The Weak Signal Propagation Reporter Network is a group of amateur radio operators using K1JT's MEPT_JT digital mode to probe radio frequency propagation conditions using very low power (QRP/QRPp) transmissions. The software is open source, and the data collected are available to the public through this site.

This is an interesting bit of activity, and has really captured my interest. I have played with both PropnetPSK and with the "self-reporting" feature in the digital interface within Ham Radio Deluxe, but find this the most intriguing, particulary for low power propagation reports.

I am 47 years old, and currently living near Oxford, England, working for the U.S. Embassy here in London. My home call is K2PI. I have also held the calls ON9CPI, LZ/K2PI, XUF2B, XU2FB, HS0ZCI and KE2FB/DU3, among a few.

I have been asked how do I make the spot plots, which appear on http//
Below are a few tips (probably there are other ways to do it - so it is just one method):
1- Filter the data of interest (by band/callsigns/etc) from the spots page and copy it (ctrl-A, ctrl-C)
2- Open Wordpad and "paste special", "Unformated text", then "save as" .txt
3- Open the txt file with excel using "space" as separator
Now the rest is just Excel data manipulation - the purpose is not to give you an excel course or to rewrite the best seller "excel for the dummies", but just a few tips

I just wanted to make it clear to everyone that I didn't mean to criticize anyone's operation by the "WSPR, don't shout!" article below. It was just a play on words, not a directive. I had noticed that the average power levels were rising, and I was curious about that.

Some statistics from the meptspots database downloadable from the wsprnet website (update 0735z 8-May-2008). There are 402 reporters and the top ones are VE1VDM (with 27969 reports) followed by K1JT (24892) and W1BW (23269), while the most heard stations (1863 as total) are K1JT (27047 reports), VE1VDM (23709) and WB3ANQ (22160) [IV3GTH, I2KBD and IK1RKU among the italians]. The longest distance WSPR report is PA3ABK heard by ZL1ANY with 11937 miles (not counting the strange callsign/grids reported which seem wrong decodes). F1VS and F8RZ heard by ZL1BPU (11831 and 11811 miles).

As already mentionned,the current WSPR recommended frequency is far from being ideal for WSPR users located in Europe.
A certain number of Region 1 countries still has 7.100 as upper band limit, therefore 7076 is in the middle of the SSB segment, which makes the frequency unusable (at least on RX), especialy in the evening and early morning (when the SSB activity is maximal and the conditions still favorable for continental distances). This almost forbid the band to be used for tests with AS and OC both at short path (EU-evening) and at long path (EU-morning).

Here's a graph of the number of WSPR spots in the database and the number of reporting stations over time.

In the last week or two, the average power of a WSPR spot in the database has increased about 4dB, to the point where we're now averaging about 2W; we were down at about 0.7W 2-3 weeks ago. The high-power ET3AA operation accounts for about 1dB of that average, so even throwing those out, we've still doubled our average power in the last week or two.

Attached is a graph of mean SNR, Power, and SNR-Power over WSPR's lifetime. One can clearly see the release of better decoder in v0.6 in mid-April, as the mean SNR takes a nice drop.

The Multimode + WSPR MEPT on 10.140073 will be off for several days from later today 03.May.2008. Being a Manned Beacon, under the licence conditions I cannot leave my Son or XYL in charge.

Google Prop Map on WSPR net provides an idea who is or has been reporting, in particular when one is using the magnification feature of
the Prop Map.

Of course reporting is by no means the same as receiving!

This indicates another reason for a positive indication of who is in the
receive mode and is participating as a reporting station.

Checking in and out to some sort of list or roster would help here.

When starting up WSPR, the program could send a signal to a central
Station is in receive mode AND download mode for frequency

Along the past few days, I have published on my blog several examples of what could be done with the enormous data that is available from the WSPR database.
Among the examples: Receiving antenna evaluation, Station performance evaluation, comparison of 2 transmitting antennas, comparisons betwen VOACAP predicted SNR's and real reports, etc...
It may give you ideas... In the mean time, I would appreciate your comments, suggestions and ideas...
The data is available to everybody: a gold mine !

Even with the automatic real-time upload feature in WSPR >= v0.6, it's still a good idea to upload your ALL_MEPT.TXT file occasionally by hand. This will ensure that any spots which did not make it because of any temporary network or server outage will get recorded. I would suggest once every week or two as a reasonable interval.

The Drift value given in WSPR can be useful yet needs some understanding to interpret. Until recently I personally paid only passing regard to the figure.

An interesting thing is that the only station that does not see drifting banana like signals on the waterfall is the person producing them.

Following recent discussions on Knights QRSS. I think we can come to a few conclusions. The decoded value is the result of drift from the TX station and the Rx station. If the two stations drift in opposite directions the figure will cancel and severe drift could be masked.

I find the results of the "next band" poll very interesting. The winner in a landslide is 6m, with nearly three times the votes of 2nd place finisher 17m. The late surge by 17m, especially after being accidentally omitted from the initial list, make it an excellent candidate for the next HF band.

However, the answers aren't as obvious as they might seem: there is strong geographical bias. All but 4 of the 18 votes for 6m came from EU/UK. All of the votes for 17m were from North America. ...

I just posted poll regarding operations beyond 30m. Please vote based on your interest and ability to operate on a band other than 30m.

During the last week, we've more than doubled the spot rate that we're collecting, and we now have over a hundred regular operators. I think we have enough critical mass to have meaningful operation on one or two (especially if we do day/night).

Here are my personal thoughts:

We're heading into Es season in the northern hemisphere. Most seem to think of this as germane to 10m and above, but it affects lower frequencies as well.

41% (21 votes)
10% (5 votes)
2% (1 vote)
8% (4 votes)
6% (3 votes)
10% (5 votes)
4% (2 votes)
2% (1 vote)
Rotating band du jour
4% (2 votes)
17m (late addition; cancel & re-vote if it's your choice)
14% (7 votes)
Total votes: 51