Novatel GNSS Receiver and Antenna SMART-AG - Manual (Page 33)

Operation Chapter 3
SMART-AG User Manual Rev 5 33
Commands are typed at the interfacing computing device’s keypad or keyboard, and executed after
issuing a carriage return command which is usually the same as pressing the <Enter> key.
An example of a response to an input command is the FIX POSITION command. It can be as:
[COM2] fix position 51.11635 -114.0383 1048.2 [carriage return]
<OK
where [COM2] is the port prompt, followed by the command you enter from your keypad or keyboard
and [carriage return] indicates that you should press the <Enter> key.
The example above illustrates the command input to the base receiver’s COM2 port, which sets the
position of the base station receiver for differential operation. Confirmation that the command was
actually accepted is the appearance of <OK.
If a command is entered incorrectly, the receiver responds with:
<I NVALID M ESSAGE ID (or a more detailed message)
3.3 Transmitting and Receiving Corrections
RTK or DGPS 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 be sent correction messages from a base
station to calculate differential GNSS positions. The SMART-AG can be used as a base receiver to
transmit RTK or DGPS corrections or a rover to receive the same corrections. An example of a
differential setup is given in Figure 9 on Page 34.
 Ensure the Control Panel’s Power Settings on your computer are not set to go
into Hibernate or Standby modes. Data will be lost if one of these modes occurs
during a logging session.