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Harmonically excited orbital variations
Rephrasing the equations of motion for orbital maneuvers in terms of Lagrangian generalized coordinates instead of Newtonian rectangular cartesian coordinates can make certain harmonic terms in the orbital angular momentum vector more readily apparent. In this formulation the equations of motion adopt the form of a damped harmonic oscillator when torques are applied to the orbit in a variationally prescribed manner. The frequencies of the oscillator equation are in some ways unexpected but can nonetheless be exploited through resonant forcing functions to achieve large secular variations in the orbital elements. Two cases are discussed using a circular orbit as the control case: (1) large changes in orbital inclination achieved by harmonic excitation rather than one impulsive velocity change, and (2) periodic and secular changes to the longitude of the ascending node using both stable and unstable excitation strategies. The implications of these equations are also discussed for both artificial satellites and natural satellites. For the former, two utilitarian orbits are suggested, each exploiting a form of harmonic excitation. 5 refs.
Date:
August 6, 1985
Creator:
Morgan, T.
Object Type:
Article
System:
The UNT Digital Library
[News Clip: Double Homocide]
Video footage from the WBAP-TV station in Fort Worth, Texas, to accompany a news story by reporter Jack Kelso about the murder of Myra Pitts, an employee of Trailways Bus Systems, and her 8-year-old son Christopher. This story includes footage of their covered bodies being removed their apartment and a helicopter searching for the woman's missing car. This story aired at 6:00 P.M.
Date:
May 6, 1985
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Tarrant County commissioner]
Video footage from the WBAP-TV station in Fort Worth, Texas, to accompany an unknown news story. This footage includes the exterior of the InterFirst building and an interview with an unidentified man. This story aired at 6:00 P.M.
Date:
May 6, 1985
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Sulfur Evacuation]
Video footage from the WBAP-TV station in Fort Worth, Texas, to accompany a news story about a sulfur evacuation. This b-roll footage includes aerial footage. This story aired at 5:00 P.M.
Date:
January 6, 1985
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Train/Ped.]
Video footage from the WBAP-TV station in Fort Worth, Texas, to accompany a news story about a fatal train versus pedestrian accident.This b-roll footage includes a covered body on the railroad tracks and witnesses observing the body being taken away by ermergency personnel. This story aired at 12 P.M.
Date:
May 6, 1985
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Bob Hope]
Video footage from the WBAP-TV station in Fort Worth, Texas, to accompany a news story by Bobbie Wygant about Bob Hope who performed the previous evening with the Kilgore Rangerettes and recently wrote a book, "Confessions of a Hooker: My Lifelong Affair with Golf.". This story includes footage of Hope singing onstage to the applause of the Rangerettes and an interview with Wygant about golfing and the Bing Crosby golf tournament. This story aired at 5:00 P.M.
Date:
May 6, 1985
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Murder Chance]
Video footage from the WBAP-TV station in Fort Worth, Texas, to accompany a news story by reporter Alan Laughlin about a justice department study concerning the chance Americans have of being murdered in their lifetime which is further divided into white men, white women, black men, and black women. The story includes an interview with Texas Christian University research director Pat Miller concerning the statistics and impact of United States handgun police versus those of other countries, covered bodies being loaded into ambulances, homicide scenes, college students, a woman at a shooting range, and people buying handguns. This story aired at 6:00 P.M.
Date:
May 6, 1985
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Masters]
Video footage from the WBAP-TV station in Fort Worth, Texas, to accompany a news story about tornado damage in Pleasant Grove, Texas. The story includes footage of storm damage and debris, an interview with Isabel Rodriguez whose husband was trapped by a tree, children singing, and an interview with a parent. This story aired at 10:00 P.M.
Date:
May 6, 1985
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Sex Ring]
Video footage from the WBAP-TV station in Fort Worth, Texas, to accompany a news story about the arrest of five men in relation to sexually abusing four underage girls in the subdivision of Hoop and Holler in Liberty County. The story includes footage of the girls' trailer home and interviews with neighbors about their efforts to get the abuse investigated. This story aired at 6:00 P.M.
Date:
June 6, 1985
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
The Tulia Herald (Tulia, Tex.), Vol. 77, No. 23, Ed. 1 Thursday, June 6, 1985
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
June 6, 1985
Creator:
Tooley, Wendell
Object Type:
Newspaper
System:
The Portal to Texas History
[Minutes for the TXSSAR Board of Managers Meeting: March 9, 1985]
Minutes from a meeting of the TXSSAR Board of Managers, held on March 9, 1985, in San Antonio, Texas, including a summary of activities and business discussed. The meeting was called to order and presided by President Brandau, and introduced new guests in attendance.
Date:
March 6, 1985
Creator:
Sons of the American Revolution. Texas Society.
Object Type:
Text
System:
The UNT Digital Library
[News Clip: UTA/Nedderman]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
December 6, 1985, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Merkur]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
February 6, 1985, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Firemen]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
March 6, 1985, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Age 21 drinking]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
February 6, 1985, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Arlington pickaxe]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
January 6, 1985, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Betatron motion and optical deflection in free electron lasers
Transverse displacement of the electron beam at input to the wiggler induces betatron oscillation, imparting a sinusoidal transverse displacement to the gain medium seen by the optical beam. As the light propagates down this ''rippled'' medium it is guided by the dispersion, thereby acquiring some transverse sinusoidal displacement. At output from the wiggler the optical beam in general has acquired some transverse component of velocity, that is, it propagates off-axis. As the e-beam displacement fluctuates statistically with every pulse, the optical output direction jitters around the nominal axis. The jitters is estimated with a model that includes off-axis optical propagation through a ''rippled'' gain medium but neglects feedback of the off-axis light on the e-beam. The model is solved in perturbation theory. The jitter is calculated at the final aperture of the optical system beyond the wiggler. 8 refs., 13 figs.
Date:
October 6, 1985
Creator:
Karr, T.J.
Object Type:
Report
System:
The UNT Digital Library
The Ingleside Index (Ingleside, Tex.), Vol. 36, No. 17, Ed. 1 Thursday, June 6, 1985
Weekly newspaper from Ingleside, Texas that includes local, state, and national news along with advertising.
Date:
June 6, 1985
Creator:
Fischer, Tim
Object Type:
Newspaper
System:
The Portal to Texas History
[News Clip: NAACP]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
January 6, 1985, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Aids sidebar]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
March 6, 1985, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Gazebo]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
March 6, 1985, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
The Cherokeean. (Rusk, Tex.), Vol. 136, No. 17, Ed. 1 Thursday, June 6, 1985
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
June 6, 1985
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Rio Grande Herald (Rio Grande City, Tex.), Vol. 39, No. 31, Ed. 1 Thursday, June 6, 1985
Weekly newspaper from Rio Grande City, Texas that includes local, state and national news along with extensive advertising.
Date:
June 6, 1985
Creator:
Roberts, Kenneth
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Register, Volume 10, Number 90, Pages 4667-4718, December 6, 1985
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
December 6, 1985
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History