John Howard Dellinger
Encyclopedia
John Howard Dellinger was a noted American
telecommunication engineer who discovered how solar flare
s caused fadeouts of short-wave radios (the Dellinger effect
).
Dellinger was born in Cleveland, Ohio
, first attended the Western Reserve University, in 1908 received his A.B. degree from George Washington University
, and in 1913 received his Ph.D. degree from Princeton University
. From 1907-1948 Dellinger worked at the National Bureau of Standards as physicist; chief, radio section; and chief, Central Radio Propagation Laboratory. From 1928-1929 he served as chief engineer of the Federal Radio Commission
, and also served as a representative of the United States Department of Commerce
on the Radio Advisory Committee (1922–1948).
He was appointed vice-president of the International Scientific Radio Union in 1934, chairman of the Radio Technical Commission for Aeronautics
in 1941, chairman of the Radio Technical Commission for Marine Services in 1947, and chairman of Study Group 6 on Radio Propagation of the International Radio Consultative Committee in 1950.
In 1932 Dellinger was awarded the Sc.D. degree from George Washington University
, and in 1938 the IRE Medal of Honor
"for his contributions to the development of radio measurements and standards, his researches and discoveries of the relation between radio wave propagation and other natural phenomena, and his leadership in international conferences contributing to the world wide cooperation in telecommunications. The crater Dellinger
on the Moon
is named in his honor.
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
telecommunication engineer who discovered how solar flare
Solar flare
A solar flare is a sudden brightening observed over the Sun surface or the solar limb, which is interpreted as a large energy release of up to 6 × 1025 joules of energy . The flare ejects clouds of electrons, ions, and atoms through the corona into space. These clouds typically reach Earth a day...
s caused fadeouts of short-wave radios (the Dellinger effect
Dellinger effect
The Dellinger effect is a fadeout of short-wave radios, caused by increased ionization of the D region of the ionosphere due to solar flares.The effect was discovered by John Howard Dellinger...
).
Dellinger was born in Cleveland, Ohio
Cleveland, Ohio
Cleveland is a city in the U.S. state of Ohio and is the county seat of Cuyahoga County, the most populous county in the state. The city is located in northeastern Ohio on the southern shore of Lake Erie, approximately west of the Pennsylvania border...
, first attended the Western Reserve University, in 1908 received his A.B. degree from George Washington University
George Washington University
The George Washington University is a private, coeducational comprehensive university located in Washington, D.C. in the United States...
, and in 1913 received his Ph.D. degree from Princeton University
Princeton University
Princeton University is a private research university located in Princeton, New Jersey, United States. The school is one of the eight universities of the Ivy League, and is one of the nine Colonial Colleges founded before the American Revolution....
. From 1907-1948 Dellinger worked at the National Bureau of Standards as physicist; chief, radio section; and chief, Central Radio Propagation Laboratory. From 1928-1929 he served as chief engineer of the Federal Radio Commission
Federal Radio Commission
The Federal Radio Commission was a government body that regulated radio use in the United States from its creation in 1926 until its replacement by the Federal Communications Commission in 1934...
, and also served as a representative of the United States Department of Commerce
United States Department of Commerce
The United States Department of Commerce is the Cabinet department of the United States government concerned with promoting economic growth. It was originally created as the United States Department of Commerce and Labor on February 14, 1903...
on the Radio Advisory Committee (1922–1948).
He was appointed vice-president of the International Scientific Radio Union in 1934, chairman of the Radio Technical Commission for Aeronautics
Radio Technical Commission for Aeronautics
RTCA, Inc. is a volunteer organization that develops technical guidance for use by government regulatory authorities and by industry. Requirements for membership include a fee that is based on information in the application for membership, and an interest in aviation...
in 1941, chairman of the Radio Technical Commission for Marine Services in 1947, and chairman of Study Group 6 on Radio Propagation of the International Radio Consultative Committee in 1950.
In 1932 Dellinger was awarded the Sc.D. degree from George Washington University
George Washington University
The George Washington University is a private, coeducational comprehensive university located in Washington, D.C. in the United States...
, and in 1938 the IRE Medal of Honor
IEEE Medal of Honor
The IEEE Medal of Honor is the highest recognition of the Institute of Electrical and Electronics Engineers . It has been awarded since 1917, when its first recipient was Major Edwin H. Armstrong. It is given for an exceptional contribution or an extraordinary career in the IEEE fields of...
"for his contributions to the development of radio measurements and standards, his researches and discoveries of the relation between radio wave propagation and other natural phenomena, and his leadership in international conferences contributing to the world wide cooperation in telecommunications. The crater Dellinger
Dellinger (crater)
Dellinger is a lunar crater that is located on the Moon's far side. It is attached to the southern rim of the crater Pannekoek. To the southeast lies the crater Marconi, and to the southwest is Chauvenet....
on the Moon
Moon
The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...
is named in his honor.