[Xtide-announce] annual data refresh

[David Flater]

Available from http://flaterco.com/xtide/files.html

harmonics-dwf-20161231

   Imported NOS data from snapshot 2016-12-18.

   Changed the definition of constituent 3KM5, which is used only by
   Anchorage (9455920), from 3*K1+M2 to K1+M2+K2.
   - When calculated by Congen, K1+M2+K2 is close to but not exactly the same
     as a phase reversal of 3*K1+M2.
   - 3*K1+M2 was consistent with the 2006 IHO list.
   - Both IOS and the unidentified YEARDATA.dat application instead used
     K1+M2+K2.
   - The K1+M2+K2 definition decreases the differences between XTide's
     predictions and those of NOAA's web service.
   Details on the investigation of 3KM5 and the other constituents that were
   called into question last year are temporarily available at
   flaterco.com/xtide/news.html under To do / Congen.

   The Narrows, north end (midstream), Washington Current no longer matches
   NOAA predictions and has been expired along with all dependent subordinate
   stations.  PCT1766 was superseded by PUG1524 (3 different depths).
   AFAICT, harmonic constants for currents still have not been published on
   the NOAA web site.

   The erratum for Texaco Dock was removed because it matched predictions
   retrievable from the NOAA web site without adjustment.  The erratum for
   Helmick Point was retained by default as no predictions were retrievable.

   Fixed typo in Pillar Point Harbor, Half Moon Bay.

harmbase2-20161231

        PostgreSQL 9.6.1.

        Changed the definition of constituent 3KM5, which is used only by
        Anchorage (9455920), to reduce differences with predictions from
        NOAA's web service.

        Moved Western Aleutians longitude fix from importNOSST.pgcc to
        preparse_tide_predictions_pages.rb.

        Ported improved coordinate-matching code of NOSSC back to NOSST.

        Make use of previous year's data for disambiguating states of
        subcurrents.

        Enhanced sample.rb to bring up NOAA prediction pages for comparison
        and moved from scripts to nos subdir.

        Purged unused scripts.

Regards,

DWF