The on-chip guiding system of the wide-field infrared camera at CFHT
The on-ground calibration of the Near Infrared Spectrograph (NIRSpec) instrument on-board the James Webb Space Telescope (JWST)
The on-orbit optical performance of STIS
The On-Orbit Performance of the Cosmic Origins Spectrograph
The On-orbit Performance of the Large Area Telescope on Fermi
The on-orbit performance of the STIS detectors
The on-orbit performance of WFPC2
The Online Monitor for the GLAST Calibration Unit Beam Test
The Operational Environment of the Hipparcos Mission
The operational performance of hydrogen masers in the Deep Space Network (the performance of laboratory reference frequency standards in an operational environment)
The Operational USU GAIM Model
The Optical Depth Sensor (ODS) in the DREAMS package onboard the Exomars Entry Descent and Landing Demonstrator Module
The Optical Detector Team WWW pages.
The optical modeling tools for the Canadian Very Large Optical Telescope integrated model
The optical system of the SOFIA telescope
The Optical Telescope Element Simulator for the James Webb Space Telescope
The optical/UV filters for the EPIC experiment.
The optimization of the opto-mechanical performance of the mirror segments for the E-ELT
The orbital lifetimes of Molniya satellites
The origin of the elements as seen through supernova remnants