[[ en:faq:wind]]
Differences
This shows you the differences between two versions of the page.
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en:faq:wind [2012/05/06 06:48] Suratna [How can you see a wind-shift coming?] |
en:faq:wind [2012/08/21 07:29] (current) Suratna [Is the wind constant between two wind updates in LiveSkipper?] |
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| A mis-match of wind arrow direction and the indication in the dashboard data, is an indication that you might not have loaded the [[:en:sailing:wind|last Weather data]], while the server is always using the most recent weather updates. **To correct this**: [[:en:advanced:wind#How to Download the latest wind information|Refresh the browser]] or close the game and re-open it. | A mis-match of wind arrow direction and the indication in the dashboard data, is an indication that you might not have loaded the [[:en:sailing:wind|last Weather data]], while the server is always using the most recent weather updates. **To correct this**: [[:en:advanced:wind#How to Download the latest wind information|Refresh the browser]] or close the game and re-open it. | ||
| ==== Is the wind constant between two grid points?==== | ==== Is the wind constant between two grid points?==== | ||
| - | No, LiveSkipper is using a bi-linear interpolation of the wind conditions at the ½° grid points. You can therefore say that the wind conditions are different on each different spot, unless the rare case that the wind conditions in the ½° grid-points is identical. | + | No, LiveSkipper is using a bi-linear interpolation of the wind conditions at the ½° grid points. You can therefore say that the wind conditions are different on each different spot, unless the rare case that the wind conditions in the adjacent ½° grid-points is identical. |
| + | ==== Is the wind constant between two wind updates in LiveSkipper?==== | ||
| + | Yes, in a 3hrs interval the wind data **at one location** is the same, till the next wind update. \\ | ||
| + | However, sailing in a 3 hrs interval will move your boat from one location to the other and thus you will feel different winds strength and direction, while sailing in the same 3hrs winds data set; wind shifts of 180 degrees are possible in areas of weak winds and passing the eye of a High area or a wind band. | ||
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| ==== What is accuracy of the Grib file, 1° or ½°?==== | ==== What is accuracy of the Grib file, 1° or ½°?==== | ||
| LiveSkipper is using a ½° grid system to collect [[:en:sailing:wind#Updates|NOAA weather data]]. | LiveSkipper is using a ½° grid system to collect [[:en:sailing:wind#Updates|NOAA weather data]]. | ||
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| Big wind direction shifts will show in the ruler, provided you have engaged the auto-heading. | Big wind direction shifts will show in the ruler, provided you have engaged the auto-heading. | ||
| {{:en:faq:faq_windshift.jpg?direct&540|}} | {{:en:faq:faq_windshift.jpg?direct&540|}} | ||
| - | This image shows a sharp corner in the ruler at mark 3, caused by a large wind direction change at 03:00 gmt. | + | This image shows a sharp bend in the ruler at mark 3, forecasted by a large expected wind direction change at 03:00 gmt. |
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| ¹ NOAA - National Oceanic and Atmospheric Administration http://www.noaa.gov/ | ¹ NOAA - National Oceanic and Atmospheric Administration http://www.noaa.gov/ | ||
