INQ1 NMEA Device (COM76) Driver

Description

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Cam Video IM Pro #2, Qualcomm Diagnostics Interface 6000, Qualcomm NMEA Device, HP Photosmart C6300, HP Photosmart C6300 series(DOT4USB), SpeedUp HSxPA USB Modem, 1200CU Plus WIA Scanner, HP Photosmart C4100 (DOT4USB), GlobeTrotter GI210 - Modem Interface, HP Photosmart D5060 Printer (DOT4USB), SPCA506A, WDM Video Capture, USB2.0 TVBox. The message payload conforming to the NMEA 0183 format (i.e., comma separated values) and write it into the output dataset. The PSIC driver then takes this message and appends the NMEA header and checksum to it and sends it out. Note that this driver is not a general NMEA talker. It only generates a specific.

• Position data
  The driver will automatically detect the position format from the first NMEA position sentence supported.
  Driver will decode following NMEA sentences, containing (GPS or RTK) position data:
  • $--GGA,
  • $--RMC,
  • $--GGK, or
  • $--GLL

• Quality
  Driver can be used to decode quality information from NMEA sentences.
  It will automatically decode the supported NMEA quality sentences and copy the values to the previously decoded position data buffer.
  The driver decodes:
  • $--GST,
  • $--GSA
  • $PDAS,QUAL,

• Heading
  Driver will automatically detect the heading format from the first NMEA gyro string.
  The driver is able to decode heading from NMEA sentences:
  • $--HDT,
  • $--HDG,
  • $--HDM

• Communication
  The driver does not actively communicate with the positioning system; it listens to the incoming messages.
  Two communication versions of the driver are available, but the internal workings of the drivers are the same except for the data reception:
  • Serial
  • Network version (UDP).

• Timing
  The time tag of (all) the data is determined from the position sentence, i.e. the time tag of the (first) heading (after the position data) is copied from the position buffer update time.
  However, the data buffers are not updated until the last sentence from an NMEA block is received. NMEA blocks are determined as follows:

• Auto-Detection of NMEA Formats
  1. After starting up, or after a 'Reset I/O' command has been issued by the Qinsy Controller, the driver waits for the first NMEA position sentence that can be properly decoded.
     The NMEA type of this sentence will determine the next NMEA position sentences that are decoded.
  2. All NMEA quality information sentences and NMEA gyro compass sentences that are received before the second NMEA position sentence will be considered to be part of one NMEA block.
  3. The format of the last NMEA quality information sentence or NMEA gyro compass sentence will be used to define the NMEA sentence that will trigger an update of the driver data buffers.
     There is a command line option to disregard gyro compass sentences as trigger strings.
  4. If only NMEA position sentences are received (during the auto-detection phase), then the driver position data buffer is updated for each valid NMEA position sentence of the right format.
  5. Be aware that the auto-detection process will take at least two valid position sentences (twice the position update cycle time) after starting up the driver.
  6. The auto-detection process will be restarted after each 'Reset I/O' command.

• Warnings

  Update Rates
  This driver can be used when an NMEA position, NMEA quality sentence(s) and NMEA heading are received on the same port and at the same update rate.
  If the gyro is updating faster than the positions, then the data have to be split and separate position and gyro systems have to be defined on separate ports.
  The driver also assumes that the position sentence is output first, before quality and gyro heading.

Driver Information

Decoding Notes

Driver will not decode any xxGGA, xxGLL or xxGGK strings if the position fields are empty.

System Configuration

Inq1 Nmea Device (com76) Drivers

Driver can be used to decode '$PDAS,QUAL' quality messages after enabling them in a DSNP Aquarius RTK receiver by defining the following string in its Configuration Setup (KART Real Time solution):

Database Setup

The 'NMEA Position + Heading ($xxGGA/$xxHDT)' and 'POS M/V (NMEA GGA GST GSA + HDT)' entries have been retained for backwards compatibility.
They are the same as the 'CheckSum' driver.

• Heading
  When the NMEA input data block also contains a $xxHDT, $xxHDG or $xxHDM sentence, the driver can also be used to decode the heading data. The driver currently only supports True Heading observations.
  If a HDM heading is obtained, magnetic variation should be entered as for example a (C-O) value, with negative values for westerly variations, since (C-O) values are added to the raw heading observations, or a $xxHVD or $xxHVM sentence should be included.
  Values obtained from HDT and HDG strings are always true headings.
  • Add a system of type 'Gyro's and compasses', select the same NMEA driver and enter the same serial I/O parameters as with the NMEA position driver.
    See the description under 'GYRO SYSTEM DRIVERS'. When this 'NMEA Position + Heading' driver is used, a serial interface cable does not have to be split.

Online

• Computation Setup

  
  In the Controller one can choose which positioning components need to be used in computation.
  • Unreliable Height - Tide
    This means that the height of the positioning system cannot be trusted and that tide will be used as alternative height source.
  • Accurate height- RTK
    This means that the height reported by the positioning system is accurate and will be used as height component.
  • Standard Deviations
    The standard deviations (SD's) are used as Quality Indicators in the computation and for the TPU calculations.
    There are 3 options:
    • System Driver
      The reported SD's by the positioning system (in the $xxGST string) will be used when available.
      This means that the realtime SD's are used and these are the best option to get a more realistic view on the performance of your survey system.
    • Computation Setup
      These are the values entered in the computation in the fields: Position a priori SD and Height a priori SD (only in Accurate Height, otherwise SD of the Tide observation will be used).
      These values are predefined values by the manufacturer or by experience when using them in a static environment.
      They represent accuracies that can be achieved when the equipment is working accordingly.
    • Database Setup
      This is the value entered in Database Setup on page 2 of the device setup, under Position Parameters: A-priori SD.
      This value will online be used:
      • Position a priori SD = value
      • Height a priori SD = 2x value (only in Accurate Height, otherwise SD of the Tide observation will be used).

• $xxGST and/or $xxGSA

  
  
  • Positioning System Display
    The statistical information from $xxGST and $xxGSA sentences are shown in a Positioning System Display.
    The RMS value of the range inputs from the $xxGST sentence is displayed in the MDE box.
    The age of the DGPS data from the $xxGGA sentence is displayed in the Unit Variance box.
    When no $xxGSA sentence is available, the Satellites tab just indicates the number of satellites in use (decoded from $xxGGA sentence).
    
  • Observation Physics Display
    The standard deviations of the latitude, longitude and altitude (height) errors are shown in an Observation Physics Display as the so-called quality indicator of the corresponding positioning system observation.
    

  • Alert Display
    The various statistical measures can be used to define an alert and even to pause storage when such a value is above a certain limit.
    Start up an Alert Display and add an alert of type 'Raw Data Alert'.
    Possible alerts:

    Raw Data - Type	Explanation	$--GGA	$--GST	$--GSV
    Position mode outside limits	alert on GNSS (RTK) solution mode value
    Differential Age above limit	alert on age of GNSS corrections
    Number of Satellites outside limits	Alert minimum required and maximum allowed satellites
    Position RMS outside limits	alert on semi-major axis value
    Quality indicator outside limits	alert on standard deviation (SD) values

    
    The position mode and position RMS alerts can only be defined for the (positioning) system.
    The quality indicator (sd) alerts must be defined for the system and the specific observation, latitude, longitude or altitude (height).
    

  • Time Plot Display
    The Time Plot Display can be used to show the standard deviations reported by the $--GST string.
    
  • Positioning System Display
    

• $PDAS,QUAL

  • Positioning System Display
    The statistical information from $--GGA and $PDAS messages are shown in a Positioning System Display.
    The RMS value of the $--GGA position inputs from the $PDAS message is displayed in the 'Quality measures - a' box.
    The standard deviations of the latitude, longitude and altitude (height) values from the $PDAS messages are shown in the 'SD's - Latitude, Longitude, Height' boxes.
  • Observation Physics Display
    The standard deviations of the latitude, longitude and altitude (height) errors are shown in an Observation Physics Display as the so-called quality indicator of the corresponding positioning system observation.

  • Alert Display
    The various statistical measures can be used to define an alert and even to pause storage when such a value is above a certain limit.
    Start up an Alert Display and add an alert of type 'Raw Data Alert'.
    Possible alerts:

    Raw Data - Type	Explanation
    Position mode outside limit Download acer ac100 driver.	Alert on Kinematic Mode value in $PDAS message 933sh drivers download for windows 10, 8.1, 7, vista, xp. 62 62.rsrc/GROUPICON/MAINICON. 1268 1268.rsrc/VERSION/1. 1444 1444.rsrc/MANIFEST/11992-06-20 06:22:17. 44 44.rsrc/RCDATA/11111. 2238 2216.rsrc/ICON/4.ico.
    Position RMS outside limit	Alert on combined standard deviation value from $PDAS message
    Quality indicator outside limit	Alert on standard deviation (SD) value from $PDAS message Download archos 45 platinum driver.

    The position mode and position RMS alerts can only be defined for the system.
    The quality indicator (sd) alerts must be defined for the system and the specific observation, latitude, longitude or altitude (height).

Drivers IO Notes

It is not advised to change the Driver.io options if you do not understand the impact of the changes.
It is better to consult the Support department for a solid and durable solution.
The Drivers.io will be overwritten when installing a new Qinsy version if the date of the last update of the existing file is older than the one in the new installation CD / MSI.

• NOCS
  Command line parameter 'NOCS' will disregard all checksum fields.

• NOTH
  'NOTH' will not accept an NMEA gyro compass sentence as buffer update trigger sentence, i.e. the data buffers are updated after each NMEA position sentence (or accompanying quality sentence if one was encountered during auto-detection).

Inq1 Nmea Device (com76) Driver Download

• parameters '1', '2' or '3'
  Command line parameters '1', '2' or '3' are only applicable to GGA sentences.
  1. Add a '1' to the drivers.io command line to decode only the first field (if it is already the height above the ellipsoid),
  2. Add '2' to decode only the second field. Be aware that the command line for the corresponding entry for the heading driver must also be changed.
  3. Default is '3' which means that the height value is obtained as the sum of the first and second height fields in a GGA sentence, i.e. the antenna altitude field and the geoidal separation field.