Space System Software Spacecraft computer systems and their software provide unprecedented capability on orbit, but drive system cost and complexity

Optimization of Separated Spacecraft Interferometer Trajectories in the Absence of A Gravity-Well Edmund M Kong Prof david w, miller MIT Space Systems Laboratory 20th March 1998 Space Systems Laboratory Massachusetts Institute of Technology

Background OF TECHN Why is Software Engineering Hard? “Curse of flexibility \And they looked upon the software and saw that it was good. But they just had to add one other feature ... No physical constraints

Overview Spacecraft data processing requires microcomputers and interfaces that are functionally similar to desktop systems However, space systems require: - Low power, volume, and mass High reliability and fault tolerance

Satellite communications Architecture Identify Requirements Specify architectures Determine link data rates Design Size each link Document your rationale

Ground system design Col John Keesee 6/17/2004 Lesson objective The student will Be able to list the functions performed by a space systems ground support system 2. Know factors in ground station design 3. Know components of ground station

本单元4篇课文都是新闻报导。“新闻”有广义和狭义之分。广义的“新闻”包括消 息、通讯、报告文学;狭义的“新闻”指的就是消息。本单元的《人民解放军百万大军横 渡长江》、《美“挑战者”号航天飞机升空后爆炸》是消息;《谁是最可爱的人》《杂交水 稻之父一袁隆平》是通讯

by Andreas Hoffman Introduction This jumpstart shows you the basics of getting Scheme started, running simple programs, that the Scheme installed in the 16.410 computer lab is the Windows vers Ban On simple editing and debugging, and exiting out of Scheme. The jumpstart is oriented towards Windows installations, but can be adapted for Unix and other installations. Note Please note that this jumpstart will give you only the most rudimentary skills in Scheme

Elements of Algorithmic analysis · Soundness is a solution returned by the algorithm guaranteed to be Completeness is the algorithm guaranteed to find a solution when there is Time complexity how long does it take to find a solution? Space complexity how much memory does it need to perform search? Sian willams, Spring o3 Characterizing Search algorithms

Rules on NEAr and messenger A Simple Reflex System Reflex Rules NEAR CourtesyofNasa/JhuaPl.http://www.jhuapl.com Applying Rules to the NeAr Spacecraft Sample NEAR rule ymptom (Charger current>0