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Aug 9

gprMax user support is moving to GitHub Discussions — this group is now closed

Dear all, After many years, we are retiring this Google Group as the primary support forum for gprMax

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gprMax user support is moving to GitHub Discussions — this group is now closed

Dear all, After many years, we are retiring this Google Group as the primary support forum for gprMax

Aug 9

Craig Warren, … Craig Warren7

3/29/19

Tool to convert PNG images to HDF5

Hi Dongyang, The size, ie pixel dimensions, of the image when multiplied by the spatial resolution

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Tool to convert PNG images to HDF5

Hi Dongyang, The size, ie pixel dimensions, of the image when multiplied by the spatial resolution

3/29/19

Craig Warren, qwyuan3

1/2/18

How to best use this forum

qwyuan, Please repost your question in a separate thread. Kind regards, Craig

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How to best use this forum

qwyuan, Please repost your question in a separate thread. Kind regards, Craig

1/2/18

xiang li, Antonis Giannopoulos2

May 27

CUDA GPU acceleration fails with large number of materials

This is a limitation that requires reprogramming the GPU kernels and how they handle update

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CUDA GPU acceleration fails with large number of materials

This is a limitation that requires reprogramming the GPU kernels and how they handle update

May 27

May 6

Installation issue: InvalidArchiveError with jupyterlab_widgets & A-scan warning

Dear gprMax community, I am writing to share an issue I encountered while setting up the gprMax

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Installation issue: InvalidArchiveError with jupyterlab_widgets & A-scan warning

Dear gprMax community, I am writing to share an issue I encountered while setting up the gprMax

May 6

Mehul Bagaria, Perpolita2

Apr 14

Guidance needed on using #geometry_objects_read with HDF5 geometry

Hi, I'll try to help as much as I can. I personnaly use the #geometry_objects_read feature with

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Guidance needed on using #geometry_objects_read with HDF5 geometry

Hi, I'll try to help as much as I can. I personnaly use the #geometry_objects_read feature with

Apr 14

Feb 6

Suitable versions for the GPU Modelling

Solved. 29 Ocak 2026 Perşembe tarihinde saat 13:41:37 UTC+3 itibarıyla Görkem Baş şunları yazdı: I

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Suitable versions for the GPU Modelling

Solved. 29 Ocak 2026 Perşembe tarihinde saat 13:41:37 UTC+3 itibarıyla Görkem Baş şunları yazdı: I

Feb 6

Noushin Khosravi Largani, Antonis Giannopoulos2

Feb 4

Antenna Leakage in gprMax Simulations

The simulation starts at time zero and all fields in the simulation domain are available from that

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Antenna Leakage in gprMax Simulations

The simulation starts at time zero and all fields in the simulation domain are available from that

Feb 4

王辰宇, Görkem Baş2

Jan 26

CompileError( pycuda.driver.CompileError: nvcc preprocessing of C:\Users\25244\AppData\Local\Temp\tmpgvjck3sh.cu failed

Hi, Were you able to solve this problem? If so, what steps did you take? Can you help me? 3 Mart 2025

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CompileError( pycuda.driver.CompileError: nvcc preprocessing of C:\Users\25244\AppData\Local\Temp\tmpgvjck3sh.cu failed

Hi, Were you able to solve this problem? If so, what steps did you take? Can you help me? 3 Mart 2025

Jan 26

Manar Bakr, … Samuel Hailemariam4

Jan 16

Guidance needed for realistic buried pipe simulations using gprMax

http://dx.doi.org/10.7488/era/1466 On Wednesday, January 7, 2026 at 3:44:21 AM UTC-8 iitr....@gmail.

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Guidance needed for realistic buried pipe simulations using gprMax

http://dx.doi.org/10.7488/era/1466 On Wednesday, January 7, 2026 at 3:44:21 AM UTC-8 iitr....@gmail.

Jan 16

אופק פרסלר, Antonis Giannopoulos2

12/11/25

changing the yee cell sizes in my scan changed the reults of the scan in an unexpected way??

The result is not weird. It is what is expected. The waveform command specifies the current (I) in

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changing the yee cell sizes in my scan changed the reults of the scan in an unexpected way??

The result is not weird. It is what is expected. The waveform command specifies the current (I) in

12/11/25

Christan Pigot, Craig Warren3

12/9/25

Craig, Thank you for your answer As expected you already explored this field. thank you for the

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Craig, Thank you for your answer As expected you already explored this field. thank you for the

12/9/25

Eunice Oliveira

12/2/25

Simplify Your gprMax Simulations with Inductiva

Dear gprMax community, If you are running large-scale gprMax simulations or dealing with compute-

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Simplify Your gprMax Simulations with Inductiva

Dear gprMax community, If you are running large-scale gprMax simulations or dealing with compute-

12/2/25

11/28/25

Podcast: gprMax foundation and simulation in 29 minutes

Dear all, I hope you are well. I made this video using official GPRMax guidelines and AI. It is a

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Podcast: gprMax foundation and simulation in 29 minutes

Dear all, I hope you are well. I made this video using official GPRMax guidelines and AI. It is a

11/28/25

Alvaro Jeria Estudiante Doctorado

11/26/25

Synthetic modelling of railway trackbed to generate synthetic radargrams with GprMax

Hi to all, Im currently researching about the use of synthetic models. If anybody interested please

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Synthetic modelling of railway trackbed to generate synthetic radargrams with GprMax

Hi to all, Im currently researching about the use of synthetic models. If anybody interested please

11/26/25

Dominik Rhiem, Craig Warren2

11/21/25

2D energy distribution

Hi Dominik, gprMax simulates full wave propagation. There will be different geometric spreading (and

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2D energy distribution

Hi Dominik, gprMax simulates full wave propagation. There will be different geometric spreading (and

11/21/25

Julina Hilgenberg, Craig Warren2

11/21/25

FDTDImpulse - discrepancy between gprMax v.3.1.5 and v.3.1.7

Hi Julina, Thanks for the observation. I suspect you are correct and the small change in behaviour of

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FDTDImpulse - discrepancy between gprMax v.3.1.5 and v.3.1.7

Hi Julina, Thanks for the observation. I suspect you are correct and the small change in behaviour of

11/21/25

ccc ccc, Craig Warren2

11/21/25

BP imaging in MATLAB with B - scan matrix

I assume this is some form of back propagation/reverse time migration you are talking about? Kind

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BP imaging in MATLAB with B - scan matrix

I assume this is some form of back propagation/reverse time migration you are talking about? Kind

11/21/25

Juan Carlos Araujo Cabarcas, Craig Warren2

11/21/25

Challenges using gprMax for space weather research

Super interesting work. Was good to catchup with you and your team about this. Kind regards, Craig On

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Challenges using gprMax for space weather research

Super interesting work. Was good to catchup with you and your team about this. Kind regards, Craig On

11/21/25

杨天宏, Craig Warren2

11/21/25

Performance Optimization and MALA_1200 and GSSI_1500 Compatibility in gprMax v3.1.7

Hi Yang, In answer to 1, the size of your model (number of cells) and number of time-steps should be

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Performance Optimization and MALA_1200 and GSSI_1500 Compatibility in gprMax v3.1.7

Hi Yang, In answer to 1, the size of your model (number of cells) and number of time-steps should be

11/21/25

Kwadwo Nyameadom Asare, Craig Warren2

11/21/25

Development of FDTD Antenna Model.

Its unlikely that you can just change the excitation frequency of the 1.2GHz MALA antenna model to

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Development of FDTD Antenna Model.

Its unlikely that you can just change the excitation frequency of the 1.2GHz MALA antenna model to

11/21/25

Kwadwo Nyameadom Asare, Craig Warren2

11/21/25

Availability of Cloud-Based Platforms or Servers for gprMax simulations

gprMax can be, and has been, run on cloud-based platforms. The setup is generally the same. Kind

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Availability of Cloud-Based Platforms or Servers for gprMax simulations

gprMax can be, and has been, run on cloud-based platforms. The setup is generally the same. Kind

11/21/25

MOLOY DAS, Craig Warren2

11/21/25

GPU parameters for gprMax simulation

See my answer to your previous GPU question on what the main performance factors on GPU for gprMax

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GPU parameters for gprMax simulation

See my answer to your previous GPU question on what the main performance factors on GPU for gprMax

11/21/25

MOLOY DAS, Craig Warren2

11/21/25

Regarding GPU requirement for large domain and improved simulation time

Thank you. You are partially correct, the amount of RAM per GPU governs the size of model you can run

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Regarding GPU requirement for large domain and improved simulation time

Thank you. You are partially correct, the amount of RAM per GPU governs the size of model you can run

11/21/25

MOLOY DAS, Craig Warren2

11/21/25

Request to provide input about 3D model construction

Thank you, but no I'm afraid we are not able to guide people step-by-step. We simply don't

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Request to provide input about 3D model construction

Thank you, but no I'm afraid we are not able to guide people step-by-step. We simply don't

11/21/25

Santhu Athidi, … MOLOY DAS4

10/9/25

Examples on landmine models-regarding

Hello all, I've modelled a scaled replica of the Adrushya (Mine II) in gprMax and simulated it

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Examples on landmine models-regarding

Hello all, I've modelled a scaled replica of the Adrushya (Mine II) in gprMax and simulated it

10/9/25

farhad physic, Christan Pigot2

9/28/25

Geometry view warning in example model

Dear Fahrad The geometry_view is commented Add # in front of the line: #geometry_view: 0 0 0 0.480

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Geometry view warning in example model

Dear Fahrad The geometry_view is commented Add # in front of the line: #geometry_view: 0 0 0 0.480

9/28/25

xiang li, Antonis Giannopoulos3

6/9/25

Inquiry about Importing a Spatially Varying Permittivity Field into gprMax

Dear Professor Giannopoulos, Thank you very much for your detailed and helpful reply. I truly

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Inquiry about Importing a Spatially Varying Permittivity Field into gprMax

Dear Professor Giannopoulos, Thank you very much for your detailed and helpful reply. I truly

6/9/25

ᄋᄀᄋ, Antonis Giannopoulos2

5/25/25

I want to know the error

Your source is inside the x-directed PML absorbing region. You have 10 cells of a PML in your model

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I want to know the error

Your source is inside the x-directed PML absorbing region. You have 10 cells of a PML in your model

5/25/25

Kwadwo Nyameadom Asare, Zohaib Akbar Khan2

5/10/25

Extraction of permittivity maps

Hello, YOu can extract the permitivty map by creating the .h5 file in simulation using #

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Extraction of permittivity maps

Hello, YOu can extract the permitivty map by creating the .h5 file in simulation using #

5/10/25

Hamed Ghorbani, Antonis Giannopoulos4

4/30/25

2D hertzian dipole Implementation in GPRMax

Hi Hamed, 1. The sources.py in the current master branch contains the implementation of the various

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2D hertzian dipole Implementation in GPRMax

Hi Hamed, 1. The sources.py in the current master branch contains the implementation of the various

4/30/25

longxiang yao, … Antonis Giannopoulos3

4/28/25

How to solve the polarization problem

Your source is on the dielectric interface and it will be better if it is a few cells further up. In

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How to solve the polarization problem

Your source is on the dielectric interface and it will be better if it is a few cells further up. In

4/28/25

王晨, … liu ft9

4/23/25

I would like to know where the issue lies. I have uploaded my .in file and B-SCAN. Could you please assist me?Why is there a blurred concave region in the B-SCAN

Thank you for your reply! I have another question. When I set the transmitted wave in the x-direction

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I would like to know where the issue lies. I have uploaded my .in file and B-SCAN. Could you please assist me?Why is there a blurred concave region in the B-SCAN

Thank you for your reply! I have another question. When I set the transmitted wave in the x-direction

4/23/25

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