An airborne communication device installed in a vehicle, wherein the airborne communication device is configured to receive navigation information from a ground-based communication device installed outside the vehicle via a datalink protocol. A ground-based communication device, a communication system, and a method for communication are described.

A method, medium and system for auto-aligning displays of a head/helmet mounted display. The method, medium and system may provide for an auto-alignment of components of a headband, headgear, or a helmet. The method, medium and system may provide for a first sensor mounted to the helmet of a user and configured to communicate and transfer align with a vehicle comprising an inertial navigation system (INS). The method, medium and system may provide for display comprising a second sensor configured to communicate with the first sensor and transfer align the second sensor with the first sensor based on the transfer alignment of the first sensor with the vehicle. The method, medium and system may provide for wherein the first sensor and the second sensor comprise an inertial measurement unit (IMU). Further, the method, medium and system may also provide for the aligning of two displays on the head/helmet relative to each other in real time.

A method, medium and system for auto-aligning displays of a head/helmet mounted display. The method, medium and system may provide for an auto-alignment of components of a headband, headgear, or a helmet. The method, medium and system may provide for a first sensor mounted to the helmet of a user and configured to communicate and transfer align with a vehicle comprising an inertial navigation system (INS). The method, medium and system may provide for display comprising a second sensor configured to communicate with the first sensor and transfer align the second sensor with the first sensor based on the transfer alignment of the first sensor with the vehicle. The method, medium and system may provide for wherein the first sensor and the second sensor comprise an inertial measurement unit (IMU). Further, the method, medium and system may also provide for the aligning of two displays on the head/helmet relative to each other in real time.

Provided is a two axis test fixture, which can include systems and associated methods. Some methods described also include implementing and/or controlling a two-axis test fixture. Systems and computer program products are also provided. A test fixture is used to test, calibrate, or validate an IMU. The test fixture is operable to rotate a device under test (e.g., IMU) along two axes while mounted to a turntable. The rotation of the turntable is enabled via multiple slip rings, rotational bearings, and standoff fixtures. Testing of the device along greater than two axes is achieved through rotation of the device under test on the turntable, and revolutions of the device under test about an axle.

Methods and systems are provided for indicating the relationship of a displayed area on a map with respect to a route or flight plan. A method comprises displaying a navigational map on a display device and displaying a graphical adjustment element on the display device. The position of the graphical adjustment element on the display device corresponds to the along track distance between the displayed area of the navigational map and a first navigational reference point of a route comprising the first navigational reference point and a second navigational reference point.

The present disclosure relates to a method for locating a first mobile terminal, the method including obtaining of at least one route of the first mobile terminal, defined by at least: a departure point, representative of a geographical location of the first mobile terminal; an arrival point, representative of a determined geographical location. According to at least one embodiment, the obtaining includes at least: an establishment of a communication between the first terminal and a second terminal, at an instant which is a function of a determined timestamp; a provision of the geographical location of the first terminal and/or a geographical location of the second terminal during the communication. The present disclosure also relates to the corresponding terminals, vehicles, computer program product and storage media.

The present disclosure relates to a method for locating a first mobile terminal, the method including obtaining of at least one route of the first mobile terminal, defined by at least: a departure point, representative of a geographical location of the first mobile terminal; an arrival point, representative of a determined geographical location. According to at least one embodiment, the obtaining includes at least: an establishment of a communication between the first terminal and a second terminal, at an instant which is a function of a determined timestamp; a provision of the geographical location of the first terminal and/or a geographical location of the second terminal during the communication. The present disclosure also relates to the corresponding terminals, vehicles, computer program product and storage media.

Calibrating an unstable sensor of a mobile device. Systems and methods for calibrating a sensor of a mobile device determine a first estimated position of the mobile device without using any measurement from the sensor of the mobile device, generate a second estimated position of the mobile device using a measurement from the sensor, estimate a sensor error of the sensor using the first estimated position and the second estimated position, and use the sensor error to determine a calibration value for adjusting one or more measurements from the sensor.

Calibrating an unstable sensor of a mobile device. Systems and methods for calibrating a sensor of a mobile device determine a first estimated position of the mobile device without using any measurement from the sensor of the mobile device, generate a second estimated position of the mobile device using a measurement from the sensor, estimate a sensor error of the sensor using the first estimated position and the second estimated position, and use the sensor error to determine a calibration value for adjusting one or more measurements from the sensor.

In a behavior measurement device (20a) (information processing device), a linear movement detection unit (44) determines, based on a position (P) of a user (90) measured at a predetermined time interval, whether or not the user (90) is linearly moving and detects a movement amount and a movement direction (θ.sub.0) of a linear movement of the user (90). A rotational movement detection unit (42) detects an amount of change in an orientation of the user (90). Then, in a case where it is determined that the user (90) is linearly moving, an orientation calculation unit (43) calculates an orientation (θ) of the user (90) at a position where the user (90) is determined to be linearly moving based on a detection result of the rotational movement detection unit (42).