Earlier infrared observations had been made by both space-based and ground-based observatory.

This is accomplished by using the satellite in conjunction with ground-based observatories and interferometry techniques.

Optical and radio astronomy can be performed with ground-based observatories, because the atmosphere is relatively transparent at the wavelengths being detected.

For optical telescopes, most ground-based observatories are located far from major centers of population, to avoid the effects of light pollution.

Lafrenière adapted an image reconstruction technique that was first developed for ground-based observatories.

Because it orbits outside the Earth's atmosphere, it sees things ground-based observatories can't.

They alerted eight other orbiting and ground-based observatories to record the event.

It will be capable of looking seven times more deeply into space and with greater clarity than the best ground-based observatory.

Any ground-based observatory that had two mirrors in preparation would have compared the two and taken the best.

This program, using ground-based observatories, is budgeted at $4.1 million a year through 2012.