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| Illustration 1 | g03229256 |
"GPS" page | |
The "GPS" page displays menu items to configure Global Navigation Satellite System (GNSS) settings and to view GNSS-related parameters. Refer to Illustration 1.
The following menu items are accessed from the "GPS" page:
- "Corrections Configuration"
- "Corrections Statistics"
- "Geo Transform File Upload"
- "APP File Upload"
- "Data Link Statistics"
- "Position Information"
- "Tracking Loop Configuration"
Note: The "Corrections Configuration", "Tracking Loop Configuration", "Geo Transform File Upload", and the "APP File Upload" pages are not available in view-only mode. Customer or dealer users must log in to access these menu items.
"Corrections Statistics"
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| Illustration 2 | g03229277 |
"Corrections Statistics" page | |
The "Corrections Statistics" page is provided to view various statistics of the GPS corrections.
The following sections are provided:
- "Count"
- "Availability"
"Count"
"Rx Count" - This value is the number of valid messages that have been received from the base station since the last reset.
"Tx Count" - This value is the number of messages that have been sent to the base station since the last reset.
"Rx Error Count" - This value is the number of messages that could not be received from the base station to the health interface module since the last reset.
"Tx Error Count" - This value is the number of messages that could not be sent to the base station to the health interface module since the last reset.
Note: The health interface module software for the base station is not designed to send messages to the base station. The "Tx Count" value and the "Tx Error Count" value should remain 0. The "Statistics" page displays a default value of 0 for all parameters when the ECM is powered OFF/ON. As soon as data is exchanged between the health interface module and the base station, the appropriate count is incremented. If the base station stops sending data to the health interface module, the previous values that were displayed remain displayed on the web page. The statistic values are only reset back to 0 if the ECM is power cycled, or the "Clear" button is pressed.
"Availability"
This section provides availability and lost values for 1 min, 10 min, and 60 min time frames that the health interface module was receiving corrections.
1 min - This section indicates the percentage of time within the previous minute that the health interface module was receiving corrections and percentage of lost corrections. If the value is "100%", then corrections have been received for the previous minute. If the value is "0", then no corrections were received over the previous minute.
10 min - This section indicates the percentage of time within the previous 10 minutes that the health interface module was receiving corrections and percentage of lost corrections. If the value is "100%", then corrections have been received for the previous 10 minutes. If the value is "0", then no corrections were received over the previous 10 minutes.
60 min - This section indicates the percentage of time within the previous 60 minutes that the health interface module was receiving corrections and percentage of lost corrections. If the value is "100%", then corrections have been received for the previous 60 minutes. If the value is "0", then no corrections were received over the previous 60 minutes.
"Data Link Statistics"
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| Illustration 3 | g03229362 |
"Data Link Statistics" page | |
The "Data Link Statistics" page is provided to view data link information of the satellite receiver.
"Rx Count" - This value is the number of messages received from the satellite receiver since the last reset.
"Tx Count" - This value is the number of messages sent to the satellite receiver since the last reset.
"Rx Error Count" - This value is the number of invalid messages that were received from the satellite receiver.
"Tx Error Count" - This value is the number of messages that could not be sent to the satellite receiver.
Note: The values are displayed in real time. The web page is refreshed automatically.
Note: The "Clear" button is provided to reset all values back to zero.
"Position Information"
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| Illustration 4 | g03229376 |
"Position Information" page | |
The "Position Information" page displays GPS status and position information. The following information is displayed:
"Connected" - This value is either "Yes" or "No".
"GPS Source" - This value provides information about the source of the position information. The following data may display:
- "No Source"
- "Initialization in Progress"
- "Low Precision SK8 GPS Receiver"
- "Low Precision MS3xx GPS Receiver"
- "High Precision GPS Receiver"
"DGPS Mode" - This data indicates the mode of the satellite receiver. The following modes are possible:
- "No message from GPS receiver"
- "Invalid GPS messages detected"
- "No fix available"
- "2D fixes, no corrections"
- "2D fixes, with corrections"
- "3D fixes, no corrections"
- "3D fixes, with corrections"
"Easting" - This data is the easting value that is reported by the satellite receiver in local coordinates. The value is the Eastward distance in meters of the receiver from the reference point defined in the uploaded AppFile.
"Northing" - This data is the northing value that is reported by the satellite receiver in local coordinates. The value is the Northward distance in meters of the receiver from the reference point defined in the uploaded AppFile.
"Elevation" - This data is the elevation value that is reported by the satellite receiver in local coordinates. The value is the Upward distance in meters from the reference point defined in the AppFile uploaded to the receiver.
"PDOP" - "PDOP" refers to Position Dilution of Precision. This value is a measure of overall uncertainty in a GPS position solution. The best PDOP (lowest value) would occur with one satellite directly overhead and three others evenly spaced about the horizon.
"HDOP" - "HDOP" refers to Horizontal Dilution of Precision. This value is a measure of how well the positions of the satellites, used to generate the Latitude and Longitude solutions, are arranged.
"VDOP" - "VDOP" refers to Vertical Dilution of Precision. This value is a measure of how well the positions of the satellites, used to generate the vertical component of a solution, are arranged.
"TDOP" - "TDOP" refers to Time Dilution of Precision. This value is a measure of how the satellite geometry is affecting the ability of the satellite receiver to determine time.
Note: The four Geometric Dilution of Precision (GDOP) components, "PDOP", "HDOP", "VDOP" and "TDOP" are computed from the geometric relationships between the satellite receiver position and the positions of the satellites that the receiver is using for navigation. These values are an indication of the accuracy of the GPS position. A value less than four indicates the best accuracy. A value between four and eight indicates an acceptable accuracy. A value above eight indicates poor GPS accuracy.
"Latitude" - This value is the geographic coordinate that specifies the north-south position of the satellite receiver. The value is displayed as "DD° MM' SS.SSSS" P" where "D" stands for degrees, "M" for minutes, "S" for seconds and "P" for direction.
Note: The value for "P" may be either N or S. Also, the field may be empty if the value for degrees, minutes, and seconds are all 0.
"Longitude" - This value is the geographic coordinate that specifies the east-west position of the satellite receiver. The value is displayed as "DD° MM' SS.SSSS" P" where "D" stands for degrees, "M" for minutes, "S" for seconds and "P" for direction.
Note: The value for "P" may be either E or W. Also, the field may be empty if the value for degrees, minutes, and seconds are all 0.
"Height" - This value is the elevation of the satellite receiver in meters.
"Satellite Count" - This value is the number of satellites that can be viewed by the satellite receiver.
"GPS Health" - This value provides information on the health status of the position. The information is provided in two parts. The first part indicates the status of the position. The second part provides detailed information about the status if there is an issue.
Examples of GPS health status strings:
- Ok
- Current position not available (using previous position)
- 2D position only (not enough satellites)
- 3D position available (high PDOP)
"UTC Time" - This data is the current date and Universal Time Coordinated (UTC) time.
"Local Time" - This data is the current date and local time on the health interface module.
"Firmware Version" - This data is the current firmware version of the satellite receiver.
"App File Uploaded" - This field is the name of the last App file that was successfully uploaded to the device.
"APP File Upload Status" - This information is the status of the last APP file upload attempt to the satellite receiver. The following information is possible:
- "Unknown": When no APP file is uploaded to the satellite receiver (for example, brand new ECM)
- "In Progress": When the upload operation starts
- "Success": When no error occurred during the upload of the last valid APP file
- "Failure": When an error occurred during the upload of the last valid APP file
- "Time Out": When a time-out occurred during the upload of the last valid APP file
- "Receiver Not Present": When the ECM detects that the satellite receiver is absent or incorrectly connected, before the end of the initialization phase after the ECM start-up cycle
- "Receiver Not Compatible", when the ECM detects that a wrong satellite receiver is connected
Note: If the application file was uploaded using any other tool other than the health interface module or if new satellite receivers were installed, then the information may not be accurate.
"Tracking Loop Status" - This information is the status of the last "Tracking Loop" configuration to the satellite receivers. The following information is possible:
- "Receiver Default": When no request is sent to the satellite receivers.
- "No Response": When no response is received from the satellite receivers.
- "OK": When the receiver tracking loop mode and positioning engine matches the configuration.
- "Not Supported": When the receiver tracking loop mode and positioning engine do not match the configuration.