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  • Caribbean Emergency Weather Net (CEWN)

    Amateur radio operators are providing emergency communications in the wake of Hurricane Maria.

    7.188 and 3.815 MHz LSB

    This is mainly health and welfare information - family members and friends asking about each other.

    At one point, I could hear both the Puerto Rican station and the US station who were having great difficulty hearing each other. Surprisingly there was no other ham on the frequency to help.

    I was listening via a Florida Kiwi, half way between the two. It strikes me that the availability of these receivers to ARES operators to assist in relaying messages would be important.

    If that did become the case, there would be a need for a priority operator to be able to kick casual listeners off in order to use a receiver. I am not sure if John has considered these kinds of protocols, but it may be time to start thinking about how that might work.

    The new propagation display on the VE3SUN list makes it easy to find stations with good propagation on the needed frequency. but there are some bugs to iron out still :)

  • A new Receiver list with sorting and station saving

    Thanks Martin.

    It really helps to know what users would like to see as we all have different interests and habits.

    You are thinking exactly on the lines that I am. I haven't quite figured out the best way to get there yet. One possibility is to incorporate the propagation into the map. Here is an example showing the propagation from/to John's receiver on 20 meters the other day. The hot spots are where the SNR should be best (absent solar flares).


    But that is a bit too complicated, maybe.

    The other option is to have a propagation table like this one that is already in DX Monitor, so easy to replicate:


    Both images based on VOACAP path analysis from the transmitter to the receiver.

    So many projects - so little time - which explains why this one has been on my mind for so many years.

  • A new Receiver list with sorting and station saving

    I have been fiddling with my sortable list of current stations.

    the data comes from John's page of active receivers - thank you, John.

    Check out the features and let me know where to go from here.

    Currently there is an azimuthal map that can be dragged around to sort the list of receivers by distance from the center point.

    It is also possible to enter the callsign of a station in the database. Currently the list contains 8,000 odd hams who have entered their locations in my hamlocator page and a few new stations such as CHU, WWV, WWVH, etc. Entering a known station finds the closest receivers (not necessarily the ones with the best propagation - but that is on my list for the future) and a frequency, if known. Please feel free to add to the database with your own favorite station.

    The list an be sorted by distance, country, gridsquare (longitude) and frequency.

    I would like to add propagation prediction and some merit value for each receive station on the desired frequency. Later...