Information gathering using reflected satellite signals
First Claim
1. A method of using reflected satellite signals to determine information comprising the steps of:
- receiving one or more reflected satellite signals from at least one satellite at one or more receivers, said reflected satellite signals being reflected from an object, ground or a combination thereof, prior to reception by said one or more receivers;
determining a power of said one or more reflected satellite signals;
comparing the determined power of said one or more reflected satellite signals to a calibrated value of a power obtained from calibration data for said object, said ground or said combination thereof; and
determining information about said object, said ground, or an area or a location as a result of said comparing step.
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Accused Products
Abstract
A method of using reflected satellite signals, such as GPS signals or high orbit satellite signals, to determine information including the steps of: receiving direct and reflected satellite signals from the same satellite at one or more receivers, comparing a power of said reflected satellite signal with a power of the direct satellite signal from the same satellite to obtain a ratio, comparing the ratio to at least one calibrated ratio obtained from calibration data; and determining information from a result of said step of comparing said ratios. The method is useful for the purpose of determining information about the presence or absence of an object, person or animal, the volume of motor vehicle or foot traffic, the aridity of land, monitoring an area for intruders, monitoring parking lots and enhancing security systems.
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Citations
21 Claims
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1. A method of using reflected satellite signals to determine information comprising the steps of:
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receiving one or more reflected satellite signals from at least one satellite at one or more receivers, said reflected satellite signals being reflected from an object, ground or a combination thereof, prior to reception by said one or more receivers; determining a power of said one or more reflected satellite signals; comparing the determined power of said one or more reflected satellite signals to a calibrated value of a power obtained from calibration data for said object, said ground or said combination thereof; and determining information about said object, said ground, or an area or a location as a result of said comparing step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 21)
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14. A method for processing satellite signals to determine information comprising the steps of:
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receiving a reflected satellite signal at one or more receivers, wherein said reflected satellite signal is reflected from an object, ground or a combination thereof prior to being received at said one or more receivers; comparing a power of said reflected satellite signal to a calibrated value of a power representing said object, said ground or said combination thereof; and determining information about said object, said ground, an area or a location as a result of said comparison step. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification