The revised findings roughly coincide with readings taken from a French altimeter also aboard the Topex/Poseidon and from ground-based measurements.

Earlier, less extensive ground-based measurements had suggested that ozone over the United States had been depleted in the wintertime by about 2 percent from 1969 to 1986.

The asteroid's orbit was known before Rosettas launch, from ground-based measurements, to an accuracy of approximately 100 km.

The ground-based measurements do not cover the oceans.

In the outer solar system this effect would be easily calculable, based on ground-based measurements of the deep space environment.

Comparison with the ground-based measurements suggests to some researchers that the satellite calibration has drifted over the past eight years.

The area surrounding the Station was covered with metal warehouses, transformers, and power cables, which meant that a ground-based measurement of the B-field would be worse than useless.

Ida is classified as an S-type asteroid based on ground-based spectroscopic measurements.

Critics note that evidence for the observed global warming trend ofthe 1980's depends on ground-based measurements of temperature, which amount to only a sampling of the whole earth.

The atmospheric effect can be removed with Langley extrapolation; this method therefore allows measuring the solar extraterrestrial radiance with ground-based measurements.