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94 lines
2.9 KiB
Plaintext
94 lines
2.9 KiB
Plaintext
:doctype: manpage
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:man source: AsciiDoc
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:man version: {VERSION}
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:man manual: WSPRD Manual
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= wsprd(1)
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== NAME
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wsprd - is a decoder for K1JT's Weak Signal Propagation Reporter (WSPR) mode.
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== SYNOPSIS
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*wsprd* ['OPTIONS'] ['FILE']
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== DESCRIPTION
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*wsprd* - The program is written in C and is a command-line program that reads
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from a .c2 FILE or .wav FILE and writes output to the console. It is used by
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WSJT-X for wspr-mode decoding.
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== OPTIONS
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*-a <path>*:: Path to writeable data files, default="."
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*-c <file>*:: Write .c2 file at the end of the first pass
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*-e x*:: x is transceiver dial frequency error in Hz
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*-f x*:: x is transceiver dial frequency in MHz
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*-H* :: do not use, or update the hash table
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*-m* :: decode wspr-15 .wav file
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*-q* :: quick mode - does not dig deep for weak signals
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*-s* :: single pass mode, no subtraction (same as original wsprd)
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*-v* :: verbose mode, shows duplicate decodings
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*-w* :: wideband mode - decode signals within {plus}/- 150 Hz of center
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*-z x*:: x is fano metric table bias, default is 0.42
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The FILE can be either .wav or .c2, for example:
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-----
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./wsprd -wf 14.0956 140709_2258.wav
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-----
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*NOTE* for .c2 files, the frequency within the file overrides the command
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line value.
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== FEATURES
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* By default, *wsprd* reports signals that are within {plus}/- 110 Hz of the
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subband center frequency. The wideband option (-w) extends this to {plus}/- 150 Hz.
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* *wsprd* maintains a hashtable and will decode all three types of wspr
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messages. An option (-H) is available to turn off use of the hashtable.
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* The symbols are decoded using Phil Karn's sequential decoder routine, fano.c
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== NOTES
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. This program attempts to maximize the number of successful decodes per transmit
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interval by trying to decode virtually every peak in the averaged spectrum.
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The program also implements two-pass decoding, whereby signals that are successfully
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decoded are subtracted one-by-one during the first decoding pass. Then, the
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decoder is run again. In many cases the subtraction process will uncover signals
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that can then be successfully decoded on the second pass.
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. There will be occasional duplicate decodes when two closely spaced
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peaks come from the same signal. The program removes dupes based on callsign
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and frequency. Two decodes that have the same callsign and estimated frequencies
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that are within 1 Hz will be treated as decodes of the same signal. This
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dupechecking is turned off with the -v flag.
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== AUTHORS
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Joe Taylor, K1JT and Steven Franks, K9AN
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== COPYING
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*WSPRD* is Copyright (C) 2015 by Joseph H. Taylor, Jr., K1JT,
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and Steven Franke, K9AN, with contributions from additional authors.
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*WSPRD* is Open Source software, licensed under the GNU General Public
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License (GPLv3).
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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