> On Jun 9, 2020, at 12:09 PM, Bill Somerville <[email protected]> wrote:
>
> On 09/06/2020 16:51, Rob Robinett wrote:
>> I want sites running my 'wsprdaemon' to benefit from the improved decoding
>> performance of the V2.2 wsprd decoder, but I am not sure how to determine
>> which version of wsprd is installed.
>>
>> wsprd 2.1.x added '-o ...' to the help printout, but there is no such
>> difference between 2.1.x and 2.2.x.
>>
>> Other than looking at the size of /usr/bin/wsprd, is there a more reliable
>> way to determine which version is installed?
>>
>> Thanks,
>>
>> Rob
>>
>> --
>> Rob Robinett
>> AI6VN
> Hi Rob,
>
> there's not much to help you. The ALL_WSPR.TXT file has extra columns since
> WSJT-X v2.2.0.
>
> 73
> Bill
> G4WJS.
>
Hi Rob and all,
FYI, here is a summary of the current format of the ALL_WSPR.TXT file as of
v2.2.0 (the table should be viewed with a fixed-width font):
Sample lines from the ALL_WSPR.TXT file:
yymmdd hhmm snr dt frequency 22 character message 1 2 3 4 5
6 7 8 9
————————————————————————————————————————————————-------------------------------------------------
180909 1630 -21 0.11 14.0971248 W6IPA CM97 20 0 0.29 2 1 0
0 9 1 433
180909 1630 -10 0.02 14.0971298 PA0MLC JO31 37 0 0.59 1 1 0
0 5 1 571
180909 1630 -15 1.39 14.0971346 AA7NM CN86 37 -4 0.47 2 1 0
0 5 1 522
180909 1630 -9 0.24 14.0971593 LA3JJ JO59 37 0 0.26 3 1 -16
0 15 406 -78
180909 1630 -3 0.19 14.0971755 G0CCL JO02 37 0 0.65 1 1 0
0 2 1 602
180909 1630 -28 0.11 14.0971990 ON4LUK JO11 23 0 0.19 1 1 0
0 29 421 -89
Field descriptions:
1. drift in Hz over the duration of the WSPR message
2. sync value [0,1.0]
3. decoding pass {1,2,3}
4. block size, in symbols, used for symbol detection, {1,2,3}
5. dt jitter in samples [-64,64] (multiples of 8 samples)
6. 0 if the decode was obtained by the Fano decoder, 1 if obtained by OSD
7. number of bit errors in the received message
8. Fano iterations-per-bit [1,max_iterations]
9. Fano cumulative metric [-999,810]
Example - consider the 4’th message in the ALL_WSPR.TXT lines given above. The
message “LA3JJ JO59 37” was decoded on the 3rd decoding pass. The sync value
was 0.26, and the decode was obtained based on single-symbol detection, with a
dt jitter of -16 samples. Note that dt offsets are tried in the order 0, -8, 8,
-16, 16, -24, 24, etc. up to maximum offsets of +/- 64 samples. Thus, in this
example we can infer that decodes were attempted at dt offsets of 0, -8, 8
samples before a successful decode was finally obtained at an offset of -16
samples. Finally, fields 6 through 9 tell us that the decode was obtained from
the Fano decoder, there were 15 hard bit errors (i.e. sign errors in the soft
bit metrics), the Fano decoder required 406 iterations per bit, and the
cumulative Fano metric was -78.
I hope that this information will be useful to WSPR enthusiasts.
73, Steve k9an
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