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gprMax (http://www.gprmax.com) is open source software that simulates electromagnetic wave propagation. It uses Yee's algorithm to solve Maxwell’s equations in 3D using the Finite-Difference Time-Domain (FDTD) method. gprMax is designed for simulating Ground Penetrating Radar (GPR) but can also be used to model electromagnetic wave propagation for many other applications.

We hope this will be place users can interact with each other and the developers on topics about using gprMax. Questions, comments and discussion welcome!

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Sepideh Harajchi

May 4

Hi everyone, I want to GIVE my own geometry as a HDF5 to gprMax. I got the output of the simple

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Hi everyone, I want to GIVE my own geometry as a HDF5 to gprMax. I got the output of the simple

May 4

May 2

Identifying Two-way travel time from 2D A-scan Output

Hi, I'm analyzing results from a 2D Ascan I conducted with 6.65GHz antenna to calculate the depth

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Identifying Two-way travel time from 2D A-scan Output

Hi, I'm analyzing results from a 2D Ascan I conducted with 6.65GHz antenna to calculate the depth

May 2

May 1

Issues setting up the devel version

Hi, After getting gprMax 3.1.7 to run successfully (on Windows), I attempted to try the devel branch

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Issues setting up the devel version

Hi, After getting gprMax 3.1.7 to run successfully (on Windows), I attempted to try the devel branch

May 1

Apr 30

set up receiving antenna

Hello, I noticed the '--tlrx-num' option in 'plot_antenna_params.py'. How can I set

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set up receiving antenna

Hello, I noticed the '--tlrx-num' option in 'plot_antenna_params.py'. How can I set

Apr 30

Christian Wheeler, Craig Warren3

Apr 30

Adding pml boundaries inside the model

Thank you very much for your help Kind regards, Tieyu Liu On Monday, April 29, 2024 at 9:24:31 PM UTC

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Adding pml boundaries inside the model

Thank you very much for your help Kind regards, Tieyu Liu On Monday, April 29, 2024 at 9:24:31 PM UTC

Apr 30

Armando Schneider, Craig Warren2

Apr 29

Save Specific Component in a snapshot

Yes, this is possible using the Python API in the 'devel' branch which is currently in beta -

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Save Specific Component in a snapshot

Yes, this is possible using the Python API in the 'devel' branch which is currently in beta -

Apr 29

Apr 28

Receive antenna voltage

Hello team gprMax， I'm studying the use of a half-wave dipole as a receiving antenna to convert

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Receive antenna voltage

Hello team gprMax， I'm studying the use of a half-wave dipole as a receiving antenna to convert

Apr 28

مهرداد کریمی

Apr 25

Tracking rebar in concrete: estimating the power required for gpr

Hi everyone. I tried to place two rebars with a diameter of 3 cm in a depth of 4 meters of concrete.

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Tracking rebar in concrete: estimating the power required for gpr

Hi everyone. I tried to place two rebars with a diameter of 3 cm in a depth of 4 meters of concrete.

Apr 25

Ishtar 23-20, Craig Warren2

Apr 17

merged.out is empty

Can you show the full directory listing off all the output files you are trying to merge? Craig On

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merged.out is empty

Can you show the full directory listing off all the output files you are trying to merge? Craig On

Apr 17

Sepideh Harajchi, Craig Warren4

Apr 14

Plate below the soil box

As the error says you are not specifying the coordinates of the plate correctly - one pair should be

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Plate below the soil box

As the error says you are not specifying the coordinates of the plate correctly - one pair should be

Apr 14

naween dissanayake, Craig Warren2

Apr 13

Reply in your other thread - https://groups.google.com/g/gprmax/c/5Q8h9VC70yg/m/pTv5vL96AAAJ Craig On

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Reply in your other thread - https://groups.google.com/g/gprmax/c/5Q8h9VC70yg/m/pTv5vL96AAAJ Craig On

Apr 13

Zohaib Akbar Khan, Craig Warren2

Apr 13

Snowpack 3D modeling for estimating effective permittivity.

1: Is there any pre defined/built in formual code for CRIM like soil_peplinski etc? Not at present,

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Snowpack 3D modeling for estimating effective permittivity.

1: Is there any pre defined/built in formual code for CRIM like soil_peplinski etc? Not at present,

Apr 13

naween dissanayake, Craig Warren2

Apr 13

You could create the layers and pipes using the geometry primitives in gprMax, eg boxes, fractal

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You could create the layers and pipes using the geometry primitives in gprMax, eg boxes, fractal

Apr 13

城阳, Craig Warren2

Apr 13

I would expect the amplitude of the reflected wave to change since your source and receiver are at

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I would expect the amplitude of the reflected wave to change since your source and receiver are at

Apr 13

城阳, Craig Warren2

Apr 13

Wave cannot return to zero

Can we see a plot of your source waveform and full input file please. Craig On Thursday 4 April 2024

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Wave cannot return to zero

Can we see a plot of your source waveform and full input file please. Craig On Thursday 4 April 2024

Apr 13

Dongyu Du, Craig Warren2

Apr 13

Plugin error in ParaView

Can you confirm you are using the latest version of gprMax from the master branch? Craig

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Plugin error in ParaView

Can you confirm you are using the latest version of gprMax from the master branch? Craig

Apr 13

Dongyu Du, Craig Warren2

Apr 13

Is it possible to set a source array with different phase?

Not directly, but you may be able to achieve what you desire by using a different waveform (with

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Is it possible to set a source array with different phase?

Not directly, but you may be able to achieve what you desire by using a different waveform (with

Apr 13

Ishtar 23-20, Colin Stark3

Mar 26

paraview plugin issue

Typo: that should be gprMax.__version__ On Tuesday 26 March 2024 at 12:42:53 UTC+8 Colin Stark wrote:

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paraview plugin issue

Typo: that should be gprMax.__version__ On Tuesday 26 March 2024 at 12:42:53 UTC+8 Colin Stark wrote:

Mar 26

Parikshit Sah, … Colin Stark4

Mar 22

Getting raw values from Ascan output file

Hi, Thanks for the response, I will give it a try -Sah On Friday, March 8, 2024 at 7:50:39 AM UTC-5

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Getting raw values from Ascan output file

Hi, Thanks for the response, I will give it a try -Sah On Friday, March 8, 2024 at 7:50:39 AM UTC-5

Mar 22

Colin Stark, Craig Warren5

Mar 20

Possible bug in v4: erroneous asymmetry in TWTL sim compared with v3

Craig, I posted an issue on GitHub after testing with a simplified pair of input files. The behaviour

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Possible bug in v4: erroneous asymmetry in TWTL sim compared with v3

Craig, I posted an issue on GitHub after testing with a simplified pair of input files. The behaviour

Mar 20

kashirajvk kalshetti

Mar 19

Regarding gprMax version

Dear sir, which is latest version of gprMax ? and how to check gprMax version on command prompt for

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Regarding gprMax version

Dear sir, which is latest version of gprMax ? and how to check gprMax version on command prompt for

Mar 19

shupeng li, … naween dissanayake5

Mar 19

Image preprocessing

Hi Lishupen, I'm afraid to ask if you could share with me the input file that belongs to the

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Image preprocessing

Hi Lishupen, I'm afraid to ask if you could share with me the input file that belongs to the

Mar 19

naween dissanayake

Mar 19

Salut, Can someone help me to compute a hyperbola-like image attached hbola_s. I always get something

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Salut, Can someone help me to compute a hyperbola-like image attached hbola_s. I always get something

Mar 19

naween dissanayake

Mar 18

Dear All, Even though I can generate geometric shapes I cannot see the Bscan of the input file. Could

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Dear All, Even though I can generate geometric shapes I cannot see the Bscan of the input file. Could

Mar 18

naween dissanayake, Craig Warren4

Mar 18

Sorry - we don't have sample files, only the examples in the gprMax package. Craig On Friday 15

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Sorry - we don't have sample files, only the examples in the gprMax package. Craig On Friday 15

Mar 18

Mar 16

Contributing towards the idea of an AI Chatbot for support

Hey, I'm Akash Rai and currently pursuing my BEngg from NMIT, Bangalore and I wanted to

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Contributing towards the idea of an AI Chatbot for support

Hey, I'm Akash Rai and currently pursuing my BEngg from NMIT, Bangalore and I wanted to

Mar 16

Hideaki Page, Craig Warren2

Mar 14

Understanding the transmission line

Hi Hideaki, Sources such as the transmission_line and voltage_source should be specified in a one

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Understanding the transmission line

Hi Hideaki, Sources such as the transmission_line and voltage_source should be specified in a one

Mar 14

Mar 13

Place a oblique plate model

Hello, I want to place the #plate in a direction that is at an angle to the xoz plane, rather than

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Place a oblique plate model

Hello, I want to place the #plate in a direction that is at an angle to the xoz plane, rather than

Mar 13

Ahmed sayed sayed Madbouly

Mar 9

error while run the code

every time I am trying to run setup.py built I get this error: error: Microsoft Visual C++ 14.0 or

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error while run the code

every time I am trying to run setup.py built I get this error: error: Microsoft Visual C++ 14.0 or

Mar 9

Léa Mercier, Craig Warren4

Mar 4

Soil peplinksi on devel version in python

Hi Lea, Your use of the API function for the Peplinski soil model is wrong, see the devel docs -

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Soil peplinksi on devel version in python

Hi Lea, Your use of the API function for the Peplinski soil model is wrong, see the devel docs -

Mar 4

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