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Boulder

Ralph Orwick bending over a tungsten electrode welder

Welding for Ultrahigh Vacuum

April 3, 2017

April is National Welding Month, a time dedicated to highlighting accomplishments in this important field. At NIST in the 1960s, Ralph Orwick of the NIST

The Story of an Old Timer: Phase Modulation (PM)

First we increased the depth of the amplitude modulation. This increased the reception capability by a few db - but didn't solve the...

The Story of an Old Timer: New Transmitters

Throughout the 1960s, 1970s and 1980s, disciplined oscillators were manufactured receiving the WWVB signal and delivering better than 1 part...

The Story of an Old Timer: 1970s

Then on July 1, 1971, WWVH began broadcasting at the new facility on the Navy's PMRF site on the island of Kauai. One year after WWVH moved...

The Story of an Old Timer: QSL cards

A first day QSL card acknowledging receipt of the broadcast were issued for those who correctly identified the new voice announcement and...

The Story of an Old Timer: 1960s

In April 1960, WWVL broadcast began with 1,000 times more stable reception at a distance than WWV or WWVH had been received. So in 1962...

The Story of an Old Timer: 1950 - 1954

On January 1, 1950 voice announcements were added to all broadcasts - the familiar "at the sound of the tone ...". In January 1953 the 30...

The Story of an Old Timer: WWVH

On November 22, 1948 WWVH began at Kihei on the island of Maui operating at 5, 10 and 15 MHz.

The Story of an Old Timer: Out of Room (part 3)

The wooden transmitter building burned to the ground on November 6, 1940. After the fire Congress allocated $230K for a new brick station...

The Story of an Old Timer: Out of Room (part 2)

In January 1931 WWV was moved to a field station at College Park, Maryland, northeast of Washington. WWV was only there for two years and...

The Story of an Old Timer: Out of Room

The Connecticut Avenue grounds were running out of room. So they started operating field stations to perform tests.

The Story of an Old Timer: Higher Frequencies

In March 1923, WWV started broadcasting standard frequencies, 200 kHz, 300 kHz, and 545 kHz. But research was pushing for higher frequencies...

2011 Presidential Rank Award - Judah Levine

The award recognizes Levine as a world leader in early applications of lasers for precision measurements, as well as precision time and

2012 Award for Biological Sciences - Jeeseong Hwang

Jeeseong Hwang received the award "in recognition of contributions to research and service in the field of biomedical optics, specifically

2011 Arthur S. Flemming Award - Till Rosenband

He invented an entirely new technology—the "logic clock." It is the world's most accurate atomic clock with an uncertainty equivalent to one

1st North American Conference on Trapped Ions

March 20, 2017

The Ion Storage group at NIST Boulder will be holding a new Ion Trap Conference at our laboratory. The conference will be similar in scope and aims to the

NIST USNO 2016 Archive

UTC (USNO) - UTC (NIST) The United States Naval Observatory (USNO) and the National Institute of Standards and Technology (NIST) make...

NIST UTC 2016 Archive

UTC - UTC (NIST) The deviation of UTC(NIST) from UTC has been less than +/-100 ns since July 6, 1994. The table below shows values of UTC -...

The Photoforce Project

High-power continuous wave lasers (also known as “high-energy” lasers) are increasingly common in manufacturing (welding, cutting, and metal additive

ACMD Seminar: Analysis on fractals: An introduction

Dr. Kasso Okoudjou, Professor and Associate Chair Department of Mathematics, University of Maryland Tuesday, April 11, 2017, 15:30 - 16...

ACMD Seminar: Methods of mathematical physics applied to practical radiometry

Dr. Eric L. Shirley, Physicist Sensor Science Division, PML, NIST Friday, March 31, 2017, 15:00 - 16:00Building 101, Lecture Room...

John Kitching receives 2017 FLC Technology Transfer Award

As a result of innovation developed at the National Institute of Standards and Technology (NIST) and in collaboration with partners in the

The Story of an Old Timer: Radio Landing Aid

Here's a picture in May 1927 as they prepared to experiment with this new radio landing aid. That is Dellinger on the left and Dunmore to...

The Story of an Old Timer: Navigation by Radio Signal

Top right, a model of using radio signals for "fog" navigation for ships at sea developed by the Radio Section built all along the seashore...

The Story of an Old Timer: Radio Section Staff, 1924

So by November 1924, the staff of the Radio Section had been reduced to 14 permanent members and another dozen guest researchers and...

The Story of an Old Timer: Golden Age of Radio

If the Radio Section had pioneered the adventure series - the radio comedy and the "commercial" (for soap) and other products - they would...

The Story of an Old Timer: New Radio Building

In October of 1918, one month before the end of the war, the Radio Section moves into the new Radio Building (the last piece of available...

interests served by Radio Laboratory of NBS

The Story of an Old Timer: End of the Great War

After the end of the Great War, this wheel chart shows the varied and extensive interest of Radio Section. Dr. Crittenden, as Division Chief...

The Story of an Old Timer: Women in Science

Here's a picture of Dr. Louise McDowell, Professor of Physics at Wellesley College, conducting experiments (in late 1918) at NBS on...

The Story of an Old Timer: Shielding Techniques

Great progress was also made in shielding techniques - both in receiving and transmitting. To the right is a picture of a shielded cage room...

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