The United States Naval Observatory (USNO) is one of the oldest scientific agencies in the United States, with a primary mission to produce Positioning, Navigation, and Timing (PNT) for the U.S. Navy and the U.S. Department of Defense. Located in Northwest Washington, D.C., it is one of the pre-1900 astronomical observatories located in an urban area; at the time of its construction, it was far from the light pollution thrown off by the (then-smaller) city center. Today, the observatory's primary observational work is done at the U.S. Navy's higher elevation United States Naval Observatory, Flagstaff Station (NOFS) near Flagstaff, Arizona. USNO also has an "Alternate Master Clock" site in Colorado Springs, CO which, with the "Master Clock", provides precise time to the GPS satellite constellation run by the U.S. Air Force; and it performs radio VLBI-based positions of quasars with numerous global collaborators, in order to produce Earth Orientation parameters. Aside from its scientific mission, since 1974, the Observatory is the official residence of the Vice President of the United States.
Read more about United States Naval Observatory: History, Departments, Time Service, Publications
Famous quotes containing the words united states, united, states, naval and/or observatory:
“The United States have a coffle of four millions of slaves. They are determined to keep them in this condition; and Massachusetts is one of the confederated overseers to prevent their escape.”
—Henry David Thoreau (1817–1862)
“You may consider me presumptuous, gentlemen, but I claim to be a citizen of the United States, with all the qualifications of a voter. I can read the Constitution, I am possessed of two hundred and fifty dollars, and the last time I looked in the old family Bible I found I was over twenty-one years of age.”
—Elizabeth Cady Stanton (1816–1902)
“On 16 September 1985, when the Commerce Department announced that the United States had become a debtor nation, the American Empire died.”
—Gore Vidal (b. 1925)
“The world was a huge ball then, the universe a might harmony of ellipses, everything moved mysteriously, incalculable distances through the ether.
We used to feel the awe of the distant stars upon us. All that led to was the eighty-eight naval guns, ersatz, and the night air-raids over cities. A magnificent spectacle.
After the collapse of the socialist dream, I came to America.”
—John Dos Passos (1896–1970)
“Where there is an observatory and a telescope, we expect that any eyes will see new worlds at once.”
—Henry David Thoreau (1817–1862)