Builds on PHA as a foundation (expands PHA) Considers system as a whole and identifies how system operation nterfaces and interactions between subsystems interface and interactions between system and operators component failures and normal (correct) behavior
People, not things, are the cause of accidents environment Removing any of dominoes will break sequence but said third was easiest to remove Focus on single causes Chain-of-Events Models Explain accidents in terms of multiple events, sequenced
To create effective parts/whole or process graphics 1. Show the reader what s/he needs to see. Choose appropriate type of graphic For example, what is the difference between a photo and a drawing?
Audience analysis elements Know four key facts about readers and listeners. Consider the level of technical expertise of your audience. Understand why they are reading. then... plan communication strategy and information organization
Primary research programs Geophysical research GPS analysis packages GAMIT (GPS at MIT): Uses double differences GYPSY: Jet Propulsion Laboratory (JPL) processing packages: Uses one-way observables and explicitly estimates clocks Bernese: Developed at Astronomical Institute
Propagation Basics: - Signal, tagged with time from satellite clock, transmitted. - About66msec(20,000km) later the signal arrives at GPS receiver. Satellite has moved about 66 m during the time it takes signal to propagate to receiver
Estimation · Summary Examine correlations -Process noise · White noise · Random walk First-order Gauss Markov Processes Kalman filters Estimation in which the parameters to be estimated are changing with time
Examined methods for measuring distances Examined GPS codes that allow a type of distance measurement and phase to be measured Examine how the range measurements are defined Use of carrier phase measurements Examine rinEx format and look at some \raw data
