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Istruzioni per l'uso Novatel, Modello SMARTV1G

Produttore : Novatel
File Size : 519.85 kb
File Nome : gm-14915074.pdf
Lingua di insegnamento: en
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Facilità d'uso


Abbreviated ASCII is the best format to use when you wish to work with the receiver directly. For data collection, use ASCII or Binary. • Press Enter to send the command string to the receiver. • The commands are not case sensitive. The OEMV Family Quick Reference Guide provided with the receiver lists the available commands and the parameters they use for the Abbreviated ASCII format. LOGGING DATA An extensive collection of logs has been created to capture the data your SMART-V1/V1G receives and processes. These logs can be directed to a SMART-V1/V1G port (COM1, COM2 or USB) and can be automatically generated when new or changed data becomes available or at regular intervals. The available logs are listed in the OEMV Family Quick Reference Guide. To log data, use the LOG command. For example, to log the pseudorange position to COM 2 every 30 seconds, enter the following: LOG COM2 PSRPOS ONTIME 30 Logs can be generated in one of three formats: ASCII, Abbreviated ASCII, or Binary. Refer to the OEMV Family Firmware Reference Manual (OM-20000094) for information on the LOG command, specifying the output format, and the detailed contents of each log. If you prefer, CDU provides a graphical interface for configuring data logging. Select Logging Control Window from the Tools menu. In the Logging Control window, you can select which logs to capture and choose to which ports to send the data. In addition, you can specify a file in which to save the data. ENABLING SBAS POSITIONING SMART-V1/V1G models are also capable of SBAS positioning. This positioning mode is enabled using the SBASCONTROL command. The following commands are typically used to enable WAAS (North America) and EGNOS (Europe) systems: SBASCONTROL ENABLE WAAS SBASCONTROL ENABLE EGNOS Once enabled, the Position Type field shown in CDU’s Position window should change from Single to WAAS and you may see SBAS satellites in the Constellation window. ENABLING L-BAND POSITIONING L-Band equipped receivers allow you to achieve sub-meter accuracy. To use this positioning mode, you must enable L-band tracking to the Canada-Wide Differential GPS (CDGPS) or OmniSTAR signal. A subscription to OmniSTAR is required to use the OmniSTAR service (visit and have your receiver’s serial number ready). The CDGPS signal is free and available without subscription over North America (visit The ASSIGNLBAND command allows you to set OmniSTAR or CDGPS base station communication parameters and to start tracking L-Band satellites. It should include a relevant frequency and data rate. The frequency assignment can be made in Hz or KHz. For example: Hz: assignlband omnistar 1536782000 1200 KHz: assignlband omnistar 1536782 1200 A value entered in Hz is rounded to the nearest 500 Hz. To confirm you are tracking an L-Band signal, log the L-Band status information by entering: log lbandstat. For example, if you are receiving CDGPS, the fifth field after the header should be 00c2: lbandstata com1 0 43.5 finesteering 1295 149951.671 00000000 976f 34461; 1547546977 46.18 4541.0 0.00 00c2 00f0 ... To specify the correction source, use the PSRDIFFSOURCE command as shown in the examples below: PSRDIFFSOURCE OMNISSTAR or, PSRDIFFSOURCE CDGPS otherwise it is left at the default AUTOMATIC. • Refer to the OEMV Family Firmware Reference Manual for more details on individual L-Band or SBAS commands and logs. REAL-TIME KINEMATIC (RTK) POSITIONING Corrections can be transmitted from a base station to a rover station to improve position accuracy. The base station is the GNSS receiver which is acting as the stationary reference. It has a known position and transmits correction messages to the rover station. The rover station is the GNSS receiver which does not know its exact position and can receive correction messages from a base station to calculate differential GNSS positions. In most cases you need to provide a data link between the base station and rover station (two NovAtel receivers) in order to receive corrections. SBAS and L-Band corrections can be accomplished with one receiver and are exceptions to the base/ rover concept. Generally a link capable of data throughput at a rate of 9600 bits per second, and less than 4.0 s latency, is recommended. Once your base and rover are set up, you can configure them for RTCM, RTCMV3 or CMR corrections. An RTCM example follows (replace the latitude, longitude and height coordinates shown in the FIX command line with those of your base): Base interfacemode com2 none rtcm off fix position 51.11358042 -114.04358013 1059.4105 log com2 rtcm3 ontime 10 log com2 rtcm22 ontime 10 1 log com2 rtcm1819 ontime 1 log com2 rtcm1 ontime 5 Rover interfacemode com2 rtcm none off RT-20, with AdVance RTK, is a real-time kinematic software product developed by NovAtel. Optimal RTK performance is achieved when both the base and rovers are NovAtel products. However, AdVance RTK will operate with equipment from other manufacturers wh...

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