Revisions to the cleaned and augmented versions of the logs for the CQ WW CW and SSB contests are now available for the period 2005 to 2017.
Links to the cleaned and augmented logs may be followed here.
The cleaned logs are the result of processing the QSO: lines from the entrants' submitted Cabrillo files to ensure that all fields contain valid values and all the data match the format required in the rules. Any line containing illegal data in a field (for example, a zone number greater than 40, or a date/time stamp that is outside the contest period) has simply been removed. Also, only the QSO: lines are retained, so that each line in the file can be processed easily. All zones are now rendered with two digits, so as to further simplify processing by other parties.
The augmented logs contain the same information as the cleaned logs, with the addition of some useful information on each line. The information added to each line comprises:
- The sequence of four characters that are the same for each entry in a particular log:
- a. letter "A" or "U" indicating "assisted" or "unassisted"
- b. letter "Q", "L", "H" or "U", indicating respectively QRP, low power, high power or unknown power level
- c. letter "S", "M", "C" or "U", indicating respectively a single-operator, multi-operator, checklog or unknown operator category [ the contest organisers have stated that checklogs are not made public, but in fact at least some of them from the early years have been, hence the need for the "C" category ]
- d. character "1", "2", "+" or "U", indicating respectively that the number of transmitters is one, two, unlimited or unknown
- a. QSO is confirmed by a log from the second party
- b. QSO is a reverse bust (i.e., the second party appears to have bust the call of the first party)
- c. QSO is an ordinary bust (i.e., the first party appears to have bust the call of the second party)
- d. the call of the second party is unique
- e. QSO appears to be a NIL
- f. QSO is with a station that did not send in a log, but who did make 20 or more QSOs in the contest
- g. QSO appears to be a country mult
- h. QSO appears to be a zone mult
- i. QSO is a zone bust (i.e., the received zone appears to be a bust)
- j. QSO is a reverse zone bust (i.e. the second party appears to have bust the zone of the first party)
- k. This entry has three possible values rather than just T/F:
- T: QSO appears to be made during a run by the first party
- F: QSO appears not to be made during a run by the first party
- U: the run status is unknown because insufficient frequency information is available in the first party's log
- The encoding of some of the flags requires subjective decisions to be made as to whether the flag should be true or false; consequently, and because CQ has yet to understand the importance of making their scoring code public, the value of a flag for a specific QSO line in some circumstances might not match the value that CQ would assign. (Also, CQ has more data available in the form of check logs, which are generally not made public.)
- I made no attempt to deduce the run status of a QSO in the second party's log (if such exists), regardless of the status in the first party's log. This allows one cleanly to perform correct statistical analyses anent the number of QSOs made by running stations merely by excluding QSOs marked with a U in column k.
- No attempt is made to detect the case in which both participants of a QSO bust the other station's call. This is a problematic situation because of the relatively high probability of a false positive unless both stations log the frequency as opposed to the band. (Also, on bands on which split-frequency QSOs are common, the absence of both transmit and receive frequency is a problem.) Because of the likelihood of false positives, it seems better, given the presumed rarity of double-bust QSOs, that no attempt be made to mark them.
- The entries for the zones in the case of zone or reverse zone busts are normalised to two-digit values.