Thanks to Giorgio, IK1UWL, an Italian translation of the WSPR 2.0 User's Guide is now available. A link has been placed on the WSJT/WSPR web site:

http://physics.princeton.edu/pulsar/K1JT/wspr.html

... or you may click on a direct link to the Italian version,

http://www.physics.princeton.edu/pulsar/K1JT/WSPR_2.0_User_Italian.pdf

The WSPR 2.0 manual is now available in English, French, German, Italian, Japanese, Polish, Portuguese, and Russian. Translations into other languages will be welcome. If you are interested in undertaking this task and would like a copy of the original MS Word file in English, please let me know.

-- 73, Joe, K1JT

Thanks to Nobuyuki Oba, JA7UDE, a Japanese translation of the WSPR 2.0 User's Guide is now available. A link has been placed on the WSJT/WSPR web site:

http://physics.princeton.edu/pulsar/K1JT/wspr.html

... or you may click on a direct link to the Japanese version,

http://www.physics.princeton.edu/pulsar/K1JT/WSPR_2.0_User_Japanese.pdf

The WSPR 2.0 manual is now available in English, French, German, Japanese, Polish, Portuguese, and Russian. Translations into other languages will be welcome. If you are interested in undertaking this task and would like a copy of the original MS Word file in English, please let me know.

-- 73, Joe, K1JT

This is an embarrassment of riches, caused by my own poor memory.

In addition to the one mentioned in my announcement a few minutes ago,
a German translation of the WSPR 2.0 User's Guide has also been prepared by Klaus Korn, DJ6LB.

I apologize to both Klaus and Ray, DL3LST, for encouraging them both to work on this task without either one knowing that the other has been given the go-ahead. (As it happens, Karl Schmidt, DK5EC, also volunteered -- and I did remember to tell Karl that a translation was already underway.)

This is my fault, entirely. Sorry, guys!

Since I don't know what else to do, I am placing links to both German translations on the WSJT/WSPR web site:

http://physics.princeton.edu/pulsar/K1JT/wspr.html

You can take your pick! A direct link to the DJ6LB version is

http://www.physics.princeton.edu/pulsar/K1JT/WSPR_2.0_User_German_2.pdf

-- 73, Joe, K1JT

Thanks to Rainer Streubel, DL3LST, a German translation of the WSPR 2.0 User's Guide is now available. A link has been placed on the WSJT/WSPR web site at

http://physics.princeton.edu/pulsar/K1JT/wspr.html

... or you may click on a direct link to the German edition,

http://www.physics.princeton.edu/pulsar/K1JT/WSPR_2.0_User_German.pdf

The WSPR manual is now available in English, French, German, Polish, Portuguese, and Russian. Translations into other languages will be welcome. If you are interested and would like a copy of the original MS Word file in English, please let me know.

-- 73, Joe, K1JT

Thanks to Krzysztof Dabrowski, OE1KDA, a Polish translation of the WSPR 2.0 User's Guide is now available. A link has been placed on the WSJT/WSPR web site:

http://physics.princeton.edu/pulsar/K1JT/wspr.html

Translations of the WSPR 2.0 User's Guide are now available in French, Brazilian Portuguese, Polish, and Russian. Translations into other languages will be welcomed; if you are interested in doing this and would like a copy of the original MS Word file in English, please let me know.

-- 73, Joe, K1JT

Do not be deceived by the statistics of randomly fluctuating quantities.

At signal levels close to the WSPR threshold, successive measurements of S/N will not be identical. This is a measurement issue, and is true even in the absence of actual signal fading. Upward and downward fluctuations are equally likely and will have similar magnitudes when stated as power levels. But when stated in dB, downward fluctuations will be much larger than upward ones.

Suppose the average ratio of signal to noise is 0.0015, with measurement-to-measurement fluctuations of +/-0.0010. (These are perfectly reasonable numbers for a marginal WSPR signal.) Then in dB we have

S/N (upward) = 10*log(0.0025) = -26.0 dB
S/N (average) = 10*log(0.0015) = -28.2 dB
S/N (downward) = 10*log(0.0005) = -33.0 dB

So occasionally you'll see WSPR report S/N values as low as -33 dB, because of measurement fluctuations, even if the "true" S/N was -28 dB.

Thanks to Vlad, UA6JD, a Russian translation of the WSPR 2.0 User's Guide is now available. A link has been placed on the WSJT/WSPR web site:

http://physics.princeton.edu/pulsar/K1JT/wspr.html

We now have translations of the WSPR 2.0 User's Guide in French, (Brazilian) Portuguese, and Russian. Translations into other languages would be very welcome; if you are interested in doing this and would like a copy of the original MS Word file in English, please let me know.

-- 73, Joe, K1JT

Many thanks to Rafael Haag, PY3FF, for translating the WSPR 2.0 User's Guide into Brazilian Portuguese!

The following link has been placed on the WSJT/WSPR web site:

http://www.physics.princeton.edu/pulsar/K1JT/WSPR_2.0_User_Portuguese.pdf

-- 73, Joe, K1JT

Thanks to Michel, F1ERG, a French translation of the WSPR 2.0 User's Guide is now available. The following link has been placed on the WSJT/WSPR web site:

http://physics.princeton.edu/pulsar/K1JT/wspr.html

Now is a good time to mention that translations into other languages will be very welcome, and I will be happy to post them on the web site as well. If you are interested and would like a copy of the original MS Word file in English, please let me know.

-- 73, Joe, K1JT

WSPR 2.0 was downloaded 1157 times over the past 3.5 days. The most recent full day summarized in the WSPRnet database shows 567 distinct callsigns reported.

This level of interest is great, but...

Recently, especially on the 30m band, I've noticed many cases of failures to decode caused by two or more WSPR signals QRMing one another. Lest WSPR's increasing popularity contribute to its own downfall, let me suggest that users should consider moving some of their WSPRing time to less-occupied bands. Sunspots are (finally!) starting to pick up, so we should be probing potential propagation paths on some of the higher bands. Similarly, it's always fun to see what can be done at night, or perhaps along the "gray line", on the low bands.

Let's spread out more, over our available bands!

A second, unrelated item: