Digital Commons Network^™

A Note About Market Lamb Docking, Usu Extension

All Current Publications

Tail removal or docking of lambs by the commercial sheep industry is a standard management practice. When properly docked, the tail or dock will be long enough that when lifting the tail to defecate, the caudal folds on the under side of the tail are raised.

Insights, Fall, 1999, Utah State University

Discovery Magazine

Bi-annual alumni newsletter for the College of Science of Utah State University in Logan.

Environmental Assessment, Decision Record, And Finding Of No Significant Impact For The Ixc Communications, Inc.'S Proposed Fiber Optic Telecommunications System, Denver, Colorado, To Salt Lake City, Utah, U.S. Department Of The Interior, Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

IXC proposes to install and operate a telecommunications system from Denver, Colorado, to Salt Lake City, Utah, to provide service to these and other western cities. The approximately 611-mile long cable would cross 116 miles of federal land administered by the BLM (all within Wyoming), 1 mile of National Forest lands administered by the Forest Service (all within Utah), and 494 miles of state, county, municipal, and private lands. Three 1.9-inch and three 2.4-inch high-density polyethylene conduits would be installed simultaneously and a fiber optic cable would be installed in one conduit; the other conduits would be used for future …

1991-1992 & 1996 Utah Usage Of Ems Services By Children: Year Iii Research Report, Intermountain Injury Control Research Center, U.S. Department Of Commerce

All U.S. Government Documents (Utah Regional Depository)

This study examined how Utah children used emergency medical services (EMS) and related hospital care in 1991-1992. The EMS and hospital records were linked using special software (probabilistic linkage) . The principal findings of the study concerned the care of young children less than 5 years of age. They received fewer procedures prior to being transported to a hospital and required more time at the scene for assessment. Some interventions such as splinting of fractured arms prior to transport to a hospital were related to reduced hospital charges. Ambulance and hospital charges for children were estimated to by $35,000,000 not …

Mormon Domestic Life In The 1870s: Pandemonium Or Arcadia?, Utah State University Press

Arrington Annual Lecture

No abstract provided.

Marginalia No. 7, Merrill-Cazier Library

Marginalia

Issue Number 7: the proverb issue Autumn 1999

A MESSAGE FROM DEAN WHITE - new Dean of Libraries introduces herself.

“BIG THINGS COME IN SMALL PACKAGES”-Randy Williams on Proverbs, Power and Books.

INSTRUCTION: ‘IT TAKES SHARP WITS…’-Listing of Reference Librarians & Library instruction services

MERRILL LIBRARY RENOVATIONS-A brief discussion of recent changes in the Merrill Library

THE ART OF LARRY ELSNER-Art curator Rose Milovich on the upcoming exhibit and silent auction fund-raiser

USU LIBRARIES EXHIBITION SCHEDULE, 1999-Upcoming exhibits in the Library Gallery

THE STANFORD O. CAZIER SCITECH LIBRARY-Director Max Peterson reports

UTAH ACADEMIC LIBRARY CONSORTIUM- Assoc. Director, Robert Murdoch describes …

Utah Science Vol. 59 No. 4, Fall 1999

Utah Science

2 UTAH AG GETTING A TASTE FOR ONIONS

8 FEEDING THE OVERFED NO WAY TO PROSPERITY

11 A NEW RIPPLE IN THE AMBER WAVES

18 HOUSING THE NEW CENTURY

23 AT HOME ON THE RANCHETTE

26 WHAT'S BEEN DONE FOR YOU LATELY

Abortion In Cattle, Clell Bagley

All Current Publications

Abortion is the premature expulsion of the fetus from the dam and usually occurs because the fetus has died in-utero. If death occurs at 1-2 months of gestation, it is usually termed “early embryonic death.”

Behavioral Checklist Forms, Unknown Unknown

All Current Publications

No abstract provided.

Salt Lake City, Utah Profile Of Drug Indicators, Office Of National Drug Control Policy, Drug Policy Information Clearinghouse

All U.S. Government Documents (Utah Regional Depository)

The following profile contains information on demographics, political figures, funding, programs, crime, drug use, drug trafficking, and enforcement statistics.

A Consolidated Acs Flight Software Development Approach For The Earth Observing-1 Spacecraft , Kathie Blackman, Jeff D'Agostino

Small Satellite Conference

The Earth Observing 1 (EO-l) mission is part of NASA's New Millennium Program (NMP). The EO-l Attitude Control System (ACS) flight software was based on the Tropical Rainfall Measuring Mission (TRMM) flight software, both of which were developed by the Hammers Company, Inc. Lessons learned during TRMM ACS software development led to a consolidated software development approach for the EO-l ACS. The approach started with a standalone system that incorporated the ''first-cut'' flight software into the spacecraft simulation, allowing closed loop simulations to run on a desktop computer. Consequently, more algorithm and coding errors were detected earlier in the development …

Progress Toward Hydrogen Peroxide Micropropulsion, John Whitehead, Michael Dittman, Arno Ledebuhr

Small Satellite Conference

A new self-pressurizing propulsion system has liquid thrusters and gas jet attitude control without heavy gas storage vessels. A pump boosts the pressure of a small fraction of the hydrogen peroxide, so that reacted propellant can controllably pressurize its own source tank. The warm decomposition gas also powers the pump and is supplied to the attitude control jets. The system has been incorporated into a prototype microsatellite for terrestrial maneuvering tests. Additional progress includes preliminary testing of a bipropellant thruster, and storage of unstabilized hydrogen peroxide in small sealed tanks.

Gyrowheel™ - An Innovative New Actuator/Sensor For 3-Axis Spacecraft Attitude Control , George Tyc, William Whitehead, Satya Pradhan, Douglas Staley, Cameron Ower, Jeff Cain, Michael Wiktowy

Small Satellite Conference

The Bristol Gyro Wheel is an innovative attitude control system device that provides both an angular momentum bias and control torques about three axes while at the same time measuring the spacecraft angular rates about two axes. The principles of operation of this device are explained and the flight model design is described that is targeted at small satellite applications which is currently under development. A fully functional prototype of the GyroWheel has been developed that has demonstrated the actuator and rate sensing capabilities and some of the test results are given. One of the key advantages of the Gyro …

Space Testing Of The Advanced Instrument Controller, Todd Goforth, Scott Cannon, James Lyke

Small Satellite Conference

An extremely compact, low-power instrument controller and data processor system has been developed for space-based applications. Known as the Advanced Instrument Controller (AIC), this hybrid device contains both digital and analog components in a package less than 5 grams in weight and 2 x 3 em in size. Based on the Intel 8031151 microprocessor and implementing a superset of the 8051 instruction set, the AIC supports l28k of SRAM, 128k of EEPROM, four 8-bit parallel ports, six serial communications ports, 32 analog l2-bit AID channels, and eight D/A channels. Rugged (30k g) with a wide operating temperature range (-120 to …

Index: A Piggy-Back Satellite For Advanced Technology Demonstration, T. Mizuno, H. Saito, Y. Masumoto, T. Oshima, M. Hashimoto, A. Choki, A. Miura, H. Ogawa, S. Tachikawa, K. Tanaka, Y. Kuroda, I. Nakatani

Small Satellite Conference

This paper describes outline of the piggy-back satellite "INDEX" for demonstration of advanced satellite technologies as well as for a small scale science mission. INDEX satellite will be launched in 2002 by Japanese H2-A. The satellite is mainly controlled by the high-speed, fault-tolerant on-board RIes processor (three-voting system of SH-3). The attitude control is a compact system of three-axis stabilization. Although the size of INDEX is small (50Kg class), several newly-developed technologies are applied to the satellite system, including silicon-on-insulator devices, variable emittance radiator, solar-concentrated paddles, lithium-ion battery, and GPS receiver with all-sky antenna-coverage. These technology developments will be applied …

The Florida Space Institute's Photon Satellite Bus, Derek Shannon, Chrishma Singh-Derewa, Sanjay Jayaram

Small Satellite Conference

Photon is a small satellite for researching atmospheric effects on Earth-to-space laser propagation and the mitigation of those effects. Florida Space Institute engineers and scientists are designing the science mission and payload, while FSI students are responsible for the satellite bus. An agreement with NASA for a free launch aboard the Space Shuttle's Hitchhiker Ejection System has led to a unique, bottomup design approach. Science goals and stringent safety requirements have created interesting challenges for the structure, thermal, attitude control, and power subsystems. This paper emphasizes these challenges in presenting the design of the Photon satellite bus.

Pre-Flight Characteristics Of The U.S. Air Force Academy's Falconsat-1, Raja Chari

Small Satellite Conference

FalconSat-l is the first of a series of small satellites being designed, built, and operated by cadets at the U.S. Air Force Academy. FalconSat-1 's primary mission is to carry the Charging Hazard and Wake Studies-Long Duration (CHAWS-LD) space physics experiment. This mission is accomplished by cadets from various academic departments working with faculty mentors and experts from industry and other universities. The culmination of this work will come on 15 Sep 99, when FalconSat-1 is lifted into a nearly sun-synchronous orbit atop the Air Force's new Minotaur launch vehicle. This paper summarizes the design of each major subsystem. The …

Image, The First Of The New Midex Missions, W. C. Gibson, J. L. Burch, J. R. Scherrer, M. B. Tapley, F. A. Volpe, W. D. Davis

Small Satellite Conference

The Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) mission will be the first of the new Mediumclass Explorer (MIDEX) missions to fly. Led by Southwest Research Institute with oversight from the Explorers Project Office at NASA GSFC, IMAGE is the first satellite mission dedicated to imaging the Earth's magnetosphere. IMAGE will utilize a combination of ultraviolet and neutral atom imaging instruments plus an RF sounder to map and image the temporal and spatial features of the magnetosphere. The eight science sensors are mounted to a single deckplate. The deckplate is enveloped in an eight-sided spacecraft bus, 225 cm across the flats, …

Novel Missions For Next Generation Microsatellites: The Results Of A Joint Afrl/Jpl Study, Ruth Moser, David Collins, Alok Das, Robert Ferber, George Jaivin, Richard Madison, Joseph Smith, Michael Stallard

Small Satellite Conference

The development of technologies for miniature, low-mass, high density components and of systems that efficiently utilize these teclmologies has enabled a path to the next generation of highly capable microsatellites in the range of 10 - 100-kg. The characteristics and capabilities of this emerging class of satellites are briefly described. These satellites have the potential for revolutionizing space missions owing to their small size, low cost, significant capability, and good return on investment. This paper documents conceptual microsatellite mission scenarios examined in a collaborative effort between the Air Force Research Laboratory (AFRL) and the Jet Propulsion Laboratory of the California …

Emerald: An Experimental Mission In Robust Distributed Space Systems , Christopher Kitts, Freddy Pranajaya, Julie Townsend, Robert Twiggs

Small Satellite Conference

Distributed space systems are often cited as a means of enabling vast performance increases ranging from enhanced mission capabilities to radical reductions in operations cost. To explore this concept, Stanford University and Santa Clara University have initiated development of a simple, low cost, two-satellite mission known as Emerald. The Emerald mission has several on-orbit goals. First, it will verify an array of component-level technologies necessary for enabling highly capable and robust distributed space systems. Second, it will combine these technologies to experiment with simple closed loop relative positioning, distributed control, and autonomous operation. Third, it will validate the distributed space …

Discrete Event Command And Control For Formation Flying Of Distributed Small Spacecraft Systems , P. A. Stadter

Small Satellite Conference

A distributed, multi-vehicle concept for future space missions has been conceived as a solution to the problem of advancing space-based operations within budgetary constraints. Broadly named formation flying, this approach to designing distributed systems across multiple, spatially disbursed platforms is enabled by collectively coordinating a fleet of autonomous spacecraft to function as a unified system. Formation flying offers potential advantages of improved robustness, capability, and cost relative to complicated, single platform systems by using multiple, often small, spacecraft to perform complex multi-sensor tasks. A necessary element in the realization of formation flying systems is the development of methods and technologies …

Proba: Esa's Autonomy And Technology Demonstration Mission, Frederic Teston, Richard Creasey, J. Bermyn, D. Bemaerts, K. Mellab

Small Satellite Conference

Proba is an ESA mlSSlOn conceived for the purpose of demonstrating the opportunities and benefits of on-board autonomy. To this end, it offers a flight opportunity centered around the validation of the associated technological capabilities. The Proba spacecraft is equipped with a selected set of technologies providing advanced on-board functions for performing a number of mission operations functions with minimum ground involvement. The autonomy is exercised in realistic scenarios through the accommodation of four payload instruments.

Ace - A Canadian Small Science Satellite Mission, Harold Dahl, Wally Eliuk, Glen Rumbold, Randolph Shelly

Small Satellite Conference

The Canadian Space Agency (CSA) has initiated the Small Science Satellite (SCISAT) Program as a part of their ongoing space science program. The Atmospheric Chemistry Experiment (ACE) Mission from the University of Waterloo has been selected as the first SCISAT Mission, and will be launched in Q1, 2002 on board a Pegasus XL vehicle. The ACE spacecraft will be co-manifested on the Pegasus vehicle with another spacecraft which has not yet been selected. The ACE Mission will comprise instrumentation to measure atmospheric chemistry using the solar occultation method. The principal goal of the ACE Mission is to measure and to …

On-Orbit Performance Of The Orbcomm Spacecraft Constellation, Bhavesh Patel, Susanne Schroll, Andrew Lewin

Small Satellite Conference

ORBCOMM is a low cost, two-way data messaging system that uses a constellation of 36 spacecraft to provide global coverage for a wide variety of applications. Following an aggressive launch schedule, Orbital Sciences Corporation (Orbital) launched 26 spacecraft within 10 months to set up the constellation that is now providing global service to subscribers. As of August 1999, the constellation spacecraft have already accumulated over 30 spacecraft-years of on-orbit experience while demonstrating excellent in-flight performance. The ORBCOMM spacecraft design epitomizes the mass, power, and volume efficiencies of Orbital's MicroStar spacecraft platform. Unlike a single spacecraft mission, the ORBCOMM constellation provides …

Small Satellites Constellations & Network: Architectures And Technologies, G. Tarel, F. Jubineau, H. Sainct, R. Dumas, A Martinez De Aragon

Small Satellite Conference

Based on two constellation missions cases ( data collect and disaster monitoring by SAR radar ), the study derives architectural and related technologies required in the field of future commercial « small » onstellations. Global management from centralized control station is chosen here, with intermitent inter-plan visibility for 1SL, as imposed by the low altitude and moderatly populated parameters.

Three Corner Sat Constellation: C&Dh, Stereoscopic Imaging, And End-To-End Data System , Elaine Hansen, Anthony Colaprete, Dan Rodier, Brian Underhill, Assi Friedman, Joyce Wong, Helen Reed, Stephen Horan, Bobby Anderson

Small Satellite Conference

The Three Corner Sat Constellation (3~Sat) consists of three nanosatellites, which will demonstrate stereo imaging, innovative command and data handling, and formation flying with RF communications and cellular phone communications. The creation of this constellation is a joint effort between Arizona State University (ASU), the University of Colorado at Boulder (CU), and New Mexico State University (NMSU). The 3~Sat will provide accurate stereo images and range data of a variety of meteorological phenomena. With three independent nanosatellites observing a particular scene, triangulation will provide accurate range information that will be used to create three-dimensional depth maps. The cooperative communications and …

Navgold - An On-Orbit Test Bed For Experiments In Formation Flight, D. Sipple, J. Torley, F. Chavez, J. Velapoldi, D. Hanni, D. Gustavsson, B. Allard, T. De Leon, L. Morelli, J. Friend, C. Fosha, D. Schmidt

Small Satellite Conference

An initiative has been undertaken at the University of Colorado at Colorado Springs (CU-Colorado Springs) involving the design,development, launch, and operation of two nanosatellites. Objectives of the project, NavGold, include establishment of an on-orbit test bed for research, testing, and validation of critical nanosat technologies enabling formation flying and constellations. Additional educational objectives provide team members leadership opportunities in a multidisciplinary team with real hardware, budget, and scheduling challenges. Two identical nanosats will be built and flown. The spacecraft design includes a maneuvering propulsion system and three-axis active attitude determination and control. Absolute and precision relative navigation will be accomplished …

Uw Dawgstar: One Third Of Ion-F - An Element Of The Ionospheric Observation Nanosatellite Formation (Ion-F), Mark Campbell, Adam Bruckner, Ralph Ewig, Emilio Beltran, Esther Carlson, Kirsten Carpenter, Seung Chung, Benjamin Davenport, Farshad Forouhar, John Halligan, Jason Hammack, Mark Hilstad, George Hwee, Susan Kaltenbach, Gary Lai, Arti Nadkarni, Krystal Parker, Michael Peyton, Steve Pillar, William Shell, Dennis Titus, Michael Tucker, Apostolos Vlachos

Small Satellite Conference

The preliminary design for the UW Dawgstar nanosatellite is presented. The Dawgstar is a 13 kg satellite designed as a part of the University Nanosatellite Program funded by AFOSR, DARPA, AFRL, and NASA. The goal of this two-year program is to design, build, and fly nanosatellites. The mission overview is detailed, including the coupling with the University partners Utah State and Virginia Tech in the Ionospheric Observation Nanosatellite Formation (ION-F). The mission includes several formations and formation keeping experiments, and distributed ionospheric measurements. Each of the subsystems is also detailed, including the design and integration of eight miniature pulsed plasma …

University Nanosatellite Distributed Satelllite Capabilities To Support Techsat 21, Kim Luu, Maurice Martin, Mike Stallard, Howard Schlossberg, Joe Mitola, Dave Weidow, Richard Blomquist, Mark Campbell, Christopher Hall, Elaine Hansen, Stephen Horan, Chris Kitts, Frank Redd, Helen Reed, Harlan Spence, Bob Twiggs

Small Satellite Conference

A new way to perform space missions utilizes the concept of clusters of satellites that cooperate to perform the function of a larger, single satellite. Each smaller satellite communicates with the others and shares the processing, communications, and payload or mission functions. The required functionality is thus spread across the satellites in the cluster, the aggregate forming a "virtual satellite". The Air Force Research Laboratory (AFRL) initiated the TechSat 21 program to explore the basic technologies required to enable such distributed satellite systems. For this purpose, Space Based Radar (SBR) was selected as a reference mission to help identify technology …

Virginia Tech Ionospheric Scintillation Measurement Mission, Christopher Hall, Nathaniel Davis, Jaime Delaree, Wayne Scales, Warren Stutzman

Small Satellite Conference

The Virginia Tech Ionospheric Scintillation Measurement Mission (VTISMM) is a small spacecraft design, build, and fly project being funded by the Air Force Research Laboratory, the Defense Advanced Research Projects Agency, and NASA's Goddard Space Flight Center. The mission concept includes one 10 kg spacecraft that will fly in formation with two similar satellites being built by students at Utah State University and the University of Washington. The three satellites will fly in close proximity, using GPS receivers for position determination, microsensors for attitude determination, interlink communications for data transmission and relative position determination, microthrusters and differential drag for formation-keeping, …