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Data acquisition
and recording devices
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The purpose of our data acquisition systems is to accept all the data outputs from various geophysical, navigation and auxiliary sensors of an airborne and mobile survey system or other monitoring installation, recording them in digital form on disk and/or tape, and displaying the data on a graphic recorder.
By today's standards, the data system should be programmable allowing the user to define the sampling rates for the incoming data as well as the recording format. Since there are many different data types occurring at different rates such as analog (EM systems, altimeters etc.) and digital (serial RS232, ARINC, Gamma-Ray Spectrometer, etc.), multiple scans with variable rates must also be available. The programming language should be at a level that operators and technicians can easily use.
The main point of configuring the system, is to define the order and format of the data to be recorded, and the frequencies at which the data is read and recorded on tape, disk, and on the chart recorder.
The data acquisition interfaces to the various primary data sources, i.e. EM consoles, magnetometer/compensator consoles and navigation systems, should be multi-channel and multi-port devices which can easily be programmed on/off by the user. Analog inputs should have at least 16 bits of resolution with a wide dynamic range. The analog interface should also have an automatic self calibrating feature.
During data acquisition, the system should supply various modes of monitoring the real-time system performance, error and problem reporting, etc.. These should be both graphic and alphanumeric. The displays should be crisp and easily read by the operator for immediate and possibly post flight interpretation of the system performance.
The survey data that is to be recorded and later transferred to a main computer for processing, should be on a reliable medium that has a sufficient capacity for the flight or project. The recording media should be easily transportable and use a recording format that is a commercial standard.
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