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.

Im on automatic operation on dial 10.13865 (so I can catch Eu QRPP MEPT's with mixed WSPR content in the visual 10,140000 to 10,140100 range) Tx carrier 10140161 or near at 20% until advised; and on the smaller tx/rx modified Radio shack CB whip with the rabbit ears top loading.

We have had to move out of sections on the property as we have infestations of insects which have to be removed inc all woodwork - gives a whole new meaning to bug key...

Just checked back over todays reports:-

2008-05-23 11:24 G8EUX 10.140150 -7 0 IO92md +33 1.995 G8EUX IO92md 0 0

anybody say how that was done? I use automatic spot upload. However, I noticed that my PC clock was out this morning - it keeps excellent time mostly, but I think the anti-virus did a download this morning, which may have slowed the clock.

Peter G8EUX

Coming home this evening from the shipyard I couldnt but notice the huge front end of what looked like the USS Enterprise in the guise of a massive Cumulo Nimbus cloud. With mulitple rainbow aura's up above the front of the "ship" it was an impressive and scary site as I hadnt taken down my fishing pole which the local CuNb tries to use as targetting weapons diguised as lightning bolts. It was pretty quiet for the past 4 days on LF, and 80m Eu sigs were received here, but last night the normal 20 over peaks were back making a hash of the decodes.

My new 8 Unit Multimode MEPT is on test on 10.140073 MHz. Running WSPR only in every 2 minute slot in order to check timing drift free running.
The complete TX uses 4 IC's. It consumes 53mA at 12Volts, Solar Powered, for 40mW RF output. Presently the Antenna is a low sloping 1/2 Wave Dipole for 10MHz.

No need for a Power Hungry Computer and Transceiver or Attenuators to throw away the power you just generated :-)

My Multimode + WSPR MEPT is back on 10.140073MHz from approx 15.00 GMT today 12 May 2008.

Further developments are afoot these will affect the 'other' visual modes.

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 !