A system including a polarized RF scanning reference source and one or more cavity sensor receivers.

A system including a polarized RF scanning reference source and one or more cavity sensor receivers.

A method for determining angular orientation of an object in two or more directions. The method includes: generating a scanning polarized RF source signal; receiving the scanning polarized RF source signal at one or more cavities of a sensor disposed on the object; measuring the scanning polarized RF source signal at a first portion of the sensor; reflecting the scanning polarized RF source signal toward a second portion of the sensor; measuring the scanning polarized RF source signal at the second portion of the sensor; and determining the angular orientation of the object in the two or more directions based on the measured signal at the first and second portions of the sensor.

A method for determining angular orientation of an object in two or more directions. The method includes: generating a scanning polarized RF source signal; receiving the scanning polarized RF source signal at one or more cavities of a sensor disposed on the object; measuring the scanning polarized RF source signal at a first portion of the sensor; reflecting the scanning polarized RF source signal toward a second portion of the sensor; measuring the scanning polarized RF source signal at the second portion of the sensor; and determining the angular orientation of the object in the two or more directions based on the measured signal at the first and second portions of the sensor.

A method for determining angular orientation of an object in two or more directions. The method includes: generating a scanning polarized RF source signal; receiving the scanning polarized RF source signal at one or more cavities of a sensor disposed on the object; measuring the scanning polarized RF source signal at a first portion of the sensor; reflecting the scanning polarized RF source signal toward a second portion of the sensor; measuring the scanning polarized RF source signal at the second portion of the sensor; and determining the angular orientation of the object in the two or more directions based on the measured signal at the first and second portions of the sensor.

A system including a polarized radio frequency (RF) scanning reference source and one or more cavity sensor receivers. The system uses a sensor processor to apply Fourier integration to extract a fundamental frequency and, at least, a fundamental frequency and two predetermined harmonics from the received output of the one or more cavity sensor receivers in determining a reference time of the reference clock.

A system including a polarized radio frequency (RF) scanning reference source and one or more cavity sensor receivers. The system uses a sensor processor to apply Fourier integration to extract a fundamental frequency and, at least, a fundamental frequency and two predetermined harmonics from the received output of the one or more cavity sensor receivers in determining a reference time of the reference clock.

A cavity sensor including: a body defining a cavity, the cavity having an opening on one end and a closed surface on other end; a reflective surface disposed in the cavity, the reflective surface being angled 45 degrees relative to a propagation direction of an incoming wave through the opening; and first and second angle probes positioned on each of two ends of the reflective surface. Also provided is a cavity sensor including: a body defining a cavity, the body having two or more conduits, each having an opening, the body having a closed surface opposing the openings, and a probe positioned in the cavity at a position common to each of the two or more conduits.

A cavity sensor including: a body defining a cavity, the cavity having an opening on one end and a closed surface on other end; a reflective surface disposed in the cavity, the reflective surface being angled 45 degrees relative to a propagation direction of an incoming wave through the opening; and first and second angle probes positioned on each of two ends of the reflective surface. Also provided is a cavity sensor including: a body defining a cavity, the body having two or more conduits, each having an opening, the body having a closed surface opposing the openings, and a probe positioned in the cavity at a position common to each of the two or more conduits.

A remote control apparatus includes: a main controller, a wireless transmission chip, a gyroscope chip and an operating device; wherein the wireless transmission chip is electrically connected with the main controller; the gyroscope chip is electrically connected with the main controller; the operating device is electrically connected with the main controller. The gyroscope chip is used for detecting an inclination angle of the remote control apparatus relative to a horizontal plane, and sending a first electric signal representing a positioning status of the remote control apparatus to the main controller. The main controller is used for detecting an input level when the operating device is operated by an operator, and sending a second electric signal representing a movement direction instructed by the operating device to the wireless transmission chip. The wireless transmission chip transmits the second electric signal to an external device.