Representing and Analyzing Sequential Satellite Mission Design Decisions through Anisomorphic Trees and Directed Graphs

2022 ◽  
Author(s):  
Ada-Rhodes Short ◽  
Prachi Dutta ◽  
Ben Gorr ◽  
Luke Bedrosian ◽  
Daniel Selva
Keyword(s):  
Directed Graphs ◽  
Mission Design ◽  
Satellite Mission ◽  
Design Decisions

scholarly journals King-Hele orbit theory for periodic orbit and attitude variations

2020 ◽  
Vol 501 (1) ◽  
pp. 1168-1187
Author(s):  
Vishal Ray ◽  
Daniel J Scheeres
Keyword(s):  
Drag Coefficient ◽  
Dynamic Parameter ◽  
Mission Design ◽  
Fourier Series Expansion ◽  
Satellite Orbits ◽  
Physical Interaction ◽  
Satellite Mission ◽  
Simplifying Assumptions ◽  
Time Variations ◽  
Specific Factors

ABSTRACT The analytical theory of satellite orbits in an atmosphere developed by King-Hele remains widely in use for satellite mission design because of its accurate approximation to numerical integration under simplifying assumptions. Over the course of six decades, modifications to the theory have addressed many of its weaknesses. However, in all subsequent modifications of the original theory, the assumption of a constant drag-coefficient has been retained. The drag-coefficient is a dynamic parameter that governs the physical interaction between the atmosphere and the satellite and depends on ambient as well as satellite specific factors. In this work, Fourier series expansion models of the drag-coefficient are incorporated in the original King-Hele theory to capture time-variations of the drag-coefficient in averaging integrals. The modified theory is validated through simulations that demonstrate the attained improvements in approximating numerical results over the original King-Hele formulation.

Mission Design of the Dutch-Chinese FAST Micro-Satellite Mission

2009 ◽  
pp. 187-194 ◽  
Author(s):  
D. Maessen ◽  
J. Guo ◽  
E. Gill ◽  
E. Laan ◽  
S. Moon ◽  
...  
Keyword(s):  
Mission Design ◽  
Satellite Mission

scholarly journals Development of the User Requirements for the Canadian WildFireSat Satellite Mission

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5081
Author(s):  
Joshua M. Johnston ◽  
Natasha Jackson ◽  
Colin McFayden ◽  
Linh Ngo Phong ◽  
Brian Lawrence ◽  
...  
Keyword(s):  
Monitoring System ◽  
Wildland Fire ◽  
Earth Observation ◽  
Mission Design ◽  
User Requirements ◽  
User Engagement ◽  
Satellite Mission ◽  
Wildfire Management ◽  
Fire Monitoring ◽  
Space Agency

In 2019 the Canadian Space Agency initiated development of a dedicated wildfire monitoring satellite (WildFireSat) mission. The intent of this mission is to support operational wildfire management, smoke and air quality forecasting, and wildfire carbon emissions reporting. In order to deliver the mission objectives, it was necessary to identify the technical and operational challenges which have prevented broad exploitation of Earth Observation (EO) in Canadian wildfire management and to address these challenges in the mission design. In this study we emphasize the first objective by documenting the results of wildfire management end-user engagement activities which were used to identify the key Fire Management Functionalities (FMFs) required for an Earth Observation wildfire monitoring system. These FMFs are then used to define the User Requirements for the Canadian Wildland Fire Monitoring System (CWFMS) which are refined here for the WildFireSat mission. The User Requirements are divided into Observational, Measurement, and Precision requirements and form the foundation for the design of the WildFireSat mission (currently in Phase-A, summer 2020).

A User Needs Assessment for the next Mass Change Satellite Mission

2020 ◽  
Author(s):  
Margaret Srinivasan ◽  
Matthew Rodell ◽  
John Reager ◽  
Bradley Doorn ◽  
Laura Rogers
Keyword(s):  
Spatial Scales ◽  
Mass Change ◽  
Mission Design ◽  
Groundwater Depletion ◽  
User Needs ◽  
Satellite Mission ◽  
Flood Prediction ◽  
User Community ◽  
User Communities ◽  
Data Products

<p>Planning is underway for development of the next NASA Mass Change satellite mission, as identified in the National Science Foundation’s 2017-2027 Decadal Survey for Earth Science and Applications from Space  (Decadal Survey). NASA has identified a Mass Change Designated Observable (MCDO) Study Team to evaluate satellite mission architectures that could optimally support a range of science and applications needs of user communities (both research and operational) of future mass change missions (i.e., successors to the GRACE and GRACE Follow On missions). The primary science objective of the MCDO, as identified in the Decadal Survey, is the continued measurement of changes in the Earth’s dynamic gravity field over time. The Decadal Survey also emphasizes applications of the mission data products as a major focus, in addition to science outcomes. </p><p>Operational use and societal benefit derived from the GRACE and GRACE FO data and information products demonstrate the value of these missions. Applications include drought monitoring, quantification of groundwater depletion, flood prediction, and thermal expansion of the ocean, which contributes to sea level rise, to name a few. In order to effectively identify the observational product requirements of future gravity mission applications data users and to develop actionable objectives for mission design, a Mass Change Mission Applications survey was developed. Information on user needs, current uses, and capabilities derived from the survey have provided insights as to desired or required spatial scales, data latency, data formats, and technical capabilities of the users, as well as how to prioritize tradeoffs. The survey focused on evaluating the needs of a broad range of existing and potential user communities in order to incorporate these needs into mission design and architecture studies that are underway.</p><p>The survey comprises general questions about requirements for a given application, and data use and demographic information to help characterize aspects of the user community. Analyses of the survey results are now being used to inform potential mission architecture designs, evaluate tradeoffs, and ensure that the data products are optimized for a broad user community.</p>

A Distributed Scene Simulation System for Earth Observation Satellite Mission Design and Analysis

2013 ◽  
Vol 444-445 ◽  
pp. 1810-1814
Author(s):  
Sheng Gang Liu ◽  
Shao Kai Wang ◽  
Chao Han
Keyword(s):  
Simulation System ◽  
Model Management ◽  
Mission Design ◽  
Satellite Mission ◽  
Scene Simulation ◽  
The Earth ◽  
Requirements Determination ◽  
Orbit Analysis ◽  
Remote Sensing Techniques ◽  
And Performance

The primary mission objective is gathering information of the Earth by on-board instruments using remote-sensing techniques, and sending the useful information back to the ground. Its mission design and analysis involves identification of critical requirements, determination of mission orbit, analysis of relationship between satellite, the Earth and the Sun. This paper proposed a new scene simulation system based on distributed architecture, which consisted of mission design subsystem, numerical simulation subsystem, scenario display subsystem and model management subsystem. The system can show the updated mission status and performance rapidly and efficiently after user modified the initial mission parameters. Practice has proven that it can help users to make a decision and judgment for the mission design, and improve their work efficiency.

Computers before silicon: design decisions on Edsac

IEE Review ◽  
1990 ◽  
Vol 36 (11) ◽  
pp. 429 ◽  
Author(s):  
Maurice V. Wilkes
Keyword(s):  
Design Decisions

Will Love Tear Us Apart: Adapting the Lyrical to the Ludic

CounterText ◽  
2016 ◽  
Vol 2 (2) ◽  
pp. 217-235
Author(s):  
Gordon Calleja
Keyword(s):  
Design Process ◽  
Game Design ◽  
Digital Games ◽  
Design Decisions ◽  
The Core ◽  
Lyrical Poetry ◽  
Insight Into ◽  
Made In

This paper gives an insight into the design process of a game adaptation of Joy Division's Love Will Tear Us Apart (1980). It outlines the challenges faced in attempting to reconcile the diverging qualities of lyrical poetry and digital games. In so doing, the paper examines the design decisions made in every segment of the game with a particular focus on the tension between the core concerns of the lyrical work being adapted and established tenets of game design.

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