage of the diffraction limited images produced by an adaptive optics system. Because of the sharpened images produced by the adaptive optics

Externally dispersed interferometry (EDI) is a technique for enhancing the performance of spectrographs for wide band-width high resolution spectroscopy and Doppler radial velocimetry. By placing a small angle-independent interferometer near the slit of a spectrograph, periodic fiducials