[Lowfer] Can WSPR be compared to a QRSS speed

[JD]

>>> My guess would be that WSPR15 compares with QRSS30, and WSPR2 compares 
>>> with QRSS3.

I would concur with JA's guess.  Most of my WSPR monitoring sessions the 
past two winters, both -2 and -15, have been with an Argo display running 
simultaneously...usually more than one instance of Argo, so that I can 
compare results at different QRSS speeds.  Thus far, I have never seen 
WSPR-2 decode any signal that QRSS3 couldn't see, and I have never seen 
WSPR-15 decode anything that wasn't also visible at QRSS30 rate.

In fact, there have been times when I could see signals that looked quite 
promising on QRSS3 that WSPR-2 couldn't process, but that's mainly the case 
if noise or fading take out part of the WSPR header.  Doesn't matter how 
good the signal is in the rest of the time slot; if the header is too 
damaged, there's not much chance of retrieving anything else.

On the other hand, detection level doesn't tell the whole story.  I don't 
think one should compare methods without taking their data throughput into 
account.  My call sign alone takes  2 minutes 31 seconds to send at QRSS3, 
from the start of the K to the end of the Y without any trailing space; 
whereas WSPR-2 sends a regular size call, grid, and power indication in 1 
minute 50 seconds.  That's considerably more efficient in terms of payload. 
(DFCW comes closer to WSPR-2 in that regard, but still may not quite match 
it.)

John D