Reposting as a seperate Topic: Difference in Heat maps between time variant and non-time variant (Identical model) results

Balaji Viswanadh Gollapalli

In my analysis, I observed that, the time variant and non-time variant simulation results are not exactly identical in the entire prediction area (As we would usually expect). I observe sharp differences especially towards the edges of the prediction area.

- I tried to view the 4D prediction to confirm whether the models and transmitters are exactly identical. However, my ProMan hanged responding very very slowly.

- I also tried to export results and compare, However the time variant simulation's ASCII file is huge (~700-800 MB). This could be because time variant model is exporting data for all time instances.

 

Please advise if there is a way I can find out the reason for differences am observing between time variant and  non time variant (exactly identical to time variant) ProMan simulations.

One way to understand this is to find out if we can extract data only for the single time instant and/or if we can 3D view to compare the prediction plane (time variant and non time variant simulations) without ProMan hanging.

Your help is highly appreciated.

 

Thanks

Balaji

Reiner_Hoppe

Typically in a time-variant scenario there are some moving objects, otherwise you can use a stationary scenario.

In case of moving objects the results will change depending on the position of the moving objects (for each of the simulated time steps).

 

In WallMan you save a definable shapshot of a time-variant database as stationary *.idb file:

 

Then you can use this stationary database for comparison.

Or you just define the start and end time of the simulation parameters to 0s in your ProMan project under the Simulation tab. In this case only the result at t = 0s will be computed. 

 

Generally you can compare the results (e.g. Rx power given in *.fpp files) in ProMan via loading one result (either via the result tree in the loaded project or via 'File => Open Result' and then subtract the other result via Edit => Subtract Data => Value (File, linear). In case of subtracting a stationary result from a time-variant result you will get the following dialogue, but after confirming with Yes the difference will be displayed:

 

Which propagation model do you use (DPM, SRT, IRT)?

Based on this we can investigate further.