A survey system is provided which includes a surveying instrument capable of performing distance and angle measurements of a target attached to a pole, a controller as a glove-shaped wearable device to be worn on a hand of a worker, and configured to transmit commands to the surveying instrument from an input unit for inputting commands, and an eyewear device capable of performing display superimposed on a landscape. Measurement points are displayed by being synchronized with and superimposed on a landscape of a survey site on the eyewear device, and by inputting a command by a worker from the glove-shaped controller that the worker wears into the surveying instrument while the worker grips the pole, distance and angle measurements of the target are made. Unnecessary turning of gaze and hand movements are omitted, and a survey work can be efficiently performed by the worker alone.

A survey system is provided which includes a surveying instrument capable of performing distance and angle measurements of a target attached to a pole, a controller as a glove-shaped wearable device to be worn on a hand of a worker, and configured to transmit commands to the surveying instrument from an input unit for inputting commands, and an eyewear device capable of performing display superimposed on a landscape. Measurement points are displayed by being synchronized with and superimposed on a landscape of a survey site on the eyewear device, and by inputting a command by a worker from the glove-shaped controller that the worker wears into the surveying instrument while the worker grips the pole, distance and angle measurements of the target are made. Unnecessary turning of gaze and hand movements are omitted, and a survey work can be efficiently performed by the worker alone.

Head-mounted see-through displays and methods are provided which improve helicopter displays and provide more relevant information to the pilot while reducing the information load on the display. Displays comprise a peripheral pilot-scene pitch indication region, indicating scene orientation information according to an orientation of the pilot's head with respect to the scene, a propulsion state indication region, indicating rotor and engines states with respect to their nominal operation states by presenting only deviations of the rotor and engines states from their nominal operation states, a speed indication region, indicating, in association with displayed air speed, a calculated ground speed or a calculated ground speed component in a direction of propagation and a helicopter pitch indication region displaying a pitch ladder which is re-arranged to space close pitch lines and crowd remote pitch lines.

Head-mounted see-through displays and methods are provided which improve helicopter displays and provide more relevant information to the pilot while reducing the information load on the display. Displays comprise a peripheral pilot-scene pitch indication region, indicating scene orientation information according to an orientation of the pilot's head with respect to the scene, a propulsion state indication region, indicating rotor and engines states with respect to their nominal operation states by presenting only deviations of the rotor and engines states from their nominal operation states, a speed indication region, indicating, in association with displayed air speed, a calculated ground speed or a calculated ground speed component in a direction of propagation and a helicopter pitch indication region displaying a pitch ladder which is re-arranged to space close pitch lines and crowd remote pitch lines.

There is provided a surveying instrument including a tripod which is installed on an installation surface and a surveying instrument main body which is provided on the tripod and laterally rotatable around a longitudinal axis, wherein the tripod includes a reference leg has a known relationship between a lower end of the reference leg and a machine reference point which is a machine center of the surveying instrument main body, and two auxiliary legs, the reference leg is installed in such a manner that a lower end of the reference leg coincides with a reference point, wherein the surveying instrument main body calculates a position of the machine reference point with respect to the reference point based on the positional relationship between the lower end of the reference leg and the machine reference point.

There is provided a surveying instrument including a tripod which is installed on an installation surface and a surveying instrument main body which is provided on the tripod and laterally rotatable around a longitudinal axis, wherein the tripod includes a reference leg has a known relationship between a lower end of the reference leg and a machine reference point which is a machine center of the surveying instrument main body, and two auxiliary legs, the reference leg is installed in such a manner that a lower end of the reference leg coincides with a reference point, wherein the surveying instrument main body calculates a position of the machine reference point with respect to the reference point based on the positional relationship between the lower end of the reference leg and the machine reference point.

There is provided a surveying instrument including a tripod which is installed on an installation surface and a surveying instrument main body which is provided on the tripod and laterally rotatable around a longitudinal axis, wherein the tripod includes a reference leg has a known relationship between a lower end of the reference leg and a machine reference point which is a machine center of the surveying instrument main body, and two auxiliary legs, the reference leg is installed in such a manner that a lower end of the reference leg coincides with a reference point, wherein the surveying instrument main body calculates a position of the machine reference point with respect to the reference point based on the positional relationship between the lower end of the reference leg and the machine reference point.

There is provided a surveying instrument including a tripod which is installed on an installation surface and a surveying instrument main body which is provided on the tripod and laterally rotatable around a longitudinal axis, wherein the tripod includes a reference leg has a known relationship between a lower end of the reference leg and a machine reference point which is a machine center of the surveying instrument main body, and two auxiliary legs, the reference leg is installed in such a manner that a lower end of the reference leg coincides with a reference point, wherein the surveying instrument main body calculates a position of the machine reference point with respect to the reference point based on the positional relationship between the lower end of the reference leg and the machine reference point.

Head-mounted see-through displays and methods are provided which improve helicopter displays and provide more relevant information to the pilot while reducing the information load on the display. Displays comprise a peripheral pilot-scene pitch indication region, indicating scene orientation information according to an orientation of the pilot's head with respect to the scene, a propulsion state indication region, indicating rotor and engines states with respect to their nominal operation states by presenting only deviations of the rotor and engines states from their nominal operation states, a speed indication region, indicating, in association with displayed air speed, a calculated ground speed or a calculated ground speed component in a direction of propagation and a helicopter pitch indication region displaying a pitch ladder which is re-arranged to space close pitch lines and crowd remote pitch lines.

In a first aspect, the angular rate sensor comprises a substrate and a rotating structure anchored to the substrate. The angular rate sensor also includes a drive mass anchored to the substrate and an element coupling the drive mass and the rotating structure. The angular rate sensor further includes an actuator for driving the drive mass into oscillation along a first axis in plane to the substrate and for driving the rotating structure into rotational oscillation around a second axis normal to the substrate; a first transducer to sense the motion of the rotating structure in response to a Coriolis force in a sense mode; and a second transducer to sense the motion of the sensor during a drive mode. In a second aspect the angular rate sensor comprises a substrate and two shear masses which are parallel to the substrate and anchored to the substrate via flexible elements.