Step frequency isar
AssigneeU.S.A. as represented by the Administrator of the National Aeronautics and Space Administration
InventorManohar D. Deshpande
Life of this patent
Estimating the term…
Abstract
A step frequency inverse synthetic aperture radar (ISAR) includes a transmitter configured to transmit a transmission pulse at a transmission frequency to a near earth object (NEO), the transmission frequency having a frequency range comprising a starting frequency, an ending frequency, and a step size; a receiver configured to receive a pulse response from the NEO, the pulse response corresponding to the transmission pulse; and a computer configured to determine a 3-dimensional image of the interior of the NEO from the pulse response.
Claims20
A step frequency inverse synthetic aperture radar (ISAR) comprising:
- a transmitter configured to transmit a transmission pulse at a transmission frequency to a near earth object (NEO), the transmission frequency having a frequency range comprising a starting frequency, an ending frequency, and a step size;
- a receiver configured to receive a pulse response from the NEO, the pulse response corresponding to the transmission pulse;
- and
- a computer configured to determine a 3-dimensional image of the interior of the NEO from the pulse response.
A method of operating a step frequency inverse synthetic aperture radar (ISAR), the method comprising:
- transmitting a transmission pulse at a transmission frequency to a near earth object (NEO), the transmission frequency having a frequency range comprising a starting frequency, an ending frequency, and a step size;
- receiving a pulse response from the NEO, the pulse response corresponding to the transmission pulse;
- and
- determining a 3-dimensional image of the interior of the NEO from the pulse response.
An ionospheric sounder comprising a step frequency inverse synthetic aperture radar (ISAR), the step frequency ISAR comprising:
- a transmitter configured to transmit a transmission pulse at a transmission frequency to the earth's ionosphere, the transmission frequency having a frequency range comprising a starting frequency, an ending frequency, and a step size;
- a receiver configured to receive a pulse response from the earth's ionosphere, the pulse response corresponding to the transmission pulse;
- and
- a computer configured to determine a 3-dimensional image of an electron density of the earth's ionosphere from the pulse response.
Dependencies are inferred from the claim text.