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TECHNICAL SUPPORT – PRODUCT WORKFLOW SDR Level 5 – GSR2700IS Workflow The following workflow will guide you when using the SDR Level 5 software with the GSR2700IS receiver. It includes directions for setting up the receiver and the data collector and communicating with SDR Level 5. The workflow is applicable to those using an Allegro or JETT ce data collector with Bluetooth (either integrated or via a Bluetooth card) and version 5.55 (or higher) of SDR Level 5.
Section 1: Setting Up the Data Collector for Bluetooth Complete the following steps to configure the data collector for Bluetooth communication with the GSR2700 IS. 1. Double-tap the <Bluetooth Devices> icon on the device desktop, or select the <Bluetooth> icon in the system tray and select Advanced Features | Bluetooth Devices. 2. Select Tools | Device Discovery. 3. Select Next>. 4. Select “Any Bluetooth device”, then select Next>. The device will display a list of the devices found. 5. Check the box for “GSR2700 IS <serial number>”, then select Next>. 6. Select Finish. 7. Select Tools | My Favorites. 8. Select the COM Port tab. 9. Select “Use the favorite selected above”. 10. Choose “GSR2700 IS <serial number>” as the favorite in the drop-down list. 11. Select <OK>. 12. Select Device | My Bluetooth Device. 13. Select the COM Ports tab. 14. Ensure that the “Bluetooth COM Port” check box is checked. Make note of the COM port number associated with it; you will need this number when setting up communication using SDR Level 5. Allegro CX is generally COM6. 15. Select <OK>. 16. Close the Bluetooth Devices screen by selecting <X> in the upper right-hand corner.
Section 2. Creating a Job 1. Func | Job | New 2. Type in the name you desire for Job. <Enter> 3. Determine if you want to work in a XFM (known system) or if you want to calibrate to a local (or known) coordinate system. Note: If you want to work in a XFM, then skip to section 6. If you are going to calibrate (transform) to a local system, then read on. 4. The point ID field may be set to Numeric4 or Alpha14 depending on your application. You can toggle this with the right arrow on the keyboard as well as the pull-down menu on the touch screen. <Enter> 5. If all of your atmospheric corrections look sufficient, then hit <CTRL> + <Enter> to confirm the whole screen. 6. Hit <Enter> to confirm the Job notes screen. Date: 02-03-06
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Section 3. Instrument Connect 1. Select Func | Units to verify if you are in the correct units for your project area. Your choices are: USFeet, Feet (intn’l) and Meters. 2. Select Surv | Keyboard Input | Coordinates. 3. Here, you must keyboard input the known coordinates for your survey area that you plan on calibrating to. Note: Make sure that you give the point id’s something that is easy to remember, because these will become important when it is time to calibrate the job. You can <Enter> through the fields, and then hit <CTRL> + <Enter> to save the point in the database. You can hit <CTRL> + <V> to see that it is in there. Repeat this for all calibration points you have. 4. 5. 6. 7. 8. 9. 10. 11. 12.
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Select Func | Instrument. In the Instrument Setup screen, select GPS RTK from the Type list. (Fig.1 - below) Select GSR2700 IS from the Model list. Select Store OBS to NO From the Port list, select the port the device is associated with. (see Section 1, step 14) Select Bluetooth from the Port type list. Select 38400 as the Preferred rate (default). Select either GOBS or Position mode (GOBS – vector based / Position – WGS84 position based) Select Data Port to Internal Radio (or COM2 if you are using an external radio). If your receiver features an Internal Modem instead then you would set this option to Internal Modem (see Appendix A for dial-up instructions). Select <Query> button to initiate communication with the receiver. A message box displays “Working” and then “Connect”. If communication is successful, a new field displays in the Instrument Setup screen: Data Format – Proprietary, and the serial number displays in the Serial no. field. The “Proprietary” format would be known as “RTCA” and is what would be standard when communicating between two Sokkia receivers. Other options include RTCM and CMR. Press the <ANT> soft-key (F1 on AllegroCX) to verify that your antenna model is “GSR2700IS” and your method is vertical (if using a calibrated rover pole). You may also choose slant here, if you are measuring your rover H.I. using the slant method. Press <CTRL> + <ENTER> to exit this antenna screen. Press <CTRL> + <ENTER> to finish out the connection. You will see the “Working…Connect” dialog box again. Press <YES> to save the settings to the receiver. Enter your BASE antenna model and offset method. Press <CRTL> + <ENTER>
Instrument Setup – Page 1
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Instrument Setup – Page 2
Section 4: Collecting Data in Topography 1. Select Surv | Topography. 2. Key in a starting coordinate GSTN. Generally, you will want to start with point 0001 for your GSTN and key in 0,0,0 for northing, easting and elevation. If you had set a XFM-KNOWN option when you created the job, then it is required that you enter the KNOWN Northing, Easting and Height of the BASE. Note: Your antenna height is for the BASE not the rover. You are essentially keying in starting grid coordinates for the BASE receiver. 0,0,0 is fine to use here because we will be calibrating to a real coordinate system later (unless XFM-KNOWN was used). Hit <CTRL> + <Enter> to confirm the GSTN. 3. Key in your rover antenna height and hit <Enter>. 4. You should be presented with a screen that shows you latitude, longitude and elevation. This is referred to as the “projection record”. To confirm this, you must hit <CTRL> + <Enter>. 5. You should now be in the idle “Take Reading” screen. To take readings, press the TAB key on the Allegro or <CTRL> + <R>. A reading should be initiated, and you should see your RAW data popluated in the screen (Hobs, Vobs, Sdist). Note: You can choose what reading type you want by selecting Func | Configure Reading. Here, in the “End Obsvn” field you can select from three types: 3DRMS (easiest), Epoch (countdown from 10) and Manual (you dictate the length of reading by using Start – Stop). In 3DRMS, you define a precision tolerance that will automatically take readings if under a certain tolerance. Usually this can be left to default (.025m), but can be set for higher. 6. It now comes to the time to calibrate the job (if you used XFM-KNOWN, jump to step 11). Take readings on each of your calibration points in the field (CTRL + Enter), and make SURE you give them the SAME point Id’s as what they existed as when you keyed them in (in Keyboard input earlier). Since these points already exist in the database, it will prompt you for an action when you try to store it. Here, you need to arrow right until it says STORE GOBS and enter it. Repeat this process for all of your calibration points. 7. Select Surv | GPS Coord System. 8. You should see a list of your calibration points (it puts all points that have keybd inputs and GOBS in there). 9. Hit <Enter> and select from one of the three calibration types: Horizontal only (min. 2 pts.), Vertical only (min. 1 pt) or Horizontal/Vertical (min. 3 pts.). Hit <Enter> on one of them. 10. You will see the results of the calibration. Take note of scale factor (it should be near 1). Hit <Enter> to accept the calibration. Your job is now on the new coordinate system. 11. Repeat the READ function on the collector for more topography readings. This must be done from the “Take Reading” screen. On the Allegro CX, you may press the TAB button on the keyboard for a single key read. 12. You may also wish to see your data graphically (plan view). You can press <CTRL> + <W> at any time in SDR Level 5 to see your data graphically (example below).
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Section 5: Staking Out a Coordinate 1. Select Cogo | Set Out Coords. 2. Enter in the point ID that you want to “Stake Out” and hit <Enter> after highlighting it. 3. You should now see your navigation information. “Azimuth” is telling you the direction that you need to go to arrive at your stakout point (0-360). “Hdist” is telling you the distance to the point. “Fill” is telling you how far above or below the point you are. Note: If you are not using elevations, then this field will be <Null>. 4. Hit <Enter> when satisfied with the staking information. 5. Hit the <Store> softkey, or hit <Enter> again to store the staking information. You may also <Read> the point again if desired. 6. A nice feature with the SDR software is the <CTRL> + <P> hotkey. When in the navigation mode of set out coordinates, press this combination of keys and you will be presented with a graphical navigation screen (bullseye) that contains much of the same navigation information as earlier (example below).
Section 6: Creating and Using XFM jobs 1. 2. 3. 4.
Select Func | Job | New Type in the desired job name and hit <Enter> (or down arrow). Toggle the “Select XFM” field to YES. <Enter> For Transformation, you will want to choose the *.XFM file that is installed on your data collector. A *.XFM file contains a set of parameters that are specific to a projected mapping system, such as “UTM.” 5. For “Zone”, you must input the correct zone that you will be surveying in: (ex. Zone 15). 6. For the Coord System, you will more than likely want to select “Known”, but “Unknown” may be used as well. Here is the difference between the two: Known is assuming that you are going to set the BASE up over a known SPC coordinate. It then will expect you to later key this coordinate in as your GSTN (starting) coordinate. The Unknown option will still allow you to do a calibration, but to only one point. You would key your GSTN coordinate in as something like 0,0,0. You then key a state plane coordinate in under Surv | Keyboard Input and key your single state plane coordinate. You would then take a rover topography reading to the point giving it the same point id (as the keyboard input) and store it as GOBS. Then go into Surv | GPS Coordinate System to calibrate to the one point. (For further details on calibration, see Section 4). Date: 02-03-06
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Appendix A: Dialing Into a Base with 2700IS Internal Modem After the steps 1, 2 and 3 in this workflow have been completed, there are some special functions that need to be executed in order to successfully dial into a base receiver broadcasting RTK corrections. 1. 2. 3. 4. 5. 6. 7. 8.
Select Func | Communications Highlight the “Data Format” combo box, and press the right arrow (or pull-down) the option for GPS LINK. Press Start. Enter the phone number for the base unit. Just type the numbers only (i.e. 5551212) Leave the Init String field blank. Press <CTRL> + <ENTER> You should see a dialog box say, “Dialing”. When the connection is complete, it will take you immediately to the GPS Status module. From here, you can check Geometry, Differential or Current Position (to name a few). The differential section should tell you whether you are receiving data or not. You should have a solution (i.e. fixed or float) and a correction age. 9. Continue with normal SDR Level 5 operations (see sections 4 and 5).
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Published on Apr 29, 2008
Workflows for Sokkia GSR2700IS and SDR Level 5 software to be combined into a powerhouse GPS System. Palmetto Equipment and Supply, Inc. is...