What does a cycle slip look like ??

Does it appear as a spike in the carrier phase graph ???

Is there a correlation between cycle slips and S/N Ratio ??

Jimbo

Hi:

A cycle slip will be a sudden "spike" the carrier phase measurement value. Depending on the scale of the carrier phase graph in Solutions, and the size of the slip, it should be possible see the slip directly. Look for a "Loss of Lock" indicator in the Solutions graph also.

A cycle slip can often be correlated with a lower signal to noise ratio (SNR) vs the SNR at times when the cycle slip did not occur. An example is when a satellite signal first begins to be blocked by a tree --the SNR will start to drop, and cycle slips may also start to occur.

Solutions 2.40 will automatically correct cycle slips in processing. On rare occasions, some slips cannot be corrected. If these slips do not get corrected, the vector will likely have a high RMS value and a "partial" or "float" solution.


Any cycle slips that do not get corrected by Solutions will show up as a spike in the double difference carrier phase plots as well.


Best regards,

Richard

I am not familiar with the software being discussed but there is something I don't understand in the response to the original post. Namely, how can a cycle slip show up as a spike in double difference residuals? I assume the software uses triple differences to automatically clean up the data and with the triple differences the cycle slip will show up as a spike. But with double difference residuals it should show up as an offset in the residuals of an integer number of cycles.

MG,

You are correct.

Does the software provide for both triple difference and double difference residual plots or only triple difference plots?

Only the double difference residuals are plotted.