Go to the database
This service gives access to a collection of raw data files gathered from ionosondes, mostly in Europe, and has been developed as part of the UK contribution to the COST-271 action Effects of the Upper Atmosphere on Terrestrial and Earth-Space Communications. If you are new to ionospheric sounding, basic introductions to ionosonde theory and ionogram interpretation are available from the UK Ionospheric Monitoring Group web site.
The data can be queried and displayed in several ways, so that you can
To query the database you must specify the following inputs, then press the "Retrieve data" button:
If specifying a range you enter the date and time values for the start and end of the time range. The date can be reset to today, and moved back or forward by a day at a time using the appropriate buttons below the time fields. The individual date/time fields can also be incremented or decremented using the small direction keys adjacent to each field.
If specifying an interval, you select the interval length (30 minutes, 60 minutes or 24 hours) then check one of the radio buttons to indicate whether the data is to be fetched once (Now) or repeatedly. If repeating, the data is fetched immediately and then the browser page will refresh at the period of the selected interval.
In the event of there being any problem with a query an explanatory message will be displayed in the 'Status' panel.
Pressing this will always display a table listing actions you have already scheduled, showing the details of the data to be retrieved, how it is made available to you and when it last ran. Each line ends with a checkbox which should be activated if you wish to delete that action; pressing the "Edit schedule" button will then delete all actions for which deletion has been requested.
In addition to listing existing actions, pressing the "Edit schedule" button will also create a new action if the data selection fields of the form are set appropriately. Specifically, this will happen if a repeating retrieval is requested for a recent interval. The retrieval will be run at the same interval as the length of the period it covers - either 30 minutes, 60 minutes or 24 hours.
The 'offset' field enables you to set the initial time at which the action should run. This is set by default to the length of the repeat interval. For example, for a 24 hour repeat interval the default offset is 1440 minutes (= 24 hours), so the action is regarded as having last run 24 hours ago. It will therefore be run for the first time immediately (within the next 5 minutes), and will run every 24 hours thereafter. If the offset is set to 720 minutes, the action is regarded as having last run 12 hours ago, so will next run in 12 hours.
As with immediate retrievals, information on any problems is given by an explanatory message displayed in the 'Status' panel.