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- In normal mode, a group of trajectories is specified starting from the same point but at different times. Several starting points (thus several groups of trajectories) can be defined for a single FLEXTRA run.
- In cet mode, trajectories are generated starting from the points of a user-defined uniform grid in a three-dimensional domain.
- In filight flight mode, both the starting location and starting time for each trajectory can be set individually. This mode is useful to calculate e.g. trajectories released along the flight track of an aircraft.
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Specify the geographical area of the start grid by a S/W/N/E list.
Flextra Cet Dx
Specifies the start grid resolution in West-East direction in degrees when Flextra Run Mode is set to cet. The default values value is 1.
Flextra Cet Dy
Specifies the start grid resolution in South-North direction in degrees when Flextra Run Mode is set to cet. The default values value is 1.
Flextra Cet Top Level
Specifies the top level of the start grid volume when Flextra Run Mode is set to cet. The default values value is 1.
Flextra Cet Bottom Level
Specifies the bottom level of the start grid when Flextra Run Mode is set to cet. The default values value is 1.
Flextra Cet Dz
Specifies the start grid vertical resolution when Flextra Run Mode is set to cet. The default values value is 1
Flextra Cet Level Units
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Specifies the list of trajectory types a as numerical IDs or a string strings when Flextra Run Mode is set to flight. The possible values are as follows:
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The default value is 1 (three-dimensional trajectories).
Flextra Flight
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Name
Specifies the trajectory names name when Flextra Run Mode is set to flight.
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Specifies the starting dates of the trajectories when Flextra Run Mode is set to flight. The format is HHH[:MM[:SS]. The default value is: 6 (i.e. 6 hours).is YYYYMMDD.Relative dates are allowed: e.g. -1 means yesterday, 0 means today, etc.
Flextra Flight Starting Times
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Specifies the factor by which the time step must be smaller than the time interval of the wind fields. This factor must be >1! The default value is 2.0.