Nexus RACE BOX, Инструкция по установке и эксплуатации

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English RaceBox
38
APPENDIX D – POLAR FILE FORMAT
The NX2 system together with the NX2 Race SW is able to calculate target Boat Speed
from a Polar Table. The polar tables looks different for different boats.
The polar table is a tab- or comma-separated-values text file containing target
boat speeds for specific true wind angles and speeds.
Every row represents data for a specific true wind speed (except first row,
which contains the headings of the table and is ignored).
First column contains true wind speeds in knots, then, the following columns
are pairs of target boat-speeds for a specific true-wind angle.
The first and last pair of TBS-TWA columns are the best case up-wind and
down-wind, respectively, and these columns are used to compute optimum
course up- or down-wind, respectively.
NX2 Race SW interpolates and extrapolates the data to give continuous
TBS and steering course. To achieve that, the file must contain a minimum of
5 column-pairs of TBS-TWA, but no more than 20, and a minimum of 3 data lines,
but no more than 20.
So, including the column with wind speeds, the polar table should have a
total of minimum 11 columns, but not more than 41.
The format of a polar table is:
TWS TBS1 TWA1 TBSn TWAn <-- 1st row for table headings (no data here!)
WS1 BS11 WA11 BS1n WA1n <-- 2ns row for a wind speed of WS1[kts]
WSm BSm1 WAm1 BSmn WAmn <-- mth row for a wind speed of WSm[kts]
last column-pair is best case down-wind
other column-pairs TBS-TWA
first column-pair is best case up-wind
1st column contains wind speeds in [kts]
In the above representation, WS1-WSm are (m) true wind speed values in [kts],
BS11-BSmn are (m x n) target boat speed values in [kts], and WA11-WAmn are
(m x n) true wind angle values in degrees, where:
3 <= m <= 20 , and
5 <= n <= 20
Wind angles must have the same value on a given column, excepting the first
and the last wind-angle columns, which are a special optimum case.
There must be no empty rows in the file, except for one row at the beginning
(the heading row), which is ignored (and therefore put no values in there).
All values must be separated with either tabs or commas (not spaces) and all
rows must contain the same number of values (i.e. if row2 has 13 values, all
other rows should have the same number of values).