A Portable Realtime Shipboard Data Display System

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A Portable Real-time Shipboard Data Display System

• PI Tim Bates, PMEL Atmospheric Chemistry Group
• Developers Derek Coffman, Joe Sirott
• Presenter Don Denbo
• PMEL/NOAA

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Overview

• The development of the Real-time Shipboard Data
  Display System enables scientists to
• View data in real-time as its being collected.
• Monitor instrument performance.
• Modify sampling strategies based on collected
  data.
• Treat data from multiple sensors and
  investigators in a consistent and transparent
  way.
• View historical data.

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JavaScript Realtime Display Client
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JavaScript Realtime Display Client
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JavaScript Realtime Display Client
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JavaScript Realtime Display Client
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Shipboard Display System
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Web Browser User Interface

• Uses AJAX (Asynchronous JavaScript and XML) to
  send and receive messages
• Combination of Dynamic HTML (DHTML), Cascading
  Style Sheets (CSS), and XSLT (XML Style Sheet
  Transformations) used to create UI elements
• Results in much more responsive UI
• And back button works!

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Servlet

• Handles plotting using JFreeChart for line plots
  and (future) SGT for contour plots and maps
• Embedded hsqldb relational database store for
  XML messages containing UI state
• Netcdf/MySQL connector for data access

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Features

• Some actions are immediately handled by
  JavaScript (new plot windows, draw zoom box)
• Actions that require server response handled by
  asynchronous HTTP requests with XML to/from
  server.
• UI updated with DHTML.
• Save/Restore
• State can be saved by clicking on Save button.
• User is sent a unique URL that can be bookmarked.
• State of entire UI is restored by returning to
  the saved URL.

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Future Development

• Integrate Shipboard Data Display System with new
  modular data ingest system (currently under
  development by Derek Coffman).
• Real-time data stream management and display.
• Contour plotting using SGT.