The Ebright Azimuth is the point with the highest benchmark monument elevation in the U.S. state of

Delaware Delaware ( ) is a state in the Mid-Atlantic region of the United States, bordering Maryland to its south and west; Pennsylvania to its north; and New Jersey and the Atlantic Ocean to its east. The state takes its name from the adjacen ...

. It is marked with a geodetic benchmark monument and has an elevation of above sea level. The only state high-point with a lower elevation is

Britton Hill Britton Hill is the highest natural point in the state of Florida, United States, with a summit elevation of above mean sea level. Britton Hill is the lowest state highpoint in the United States,

in the state of Florida at above sea level.

Description

The Ebright Azimuth is located about north of downtown Wilmington,

, in far northern New Castle County, within a few feet of the Pennsylvania state line. It is near Concord High School, to the north of Naamans Road, at the middle of the intersection of Ebright Road and Ramblewood Drive. This is an entrance to the Dartmouth Woods development. Surveying by

Delaware Geological Survey The Delaware Geological Survey (DGS) is a scientific agency for the State of Delaware, located at the University of Delaware (UD) which conducts geologic and hydrologic research, service, and exploration. The mission of the DGS is to provide objec ...

personnel indicates that the mobile home park just west of Ebright Road is at least higher than the benchmark. Ebright Azimuth is named after James and Grant Ebright, who owned the property on which the benchmark was placed. An

azimuth An azimuth (; from ar, اَلسُّمُوت, as-sumūt, the directions) is an angular measurement in a spherical coordinate system. More specifically, it is the horizontal angle from a cardinal direction, most commonly north. Mathematicall ...

is an angular measurement in a spherical coordinate system. Since the schematic photograph was taken the blue and yellow monument sign has been moved across the street closer to the

geodetic marker Survey markers, also called survey marks, survey monuments, or geodetic marks, are objects placed to mark key survey points on the Earth's surface. They are used in geodetic and land surveying. A '' benchmark'' is a type of survey marker that ...

. A curb extension has been installed, and the area around the sign has been modestly landscaped.

Radio tower history

The self-supporting radio tower just south of the benchmark was constructed in 1947 by Western Union as part of a historic C-band

microwave radio relay Microwave transmission is the transmission of information by electromagnetic waves with wavelengths in the microwave frequency range of 300MHz to 300GHz(1 m - 1 mm wavelength) of the electromagnetic spectrum. Microwave signals are normally lim ...

system that linked New York City and Washington, D.C. This site was assigned the name "Brandywine" in recognition of Brandywine Creek located several kilometers to the west and was licensed with the call sign KGB29. Western Union's engineers specified a heavy-duty prefabricated fire tower structure, which allowed the microwave transmitters and receivers to be installed inside the cab. "Dish" antennas, mounted behind the window openings, were aimed towards the adjacent relay stations at

Mt. Laurel, New Jersey Mount Laurel is a township in Burlington County in the U.S. state of New Jersey. It is a suburb of Philadelphia and part of the South Jersey region. As of the 2010 U.S. census, the township's population was 41,864, reflecting an increase of 1 ...

, to the northeast, and Elk Neck near Elkton, Maryland, to the southwest. Like most of their early microwave relay sites, Western Union decommissioned the Brandywine installation near Ebright Azimuth as more-reliable broadband fiber systems were developed. The structure now supports several

VHF Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF ...

and

UHF Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one tenth of a meter (on ...

land mobile radio A land mobile radio system (LMRS) is a person-to-person voice communication system consisting of two-way radio transceivers (an audio transmitter and receiver in one unit) which can be stationary ( base station units), mobile (installed in vehicl ...

antennas.

References

External links

* {{U.S. State Highest Points Landforms of Delaware Landforms of New Castle County, Delaware Highest points of U.S. states

Description

Radio tower history

See also

References

External links