What are the quality indicators on the data sheet?
A quality indicator is the average value of the w-ratio at the last three epochs of data. The w-ratio is a measure of how well the LAMBDA algorithm was able to determine the correct integer ambiguities. There are two of them because OPUS-RS uses the RSGPS program twice. The network mode run uses only data from the reference stations; its purpose is to determine the ionospheric and tropospheric refraction for the time and location of the user’s data set. The rover mode run uses the information from the rover run to find the user’s position. Values of the quality indicators below 1.0 should be taken as warning signs. However, low quality indicators by themselves don’t tell the whole picture – it is possible to have low quality indicators along with low standard deviations (located to the right of each position component) and still have a good solution.
