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Orbview-1 Autonomous Mission Operations, Susan Kennison Sep 1997

Orbview-1 Autonomous Mission Operations, Susan Kennison

Small Satellite Conference

The Orbview-1 spacecraft was launched in April, 1995. It is a small, low-orbiting satellite with two scientific payloads, the Optical Transient Detector (OTD) and the GPS Meteorological instrument (GPS-Met). The Orbview-1 mission was developed in alignment with NASA's directive of "cheaper, better, faster" satellite programs. An important element in achieving these goals is the reduction in operations cost through spacecraft automation. A highly autonomous satellite minimizes the amount of human interaction required once the spacecraft is on-orbit. In alignment with this philosophy, the Orbview-1 Mission Operations have also been increasingly automated. This process has led to reduction of operating costs, …

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Development Of An Automatic Beacon Receiver Ground Station For Spacecraft Health Monitoring, Alex Kiragu, Penelope Harris, Ben Oni Sep 1997

Development Of An Automatic Beacon Receiver Ground Station For Spacecraft Health Monitoring, Alex Kiragu, Penelope Harris, Ben Oni

Small Satellite Conference

The Tuskegee Satellite Systems (TSS) group, in conjunction with the Stanford Space Systems Development Laboratory (SSDL) has initiated the development of a spacecraft health monitoring ground station prototype. This TSS prototype will serve as a scholastic and commercial testbed for further spacecraft healthy research and operations. Fully automatic with only periodic inspection by a local operator, the TSS station will serve as a model for remote and unmanned ground stations. In tandem, replicas of the station will be exported to selected global locations. Linked to the Mission Control Centre at Stanford via the internet, these stations will provide 24 hour …

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Predicting Failures And Estimating Duration Of Service Life From Satellite Telemetry, Len Losik, Lewis Owen, Sheila Wahl Sep 1997

Predicting Failures And Estimating Duration Of Service Life From Satellite Telemetry, Len Losik, Lewis Owen, Sheila Wahl

Small Satellite Conference

This paper addresses research completed for predicting hardware failures and estimating remaining duration of service life for satellite components using a Failure Prediction Process (FPP) as envisioned by the University of California Berkeley, Center for Extreme Ultraviolet Astrophysics (CEA). It is a joint paper, presenting initial work completed at the CEA using telemetry from the EUV EXPLORER (EUVE) satellite and statistical computation analysis completed by Lockheed Martin. This work was used in identifying suspect "failure precursors" and is followed by a Lockheed Martin exploration into the application of statistical pattern recognition methods to identify FPP events observed visually by the …

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Autonomous Mission Planning For Spin-Stabilized Science Satellites, Birgit Sauer, Michael Ricard Sep 1997

Autonomous Mission Planning For Spin-Stabilized Science Satellites, Birgit Sauer, Michael Ricard

Small Satellite Conference

When reducing the operations costs of a satellite program, planning and scheduling are prime areas for consideration. In particular, scheduling satellite activities is repetitive, time-consuming, and nontrivial. Automating these tasks can reduce operator staffing requirements and increase the utility of the satellite. Additionally, since the main cost of an automated scheduler is its development, being able to use the scheduler for different satellite programs would lead to great cost savings. Since there is such variety in satellite programs, no one scheduler can realistically be used to schedule them all. Automated schedulers can, however, be developed for "classes" of satellites that …

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The Design Of A Highly Configurable, Reusable Operating System For Testbed Satellites, Rajesh Batra Sep 1997

The Design Of A Highly Configurable, Reusable Operating System For Testbed Satellites, Rajesh Batra

Small Satellite Conference

Quick testbed satellites, typically inexpensive, built in quantity, and designed to run customer specified experiments offer researchers the opportunity to test, in a relatively inexpensive manner, experiments in space. Likewise, quick testbed satellites offer companies the ability to prototype new products in a relatively short design cycle. The design of an operating system (OIS) for a quick testbed satellite is different from ordinary operating systems found on today's satellites. In the case of a typical satellite, the mission is specific and therefore the software on board is designed with that mission in mind. For a testbed, the satellite bus has …

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Big Science On A Small Budget: A University Sounding Rocket, Ellen Riddle, Jennifer Owens Sep 1997

Big Science On A Small Budget: A University Sounding Rocket, Ellen Riddle, Jennifer Owens

Small Satellite Conference

The High-altitude Ozone Measuring and Educational Rocket (HOMER), a pilot for the NASA Student Launch Program, was a suborbital rocket investigation conducted by the Colorado Space Grant Consortium (CSGC). The HOMER mission provided: a unique educational opportunity for hands-on involvement by students in colleges and universities throughout Colorado; measurements of ozone and atmospheric constituents which affect ozone in the Earth's atmosphere; a demonstration of advanced and low-cost technologies that enable these measurements; and an intercomparison of measurement techniques. HOMER was launched from Wallops Flight Facility in Wallops Island, Virginia on August 12, 1996. HOMER is a follow-on payload to two …

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Falcon Gold - Orbit Determination Above The Gps Constellation, Johnston Coil Sep 1997

Falcon Gold - Orbit Determination Above The Gps Constellation, Johnston Coil

Small Satellite Conference

Students at the University of Colorado at Colorado Springs (UCCS) and the United States Air Force Academy (USAFA) are designing, building, and testing a spacecraft scheduled to fly on a Lockheed Martin Atlas/Centaur in October 1997. The mission objective is to characterize the Global Positioning System (GPS) signal for use in orbit determination above the GPS constellation. Falcon Gold will remain on the spent Centaur in a Geosynchronous Transfer Orbit (GTO) relaying GPS signal measurements for approximately two weeks until the on-board batteries expire. These measurements will characterize the signal to noise ratio and may yield an orbit solution during …

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Seastar™ (Orbview-2) Flight Operations And Data Delivery, Patricia Leygraaf Sep 1997

Seastar™ (Orbview-2) Flight Operations And Data Delivery, Patricia Leygraaf

Small Satellite Conference

SeaStar is the result of a ground-breaking arrangement between Orbital Sciences Corporation and NASA, in which the U.S. Government is procuring space-based environmental remote sensing data for research purposes from a commercial operator. The SeaStar system incorporates the Sea-viewing Wide Field-of-view Sensor (SeaWiFS), a visible to near-infrared, multi-spectral scanning radiometer developed by the Hughes Santa Barbara Research Center (SBRC). The ocean color data provided by this mission supports more efficient and profitable environmental monitoring and marine industries. The data purchase arrangement with NASA results in a unique mission operations scenario. Orbital is responsible for conducting full mission operations and maintaining …

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Alexis, The Little Satellite That Could - 4 Years Later, Diane Roussel-Dupre, Jeff Bloch, Cindy Little, Robert Dingler, Bryan Dunne, Sandra Fletcher, Meg Kennison, Keri Ramsey, Rebecca King, James Theiler, John Sutton, James Wren Sep 1997

Alexis, The Little Satellite That Could - 4 Years Later, Diane Roussel-Dupre, Jeff Bloch, Cindy Little, Robert Dingler, Bryan Dunne, Sandra Fletcher, Meg Kennison, Keri Ramsey, Rebecca King, James Theiler, John Sutton, James Wren

Small Satellite Conference

The 113-kg Array of Low Energy X-ray Imaging Sensors (ALEXIS) satellite was launched from the fourth flight of Pegasus on 25 April, 1993 into a 750 x 850 km, 70 degree inclination orbit. Due to damage sustained at the time of launch, ground controllers did not make contact with the satellite until late June of 1993. By late July, full satellite operations had been restored through the implementation of new procedures for attitude control. Science operations with the two onboard experiments began at that time. Now 4 years later ALEXIS is still collecting more than 100 MB of mission data …

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Intelligent Systems Applied To The Aerospace Industry, Charisse Sary, Roger Werking Sep 1997

Intelligent Systems Applied To The Aerospace Industry, Charisse Sary, Roger Werking

Small Satellite Conference

For years, the aerospace industry has relied on people and their knowledge to make critical decisions. This method of decision-making has become very expensive and unreliable, particularly when used to monitor increasingly complex systems. Intelligent systems and tools are now available that can be used to reduce costs and improve operations. Much work has been done in the area of intelligent systems to support aerospace-related activities. Computer Sciences Corporation (CSC) has conducted studies and developed prototypes using three forms of intelligent systems: case-based reasoning, rule-based reasoning, and model-based reasoning. This paper will present an overview of these technologies and related …

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Spacecraft Energy Storage Systems, Wilf Robinson, James Hanks, Len Spina, Doug Havenhill, Gary Gisler, Steve Ginter, Sharon Brault Sep 1997

Spacecraft Energy Storage Systems, Wilf Robinson, James Hanks, Len Spina, Doug Havenhill, Gary Gisler, Steve Ginter, Sharon Brault

Small Satellite Conference

Flywheel Energy Storage Systems represent an exciting alternative to traditional battery storage systems used to power satellites during periods of eclipse. The increasing demand for reliable communication and data access is driving explosive growth in the number of satellite systems being developed as well as their performance requirements. Power on orbit is the key to this performance, and batteries are becoming increasingly unattractive as an energy storage media. Flywheel systems offer very attractive characteristics for both energy storage in terms of energy density and the number of charge/discharge cycles, together with the important side benefit of spacecraft attitude control.

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A Fault Tolerant Integrated Electronics Module For Small Satellites, M.E. Fraeman Sep 1997

A Fault Tolerant Integrated Electronics Module For Small Satellites, M.E. Fraeman

Small Satellite Conference

The Johns Hopkins University Applied Physics Laboratory (JHU/APL) Space Department has developed the JHU/APL Integrated Electronics Module (APL IEM) architecture for future satellites to minimize development costs while maximizing mission flexibility. The architecture supports both low earth orbit and deep space missions. Redundant and single string configurations are possible. Core spacecraft functions including communications, guidance, navigation, attitude, power control, health and safety, command, and data handling are implemented in the APL IEM. Extensive use is made of industry standards. Adhering to these standards at subsystem boundaries allows us to incrementally improve these designs without impacting the remainder of the system. …

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Development Of Flexible Thin-Film Photovoltaic Arrays For Nanosat Applications, Darby Cooper, Howard Shanks, Robert Weber Sep 1997

Development Of Flexible Thin-Film Photovoltaic Arrays For Nanosat Applications, Darby Cooper, Howard Shanks, Robert Weber

Small Satellite Conference

Space Industries has supported on-going internal development of a ''Nanosat'' spacecraft for a variety of missions. An essential part of any small spacecraft effort is an efficient power system. Amorphous thin-film silicon photovoltaic provide a mass efficiency greater than other photovoltaic systems. In cooperation with the Microelectronics Research Center at Iowa State University, Space Industries has undertaken a development effort to assess the potential of utilizing amorphous thinfilm silicon photovoltaics on small spacecraft. An overview of the development of a prototype unit will be presented along with results from ground testing. Projections for utilization of this technology in a flight …

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Colloidal Silver Not Approved For Treating Animals, Clell Bagley Aug 1997

Colloidal Silver Not Approved For Treating Animals, Clell Bagley

All Current Publications

FDA has received reports that products containing colloidal silver are being promoted for use in the treatment of mastitis and other serious disease conditions of dairy cattle, as well as for various conditions of companion animals. For example, FDA’s Center for Veterinary Medicine has received reports from the Agency's regional milk specialists and State inspectors that colloidal silver products have been found on some dairy farms.

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Draft Environmental Impact Statement, Wasatch Front Regional Council Jul 1997

Draft Environmental Impact Statement, Wasatch Front Regional Council

Elusive Documents

Based upon coordination with public and government agencies, combined with evaluation of technical considerations, Wasatch Front Regional Council has identified a light rail transit (LRT system as the preferred alternative to serve the University-Downtown-Airport Transportation Corridor of Salt Lake City, Utah. The 10.9 mile East-West Corridor will be constructed from the University of Utah Health Sciences Center, through the Central Business District (CBD) to Salt Lake City International Airport. It will interface with the existing north-south LRT line at 400 South and Main Street, and at South Temple and 400 West. The East-West LRT project will fulfill the following objectives: …

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Draft Environmental Impact Statement: Appendices, Wasatch Front Regional Council Jul 1997

Draft Environmental Impact Statement: Appendices, Wasatch Front Regional Council

Elusive Documents

No abstract provided.

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Publishing Books, Everette E. Dennis, Ted Pease, Craig Lamay Jul 1997

Publishing Books, Everette E. Dennis, Ted Pease, Craig Lamay

Journalism and Communication Faculty Publications

WISE COMMENTATORS have long evaluated books and bookmaking. "Man builds no structure which outlives a book," wrote Eugene Fitch Ware in The Book, and Justin M'Carthy's A Ballade of Book-Making declared, "The critics challenge and defend ... of making books there is no end." Others have written loving odes to the book. Garrison Keillor, for instance: The book is a "great and ancient invention," he marveled, "slow to hatch, as durable as a turtle, light and shapely as befits a descendant of the tree .... A handsome, useful object begotten by the passion for truth ... [books] contain our common …

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Comparisons Of Rations At Weaning, Usu 1994, Clell Bagley, Norris Stenquist Jul 1997

Comparisons Of Rations At Weaning, Usu 1994, Clell Bagley, Norris Stenquist

All Current Publications

Calves in three groups were fed grass hay for 24–36 hours after weaning. For the next 2 weeks they were fed the rations below. For the final 2 weeks, all groups were fed ration number two. Read this article to see what happens next.

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Nutritional Diseases Of Sheep, Clell Bagley Jul 1997

Nutritional Diseases Of Sheep, Clell Bagley

All Current Publications

Nutritional diseases result from a deficiency, an excess or an imbalance of nutrients. They are common but usually produce only sporadic cases of illness or death loss. However, the wrong combination of events can lead to devastating losses.

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Reproductive Diseases Of Sheep, Clell Bagley Jul 1997

Reproductive Diseases Of Sheep, Clell Bagley

All Current Publications

Diseases which reduce the reproduction rate are common in Utah flocks. The major problem seen in the ewes is abortion. With rams, the major disease affecting reproduction is ram epididymitis.

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Bluetongue In Cattle, Clell Bagley Jul 1997

Bluetongue In Cattle, Clell Bagley

All Current Publications

Bluetongue (BT) is a viral disease that is spread mainly by one specific type of gnat. Other gnats and blood sucking insects may occasionally transmit BT, but they are much less important in its transfer. Cattle are the main reservoir for overwintering of the virus in temperate climates.

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Breeding Soundness Examination Of Rams, Clell Bagley Jul 1997

Breeding Soundness Examination Of Rams, Clell Bagley

All Current Publications

The objective of a breeding soundness examination (BSE) of rams is to evaluate and classify their potential breeding ability. This process should include evaluation of their physical condition as well as an evaluation of the semen itself. A BSE does not include an evaluation of sex drive or breeding behavior because there are no standardized criteria by which to judge these. Their best evaluation at present will come from observation of the rams breeding behavior after introduction into the ewe flock.

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Understanding Bull Breeding Soundness Exams, Clell Bagley, Craig Burrell Jul 1997

Understanding Bull Breeding Soundness Exams, Clell Bagley, Craig Burrell

All Current Publications

Controversy still exists about Breeding Soundness Examinations (BSE) and what they can and cannot do. At times they are not used because of a lack of understanding of their value while at other times they are used with unrealistic expectations. First, BSE is performed to identify bulls with reduced fertility not just to find those which are sterile. Very few bulls are sterile but a significant percent have reduced fertility.

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Preventing Calf Losses, Clell Bagley Jul 1997

Preventing Calf Losses, Clell Bagley

All Current Publications

Many beef producers and practicing veterinarians noted there were higher than normal calf death losses during the 1993 calving season. We were especially aware of the increased losses here in the western states, but there were also heavy losses in the midwest and east, so the problem was very widespread.

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Clinical Trials With Copper Supplementation, Clell Bagley, Norris Stenquist, Dennis Worwood Jul 1997

Clinical Trials With Copper Supplementation, Clell Bagley, Norris Stenquist, Dennis Worwood

All Current Publications

Copper deficiency has been diagnosed in beef cattle herds in many areas of the intermountain west. Copper supplements are not widely used, even though several products are available. It is difficult to correct a deficiency because too much copper can result in copper toxicity or poisoning. Toxicity is less a hazard with cattle than with sheep, but it is still a problem to guard against. Periodic monitoring of the herd’s copper status is essential for proper supplementation.

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Toxic Contaminants In Harvested Forage, Clell Bagley Jul 1997

Toxic Contaminants In Harvested Forage, Clell Bagley

All Current Publications

Harvested forages are vitally important and commonly used for beef production. But contamination can occur which results in reduced forage quality and palatability or may even result in animal illness and death. Outlined below are some of the common problems that should be considered.

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Updating Your Herd Health Plan, Clell Bagley Jul 1997

Updating Your Herd Health Plan, Clell Bagley

All Current Publications

Animal health is not sold in a bottle, syringe or sack. It comes as a result of proper management. The increased concentration and movement of cattle and demands for greater production necessitate an improved level of management to maintain cattle health.

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Mycotoxins, Clell Bagley Jul 1997

Mycotoxins, Clell Bagley

All Current Publications

Certain metabolites of some fungi (molds) are poisonous (toxic). Fungal poisons have been known for many years, but they were not considered a major factor in animal disease until fairly recently. Because the prefix myco- refers to fungi, these toxins are termed mycotoxins. Penicillin is derived from a fungus and could be termed a mycotoxin, in relation to bacteria which are sensitive to it.

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Pinkeye, Clell Bagley Jul 1997

Pinkeye, Clell Bagley

All Current Publications

Pinkeye is the common term for Infectious Bovine Keratoconjunctivitis (IBK). This terminology describes a disease condition of cattle which is infectious in nature and causes an inflammation of the transparent cornea, the sclera (“white”) of the eyeball and the conjunctiva (inside lining membrane) of the lids.

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Vaccinating To Prevent Pneumonia, Clell Bagley, Donald Snyder, Nyle Matthews Jul 1997

Vaccinating To Prevent Pneumonia, Clell Bagley, Donald Snyder, Nyle Matthews

All Current Publications

Bovine Respiratory Disease (BRD) is a major problem for cattle and it continues to cause serious economic losses. Pneumonia is its most serious form. BRD causes increased death losses, higher medication and labor costs, and lost production. It occurs most commonly within a few weeks of weaning and is especially troublesome then. BRD is more serious in calves which are shipped long distances right after weaning and is often referred to as shipping fever.

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