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EGiS Web Services User's Guide

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These instructions are intended to help you get started with EGiS Web Services. In the event you experience any problems using our web site, we kindly recommend that you first contact the Network / IT department at your location, assuming you have one. As a secondary option, contact us at egis@esrange.ssc.se.

Toc

Brief description

Via the Control-panel window the user can select various instruments and display their data collection in a graph. The current instruments are:
  • Magnetometer: Measures earth magnetic field deviation in North/South, East/West and Z directions. The chart displays the three quantities as a function of time.
  • Riometer: Measures radio noise at 27 and 35 MHz. The chart displays the two quantities as a function of time.
  • Photometer: Measures photon intensity in the area Red, Green, Blue and Violet. The chart displays the four quantities as a function of time.
  • Windprobes: Measures Wind direction and speed at heights of 10,25,45,65,85 and 100 meters. The chart displays the two quantities as a function of time as well as provides statistical charts in form of a windrose and a histogram.
  • Meteorological balloon: Used for meteorological soundings. Measures a variety of physical quantities such as altitude, pressure, temperature, and ozone partial pressure. 'Equivalent potential temperature' and 'Ozone mixing ratio' are then calculated out of the measured data and the results are displayed in the chart.
  • Meteometer: Mesurments from Esrange ballonpad for wind direction and speed, temperature, dewpoint, humidity, pressure and precipitation.

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How To:

Quick look utillity.

E.G.I.S Quicklook Charts
  • Scale: Scale Y-axis to fit data within.
  • Live: Display a 3 hour graph with the x-axis end point as the most recent time sample.
  • Archive: Display a 3 hour graph with the given time stamp as the x-axis start point.

E.G.i.S full view. Only for authorized users.

Control Panel
  1. The select box lets the user choose between Magnetometer, Riometer, Photometer and Wind.
  2. Settings. Explained in section 2.
  3. a) Live, for displaying data in present time.
    b) Archive, for displaying archived data.
  4. When either 3a or 3b is selected, new arguments are displayed in this region.
  5. Submit button. Opens a new browser window with requested chart.
    Hold ctrl while clicking on the button will tell the browser to explicity open a new window. This may be used if you want to view multiple charts.
  6. Link to meteorological data view panel.
Logout, UserGuide and Quick select-links are self-explainatory.

2 Settings

When activated, a profile will be set containing properties for each chart. As first-time user, you should load defaults as a reference and then make changes. After saving, the charts will use your profile information instead of default values. If you encounter a profiler error use the remove profile link. Custom settings
  • General Chart Properties: This handles the chart itself, size and colors.
  • Data Line Specifics: Turn the visability on/off, change thickness and color of the data line.
  • About Colors: IMPORTANT! The color is definded by a 8 digit hex number. The first two indicates the level of transparency.[00]-->no transparency, [ff]--> full transparency. The following six is the [RGB]-color. Leading zeros is not needed meaning that no transparent blue color can be expressed with only two hexnumbers [ff] instead of [000000ff]. In the custom panel entries with color data has a button linked to it. The color of the button should be the RGB interpretation of the field without transparency level. To get a new color click the button and a color pick window will open.
  • Other:
    • Windometer: The Windrose need a color-array to produce the sections of the rose. It is very important that each color level is delimited by a return-stroke(new-line).The colorbutton opens the color-picker and each picked color will return at the end of the line before the END part. It is important that every speed element has a corresponding color element both ending with the word END.
    • PTU-Ozone: Eq Pot Temperature has a Zone attribute. That means that predefined zone colors will appear at each level of the PTU_array. the attribute will be:
      • [0] No Zone color activated (Default).
      • [1] Red-blue gradient.
      • [2-9] Reserved.

3b, Live --> 4

View of Semi-Live attributes
  • Graphic refresh rate: The amount of seconds between each chart update. As the data is stored every 10th second the 5s entry is merely there to limit the gap time that client and server computer might have. In practice this has no real importance because there are other bottlenecks resulting in this application lack of 'real' real-time data.
  • Time span: How many time units the chart should span. As visual interpretation of gradients are much more difficult when several data points are displayed the user can easily adjust this by narrowing the time boundary.
  • Data sampling: Every n'th nr of data points that will be read from database. Skipping data points results in smother curves to the expense of precision. Raw means every data point is read.
  • Scale factor: To zoom in and out the charts. Y-axis offsets can be done in "settings".
  • Show data gaps: The instrument might fail data point readouts. This will be marked with gaps instead of drawing a straight line from the ambient data points. This is performance consuming but provides a better interpretable graph.

3b, Archive --> 4

View of Archive attributes View of Archive attributes
  • Time start point: The predefined value was put there as an example of how to enter a time. Time is UTC. The calendar icon leads to a simple date picker function.
  • Time stop point: Choose how may hours of data from the start point that shall be displayed in the graphs. The button with the ? allows user input. The number may be in fractions and comes in the unit of hours. Writing 0.1 translates to 6 minutes.
  • Data sampling: Every n'th nr of data points that will be read from database. Skipping data points results in smother curves to the expense of precision. Raw means every data point is read.
  • Scale factor: To zoom in and out the charts. Y-axis offsets can be done in "settings".
  • Show data gaps: The instrument might fail data point readouts. This will be marked with gaps instead of drawing a straight line from the ambient data points. This is performance consuming but provides a better interpretable graph.
  • Instrument specifics: Some instrument have specific properties.
    • Magnetometer: None
    • Riometer: None
    • Photometer: None
    • Windometer: Level, 6 different heights (10,25,45,65,85,100 meters)

5 Output

Example: Magnetometer chart
Chart Example
  1. Chart Legend: Beneath the "UTC" displays the last obtained value. Used primarly in the live data.
  2. Control Panel: Link to the control panel.
  3. Print: Open the system printing utillity.
  4. Save: The data displayed in the chart can be saved as a tab-delimited file.
  5. Jump Buttons: Takes the user back and forward in time the amount of hours choosed in the time interval stop point. Jump length in hours is displayed between bracets.
  6. Info Box: To easily visualize start and stop time.

 

6 PTU-Ozone

Ptu_control
  • Live: Displays a semi-live chart from a on-going balloon flight.
  • Display flight from year: Opens up a list of flights, year-wise. To view a chart from a specific date entry click on the corresponding view-link.

 

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General browser requirements

This site has been tested using Internet Explorer 5, Netscape Navigator 7.1, Opera 7 and Mozilla Firefox 0.91. Using one of these browsers is recommended.

If needed, download the browser of your choice by clicking on one of the images below.

JavaScript must be enabled wherever applicable.

Other browsers supporting JavaScript might work, but this is not guaranteed.

Get Firefox Get Opera Get Microsoft Internet Explorer Get NetScape

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Troubleshooting

  • Opera software has a slight problem with buttons as well as with the help sections.
  • Browsers may sometimes complain about the archive DOM-objects. Reload the page.
  • Sometimes the browser conflicts with its own cached pages and egis webserver. Clear the cache if you suspect such.

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Printing the ometer graphs

Use appropriate hotkey [i.e ctrl-p] or click on the print link.

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We welcome any objective comments or suggestions for improving the EGiS website.

Send mail to egis@esrange.ssc.se with questions or comments about this web site.
Copyright 1997 Swedish Space Corporation, Esrange
Last Modified: November 23, 2005