The Solution Interface can be directly accessed by right-clicking on the network in the Uncertainty Context Manager.
Additional controls also offer the ability to update the existing net- work definition and include:
Add Context. Provides a means to add an additional instrument or point group with uncertainties to the network solution.
Add Scale Bar. Add an additional scale bar to the network solution.
Properties. Inspect the properties of the network.
Synchronize From View. Points included in the network solution are not automatically removed if a point is deleted from within SA A primary view. This offers an option to synchronize the results.
Delete. Provides a means to remove items from the solution.
When the Solution Interface opens, it should look quite familiar in that it is based on the USMN network interface control and offers many of the same options. One advantage you will notice right away is that the point uncertainties are immediately displayed based upon potentially unsolved current context status.
Just like USMN, the contributing instruments or context are shown in the top left panel while the composite points are listed on the right.
Max Error is an excellent measure of the quality of a composite point as it reports the greatest contributing deviation.
The Ranking represents the worst case error for the input points with respect to the composite point divided by the 3-sigma un- certainty magnitude for the composite point. Large values are not necessarily bad points if one of several input points hap- pens to have been far more distant from its parent context base.
The solution summary information and statistics are on the bottom right once the network has been processed by pressing the Solve but- ton. Important notes include:
The RMS reported here is in regards to a 3D Magnitude deviation as opposed to only the component deviation. This means that the values will be larger than those reported from USMN by a factor of √3.
A Goodness of Fit value is reported that reflects how well the actual error agrees with expected measurement uncertainty. Ideally this number should be close to 1 and either very large or very small values warrant closer scrutiny.
The Report button will generate a full report in Excel format.
The Apply button can be used to apply the results to the SA job file and build a composite point group using the current solution. This will also update the instrument base covariances with respect to the world frame for all participating instruments.
Like USMN the decision to fix one or more instrument in the list, by un-checking it and preventing them from moving in the solution, will result in the uncertainties propagating outward from those fixed points.