| 单词 |
4-d chart |
| 释义 |
4-D chart 4-D chart[¦fȯr ¦dē ‚chärt] (meteorology) A chart showing the field of D values (deviations of the actual altitudes along a constant-pressure surface from the standard atmosphere altitude of that surface) in terms of the three dimensions of space and one of time; it is a form of a four-dimensional display of pressure altitude; the space dimensions are represented by D-value contours, and the time dimension is provided by tau-value lines. |
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