If using a TSC1, make sure there is a compact flash or PCMCIA card in the controller.

Occupation times for survey points are on the order of seconds.

Data must be post-processed to achieve high-precision results; this requires a processing program such as Trimble Geomatics Office.

If you have access to raw data from a reference station already operating at an appropriate sample rate in your area (within 10 km of your survey), there is no need to set up an additional base station; note that the logging rate at the base, however, must be at least as high as the desired survey rate.

Topo points are short (usually 15 second) occupations, e.g.

Continuous survey mode allows ongoing data collection at a specified logging interval, e.g.

No line-of-sight (visibility) is required between the base and the rover(s).

For a repeatable survey, you will need a way to center and level the antenna over your mark.

If you are establishing a base marker for the first time, plan to collect at least an hours worth of data.

See the UNAVCO Knowledgebase for more information on antenna mounts ( ).

Note that if you are referencing a previous survey, you must use the same projection and datum that was used before.

If you are starting from scratch, consider using the universal transverse mercator (UTM) coordinate system; determine your zone by checking e.g.

The base receiver must have a logging interval at least as high as the rover receivers; data from the rover can only be processed if corresponding data are collected at the base.

For example, if doing a detailed survey or surveing from a vehicle, a 1 Hz (1 second) logging interval may be appropriate.

For less detailed work andor if walking, a 5 second logging interval may be appropriate.

The survey controller gives control over the survey and records metadata that facilitates data organization.

Note that the TSC1 survey controller will not work with the R7 receiver.

There may be some slight variations in wording from what is shown here, depending on which controller you are using, but the general flow should be the same.

Drop-down menus are indicated by a right-pointing arrow inside a circle.

To see a drop-down menu in the TSC1, highlight the menu item and push the right arrow on the controller; in the TSCe and TSC2, touch the arrow.

To go back a screen, press the Esc key (TSC1) or option (TSCe, TSC2).

In the TSC1, select a memory location for the job; suggested setting is Main memory.

Reference frames are best utilized in data processing rather than data collection.

For No projectionno datum, suggested settings are Coordinates: Ground, Reference elevation: elevation within 100 meters of your base elevation, Use geoid model: No.

Hit OK.

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