The concentration data are given in normalized form according to

with

* c ^{+}* normalized concentration [-]

* c _{m}* measured concentration [-]

*
H * building height [m]

* U _{H}* wind velocity at height

* Q _{l}*
emission rate of line source [m

The normalized concentrations *c ^{+}* have been measured at positions

The data files (see Data base) containing the concentration data are structured as follows:

column#1 | column#2 | column#3 |

y-coordinate | z-coordinate | y-coordinate |

y+ = y/H | z+ = z/H | c+ |

... | ... | ... |

... | ... | ... |

... | ... | ... |

**Remarks:**

Each data file contains a number of 700 grid points. There is always one file for wall A concentration data and one for wall B (see Data Base)

For wind directions 90° (perpendicular to street axis) and 0° (parallel to street axis), the symmetric boundary conditions with respect to x-z-plane and y-z-plane, respectively,

have been utilized. However, in order to assure a higher measurement data quality, concentration measurements at both symmetric positions have been performed.

The concentration data given in column#3 is the mean concentration of both