Orbview 4 was a high resolution commercial Earth imaging satellite imagery. OrbView 4's imaging instrument was to provide one-meter panchromatic imagery and four-meter multispectral imagery. OrbView 4 was lost in an launch failure, when the Taurus-2110 carrier rocket suffered an loss of control, which was recovered, but orbit was not achieved.
American all-solid orbital launch vehicle based on a Pegasus and Peacekeeper rocket.It has been designed as a quick reaction launch vehicle, which can be launched from minimaly prepared places in a matter of a few days.