Sodium beacon laser system for the Lick Observatory

Sodium beacon wavefront sensing for the Euro50 telescope in the presence of perspective elongation

Sodium guide star adaptive optics system for astronomical imaging in the visible and near-infrared

Sodium Laser Guide Star Experiment with a Sum-Frequency Laser for Adaptive Optics

Sodium laser guide star system at Lawrence Livermore National Laboratory: system description and experimental results

Sodium laser guide star system of ALFA [3126-05]

Sodium laser guide star technique for adaptive imaging in astronomy

Sodium layer monitoring at Calar Alto by LIDAR

Sodium-layer laser guide stars

Sodium-layer laser-guide-star experimental results.

Sodium-line emission in flares and source position relative to magnetic fields

SOFIA Education/Public Outreach with the Echelon Cross Echelle Spectrograph (EXES)

SOFIA in operation: status of the telescope in-flight commissioning

SOFIA tracking subsystem: results of assembly, operation, and calibration tests

Sofradir infrared technologies for space detectors

Soft (0.1 - 10 keV) and hard (>10 keV) x-ray multilayer mirrors for the XEUS astronomical mission

Soft X Ray Telescope (SXT) focus error analysis

Soft x-ray (2 to 6 keV) spectroscopy using gratings at extreme grazing incidence

Soft x-ray calibration for the NeXT x-ray telescope

Soft x-ray calibration of the Co/C multilayer mirrors for the Objective Crystal Spectrometer on the Spectrum Roentgen-Gamma satellite