System for measuring turbulence remotely
First Claim
1. A system for detecting clear air turbulence along a path that is subject to turbulence, the system comprising:
- at least one airborne transmitter to transmit electromagnetic energy along the path; and
at least one receiver located on a mobile platform to receive the electromagnetic energy, the mobile platform moving along the path;
the receiver including;
an antenna responsive to incident electromagnetic energy to produce a received signal;
a first input to accept a velocity signal that is representative of a velocity at which the one of the receiver and the transmitter is moving along the path, a second input to accept a rotational velocity signal indicative of rotational motion of the antenna caused by a corresponding rotational motion of the mobile platform, the receiver adapted to process the received signal using the velocity signal and the rotational velocity signal to remove a shift associated with the received signal because of relative motion between a source of the electromagnetic energy and the mobile platform that is moving along the path, so that the receiver determines an alteration of the electromagnetic energy caused by the turbulence along a path looking toward the source of the electromagnetic signal; and
the receiver is adapted to output a signal that is representative of the turbulence.
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Abstract
A system for detecting turbulence along a path that is subject to turbulence. The system may make use of at least one transmitter to transmit electromagnetic (EM) energy along the path and at least one receiver to receive the EM energy. At least one of the transmitter and the receiver moves along the path. The receiver may have an antenna responsive to incident EM energy to produce a received signal, and an input for accepting a velocity signal indicating a velocity that the receiver or the transmitter is moving. The receiver processes the received signal using the velocity signal to remove a shift associated with the received signal because of relative motion between a source of the EM energy and the receiver or transmitter that is moving along the path. Thus, the receiver determines an alteration of the EM energy caused by the turbulence and outputs a signal indicative of the turbulence.
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Citations
19 Claims
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1. A system for detecting clear air turbulence along a path that is subject to turbulence, the system comprising:
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at least one airborne transmitter to transmit electromagnetic energy along the path; and at least one receiver located on a mobile platform to receive the electromagnetic energy, the mobile platform moving along the path; the receiver including; an antenna responsive to incident electromagnetic energy to produce a received signal; a first input to accept a velocity signal that is representative of a velocity at which the one of the receiver and the transmitter is moving along the path, a second input to accept a rotational velocity signal indicative of rotational motion of the antenna caused by a corresponding rotational motion of the mobile platform, the receiver adapted to process the received signal using the velocity signal and the rotational velocity signal to remove a shift associated with the received signal because of relative motion between a source of the electromagnetic energy and the mobile platform that is moving along the path, so that the receiver determines an alteration of the electromagnetic energy caused by the turbulence along a path looking toward the source of the electromagnetic signal; and the receiver is adapted to output a signal that is representative of the turbulence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for detecting clear air turbulence along a path being traveled by a mobile platform, the system comprising:
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at least one transmitter to transmit electromagnetic energy along the path; and at least one receiver located on the mobile platform to receive the electromagnetic energy as the mobile platform travels along the path; the receiver including; an antenna responsive to incident electromagnetic energy to produce a received signal; a first input to accept a velocity signal that is representative of a velocity at which the one of the receiver and the transmitter is moving along the path, a second input to accept a rotational velocity signal indicative of rotational motion of the antenna caused by a corresponding rotational motion of the mobile platform, the receiver adapted to process the received signal using the velocity signal and the rotational velocity signal to remove a shift associated with the received signal because of relative motion between a source of the electromagnetic energy and the mobile platform that is moving along the path, so that the receiver determines an alteration of the electromagnetic energy caused by the turbulence along the path; and the receiver is adapted to output a signal that is representative of the turbulence; and a processor for processing the signal output from the receiver, the processor further considering at least one of a location and an orientation of the antenna on the mobile platform in generating information relating to the turbulence. - View Dependent Claims (13, 14, 15, 16)
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17. A system for detecting turbulence along a path being traveled by a mobile platform, the system comprising:
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at least one transmitter to transmit electromagnetic energy along the path; and at least one receiver located on the mobile platform to receive the electromagnetic energy as the mobile platform travels along the path; the receiver including; an antenna responsive to incident electromagnetic energy to produce a received signal; an input to accept a velocity signal that is representative of a velocity at which the one of the receiver and the transmitter is moving along the path, the receiver adapted to process the received signal using the velocity signal to remove a shift associated with the received signal because of relative motion between a source of the electromagnetic energy and the mobile platform that is moving along the path, so that the receiver determines an alteration of the electromagnetic energy caused by the turbulence; the receiver adapted to output a signal that is representative of the turbulence; and a processor to receive the output signal and to create a three dimensional model of the turbulence using the output signal. - View Dependent Claims (18, 19)
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Specification