Precise Baseline Surveying Set

A Precise Baseline Surveying Set is a collection of instruments used in the field of surveying to establish accurate baselines for measuring distances and angles. It is classified under the supply class Drafting, Surveying, and Mapping Instruments in the supply group Instruments and Laboratory Equipment.

The set typically includes the following instruments:

1. Baseline Rod: A long, rigid rod used to establish a straight line baseline. It is usually made of aluminum or fiberglass and is marked with precise measurements.

2. Theodolite: A precision instrument used to measure horizontal and vertical angles. It consists of a telescope mounted on a tripod, with graduated circles for accurate angle measurement.

3. Total Station: An electronic instrument that combines the functions of a theodolite and an electronic distance measurement (EDM) device. It can measure angles and distances simultaneously, providing accurate and efficient surveying data.

4. GPS Receiver: A Global Positioning System (GPS) receiver is used to determine precise positions on the Earth's surface. It receives signals from multiple satellites to calculate accurate coordinates.

5. Leveling Instrument: A leveling instrument, such as an automatic level or a digital level, is used to establish a horizontal reference plane. It is used to determine height differences and ensure accurate measurements.

6. Tripod: A sturdy support stand used to mount the theodolite, total station, or leveling instrument. It provides stability and allows for precise adjustments.

7. Accessories: The set may also include various accessories such as prisms, reflectors, range poles, plumb bobs, and other tools used for specific surveying tasks.

These instruments are essential for conducting precise baseline surveys, which are used in various applications such as land surveying, construction, engineering, and mapping. They enable surveyors to establish accurate reference lines and measurements, ensuring the reliability and accuracy of survey data.