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=== Displaying a World Map View of Active DX Stations ===

  * [[ActiveDXPlotting|On DXView's World Map]]
  * [[ActiveDXPlottingDXAtlas|On the DX Atlas World Map]]
  * [[GoogleEarthPlotting|On Google Earth]]

Getting Started with Spot Collection, Active DX Identification, and Analytics

During the late 1980s and early 1990s, VHF and UHF spotting networks began moving from voice repeaters to VHF and UHF PacketClusters that exploited personal computers. In the mid 1990s, the Internet's Telnet protocol was used to construct a network of DXClusters, making it easy for any DXer to monitor spots -- reports of active DX stations -- on his or her Internet-connect computer.

Being aware of DX stations that are currently active or have recently been active, on what bands, and in what modes provides valuable insight to the modern DXer, particularly if the locations from which a DX station was heard are known:

  • actual (as opposed to forecast) band openings are revealed
  • operating patterns of specific DX stations can be deduced, increasing the probability of making a future QSO

Identifying a currently active DX station as being needed for one or more awards the DXer is pursuing provides the opportunity to make a QSO that will advance award progress.

Viewing raw spots in a scrolling window as they arrive from a PacketCluster or DXCluster requires the DXer to perform the above analyses - a challenging task even with a single source of spots and one or two award objectives. SpotCollector ingests raw spots from multiple PacketClusters and DXClusters and processes them in real time to provide continuous answers to these questions:

  • what DX stations are currently active, on what bands, and in what modes?
  • from what locations is each active DX station being reported?
  • which active DX stations are needed needed for any of the awards the DXer is pursuing?

  • what bands are currently open from the DXer's QTH, and to what continents?
  • what bands have been open from the DXer's QTH at what times in the past, and to what continents?

To accomplish this, SpotCollector captures DX spots from up to 6 spot sources:

  • a local PacketCluster, by way of a Terminal Node Controller (TNC) attached to one of your PC's serial ports

  • the DX Summit spotting network, by way of the #CQDX IRC channel

  • up to four telnet-accessible DXClusters.

Collecting spots from multiple sources is useful because some spot sources report DX from some geographic areas faster than from other areas, and because individual sources can occasionally become unavailable or inaccessible. SpotCollector combines DX Spots for the same station/frequency/mode and stores them in a Database of Active DX Stations on your PC that can be simultaneously displayed in a table, on a world map, in a bandspread display, and to reveal actual propagation:


By using spots to track active DX stations, the DXer can see current band openings from his or her QTH, observe propagation patterns over time, and discover the operating habits of needed DX stations. If you are using DXKeeper to log QSOs and track progress against DXing awards, SpotCollector will use font color to identify active DX stations that are needed for one or more of the DXCC, IOTA, Leaderboard, Marathon, VUCC, WAS, WAZ, or WPX awards you're pursuing, as specified in your DXing objectives; when you work or confirm a needed DX station, SpotCollector automatically updates the information it displays to reflect the new status.

Managing Spot Sources

On installation, SpotCollector comes preconfigured with connection information for several spot sources, but you must specify a username and password before a spot source can be enabled to supply spots. You can also select a different set of spot sources more appropriate to you needs. While all spot sources eventually receive all spots, spots sources closer to a DX station can notify you of that DX station's presence as much as 60 seconds earlier than spot sources located further away. DXers should consider selecting spot sources in Asia, Europe, North America, and South America.

Displaying a Tabular View of Active DX Stations

The Spot Database Display in SpotCollector's main window is a scrollable grid with entries for each DX station operating near a particular frequency in a particular mode. Each Spot Database Entry includes

  • the DX station's callsign

  • the frequency on which the DX station was most recently spotted

  • the mode being used by the DX station (if not specified in the spot notes, inferred based on frequency and the current Sub-band Definition file

  • the first time (in UTC) at which the DX station was spotted near this frequency in this mode

  • the last time (in UTC) at which the DX station was spotted on this frequency in this mode

  • the most recent notes accompanying a spot of this DX station

Spot Database Entries are automatically constructed and updated as incoming DX spots arrive at from spot sources like DX Central. Unless the bands are dead, you should already see a few entries.

You can format the Spot Database Display to present information that helps you understand the behavior of needed DX stations and identify band openings from your QTH:


Armed with this knowledge, you can focus your listening on times and frequencies more likely to be productive.

You can sort Spot Database Entries, and you can filter the Spot Database Display to show only entries matching a particular callsign, DXCC entity, band, mode, continent, origin (location of the stations that spotted the DX) or combinations thereof.

If you are using DXKeeper to log your QSOs, then Spot Database entries will be colored to indicate the impact of a QSO with the spotted station with respect to your DXing objectives :

  • red: a QSO with this station will give you a new DXCC entity/entity-band/entity-mode, or a new IOTA island group, or a new Leaderboard band/mode, or a new Marathon country/country-band/country-mode/zone/zone-band/zone-mode, or a new VUCC grid-band, or a new WAS state/state-band/state-mode, or a new WAZ zone/zone-band/zone-mode/zone-band-mode, or a new WPX prefix/prefix-band/prefix-mode
  • blue: a QSO with this station will give you a new way of confirming a worked but still uncomfirmed DXCC entity/entity-band/entity-mode, IOTA island group, VUCC grid-band, WAS state/state-band/state-mode, WAZ zone/zone-band/zone-mode/zone-band-mode, or WPX prefix/prefix-band/prefix-mode
  • black: a QSO with this station will not advance your progress

You can direct Commander to display a Bandspread Window showing active DX Stations with this color-coding.

There are several ways to determine why a Spot Database Entry's DX Station is needed.

Double-clicking a Spot Database Entry will convey the entry's callsign, frequency, mode, and grid square to Commander, DXKeeper, DXView, PropView, and/or Pathfinder, enabling them to QSY your transceiver to the appropriate frequency and mode, rotate your antenna, display DX information, prepare to log a QSO, prepare to predict propagation, and/or prepare to seek QSL information. If WinWarbler is running,

  • Double-clicking a Spot Database Entry whose mode is PSK31, PSK63, PSK125, or RTTY will convey the entry's callsign, frequency, mode, and grid square to WinWarbler, which will populate its QSO Info panel with this information and direct Commander to QSY your transceiver to the appropriate frequency and mode

  • Double-clicking a Spot Database Entry whose mode is CW, SSB, AM, or FM will only convey the entry's callsign, frequency, mode, and grid square to WinWarbler if that mode's box is checked in the Service column in the Actions with Digital Mode Application connection panel on the General tab of SpotCollector's Configuration window

There are several ways to determine from where an Active DX station is being spotted.

Enabling Audio, Email, and Text Announcements

Displaying a World Map View of Active DX Stations

Displaying a Bandspread View of Active DX Stations

You can display active DX stations on

Displaying a Propagation View of Active DX Stations

SpotCollector can use reports of active DX stations by stations near your QTH to display activity on each band by time of day, and to display activity on each band by continent.

WWV Spots

PacketClusters and DXClusters also convey WWV spots -- reports from the United States National Institute of Standard's radio station WWV that include information relevant to HF radio propagation: the Solar Flux Index (SFI), the Boulder A-index, and the Boulder K-index. Information from the most recent WWV spot is displayed in the Main window's WWV panel. SpotCollector records the information from each WWV spot, and presents it in a graphical view illustrating the behavior of these indices over the most recent 31 days. Clicking the History button in the WWV panel in the upper left corner of SpotCollector's Main window displays the Solary & Geogmagnetic Parameters window:


You can examine each of the three indices individually by checking or unchecking the SFI, A, and K boxes in the lower corners of the display. Given the sun's 27-day rotation period, this information can also be helpful in predicting future HF propagation. SpotCollector automatically conveys this information to PropView.

Automatically Updating the Spot Database and WWV History on Startup

  1. click the Config button to open SpotCollector's Configuration window and select the Spot Sources tab.

  2. in the Initial Cluster command panel,

    1. paste this command into the Command box: SH/WWV/36<13><10>SH/DX/100<13><10>set/dxgrid

    2. check the Enable box

Now when SpotCollector starts up, it will direct each cluster to report the most recent 100 DX spots and the most recent WWV spots

Spot Sources

Using the Spot Database Display

Callsigns Requiring Special Action

Additional Functionality


Improving Performance


Post a question or suggestion on the DXLab Discussion Group

Getting Started with DXLab

CollectingSpots (last edited 2020-04-13 18:24:45 by AA6YQ)