Geophysical Survey Systems, Inc. Model 5106 Antenna System Settings and User Notes User Manual We Provide Complete Survey Solutions Geophysical Survey Systems, Inc. 13 Klein Drive, P.O. Box 97 North Salem, NH 03073-0097 Phone: (603) 893-1109 / FAX: (603) 889-3984 www.geophysical.com sales@geophysical.
Limited Warranty, Limitations Of Liability And Restrictions Geophysical Survey Systems, Inc. hereinafter referred to as GSSI, warrants that, for a period of 12 months from the delivery date to the original purchaser, GSSI's products will be free from defects in materials and workmanship. EXCEPT FOR THE FOREGOING LIMITED WARRANTY, GSSI DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
This device complies with part 15 of the FCC Rules: Operation is subject to the following conditions: 1. 2. This device may not cause harmful interference, and This device must accept any interference received, Including interference that may cause undesired operation Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
Table of Contents Table of Contents.......................................................................................................................4 Chapter 1: Introduction ............................................................................................................5 Overview of this Manual..................................................................................................5 Chapter 2: Hardware Configuration .................................................................
Chapter 1: Introduction Terravision II is GSSI’s first truly One-Pass 3D system. This affords faster and more accurate data collection and target identification than has ever been available before. The design goal has been to assist you in detecting the location, depth and angle of pipes --- automatically. The Terravision II let’s you collect a six-foot wide ribbon of data at a range of speeds and resolutions that adapt to your application.
Figure 1: One possible Terravision II configuration.
Chapter 2: Hardware Configuration Let’s begin with an overview of where the pieces go and how to hook them together. Hardware Components The main component is the two-wheeled cart. It contains the frame and hitch (in gold), the antenna sled (in white) and a right and left antenna array pair (in white). The Right antenna is the Master antenna and goes on the right side as you face forward The Left antenna is the Slave antenna and goes on the left side as you face forward.
Cable Connections Considering its complexity, it may be surprising that Terravision II has only a handful of connections. 1) 2) 3) 4) 5) The survey wheel has a cable coming out of the frame that gets hooked up to either antenna array. A foot-long cable connects the two antenna arrays together. Two identical cables go from the Antenna Array to the Controller Box. Make sure to get the male and female ends right. It doesn’t matter which connection you use on the Controller Box; they are identical.
Chapter 3: Data acquisition procedure The data acquisition procedure is so simple that it is easy to make basic mistakes during data collection. But if everything is set up right, it is a four click process. Let’s go through this first, and then get into the sometimes tricky details. Data Collection Step 1: Turn on the key to the Controller Box. Since the two computers inside the Controller box need time to boot up, wait about 45 seconds after it is turned on before Step 3.
Figure 4: SETUP Screen. Step 5: Hit INIT to initialize the gains on all fourteen antennas. When beeping stops, and when the O-Scope pattern on the right starts moving again, it is finished. Step 6: Hit START. The next O-Scope screen will appear blank. It is waiting for you to move forward. It will not show data until you have moved forward about half the length of the antenna array (Figure 5). Figure 5: START Screen.
Figure 6: Scroll View Window has flexible display parameters. th The Scroll View (Figure 6) lets you preview the output during collection. Only every 16 scan is displayed (to not waste processing time) but it is enough to see general trends and pipes in the data. Step 7: Hit STOP when you are finished the survey. Start the next survey by hitting START again (etc.). The filename increments automatically.
Acquisition Details Positioning A good survey requires accurate and repeatable positioning. There are three ways we try to help. 1) Mark your starting position in a way you can refer to, either with tape of spray-paint of a stick etc. The starting line on our antenna is the forward-most line marked on top of the antenna arrays. On this line, the position of the right-most antenna is the defined as (0,0) (Figure 7).
I n The first menu (Main) hit CONFIG. In the next screen hit SURVEY WHEEL. This pops up a dialog box with the internal numbers of the Right (Even) and Left (Odd) antenna arrays (Figure 8). We calibrate only one, and then copy the result to the other, making sure they are exactly the same. Select the even one and hit OK. The next dialog box gives instructions on how to calibrate. Hit START. Move forward the “Calibration Distance.” Hit Stop.
3) Keep good notes, either in our software or in a notebook. The SETUP menu offers a place in which to write PROJECT Notes (Figure 9). These notes go with the created 3D File and can be viewed in the Header in RADAN during postprocessing. If you do a subsequent survey the filename increments automatically, but the other information remains the same unless you change it.
Depth Measurement Before running a successful survey, you need to know two things: 1) How far down do you want to see. 2) What type of soil you are over. (i.e. what dielectric value should be set.) If you don’t know 2), we have tricks to help get you this information. This is the information used to fill the CONFIG table (Figure 10). Figure 10: Configuration Page A typical matrix is shown above. However, if you happen to know the exact soil type, then you can enter the exact dielectric value in.
Manual MN71-082 Rev - 16
Chapter 4: Post-Processing Procedure Transferring data to RADAN Once the data is collected remember that it still resides only in the memory inside the antennas, not yet in the laptop. To transfer the data so you can look at it in RADAN, return to the main menu and hit FILES. The TII Control Center pops up which lets you transfer files to your laptop. Highlight the file(s) and hit COMBINE. This sorts the data into a standard 3D RADAN.
Appendix B: Troubleshooting Problems Problem: Some lights don’t turn on, or don’t shut off Solution: When unusual behavior appears there are usually only two culprits 1) Occasionally the antennas get confused about what state they are in. Try closing the TII program on the laptop, then shutting off the power to the CONTROL BOX. Turn it back on and then re-run the T2 application. Eveything should now behave.
Problem: RADAN-NT crashes while trying to write a file: Solution: There are two possibilities: 1. Check to make sure there is enough disk space on the disk containing the Output file path. Allow for at least twice the combined space taken up by the input file (*.dzt) and the *.ind file. 2. Check to make sure the default output path exists. The output path is specified in the Customize menu item. See Appendix C for details on locating and setting the default output path.
