We are having some issues with LC79D evaluation boards that we are testing.
They seem to provide correct latitude information. However there is a deviation in the longitude information, which increases over a period of time. The error is minimum when the module is restarted, but the longitude error increases over a period of time resulting in a few kilometers deviation.
Do you know whether there are any known issues in the LC79D (A) firmware that may cause this kind of behaviour?
I have not heard of similar issues.Please help provide the test firmware version and NMEA log.
The latest version of LC79DA was released in August. I will send you the firmware by email.
Hello.
The problem is similar to the above, with the accuracy of determining the coordinates.
The firmware LC79DANR01A05S_BETA0622 was installed in the GNSS module. There are incorrect indications of the location of the receiver located motionless at the control point, with the exact coordinates known in advance. With long-term measurement, the measurement error smoothly reaches up to 10 meters south in latitude and about 2 meters east in longitude.
On the previous firmware LC79DANR01A04S, the error also reached significant values, but only intermittently.
Please send the LC79DANR01A06S firmware for testing.
My L76-LB using GPS+beidu has the same problem
Do you know whether there are any known issues in the L76-LB firmware that may cause this kind of behaviour?
Under what circumstances does this phenomenon occur? If possible, please help provide the log.
In addition, have you tried GPS+GLONASS, is there any such phenomenon?