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20030025749 NASA Goddard Space Flight Center, Greenbelt, MD, USA
Models Required to Mitigate Impacts of Space Weather on Space Systems
Barth, Janet L.; [2003]; 16 pp.; In English; NATO Advanced Research Workshop on Effects of Space Weather on Tech.
Infrastructure; Original contains black and white illustrations; No Copyright; Avail: CASI; A03, Hardcopy
This viewgraph presentation attempts to develop a model of factors which need to be considered in the design and
construction of spacecraft to lessen the effects of space weather on these vehicles. Topics considered include: space
environments and effects, radiation environments and effects, space weather drivers, space weather models, climate models,
solar proton activity and mission design for the GOES mission. The authors conclude that space environment models need to
address issues from mission planning through operations and a program to develop and validate authoritative space
environment models for application to spacecraft design does not exist at this time.
Author
Aerospace Environments; Aerospace Systems; Spacecraft Design; Space Weather; Atmospheric Models; Environment Models;
Radiation Effects; Fatigue (Materials)
20030025765 NASA Goddard Space Flight Center, Greenbelt, MD, USA
Radiation Requirements and Requirements Flowdown: Single Event Effects (SEEs) and Requirements
LaBel, Kenneth A.; [2002]; 53 pp.; In English; Hardened Electronics and Radiation Technology Short Course, 12 Mar. 2003;
Original contains black and white illustrations; No Copyright; Avail: CASI; A04, Hardcopy
This short course session provides: (1) an overview of the single particle-induced hazard for space system as they apply
in the natural space environment. This shall focus on the implementation of a single event effect hardness assurance (SEEHA)
program for systems including system engineering approach and mitigation of effects. (2) The final portion of this session shell
provide relevant real-life examples of in-flight performance of systems.
Author
Hazards; Single Event Upsets; Particles
20030025775 NASA Goddard Space Flight Center, Greenbelt, MD, USA
Controlling Variable Emittance (MEMS) Coatings for Space Applications
Farrar, D.; Schneider, W.; Osiander, R.; Champion, J. L.; Darrin, A. G.; Douglas, Donya; Swanson, Ted D.; [2003]; 7 pp.; In
English; STAIF-2003, 2-5 Feb. 2003; Original contains black and white illustrations; No Copyright; Avail: CASI; A02,
Hardcopy
Small spacecraft, including micro and nanosats, as they are envisioned for future missions, will require an alternative
means to achieve thermal control due to their small power and mass budgets. One of the proposed alternatives is Variable
Emittance (Vari-E) Coatings for spacecraft radiators. Space Technology-5 (ST-5) is a technology demonstration mission
through NASA Goddard Space Flight Center (GSFC) that will utilize Vari-E Coatings. This mission involves a constellation
of three (3) satellites in a highly elliptical orbit with a perigee altitude of approximately 200 kilometers and an apogee of
approximately 38,000 kilometers. Such an environment will expose the spacecraft to a wide swing in the thermal and radiation
environment of the earth’s atmosphere. There are three (3) different technologies associated with this mission. The three
technologies are electrophoretic, electrochromic, and Micro ElectroMechanical Systems (MEMS). The ultimate goal is to
make use of Van-E coatings, in order to achieve various levels of thermal control. The focus of this paper is to highlight the
Vari-E Coating MEMS instrument, with an emphasis on the Electronic Control Unit responsible for operating the MEMS
device. The Test & Evaluation approach, along with the results, is specific for application on ST-5, yet the information
provides a guideline for future experiments and/or thermal applications on the exterior structure of a spacecraft.
Author
Emittance; Microelectromechanical Systems; Spacecraft Instruments; Temperature Control; Thermal Control Coatings;
Infrared Radiation
20030025777 NASA Goddard Space Flight Center, Greenbelt, MD, USA
In-Flight Observations of Long-Term Single Event Effect(SEE)Performance on Orbview-2 and Xray Timing
Explorer(XTE)Solid State Recorders (SSR)
Poivey, Christian; Barth, Janet L.; LaBel, Ken A.; Gee, George; Safren, Harvey; [2003]; 5 pp.; In English; IEEE Nuclear and
Space Radiation Effect Conference, 21-25 Jul. 2003, Monterey, CA, USA; Original contains color illustrations; Copyright;
Avail: CASI; A01, Hardcopy
This paper presents Single Event Effect (SEE) in-flight data on Solid State Recorders (SSR) that have been collected over
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