Understanding Baselines and Vectors (for TGO Users)

For those familiar with Trimble^® Geomatics Office™ (TGO), it may be useful to understand the terminology used in this software. Unlike TGO, this software defines baselines as separate objects from vectors. Prior to processing baselines are created based on synchronous observations at two locations. After these baselines are processed, vectors are created. Here are some of the differences between baselines and vectors:

• Baselines appear as green lines; vectors appear as blue lines.
• Disabled baselines are not processed.
• Vectors are created from baselines that have been processed.
• When you clear processing results, the vectors are removed from the project.
• If a baseline has been processed and is subsequently disabled, it will have its vector result removed from the project.
• Disabled vectors are not used during network adjustment.

Note that unlike TGO, in which you can select the tropospheric model to use for baseline processing, Trimble Business Center automatically determines whether to use the Hopfield or Neil model. The Hopfield model is used for all kinematic sessions and for static sessions in which the session is 1 hour or less and the baseline length is 2 kilometers (1 ¼ mile) or less. The Neil model is used for static sessions in which the session is more than 1 hour and the baseline length is greater than 2 kilometers.