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SAAPS, Version 1.01 |
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This applet enables the user to enter anomaly data and produce local time plots or local time histograms.
The first step is to enter anomaly data by pushing the "Edit Anomaly Data ..." button. A new dialogue window should appear into which anomaly data can be entered. The data can either by typed in directly or copy-and-pasted from some text editor. The format of the data is explained in the anomaly data dialogue help page. When data has been entered push OK.
Next the entered data fields must be identified. Push the "Identify Fields ..." button and the Identify Fields dialogue window will appear. Each field must be identified by connecting it to a type, e.g. field 1 (the first column in the user data) can represent year, field 2 month, and so on. See also the identify fields help page.
Not all fields need to be identified. For a local time histogram only the local time field is needed. If local time is not present in the user data then the time and longitude must be used. For a local time plot both time, and local time or longitude are needed.
When the "Local Time Plot" button is pushed a plot with each anomaly event as a point in a timelocal time coordinate system will be produced. Any clustering of points in the midnightmorning sector indicates surface charging events. One can also zoom in the plot to study specific events in detail.
When the "Local Time Histogram" button is pushed the distribution of anomalies over local time will be shown. The data are binned in one hour bins from LT00 to LT23. The plot shows the number of anomalies in each bin. If there is a peak in the distribution then it indicates the anomalies are due to surface charging.
Peter Wintoft |
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