Unfortunately, these instruments do not operate at frequencies low enough to fully measure flicker noise.

For the naval target courses, one American instrument was not operating.

Its science mission officially ended five years ago, but one instrument, used to measure the intensity of charged particles, is still operating.

In this respect, these instruments operate like a harmonica.

The instrument operated from 8 to 200 keV with 6 channel resolution.

The instrument operated from 7.7 to 210 keV with 6 channels.

So neither your visual instruments nor your radar will operate.

A Leicester-built instrument has been operating in space every year since 1967.

These instruments operate by pressure lines from the Pitot head and static pressure sources.

At Neptune, nonetheless, all 11 scientific instruments, including the two television cameras, are operating.