July 2020 News
Augmentation of EM Simulation algorithms for the effects of Magnetization for Inductive and Grounded Sources
There are three mechanisms by which magnetization in bodies effect the EM response. The first is often called the magnetostatic effect. This is the effect of induced magnetization caused by the magnetic field from the source. This is commonly seen, for example, at low frequency in the inphase component of FDEM data but the effects become more complicated at higher frequency. It is also often seen in the on-time channels of TDEM data but of course also can affect the off time data. The second effect can be termed the magnetic effect in current channeling. These effects can be seen theoretically in the complex wavenumber particularly at lower frequencies as the real part of the complex wavenumber contains the term (σµ). Thus, as an example, in conductive environments the contrast in susceptibility causes a current channeling effect (often called galvanic effects as they mimic DC resistivity). The third effect is the effect on the inductive response of a conducting body as the magnetic field in the body is now augmented by the susceptibility.
Thus, there is a need to simulate (forward model) the effects of contrast between host and anomaly, not just the conductivity and permittivity but the magnetic susceptibility. We have augmented our algorithms to compute the first and second effect mentioned above allowing the 3D objects (prisms and polyhedras) as well as the background layered field to have susceptibility different from freespace.
Augmentation of Processing and Filtering Algorithms
Digital Fourier Transforms
Fast Fourier Transforms have long been used in geophysics. However, they lack the accuracy and precision of DFT's and with modern computing techniques there is no longer the need to use the quick, approximate FFT techniques. We have enhanced our DFT tools (spectral analyses and decomposition as well as filters) to provide extremely highly accurate computations in both amplitude and phase. And, we now can handle extremely long time series as the algorithms are multi-processed.
Processing of towed multi-sensor magnetometers
These enhancements pertain to both total field as well as component sensors such as fluxgates. Our compensation algorithms have been enhanced in quite a few areas. First, we enhanced the algorithms to deal with component data and second, to compensate gradient data. Often as it happens it is much better to first calculate the gradients and then to compensate these gradients rather that the processing in the opposite order. These gradient enhancements are also for component data. Other enhancements in magnetic data processing are the de-rotation of component data where the components of the magnetic field or the components of gradient data.
TDEM Inversion
Our inversions for TDEM still pertain to 1D models. However, we have enhanced the capability and accuracy of our Multi-Component, Multi-Station inversion for both our overparametrized, smooth inversion (Occam) as well as our underparametrized Trust Region technique. The latter technique is not a linear technique as the inversion algorithm does not stop at the stage of using the Jacobian. These tools are very useful in reducing the non-uniqueness issues in TDEM inversion.
CSEM Processing, Modeling and Inversion
We continue our work in land based CSEM to provide a comprehensive set of tools to allow proper processing and interpretation of geophysical surveys with a grounded transmitter utilizing both magnetic and electric measurements. This includes proper processing and interpretation of so-called CSAMT.
We continue to advance the processing of raw time series to produce the required impulse responses in the frequency domain for two component electric field measurements and three component magnetic field measurements.
With these processing capabilities linked to our forward modeling and inversion routines, you may now collect, process and interpret such data without the need for large spatial offsets in the transmitter and receiver.
This, of course, has many benefits both in cost and operational activities. There is now no need for huge, heavy and expensive transmitters. Very long transmitters with very large distances to the receivers are now no longer necessary. Interpretation is now much more straightforward as you no longer have to concern yourself with such things as: a) being in the far field b) transmitter response at the transmitter site and c) response of the intermediate region between transmitter and receiver.
With this new processing, you will now be ready to utilize our ground breaking 3D inversion allowing for: a) multiple transmitters b) multi-component magnetic and electric measurements without the need to contract to an impedance c) scalar or vector measurements d) many receivers on multiple lines ( profiles). The inversion is multi-core and utilizes array processing techniques and new techniques in inversion. Actually, not new but we have gone back to the fundamentals and play no tricks in the inversion process.
Archive
| Title | Date | Summary |
| June 2024 News | 20 Jun 2024 | EMIGMA V11 released. New 3D thin-sheet plate inversion with integrated layered background. Improvements and extensions to all the 3D Inversion applications. Accuracy improvements to both inductive and galvanic 3D simulation algorithms. Updates to online HELP, and more. (full article) |
| Dec 2024 News | 4 Dec 2024 | Learn about developments dealing with inductive thin-sheet inversion, 3D earth models from a ground current source(CSEM) and more. (full article) |
| March 2023 News | 15 Mar 2023 | We are proud to announce the release of EMIGMA V10.1 geophysics software. Many improvements have been made to its various modules. |
| July 2022 - EMIGMA V10 and QCTool V5.0.0 | 25 Jul 2022 | Details of QCTool upgrades may be found on the QCTool website qctool.ca. More than 2 years of development have gone into the upgrades in EMIGMA V10 (full article) |
| July 2020 News | 8 Jul 2020 | Many EM simulation, processing and filtering algorithms have been augmented in our EMIGMA geophysics software. (full article) |
| March 2020 - EMIGMA V9.5.5 now available | 11 Mar 2020 | We are pleased to announce that a new version of our EMIGMA geophysics software has been released. It includes many additions to the inversion, simulation and visualization tools. |
| Oct 2019 - 3D Resistivity Inversion | 15 Oct 2019 | We have completed an extensive upgrade to the 3D resistivity inversion in our geophysics software to allow both surface to borehole and borehole to borehole data. (full article) |
| June 2019 - QCTool new features | 12 Jun 2019 | Many new features have been recently added to our QCTool software that will aid in processing geophysics data. (full article) |
| Jan 2019 - Magnetic Compensation | 22 Apr 2019 | We have released a new version of our aeromagnetic processing and magnetic compensation geophysics software. The new version is suitable for airborne, ground and marine surveys. (full article) |
| Oct 2017– CSEM and V9.5 release | 6 Oct 2017 | We are pleased to announce the release of V9.5 of our geophysics software effective October 5, 2017. This past year, we have enabled the use of Land Based CSEM survey interpretation. (full article) |
| Oct 2016 - Release of Version 9.1 | 25 Oct 2016 | While there are many minor improvements and additions to this version of our geophysics software, we wish to touch on only IP modeling, TDEM inversion and the inversion viewer. (full article) |
| July 2016 - Land Based CSEM | 27 Jul 2016 | Our geophysics software now supports land based CSEM including data processing, editing , plotting, gridding, modeling (synthetic data) and 1D and 3D inversion. (full article) |
| June 2016 – Extensions to 1D TDEM inversion capabilities | 21 Jun 2016 | We have added a large number of new functionalities to our 1D TEM inversion tools including simultaneous inversion of data from different base frequencies (full article) |
| May 2016 - New Simulation Capabilities | 11 May 2016 | Inductive Plate Algorithm - FAST! We have implemented a new compiler and other engineering aspects. The result is up to 50 times increased speed of computation! (full article) |
| CGG Airborne Systems | 9 Jan 2016 | Support for CGG 100% normalized step response data has been implemented and is released in today's updates. (full article) |
| Holiday prices | 15 Dec 2015 | Holiday pricing is now available for some licenses until Jan 1,2016. See the prices page for details. |
| Oct 2015 – EMIGMA V9.0 release | 27 Oct 2015 | We are pleased to announce a dramatically new version of the EMIGMA geophysics software. Changes include upgrades to computation speeds and accuracy and network dongle capability. (full article) |
| May 2015 - EMIGMA developments | 14 May 2015 | Some exciting features added to EMIGMA include new imports, better geophysical data and error handling, as well as powerful modeling, inversion and mapping. (full article) |
| July 2014 - New EMIGMA Developments | 25 Jul 2014 | With the introduction of new ground FEM systems, we have upgraded our tools for the newer systems particularly PROMIS, DualEM and GEM2. (full article) |
| July 2014 - Expansion of MT Tools | 24 Jul 2014 | Last year, we completed major upgrades to our MT licenses but the growing popularity for these products is encouraging further additions. (full article) |
| April 2014 - New IP/Resistivity Developments | 22 Jul 2014 | This year, we have released major upgrades to our Resistivity and IP licenses. We believe that EMIGMA is now the most comprehensive software package for such data. (full article) |
| Sept 2013 News | 17 Sep 2013 | We have worked on our geophysics software to make the user interfaces more user-friendly. There has also been a strong focus on data import capabilities. (full article) |
| June 2012 News | 22 Jun 2012 | Our geophysics software tools have undergone quite a few developments in the area of processing and visualization of magnetotelluric and CSAMT data. (full article) |
| March 2012 News | 9 Mar 2012 | We are excited to present to you some of the many new features have been added to our geophysics products including enhancements to EMIGMA's 3D inversion (full article) |
| 3D CAD Import/Exports | 31 Oct 2011 | We have augmented our geophysics software tools for interacting with 3D CAD applications. (full article) |
| QCTool Version 2.3 released | 27 Sep 2011 | This new version of our software has been recompiled and optimized for Windows Vista and Windows 7 among other new features. (full article) |
| Sept 2011 News | 1 Sep 2011 | Our EMIGMA geophysics software has had many improvements over the last several months including enhancements to tem and mag inversion as well as 3d resistivity modeling. (full article) |
| July 2011 - New MMR tools and license | 6 Jul 2011 | New simulation algorithms have been developed in our geophysics software for ground and borehole MMR surveys. The MMR license also includes borehole DC magnetic geophysical modeling. (full article) |
| EMIGMA 8.6 is now available | 24 Jun 2011 | Licensed users with an up to date maintenance may download the latest release of our geophysics software here. |
| March 2011 News | 4 Mar 2011 | There have been some notable additions to EMIGMA during the fall of 2010 and early winter 2011. (full article) |
| EMIGMA V8.5 has been released | 29 Jul 2010 | We are pleased to announce the immediate release of version 8.5 of EMIGMA. EMIGMA users with a license currently under maintenance are eligible for a free upgrade to this latest version. (full article) |
| What's new in EMIGMA | 28 Jan 2010 | Many new features were included in EMIGMA during the fall of 2009 (full article) |
| New features in EMIGMA and QCTool | 8 Jul 2009 | Many new capabilities have been added to our products including the support of additional import formats as well as enhanced simulation algorithms. (full article) |
| Time Domain Inversion | 6 Jul 2009 | While EMIGMA has contained one-dimensional inversion for TEM for a few years now, we have recently released two significantly enhanced versions. (full article) |
| Updated Demo Databases | 17 Apr 2009 | The demo databases available in the downloads area of this website have received some substantial modifications. (full article) |
| New TDEM Demo Database | 25 Mar 2009 | A new demo database exclusively containing time domain data for ground and borehole surveys is available. (full article) |
| QCTool Price Increase | 5 Mar 2009 | As of April 1, 2009, the price for QCTool will be $200 CAD. |
| Download GeoTutor IV | 20 Feb 2009 | GeoTutor IV is now available for download from our website. (full article) |
| Magnetic Compensation Plug-In | 16 Jan 2009 | We now offer a plug-in for Geosoft Oasis to perform magnetic compensation on aeromagnetic data contained within your .gdb files. (full article) |
| EMIGMA video now available | 2 Dec 2008 | A training video demonstrating the power of EMIGMA can now be downloaded for free from the Downloads section of our website. (full article) |
| New Modeling Capabilities | 10 Nov 2008 | We now offer forward modeling capabilities for MTEM and CSEM as well as for airborne MT applications such as ZTEM. (full article) |
| New terraTEM import and functionality added | 26 Jun 2008 | EMIGMA now has the ability to import data generated by the terraTEM instrument. (full article) |
| GeoTutor IV is now available | 11 Jun 2008 | We are proud to announce the immediate release of GeoTutor IV. This new version introduces the ability to register online using a customized serial number in the same way as Petros Eikon's QCTool. (full article) |
| EMIGMA V8.1 is now available | 28 Apr 2008 | We are happy to announce the immediate release of EMIGMA V8.1, which brings with it complete compatibility with Windows Vista as well as a number of new capabilities and improvements. (full article) |
| Buy Our Software Online | 11 Feb 2008 | Recently added to our Price page is the ability to securely purchase various PetRos EiKon products online using PayPal. (full article) |
| EMIGMA V8.1 Coming Soon | 4 Feb 2008 | We are very pleased to announce the upcoming release of EMIGMA 8.1 on March 31. This will be the first EMIGMA product to be compatible with Windows Vista. (full article) |
| Improved TEM Inversion | 3 Jan 2008 | While EMIGMA has contained one-dimensional inversion for TEM for a few years now, we have recently released a dramatically enhanced version. (full article) |
| TEM-FAST added to EMIGMA | 7 Dec 2007 | Petros Eikon has enhanced one of its flagship products with TEM-FAST electromagnetic geophysical data capabilities. (full article) |
| PetRos EiKon Services | 21 Nov 2007 | We have many geophysical services that can conform to your needs. Our experience extends to data in the areas of electromagnetics, magnetics and gravity. (full article) |
| QCTool V2.2 Now Available | 9 Nov 2007 | Visit our downloads area to obtain QCTool so you can experience this latest version first hand. (full article) |
| EMIGMA V7.8 - New Features | 20 Aug 2007 | Now in its third major release, EMIGMA V7.8 has an unequaled array of functions and now provides virtually all of your processing, modeling and inversion requirements for EM, Magnetics, Gravity, IP and Resistivity (full article) |
| New release of QCTool (August, 2007) | 20 Aug 2007 | New release of QCTool 2.1(August, 2007). (full article) |
| EMIGMA Update | 1 Aug 2007 | Users with an active maintenance contract can now download a new EMIGMA update for July 27. |
| Purchase QCTool via PayPal | 23 Jun 2006 | You can now purchase a QCTool license online via PayPal. You can use either a credit card or, if you live in USA or Canada, your bank account. |
| PetrosSuite Teaching & Research Software | 31 May 2006 | PetrosSuite - a new Teaching & Research software bundle for Academics. (full article) |
| New Data Processing and Interpretation Services | 31 May 2006 | New Interpretaton and Processing Services now available. (full article) |
| Aeromagnetic Compensaton now available in QCTool | 31 May 2006 | Aeromagnetic Compensation now available in QCTool (May, 2006) (full article) |
| Two New Technical Papers | 30 May 2006 | Dr. Cheng studies the 3D airborne TEM modeling capabilities of EMIGMA and other available programs. In the second by Prof. Duckworth, he discusses among other things comparisons between EMIGMA's modeling results and his own scale model results. (full article) |
| Live Chat and Support | 8 May 2006 | You can now talk to us live during our work hours (9:30am-7:30pm EST/EDT). Feel free to ask us any questions you may have, but please be patient. It may take a while for someone to answer. To use the chat system, choose a nickname and click "Login". If the nickname you chose is not available, you can set a new one with "/nick newname" (without the quotes) or just reload the page and retry. |
| New release of EMIGMA V7.8 now available | 30 May 2005 | New release of EMIGMA V7.8 (December, 2005) now available (full article) |
| May 2005 News | 30 May 2005 | Conductivity Depth Imaging now available in EMIGMA V7.8. |
| May 2005 News | 30 May 2005 | New Impulse to Step Processing now available in EMIGMA V7.8. |
| May 2005 News | 30 May 2005 | QCTool now available for Scintrex CG5. |
| May 2005 News | 30 May 2005 | Imports, Modelling, Inversion, CDI's available for VTEM and AeroTeM systems. |
| May 2002 News | 1 May 2002 | Introducing EMIGMA V7.5 (full article) |
| February 2001 News | 1 Feb 2001 | EMIGMA Version 7 Release (full article) |
| July 2000 News | 1 Jul 2000 | EMIGMA V7.0 Ready for Beta Testing (full article) |
| December 1998 News | 1 Dec 1998 | EMIGMA V6.2 at a Glance (full article) |
| February 1998 News | 1 Feb 1998 | New EMIGMA V6.1 Release Now Available (full article) |
| April 1997 News | 1 Apr 1997 | 3D Data Representation and Multiple Plates Now Available (full article) |
| September 1996 News | 1 Sep 1996 | Focus: Improved Induction (full article) |
| February 1996 News | 1 Feb 1996 | Sneak Preview into EMIGMA Version 5 (full article) |
| August 1995 News | 1 Aug 1995 | 3D Resistivity/IP Surveys With EMIGMA Version 4 (full article) |
| July 1995 News | 1 Jul 1995 | EMIGMA Version 3 (full article) |
| October 1994 News | 1 Oct 1994 | New EMIGMA Development (full article) |
| August 1994 News | 1 Aug 1994 | VH Plate Development (full article) |
| July 1994 News | 1 Jul 1994 | MITEC Project (full article) |