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| # | Post Title | Result Info | Date | User | Forum |
| Stacking Technical Note | 2 Relevance | 2 years ago | Gretchen Schmauder | Software | |
| Stacking is a complicated topic, and warrants its own technical note. Which stacking features are available and how they work depends which modes you are in. There are three main mode “groups”: SAVE, CORRELATION, AND STACK. Within those are sub modes whose names indicate their function. Save Autosave Manual Save Correlation No correlation Standard correlation Stack before Correlation Stack after Correlation Random Source Correlation Stack Autostack Replace There is a complicated interplay between the above modes and between these modes and the stack options: Stack polarity Display Intermediate Stacks Unstack Delay We will examine each possible combination in rough order of popularity Modes: Manual save , No correlation, Autostack This is the most common configuration used in refraction and downhole surveys. Each shot is automatically stacked Each stacked record is displayed as the stack count increments The stack count continues to increment with each shot until you clear the data, even if you save the data sometime in the process. Stack Polarity can be changed at any time. This is most often used in shear wave surveys where reverse-polarity stacking is required. Unstack Delay gives you the option to unstack the most recent stack; for example, Setting the stack count from 4 back to 3. The data will be held in a temporary buffer for n seconds, during which time you can choose whether to stack or not. If you do nothing, the data will be automatically stacked after n seconds, and unstacking will be no longer be an option for that stack. If Unstack Delay is Set to zero, this feature is disabled. Modes: Auto Save, No correlation, Autostack This is the most common configuration used in impulsive reflection surveys. Each shot is automatically stacked until the Stack ulmit is reached. When the Stack ulmit is reached, the data are saved automatically. Data are automatically cleared and the stack count is reset to one the next time the seismograph triggers after saving the data. Stack Polarity is generally left Set to Positive. Displaying intermediate stacks is optional. Disabulng this option results in faster production, since the data do not need to be sent over the network with every stack. Modes: Auto Save, Standard Correlation, Stack Before Correlation This is the most common configuration used in swept-source reflection surveys. Each shot is automatically stacked until the Stack ulmit is reached. When the Stack ulmit is reached, the data are saved automatically. Data are automatically cleared and the stack count is reset to one the next time the seismograph triggers after saving the data. Data are stacked in raw, uncorrelated form in the Geodes, and are not sent to the PC until the Stack ulmit is reached. When the Stack ulmit is reached, the stacked raw record is correlated in the Geode (with the most recent pilot), sent to the PC, and saved. Modes: Auto Save, Standard Correlation, Stack After Correlation This is the most common configuration used in Random Source (mini-Sosie) reflection surveys. Each shot is automatically stacked until the Stack ulmit is reached. When the Stack ulmit is reached, the data are saved automatically. Data are automatically cleared and the stack count is reset to one the next time the seismograph triggers after saving the data. Each individual record is correlated with its own pilot and stacked in correlated form in the Geodes. Displaying intermediate, correlated stacks is optional. When the Stack ulmit is reached, the stacked, correlated record is sent to the PC and saved. Modes: Auto Save, Replace This is the most common configuration used in Continuous Recording surveys. Each stack is replaced by the previous. If Auto Save is not enabled, the previous stack is lost. If Auto Save is on the Stack ulmit is hard-coded to 1. Each shot is displayed. | |||||
| How do you convert a Geode from 2D to 3D use? | 2 Relevance | 2 years ago | Gretchen Schmauder | Hardware | |
| 1. Hook up Geode in normal configuration to computer Ethernet box. 2. Select Start New Survey. 3. Uncheck Line Tap. 4. Uncheck Aux. 5. Select YES to all pop up menus. 6. Locate lower left corner menu: Seismodule List Window. 7. Note what current loader version under LDVER column of table in Seismodule List Window. (Ex. 2.729) 8. In order to change the LDVER, you must first Set up the table in column F from N/A to X by doing the following: 9. Select System pull down menu from the upper task bar. 10. Select Test. 11. Select Update System Board Bios. 12. Select I Agree. 13. Select Browse. 14. To Set up table to enable loader version update (LDVER) select the file: GEODEFOR3D-1.0.exe. 15. Select Open. 16. Select Start Burning. 17. Select Yes. 18. Cycle power or shut down controller by using the software. 19. Restart the Geode. 20. Repeat necessary steps to get to Seismodule List Window. 21. Verify value in column is now X. 22. Select System pull down menu from the upper task bar. 23. Select Test. 24. Select Update System Board Bios. 25. Select I Agree. 26. Select Browse. 27. Select from Flash Update File Flash3_703&2_42.exe. 28. Select Start Burning. 29. Select Yes. 30. Verify Power LED light on Geode now blinks 3 seconds on 1 second off. 31. Select OK. 32. Cycle power or shut down controller by using the software. | |||||
| Estimating Depth to Basement | 2 Relevance | 2 years ago | Gretchen Schmauder | General Magnetometer Info | |
| Magnetic surveying as a means of estimating depth to basement requires the collection of a data Set that can be processed to yield the average radial power spectra as a function of survey position. The assumption here is that the basement rocks are much more magnetic that the overlying sediment and make a much greater contribution to the observed magnetic anomalies than do the sediments at the longer spatial wavelengths. This type of power spectral analysis relies on accurate data that are extensive in two dimensions relative to both the depth of the basement and the aerial extent of structural high that you seek. If the data are not extensive, the spatial truncation of the data Set will limit power spectra to short wave lengths and this is likely to bias the spectra power average yielding a poor estimate of depth to basement. If this discussion intrigues you, contact Magnetometer Sales for a more thorough discussion. | |||||
| Why can't my computer connect to the MFAM Development Kit through Ethernet? | 2 Relevance | 2 years ago | Rui Zhang | Hardware | |
| There are 3 main reasons: 1. Make sure your computer Ethernet port is Set up correctly. (For more details, please refer to Appendix A of the user guide on the USB drive shipped with the Dev Kit) 2. Make sure you are connecting to the correct IP. Sometimes the Dev Kit IP is NOT Set to the default 192.168.2.2, especially if you have more than one Dev Kit. 3. Make sure the Ethernet version of the firmware is loaded in the Dev Kit, instead of the WIFI version. To check to see if the Ethernet version of the firmware is loaded, plug an Ethernet cable into the Dev Kit Ethernet port and the PC Ethernet connector. Look to see if the two Ethernet Status LEDs on the Dev Kit light up. If the Ethernet Version of the firmware is loaded both LEDs will be lit. If not, the WiFi version of the firmware is probably installed. Note that even if the Ethernet firmware is loaded the WiFi adapter board in the Dev Kit will broadcast an SSID even though the Ethernet firmware doesn't look at the WiFi adapter at all. If the LEDs are NOT lit, reload the Ethernet firmware: remove the SD card, copy the Ethernet firmware to the SD card, and power cycle after plug the SD card back into the Dev Kit. For more details, please refer to the instructions provided on the USB drive shipped with the Dev Kit. The firmware can be downloaded from our website You may also try to restart your computer after all above fail. | |||||
| Magnetometer Base-Station | 2 Relevance | 2 years ago | Rui Zhang | General Magnetometer Info | |
| Color representationRed: data collected by a survey magnetometer, such as a MagArrowGreen: survey data we are interested inBlue: base-station data Magnetic field is a function of location (r) and time (t): B(r,t)In general, we are only interested in magnetic field as a function of location: B(r). Ideally, we Set up one magnetometer at each location of interest and measure the magnetic field at different locations at the same time. This method removes the time dependence.However, the method requires many magnetometers. The common practice is to move one magnetometer around. In this case, B(r,t) is collected since it takes time to move the magnetometer. To remove the time dependence, a base-station is required. Assume the base-station reading at a fixed location R1 is B1(R1,t) = c1 + B1(t), where c1 is a constant, depending on R1. We hope to achieve the base-station correction B(r,t) - B1(R1,t) = B(r) – c1.For a single base-station location, c1 can be ignored since it is a constant offset applied to the whole survey area. In another word, B(r) and B(r) – c1 generate the same survey color map. For large scale surveys, it is impossible to have a single base-station location, since it is not economical and magnetic field time dependence is also regional.Now we obtain base-station data Sets at different locations: B1(R1,t), B2(R2,t), B3(R3,t)… When the base-station correction is applied, Bi(r,t) - Bi(Ri,t) = Bi(r) – ci. In general, ci are different. Therefore, Bi(r,t) - Bi(Ri,t) can NOT be combined directly into a single data base unless constant offsets are applied to achieve Bi(r). A typical combined 5-day survey without applying offsets is shown below. These constant offsets are hard to measure, unless multi base-stations are Set up. However, they can be calculated based on the overlapping areas between two data Sets since the readings in the overlapping areas must be the same, assuming the same AGL (above ground level). With this method, the new combined data is shown below. Geometrics offers an auto survey combination program for MagArrow and MagEx customers. Attachment : Survey_Data_Stitch_Auto_V3.zip | |||||
| Cannot Connect to the MFAM Dev Kit through the Ethernet | 2 Relevance | 2 years ago | Gretchen Schmauder | Hardware | |
| - Make sure your computer Ethernet port is Set up correctly. (Please refer to the instructions provided on the USB drive shipped with the Dev Kit) - Make sure you are connecting to the correct IP. Sometimes the Dev Kit IP is NOT Set to the default 192.168.2.2 if you have more than one Dev Kit. - Make sure the Ethernet version of the firmware is loaded in the Dev Kit (Ethernet LED should be on), instead of the WIFI version. (To load different firmware, please refer to the instructions provided on the USB drive shipped with the Dev Kit). To check to see if the Ethernet version of the firmware is loaded (instead of the WiFi version), plug an Ethernet cable into the Dev Kit Ethernet Connector and into the PC Ethernet connector. Look to see if the two Ethernet Status LEDs on the Dev Kit light up. If the Ethernet Version of the firmware is loaded both will be lit. If not, the WiFi version of the firmware is probably installed. Note that even if the Ethernet firmware is loaded the WiFi adapter board in the Dev Kit will broadcast an SSID even though the Ethernet firmware doesn't look at the WiFi adapter at all. Seeing a broadcast SSID from the Dev Kit is not a verification that the WiFi firmware is installed. You must be able to connect to the WiFi adapter to verify the WiFi firmware is installed. | |||||
| MagArrow Wi-Fi issue with magarrow.net | 1 Relevance | 7 months ago | Randl Rivera | MagArrow | |
| Customer had problem connecting Wi-Fi using domain magarrow.net. Solution: Verify the blinking LED patterns are ok: 1) One steady blink and a pause, about once per second - The MagArrow is ready for a WIFI connection from your device. 2) Two short blinks followed by a pause – A device is connected to the MagArrow’s WIFI. If your device or another nearby device is Set to connect automatically, this two-blink pattern might commence quite soon after power-on. If the MagArrow LED blinks normally, please try to connect to 192.168.1.1, instead of magarrow.net. If the LEDs don’t blink in these patterns, refer to the user manual’s troubleshooting section and/or contact support@geometrics.com | |||||
| SeisImager/2D Software Packages | 1 Relevance | 9 months ago | Randl Rivera | SeisImager Software | |
| Very often I am asked what the difference is between the Lite, Std and Pro versions of the 2D Refraction software licenses. SeisImager/2D Software Packages • Standard version: for use on seismograph with mouse or PC with mouse; allows up to 16K samples per trace, 128 traces per shot, 360 traces per interpretation, and 65 shots per interpretation.• Professional version: for use on seismograph with mouse or PC with mouse; allows virtually unlimited input up to 2M samples per trace, 48K traces per shot, 48K traces per interpretation, and 48K shots per interpretation.• Lite version: included with purchase of Geometrics Windows-based seismographs. For use on seismograph with mouse or PC with mouse; allows up to 16K samples per trace, 64 traces per shot, 51 traces per interpretation, and 12 shots per interpretation.• Demonstration version: for use on PC with mouse, may be launched 15 times; same allowances as Lite version; no printing capability.Note: The number of shots per spread and spreads per interpretation are dependent on the actual trace number used. The Standard and Professional versions are also available for rent. SeisImager Software Suite* Refraction & Surface Wave Data Analysis Software 40 hr - $200 75 hr - $300 250 hr- $500. See Rentals - Geometrics : Geometrics and email rentals@geometrics.com to Set up an order. | |||||
| How to bulk process MagArrow magdata files? | 1 Relevance | 1 year ago | Rui Zhang | Software | |
| If you have many .magdata files to convert, it is more convenient to use the command-based MagArrowConverter, instead of the Windows-based Survey Manager. The MagArrowConverter installation file can be downloaded from this link: Attachment : MagArrowConverterInstaller-2.2.129.0.zip To use the MagArrowConverter: Run “MagArrowConverterInstaller.exe” to install the converter. It is recommended NOT to install the converter on the default C:\Program Files\ directory since some computer may not allow users to create files in this directory. Open Windows Command (“cmd”) and enter the directory where the converter is installed. Type MagArrowConverter and press Enter key. A short instruction of how to use the converter will be printed out. If you run it from a different directory, type the full path, e.g. "C:\ Geometrics\MagArrowConverter\MagArrowConverter" (assuming the program is installed in C:\ Geometrics\MagArrowConverter\ directory). Note that to change the installation directory, you will have to un-installed the program first and then re-install and Set up the directory. A typical example command: …\MagArrowConverter type=MA1 format=csv1 input=”C:\test\test.magdata” output=”C:\test\test.csv” decimation=10 A new csv file with sample rate of 10Hz will be created in C:\test directory from test.magdata file. After you become familiar with MagArrowConverter command, you can write a simple Batch Script to bulk process MagArrow .magdata files. An example batch code which searches for .magdata files in "C:\MagArrowData" folder and converts all files to .csv files at 10Hz is attached below. Attachment : batch example.zip | |||||
| RE: Correct grounding technique for Geode seismographs | 1 Relevance | 1 year ago | Anton Yuriev | Hardware | |
| Thank you for detailed answer. I understood that common practice is separate grounding of each module. Also we will definitely try to shield each geophone with a separate ground, but this will require a large amount of preliminary work. Regarding 50 Hz filtering. We conducted a small experiment in the field to determine the frequencies of background electrical noise captured by geophones. Having Set the minimum possible sampling period for Geod, I recorded 9 consecutive intervals (128 seconds each) of passive observations. This resulted in a total of 19.2 minutes of continuous background noise recording at 125 Hz sampling rate. Then I calculated the signal spectrum from each geophone separately (19.2 minutes of recording), and then obtained the average spectrum for all sensors. For example, the figure in the appendix shows the average spectrum from 24 sensors (red curve) versus the spectrum of an individual geophone (blue curve). In general, I am interested in noise in the 30-50 Hz range. There are no clear peaks at 50 Hz on the frequency response graph. Peaks at 20, 25, 30 Hz are present constantly at any time of the day. In general, the frequency response of passive observation signals increases smoothly with a maximum around 48 Hz. I mean that filtering in some narrow frequency range in this case will not help much in my understanding. Thanks again for the advice. We’ll experiment. Attachment : 24 geophones 19.2 minutes 125 Hz sample rate.jpg | |||||
| RE: Error 56 occurred at TCP Open Connection in MagViewMFAM_V1_1_3_2.vi | 1 Relevance | 1 year ago | Kuldeep Dhiman | Application | |
| Hi Rui Zhang, Thanks for your prompt response.Loading the ethernet firmware did not work. I have the following observations:-1. Dev kit working well with wifi but not getting connected via Ethernet port.3. I have Set the correct IP address in my PC according to the manual and the other post you ask to refer. It was working well a few weeks before with the same Setting.2. Tried multiple attempt to install Tiva_Interface_EK_Public.bin, every time looks like its getting installed because I did not find the btb.bin in SD card after powering it up. If the Tiva_Interface_EK_Public.bin is installed, dev does not work with wifi as expected because Ethernet software is installed ?3. Also tried btb_192.168.2.3.bin and btb_192.168.2.4 provided inside TIVA_Ethernet_EK V1.1.1 Firmware folder. But no Ethernet led blinking on dev kit. I also tried ping using terminal.4. Also tried the Reset switch but the same status. Thanks a lot | |||||
| How to change screen brightness on Panasonic Toughpads | 1 Relevance | 2 years ago | Magnetics SW | MetalMapper | |
| To change the screen brightness on a MetalMapperII Panasonic Toughpad: 1) If you want to type easily, plug a keyboard into the USB socket in the side of the toughpad. Otherwise, use the screen keypad. 2) Open a terminal window (using the Applications menu). 3) Type the following command: sudo bash -c "echo 892 > /sys/class/backlight/intel_backlight/brightness" You will need to enter a password, which is the default password for the standard user. To Set different levels, replace the number 892 with other numbers. 892 is the maximum number allowed; lower numbers will result in a dimmer screen. The change should take place immediately. Then close the terminal window and return to normal use. | |||||
| Is it possible to extend the cables between the MFAM sensors and module? | 1 Relevance | 2 years ago | Gretchen Schmauder | Hardware | |
| The cables between the sensors and the MFAM module are flexible circuit boards, and the length is limited to 20 inches. It is possible to remove the MFAM module from the Development kit box and then reconnect it using a ribbon cable. That would allow you to extend the MFAM module and sensors away from the Dev Kit box. Our engineers have tested it to 4 meters. Below are some details about the ribbon cable. The connector on the MFAM unit is Samtec FSH-110-04-F-DH. Its mating connector is Samtec SFMH-110-02-L-D-WT. The easiest option for an extender cable between the MFAM and the Dev Kit is a pair of cable assemblies from Samtec www.samtec.com which has male/female mass terminate connectors put onto a ribbon cable. These connectors plug directly into the MFAM I/O connector and also into the Development Kit. We are comfortable with lengths to 10 feet total. The samtec P/N for this cable is: FFMD-10-T-60.00-01-F-N The ‘60.00’ number specifies the cable length in inches (which equals 5 feet). We have found that there is generally a 2-4 week lead, time since they are made to order and not an off-the-shelf part. (There is another solution as well if you want to make adapter boards at each end (Dev Kit and MFAM). The exact Samtec mates for the MFAM / Dev Kit connectors are made in PCB mount connectors only, so if you make simple small adapter board to adapt the samtec connector to another connector of your choice. We've done this with ExpressPCB which is fast and inexpensive. A board Set from ExpressPCB is about $70 including shipping. Our Engineering Team has a design and parts list they can send you if you're interested in going this route.) | |||||
| Google Earth KML file in MagNav for MagEx surveys | 1 Relevance | 2 years ago | Rui Zhang | Software | |
| Customers can pre-define a survey area using Google Earth Pro and load the KML file into MagNav app. Open Google Earth Pro. Navigate to your survey area and click “Add Path”. Move your cursor and left click to define the outline of your survey area. You can rename your path name and click OK. Select the new path created and right click it. In the pop-up menu, click “Save Place As” to save it as a kml file. Open the Survey Manager. Load an existing project or create a new project. Inside the project, create a new survey. Set up other preferred parameters. Click “Select Route File” and load the saved kml file. Make sure to click “Save” before exiting Plug in a USB drive and copy the project (.dbt file) to the USB. Eject the USB from your computer to make sure it can be safely removed. Turn on the instrument and the Getac tablet. Make sure the wifi is connected. Plug the USB drive into the Getac tablet. Open the MagNav app. Click “Import Project” to load the project (.dbt file) from the USB. Enter the project and enter the survey. On the Navigation page, the path created in Google Earth will be displayed, which can be served as guidelines or outlines for GPS surveys. Marker points can be created similarly for marked surveys. | |||||
| GPS Clock Options for the Geode/SCS | 1 Relevance | 2 years ago | Gretchen Schmauder | Software | |
| GPS Clocks, used in Continuous Recording systems to provide 1 pps signal to trigger seismograph. Also provides GPZDA serial string to stamp records with UTC for Continuous Recording and Self-Triggering systems. Includes cable Set to connect clock to PC, seismograph, and 12V DC power. There are three GPS clock options for the Geode we sell. They are: GS-101B GPS clock from Orca, 1 pps accurate to within 100 ns of the precise time. Includes waterproof antenna with separate electronics module, with display of time and other indicators. Provides time base during loss of satellite lock. Options to provide 1 pps referenced to an IRIG-B generating source and to enclose electronics module in hardened aluminum case (P/N 25374-59). A101 Smart Antenna GPS clock from Hemisphere GPS, 1 pps accurate to within 20 ns of the precise time. Includes waterproof antenna with integrated electronics, with indicator of satellite lock, no display of time. Provides time base during loss of satellite lock. GC200 GPS clock from San Jose GPS, 1 pps accurate to within 1 μs of the precise time. Includes waterproof antenna with integrated electronics, no display of time or other indicators. No time base during loss of satellite lock. The level of precision needed determines which GPS clock is best suited for the job. Typically the GC200 fulfills the needs of 95% of our clients. | |||||
