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Graphing a 24 hour history of WSPR pings
from the WSPRnet database. This example is of the 630m band for a 24
hour period on the 22 August 2017.
Open WSPRnet web
page: http://wsprnet.org/drupal/
and click Database
upper right of the WSPRnet screen.
The database will
appear then click link Link to old
database interface
The old database
will appear then then populate the Database Query fields and click
Update
Open Microsoft
Excel, click the DATA tab,
then double click From Web above.
The
address will automatically populate the Address with the WSPRnet
query URL as above or copy or paste the URL if not.
Click
Import
Note: At this point
by clicking 'Options / Save Query the entire import process can be saved as
a *.igy
file and the Query can
simply be run again.
Click OK
The Text is now
imported into Microsoft Excel however may require some tiding up.
Create four
additional column as indicated B.
Click the DATA tab, then
Click on the A column and
then click the Text to Columns
tab.
In the Text to
Column Wizard Click Fixed width
radio button as above.
Create a break line
as above and click Finish.
The WSPR data
fields should now be displayed in Microsoft Excel as above with the
date and time in separate columns.
Graphing; with the
mouse select column B (UTC Time) then while pressing the Ctrl
key select column E (Signal to Noise Ratio or SNR) as
above.
Or instead of
selecting whole column select with the mouse only the data fields of
interest by the same technique.
Click the INSERT
tab in the upper left of the Microsoft Excel screen and then select
the Scatter Chart as above.
Displayed is a chart showing in the
vertical column the SNR and in the horizontal row, the UTC time. The
time column needs to be cleaned up to look more meaningful. Double
click the horizontal time row and a box marked AXIS
OPTIONS TEXT OPTIONS will appear as below.
Change the Maximum to 1.0 and the
Units / Major to 0.0833333 as above.
The result is a
chart showing 24 hours of UTC time in the horizontal and the SNR
(Signal to Noise Ration) in the vertical column for station traffic
as recorded by VK6YSF for 22 August 2017.
Note
the drop in SNR from approximately 13:30UCT, that is VK4YB reducing
his transmission power from 5.0W (+37dBm) to 0.5W (+27dBm)
References
For
more information on import web data to Microsoft Excel. See:
https://support.office.com/en-us/article/Get-external-data-from-a-Web-page-708f2249-9569-4ff9-a8a4-7ee5f1b1cfba
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