Step frequency ISAR
AssigneeThe United States of America 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.