Responsible satellite design and operational practices: A critical component of effective space environment management (SEM)

GEO satellite in orbit is greatly affected by the total radiation dose of space environment. In order to meet the requirements of satellite reliability design, radiation dose analysis is an important work in the process of satellite design. Previous radiation dose analysis is based on one-dimensional dose-depth analysis, or three-dimensional analysis, but over-simplified 3-D model may cause the analysis results deviated different from the reality. This paper presents a three-dimensional radiation dose analysis method based on the actual 3-D model of satellite. This method could analyze radiation dose with actual models, which could be automatically simplified according to needs. It could automatically extract the attribute information in the model and calculate the radiation dose value in each subspace

Download Full-text

Space environment effects and satellite design

Journal of Atmospheric and Solar-Terrestrial Physics ◽

10.1016/s1364-6826(02)00122-0 ◽

2002 ◽

Vol 64 (16) ◽

pp. 1723-1733 ◽

Cited By ~ 46

Author(s):

Robin Gubby ◽

John Evans

Keyword(s):

Space Environment ◽

Satellite Design ◽

Environment Effects

Download Full-text

Space environment management: Framing the objective and setting priorities for controlling orbital debris risk

Journal of Space Safety Engineering ◽

10.1016/j.jsse.2020.11.002 ◽

2020 ◽

Author(s):

T. Maclay ◽

D. McKnight

Keyword(s):

Orbital Debris ◽

Space Environment ◽

Environment Management

Download Full-text

Quantitative surface damage studies by H.R.E.M.

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010015513x ◽

1989 ◽

Vol 47 ◽

pp. 632-633

Author(s):

S. R. Singh ◽

H. J. Fan ◽

L. D. Marks

Keyword(s):

Solar Wind ◽

Quantitative Analysis ◽

Surface Science ◽

Surface Damage ◽

Space Environment ◽

Oxygen Desorption ◽

The Past ◽

Diffusion Controlled ◽

Original Observation ◽

Substantial Interest

Since the original observation that the surfaces of materials undergo radiation damage in the electron microscope similar to that observed by more conventional surface science techniques there has been substantial interest in understanding these phenomena in more detail; for a review see. For instance, surface damage in a microscope mimics damage in the space environment due to the solar wind and electron beam lithographic operations.However, purely qualitative experiments that have been done in the past are inadequate. In addition, many experiments performed in conventional microscopes may be inaccurate. What is needed is careful quantitative analysis including comparisons of the behavior in UHV versus that in a conventional microscope. In this paper we will present results of quantitative analysis which clearly demonstrate that the phenomena of importance are diffusion controlled; more detailed presentations of the data have been published elsewhere.As an illustration of the results, Figure 1 shows a plot of the shrinkage of a single, roughly spherical particle of WO3 versus time (dose) driven by oxygen desorption from the surface.

Download Full-text

The Unique Contribution of Positive Orientation to Optimal Functioning

European Psychologist ◽

10.1027/1016-9040/a000070 ◽

2012 ◽

Vol 17 (1) ◽

pp. 44-54 ◽

Cited By ~ 46

Author(s):

Guido Alessandri ◽

Gian Vittorio Caprara ◽

John Tisak

Keyword(s):

Psychological Functioning ◽

Well Being ◽

Unique Contribution ◽

Critical Component ◽

Positive Orientation ◽

Cross Sectional ◽

Common Mode ◽

Optimal Functioning

Literature documents that the judgments people hold about themselves, their life, and their future are important ingredients of their psychological functioning and well-being, and are commonly related to each other. In this paper, results from a large cross-sectional sample (N = 1,331, 48% males) are presented attesting to the hypothesis that evaluations about oneself, one’s life, and one’s future rest on a common mode of viewing experiences named “Positive Orientation.” These results corroborate the utility of the new construct as a critical component of individuals’ well functioning.

Download Full-text

Conscious and Unconscious Reward Cues Can Affect a Critical Component of Executive Control

Experimental Psychology (formerly Zeitschrift für Experimentelle Psychologie) ◽

10.1027/1618-3169/a000104 ◽

2011 ◽

Vol 58 (5) ◽

pp. 370-375 ◽

Cited By ~ 23

Author(s):

Rémi L. Capa ◽

Gaëlle M. Bustin ◽

Axel Cleeremans ◽

Michel Hansenne

Keyword(s):

Correct Response ◽

Executive Control ◽

Critical Component ◽

Arithmetic Operations ◽

Component Process

The present study investigates whether updating an important function of executive control can be driven by unconscious reward cues. Participants had to memorize several numbers and update those numbers independently according to a sequence of arithmetic operations. At the beginning of each trial, a reward (1 euro or 5 cents) was presented, either subliminally or supraliminally. Participants could earn the reward if they found the correct response on the updating task. Results showed better performance when a high (conscious or unconscious) reward was at stake compared to a low reward. This suggests that subliminal information can influence a component process of executive control traditionally thought to require consciousness.

Download Full-text