Ann E. Bailie | |
|---|---|
 Ann E. Bailie, from a 1961 publication of the United States Civil Service Commission | |
| Born | Ann Eckels 1935 Littleton, New Hampshire |
| Died | 2022 |
| Occupation | Mathematician |
Dorothy Ann Eckels Bailie (born 1935) is an American mathematician who worked at Goddard Space Flight Center in the 1950s and 1960s. She was one of the three authors of the 1959 report establishing Earth's shape as asymmetrical and "pear-shaped", based on data from Vanguard 1.
Dorothy Ann Eckels was born in Littleton, New Hampshire and raised in Laconia, New Hampshire, the daughter of John C. Eckels and Dorothy R. Eckels. [1] Her father was a surgeon. Her maternal grandfather, Adolph Frederick Erdmann, was a pioneer in the field of anesthesiology. [2] [3] She earned a bachelor's degree in mathematics at Middlebury College in 1957. [4] While at Middlebury, she was elected Queen of the school's Winter Carnival, an event she co-chaired. [5]
Bailie worked at the United States Naval Research Laboratory after college. [6] By 1959 she worked in the Theoretical Division of NASA's Goddard Space Flight Center, on calculating and analyzing complex orbits for satellites. [7] She, R. Kenneth Squires, and John A. O'Keefe were the team that determined that the Earth was asymmetrical and "pear-shaped", [8] based on data from Vanguard 1. [9] [10]
James E. Webb mentioned Bailie, Nancy Roman, and Eleanor C. Pressly in his 1961 commencement speech at George Washington University, as examples of women in the space program. [11] In 1963, she was named one of the Ten Young Women of the Year by Mademoiselle magazine. [12] Later in her career, she worked at Analytical Mechanics Associates in Maryland. [6] [13]
Ann Eckels married accountant William J. Bailie in 1959. [1] They had three children. Her husband died in 2009. [26]
Vanguard 1 is an American satellite that was the fourth artificial Earth-orbiting satellite to be successfully launched, following Sputnik 1, Sputnik 2, and Explorer 1. It was launched 17 March 1958. Vanguard 1 was the first satellite to have solar electric power. Although communications with the satellite were lost in 1964, it remains the oldest human-made object still in orbit, together with the upper stage of its launch vehicle.
A trans-lunar injection (TLI) is a propulsive maneuver used to set a spacecraft on a trajectory that will cause it to arrive at the Moon.
Project Vanguard was a program managed by the United States Navy Naval Research Laboratory (NRL), which intended to launch the first artificial satellite into low Earth orbit using a Vanguard rocket. as the launch vehicle from Cape Canaveral Missile Annex, Florida.
The Goddard Space Flight Center (GSFC) is a major NASA space research laboratory located approximately 6.5 miles (10.5 km) northeast of Washington, D.C. in Greenbelt, Maryland, United States. Established on May 1, 1959 as NASA's first space flight center, GSFC employs about 10,000 civil servants and contractors. Named for American rocket propulsion pioneer Robert H. Goddard, it is one of ten major NASA field centers. GSFC is partially within the former Goddard census-designated place; it has a Greenbelt mailing address.
In astronomy, astrophysics and geophysics, a mass concentration is a region of a planet's or moon's crust that contains a large positive gravity anomaly. In general, the word "mascon" can be used as a noun to refer to an excess distribution of mass on or beneath the surface of an astronomical body, such as is found around Hawaii on Earth. However, this term is most often used to describe a geologic structure that has a positive gravitational anomaly associated with a feature that might otherwise have been expected to have a negative anomaly, such as the "mascon basins" on the Moon.
Vanguard 2 is an Earth-orbiting satellite launched 17 February 1959 at 15:55:02 GMT, aboard a Vanguard SLV-4 rocket as part of the United States Navy's Project Vanguard. The satellite was designed to measure cloud cover distribution over the daylight portion of its orbit, for a period of 19 days, and to provide information on the density of the atmosphere for the lifetime of its orbit. As the first weather satellite and one of the first orbital space missions, the launch of Vanguard 2 was an important milestone in the Space Race between the United States and the Soviet Union. Vanguard 2 remains in orbit.
Vanguard 3 is a scientific satellite that was launched into Earth orbit by the Vanguard SLV-7 on 18 September 1959, the third successful Vanguard launch out of eleven attempts. Vanguard rocket: Vanguard Satellite Launch Vehicle-7 (SLV-7) was an unused Vanguard TV-4BU rocket, updated to the final production Satellite Launch Vehicle (SLV).
The Vanguard rocket was intended to be the first launch vehicle the United States would use to place a satellite into orbit. Instead, the Sputnik crisis caused by the surprise launch of Sputnik 1 led the U.S., after the failure of Vanguard TV-3, to quickly orbit the Explorer 1 satellite using a Juno I rocket, making Vanguard 1 the second successful U.S. orbital launch.
The United States Space Surveillance Network (SSN) detects, tracks, catalogs and identifies artificial objects orbiting Earth, e.g. active/inactive satellites, spent rocket bodies, or fragmentation debris. The system is the responsibility of United States Space Command and operated by the United States Space Force.
In astronomy, perturbation is the complex motion of a massive body subjected to forces other than the gravitational attraction of a single other massive body. The other forces can include a third body, resistance, as from an atmosphere, and the off-center attraction of an oblate or otherwise misshapen body.
John Aloysius O'Keefe III (1916–2000) was an expert in planetary science and astrogeology with the National Aeronautics and Space Administration (NASA) from 1958 to 1995.
Simplified perturbations models are a set of five mathematical models used to calculate orbital state vectors of satellites and space debris relative to the Earth-centered inertial coordinate system. This set of models is often referred to collectively as SGP4 due to the frequency of use of that model particularly with two-line element sets produced by NORAD and NASA.
Nancy Grace Roman was an American astronomer who made important contributions to stellar classification and motions. The first female executive at NASA, Roman served as NASA's first Chief of Astronomy throughout the 1960s and 1970s, establishing her as one of the "visionary founders of the US civilian space program".
In astronomy, lunar orbit is the orbit of an object around the Moon.
The first orbital flight of an artificial satellite, Sputnik 1, was launched in October 1957, by the Soviet Union. In November, the second orbital flight took place. The Soviet Union launched the first animal to orbit the Earth, a dog, Laika, who died in orbit a few hours after launch.
Goddard Space Flight Center is NASA's first, and oldest, space center. It is named after Robert H. Goddard, the father of modern rocketry. Throughout its history, the center has managed, developed, and operated many notable missions, including the Cosmic Background Explorer, the Hubble Space Telescope, the Tracking and Data Relay Satellite System (TDRSS), the Lunar Reconnaissance Orbiter, and the Solar Dynamics Observatory.
Ariel 1, was the first British-American satellite, and the first satellite in the Ariel programme. Its launch in 1962 made the United Kingdom the third country to operate a satellite, after the Soviet Union and the United States. It was constructed in the UK and the United States by NASA Goddard Space Flight Center and SERC, under an agreement reached as the result of political discussions in 1959 and 1960. The US Starfish Prime exoatmospheric nuclear test affected Ariel 1's operational capability.
In orbital mechanics, a frozen orbit is an orbit for an artificial satellite in which natural drifting due to the central body's shape has been minimized by careful selection of the orbital parameters. Typically, this is an orbit in which, over a long period of time, the satellite's altitude remains constant at the same point in each orbit. Changes in the inclination, position of the apsis of the orbit, and eccentricity have been minimized by choosing initial values so that their perturbations cancel out., which results in a long-term stable orbit that minimizes the use of station-keeping propellant.
Paul D. Lowman was a geophysicist in the Geodynamics Branch of the Laboratory for Terrestrial Physics at the Goddard Space Flight Center (GSFC) in Greenbelt, Maryland. Throughout his long career, he had worked in the fields of comparative planetology, geology, neotectonics, and remote sensing.
CAMEO was a piggy-back experiment included in the Nimbus-G launch by the Goddard Space Flight Center. The primary objective of the investigation was to study the magnetosphere-ionosphere interactions by observing the dynamics of neutral (barium) and ion (lithium) clouds released at orbital velocities near the Earth. It had a mass of approximately 89 kg and consisted basically of batteries, of one lithium and four barium gas canisters. The CAMEO unit remained attached to the second stage of the Delta vehicle. This was the first opportunity to observe the behavior of conventional barium release when conducted at orbital velocity in the near-earth magnetic field.
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