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I compared all of Galileo's angular measurements with the reconstructed elongations, obtained using TheSky 6 Professional Edition.
Systems using this technique typically provide on the order of 1 [degree] RMS angular measurement accuracy.
An azimuth is a term from geometry referring to an angular measurement in a spherical coordinate system commonly used in engineering, mapping, astronomy, navigation and artillery.
The LDS electronic autocollimator is for non-contact angular measurement and alignment tasks for laboratory and industrial settings.
ABE is a gyro-stabilized, electro-optical angular measurement system designed to align systems on any land, sea or air vehicle prior to mission execution.
Available in 12 individual models per series, with angular measurement ranges from [+ or -]3[degrees] to [+ or -]90[degrees], and choices of single axis (SX41200) and twin axis (SX41400) versions, their design incorporates a galvanometric pendulum sensing element with hydromechanical damping, combined with an optical position sensor, with 4-20 mA or [+ or -]5 VDC ([+ or -]5 percent) output, proportional to sine of the angle of tilt.
The answer, researchers found, lay in using lightweight materials and miniaturizing the sensors, which fall into two categories: angular measurement systems that are based on magnetic principles; and acceleration and rate-of-rotation sensors.
The LDS electronic autocollimator, for non-contact angular measurement and alignment tasks, is a calibrated measurement tool that offers quick set-up and ease of use, and provides a cost-effective solution in a portable package.
As shown in Figure 1, the location accuracy is a function of both angular measurement error and distance to the emitter being measured.