FEMA US&R Response Sys/U.S. Army Corps of Engineers
STRUCTURES SPECIALIST SKILLS TRAINING October 2007
TST – Total Station Training
Theodolite vs. Total Station
1. Theodolites measure horizontal and vertical angles
2. Total Stations combine theodolites with the ability to measure distance.
Infra-red Light Emitting Diode uses a continuous signal and measures the
shift between light emitted by the EDM and the reflected signal to measure
distance. A reflecting target such as a prism or reflector sheet is used.
Pulse Laser Diode transmits a timed-
pulse infrared signal and measures the time
required for the pulse of infrared light to travel
from the instrument to the target and back to
determine distance. A prism is not necessary,
however, this technology has limited distance
capability (about 300 feet).
Tools Contained in the Case
1) Nikon NPL-352
2) Mini Prism, Pole, and Tips
3) Batteries and Charger
4) Power Inverter
5) Shoulder Straps
6) User's Manual
7) Instrument Rain Cover
8) Right Angle Eyepiece:
The right angle eyepiece is used when sighting points at angles greater
than 45° to the horizontal. The existing eyepiece must be unscrewed from the
unit and placed onto the sighting end of the right angle eyepiece.
Measurement Basics and Theodolite Use Page 6
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