The phrase "a ground reference" is correct and usable in written English.
It can be used in contexts related to navigation, aviation, or any field where a fixed point of reference on the ground is needed for orientation or measurement.
Example: "The pilot used a ground reference to maintain altitude during the flight."
Alternatives: "a reference point" or "a fixed reference".
On the other hand, since motion parameters of the receiver platform are precisely known, we can compensate for the range migration due to its movement [15] about a ground reference position in close vicinity of the actual position of targets, referred to as scene origins.
A ground reference was undertaken with the same biological setup with a delay of 4 d.
In addition, a ground reference electrode from the array device was bundled firmly on all the skull screws.
We used a separate ground reference screw for the left and right hemisphere.
This quiet zone, called the "Cone of Silence", signified to the pilots that the aircraft was directly overhead the station, serving as a positive ground reference point for the approach procedure.
We used historical Farm Service Agency records as a source of ground reference data to classify a late summer 1984 satellite image into crop species in a three-county area in south central Nebraska.
In order to study the effect of microgravity on the operation of CAES, a 1g centrifuge reference group in space, a ground 1g reference group and a ground 1g centrifuge reference group (1.4g group) were run concurrently.
We utilize a recently completed ground reference vegetation data set extending over 12,000 km2 in Denali National Park and Preserve, Alaska to model the abundance of usnic lichen and other forage vegetation groups.
The two ends of the coil are differentially fed (with a common ground referenced to the receiver shield) to a Stanford Research Systems preamplifier model SR650.
We utilized Landsat Thematic Mapper images from 2010 and 2011, and a robust collection of ground reference data developed from aerial photography, supported by field verification (vegetation sampling) where access permitted, to construct a thematic map of 11 land cover classes.
The simplest form of flight control is called the visual flight rule, in which pilots fly with visual ground reference and a "see and be seen" flight rule.
