Horizontal simulation

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Horizontal simulation

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This simulation corresponds to cross sections in the horizontal plane in exterior at a define height. Buildings and roofs are taken into account for the position of the receivers. The domain of simulation is represented by a polygon.

The icon is Calcul horizontal.

Settings

Calcul horizontal

Horizontal simulation

Receiver resolution: distance between receivers.

Height: height at which the map will be made. A simulation with a constant height follows the relief. It is possible to simulate at several heights in one time. For this, enter heights separated by a ";".

Altitude: altitude at which the map will be made.

Use buildings for points: Building are used as a break line of the meshing triangulation. For each vertex of the buildings, a receiver is created (and along the facade) with an offset of 10 cm. The option is used for results accuracy and to compute max level in building (map).

Meshing method: (Regular/Irregular/Progressive).

oRegular meshing: Regular positioning of receivers over the entire simulation area. The receivers are not positioned inside buildings.

Maillage régulier

Regular meshing

oIrregular meshing: Positioning of receivers with greater density in zones close to the antennas. This makes it possible to run simulations much faster in zones where the level is lower. The Irregular method makes it possible to specify a second resolution, Receiver rez 2, which is applied beyond a distance from the antennas (Mini dist.transmitt.).

Calcul maillage irrégulier

Irregular meshing

Maillage irrégulier

Irregular meshing

oProgressive meshing: Distance between receivers decreases from the antenna over the entire simulation area. Coefficient is the coefficient to decrease the density of receivers (function of distance) in the meshing. We recommend values between 1.05 and 1.001. The receivers are not positioned inside buildings.

Maillage irrégulier

Progressive meshing

 Let’s see an example of some progressive coefficients on horizontal domain. If the coefficient increases a little bit, the number of receivers and therefore the calculation time decrease a lot.

Coefficient

Number of receivers

Computation Time

1

1 337 283

10 m 47 s

1.05

6 961

1m 05 s

1.01

73 184

1m 20 s

1.005

173 038

1m 53 s

1.001

675 746

5m 08 s

1.1

2 340

1m 05 s

 

Advise: Use regular meshing in urban areas, irregular meshing in large rural areas, and progressive meshing in huge domains.

note

Horizontal simulations take into account the roofs for the positioning of the receivers.

Calcul horizontal avec toiture

Horizontal simulations with roofs