Hardi HC 8500, Руководство оператора, Страница: 172 / 184

7 - Fault finding
7.8
The ParaDyme roof module is receiving information from the Base Station, but the signal is not strong enough
for an RTK fix.
•
GPS Speed
•
Position Rate
The frequency that the receiver is sending the display your position in longitude and latitude (GGA). For example, at 5
Hz the display would be receiving a position message 5 times every second.
•
Speed/Heading Rate
The frequency that the receiver is sending the display your ground speed and heading (VTG)
÷
NOTE! Position Rate and Speed/Heading Rate should both be set at a minimum of 5 Hz for guidance or steering.
•
Change Longitude/Latitude Format
Pressing this button changes the Longitude/Latitude format. These can either be shown in Degrees, Minutes and
Seconds; or Decimal Degrees.
•
View Messages
To view the NMEA or TSIP messages coming from the receiver, press the View Messages button.
•
UTC Time
UTC is an acronym for Coordinated Universal Time, a high-precision atomic time standard that defines local time
throughout the world. Different versions of universal time use atomic clocks to correct for irregularities in the Earth's
rotation and orbit. UTC is used in navigation, astronomy, aviation, Internet broadcasts, and amateur radio. If you are
receiving information from the satellite, then the UTC Time should automatically update.
•
UTC Date
If you are receiving information from the satellite, then the UTC date should automatically update.
•
HDOP
Horizontal Dilution of Precision (HDOP) indicates the quality of the horizontal GPS position. Lower HDOP numbers are
optimal, higher numbers are undesirable.
•
PDOP
Position Dilution of Precision (PDOP) is a unitless measure indicating when the satellite geometry can provide the most
accurate results. When satellites are spread around the sky, the PDOP value is low and the computed position is more
accurate. When satellites are grouped close together, the PDOP is high and the positions are less accurate. Lower PDOP
numbers are optimal, higher numbers are undesirable.
•
Port
The connection between the display and the GPS as established at a message format and baud rate.
•
Frequency
The Correction Frequency indicates the GPS satellite frequency used by the receiver.
÷
NOTE! The Correction Frequency diagnostic does not show for WAAS connections.
•
SNR
If your receiver is using Beacon differential corrections, the frequency and signal to noise ratio (SNR) will be displayed.
Signal-to- Noise Ratio (SNR) indicates the strength of the differential correction signal in relation to the amount of
background noise that can interfere with signal reception.
•
Correction Age
The length of time since the GPS receiver has obtained its last update.
÷
NOTE! The age of the DGPS corrections (as delivered to the GPS receiver) will vary from one second to several seconds,
depending on the characteristics of the individual satellite signals.