Q) Maps are not shown / Maps are not updating automatically. What can I do?
Q) Why some callsigns are shown in different colours (blue, green, black....)?
A) The colour of the callsigns indicates the source of the information for a given report:
- Black (like XX0XX) are spots from the DX-Cluster
- Blue (Like XX0XX) are spots coming from the WSPR network
- Green (Like XX0XX) are reports from the Reverse Beacon network
- Magenta (Like XX0XX) are FM-SWL reports coming from FMList
- Brown (Like XX0XX) are AIS, APRS and WSJT-X reports sent using AIS DX Aggregator, APRS DX Aggregator and WSJT DX Aggregator.
Additionally you will see some callsigns remarked on a yellow background (like XX0XX). These are the DXMAPS supporter users. This is, users who are contributing to keep the server running.
Q) I'm not interested in WSPR, RB and APRS spots. How to do it to view only human made
Q) I'm not interested in FM-SWL spots. How to do it to view only amateur radio reports?
A) Simply tick the "Only DXC" option.
Q) Can I see a listing of the contacts, instead of a map?
A) Yes. Simply select the "List" tab at the top-left corner of the maps. You can also select "Graph" to get a band-scope view.
Q) Why the DX-spots I sent from DXMAPS are not shown?
A) That could be done for a good number of reasons. First of all you have to understand that when you send a DX-Spot from DXMAPS pages, it is not directly incorporated to the database, but sent to the DX-Cluster network. When that spot is received back from DX-Cluster, as all spots from other stations, is analyzed by a sophisticated routine that filters out spots that apparently are not real spots. You would be amazed to know that more than 25% of spots flowing thought the DX-Cluster are not reporting a QSO, but are the result of misusing the network to cheer each other, ask questions, complain about something, etc. There are also many spots which frequency is clearly wrong, or that the spotted grid square is outside the boundaries of the country of the reported station, etc.
Reports below a certain distance threshold are also discarded, as they are not considered DX. The minimum distance depends on the band.
Some basic rules to make sure your spots are not filtered out:
- Don't write useless comments. Texts like "Hello" or "Please" for instance will possibly lead your spot to be filtered out as it will not be considered the report of a QSO.
- Make sure that your grid square/locator is correct in the callbook
- Make sure that the reported data (callsign, frequency, grid square, etc.) are all correct.
Q) Is there an historical record of the maps and QSO?
A) Yes. You can query the database and and also look at former 2m animated sporadic-E maps.
Q) When I put a comment it shows both locators then my comment. How do I eliminate the locators from my comments?
A) Locators are the most important information you can add when sending a spot, as it shows the exact location of the stations, and allow DXMAPS to make the calculations. I don't understand any reason why you would like to eliminate the locators, but if that is really so important for you and you want to take the risk that your spot could be filtered out you can always send an unformatted spot.
Q) The service is free, but how is it funded? Can I make a donation to contribute keeping the service up and being improved in the future?
A) Yes, the service is free and it will continue being free. However it requires hiring a powerful server with an approximate cost of US $250 per month. This cost is covered thanks to the donations of supporter users and to the advertising. If you like the service please consider some kind of donation.
Q) What are the little red dots that I sometimes see on the lines?
A) They mark the estimated ground reflection points in multi-hop sporadic-E paths. They are only an estimate based on the geometry and as such should be interpreted.
Q) What are the blue lines that appears across the world maps?
A) They are the geomagnetic equator and tropics. An interesting reference for north-south and TEP propagation. If you don't want to see it you can disable it in the Layer options.
Q) How can I post FM DX spots?
A) Please use FMLIST to report the received FM station on-line. As soon as you spot it there it will be also shown in DXMAPS maps.
Alternatively you can also use DXMAPS form to spot FM stations, but in that case you will have to indicate the Locator of the spotted station, so that the system can locate it.
Q) Can I post VOR spots?
A) Yes, simply use the format VOR/xxx (being xxx the callsign of the VOR). If you don't know the Locator of the VOR leave that box blank and the system will try to take it from the VOR database. This is an example of how to spot VOR CDP (Capdepera) on 112.900 MHz.
Q) I have an AIS receiving station. Can I post AIS spots?
A) Yes, simply download the AIS DX Aggregator program that will automatically upload AIS DX spots to DXMAPS.
Q) I have an APRS station. Can I report the DX reception of APRS stations?
A) Yes, simply download the APRS DX Aggregator program that will automatically upload APRS DX spots to DXMAPS.
Q) I use WSJT-X for JT65 and JT9 modes. Can I automatically send DX-Spots to DXMAPS?
A) Yes, simply download the WSJT DX Aggregator program that will automatically upload DX spots to DXMAPS.
Q) Sometimes the maps cover the last hour, but sometimes only the last minutes. Why does this happen? Can I configure it?
A) In order to keep the maps readable the number of QSO lines visible at a certain time on a certain map has to be restricted to 300. Showing more QSO lines would end up in an unreadable and useless map. If the number of visible contacts/reports is 300 or less then the map will cover the last hour. Otherwise the time span shown will correspond with the most recent 300 contacts/reports.
Take into account that, specially in the most popular HF bands, it is not unusual to have more than 100 QSO reported per minute, specially through the Reverse Beacon network, so it could happen that if you don't apply some kind of filtering you only see the contacts/reports of the last 2 or 3 minutes. In those cases you should consider filtering by "DX-Cluster only", or by some mode, or restrict the map to a regional area.
Q) Is there some tutorial on how to use DXMAPS?
A) You can read the user manual.