Below you will find both documentation of the problems that occur in true wind computation (primarily with automated systems) and program source codes for computation of true winds using meteorological definitions. The meteorological true wind is defined as the generic true wind above with the wind direction being FROM which the wind is blowing. This is opposite the wind direction commonly recorded by oceanongraphers and different from the second Merchant Marine true wind direction, which is referenced to the ship's bow (See Table 1).
For details on the confusion in definitions and the problems found in wind and navigation measurements, please read "Establishing more truth in true winds". This article has been published in the Journal of Atmospheric and Oceanic Technology and contains information on:
The calculations presented in Appendix A are the basis to a set of program codes available for calculating true winds (meteorological) from underway and on-station vessels. We provide the necessary subroutines and a test program in three common languages: FORTAN, C, and IDL (an Interactive Data Language). These programs have all been tested under the Silicon Graphics operating system. WOCE-MET believe the codes will be portable to other platforms, but no tests have been run.
True Wind Manuscript
Program Codes
Language | Webpage (via WOCE) |
---|---|
C | View |
FORTRAN | View |
IDL | View |
MATLAB | View |
Language | Direct Code Access |
PYTHON | truew.py |