Abstract: An apparatus for testing an optical surface comprising an array of holograms. The array includes a plurality of individual holograms arranged in an M×N format, in which M is the number of rows and N is the number of columns in the array. The array of holograms is positioned between the optical surface and a wavefront sensor. The array of holograms reflects a reference beam back to the wavefront sensor, and transmits a test beam to the optical surface. The array of holograms also receives the test beam reflected from the optical surface and transfers the test beam back to the wavefront sensor.

Abstract: A line scanner scans in a cross track direction and moves forward on a platform in an along track direction. The line scanner includes a plurality of detectors forming a left array and a plurality of detectors forming a right array. The left array and the right array are tilted away from a line formed in the along track direction. The left array is configured to detect scene radiance from a surface of an object when the line scanner is scanning the surface on the right side of the line formed in the along track direction. The right array is configured to detect scene radiance from the surface of the object when the line scanner is scanning the surface to the left side of the line formed in the along track direction. The detectors in each respective array are configured to simultaneously detect the scene radiance.

Abstract: A method of adaptive downsampling includes the steps of: (a) receiving input data having a first spatial resolution and a first grid spacing; (b) resampling the input data using an automatically adjustable kernel; and (c) providing output data having a second spatial resolution and a second grid spacing. The second spatial resolution, advantageously, is substantially constant across the second grid spacing. The input data may include image data, and the output data may include resampled, or downsampled image data. The image data may be images of the Earth at a first spatial resolution and a first grid spacing; the output data may be resampled data of the images of the Earth at a second spatial resolution and a second grid spacing.

Abstract: A method, program product, and apparatus are provided to correlate operation of a first system and a second system. A first set of metrics are generated for a first set of data produced during operation of the first system. A second set of metrics are generated that correspond to each of metrics in the first set of metrics from a second set of data produced during operation of the second system. A correlation score is computed for the first and second systems based on differences between the first set of metrics and the second set of metrics. The first set of metrics, the second set of metrics, and the correlation score are presented on the display to indicate a similarity of operation of the first and second systems.

Abstract: A sensor cup has a tube with lateral sides, a distal end with a base coupled to the liner of a tank, and an opposite proximal open end. A composite laminate surrounds a circumference and the lateral sides of the tube. A connection is associated with the tube. A sensor is disposed in the tube and retained therein by the connection. A flange can extend radially outwardly from the cylindrical tube at the distal end with the flange coupled to the liner. The composite laminate can cover the flange with the flange sandwiched between the composite laminate and the liner.

Abstract: A system for detection of eye nystagmus in a test subject includes a camera to capture digital images in a series of sequential digital image frames of the test subject's face when the camera is located a selected distance from the test subject, and an analyzer. The analyzer includes a memory configured to store data, and a processor. The processor is configured with logic to detect and track eye movements of the test subject based upon an analysis of digital image frames captured by the camera, where eye movements are tracked via analysis of a plurality of the captured digital image frames on a sequential frame-by-frame basis. The processor is further configured with logic to provide an indication regarding whether the test subject exhibits nystagmus based upon the eye movement detection and tracking.

Abstract: According to an embodiment of the present invention, geolocations of multiple unknown radio frequency (RF) signal sources are determined using three-dimensional (3-D) geolocation techniques. The three-dimensional (3-D) geolocation techniques obtain reliable geolocation estimates of radio frequency (RF) emitters based on energy or received signal strength (RSS) of emitter transmitted signals and based on their time differences of arrival (TDOAs) at various sensor locations. The energy based geolocations and the time difference of arrival (TDOA) geolocations are combined to determine an overall set of geolocations for multiple unknown radio frequency (RF) signal sources. The geolocation information is used to track and monitor the locations of the multiple emitters.

Abstract: According to an embodiment of the present invention, a three-dimensional (3-D) energy-based emitter geolocation technique determines the geolocation of a radio frequency (RF) emitter based on energy or received signal strength (RSS) of transmitted signals. The technique may be employed with small unmanned air vehicles (UAV), and obtains reliable geolocation estimates of radio frequency (RF) emitters of interest.

Abstract: An air and moisture separator for use with a waste tank and a vacuum source has a canister securable to the waste tank and having an inlet couplable to the waste tank and an outlet couplable to the vacuum source. An air flow path extends through the canister and through at least three different stages of air and moisture separation, including: a first air-turning stage coupled to the inlet; and a second stage of mesh or foam coupled to and subsequent to the first air-turning stage in the air flow path. An annular mesh or foam of greater density defines a third stage subsequent to the second stage, and circumscribes at least a majority of a circumferential perimeter of the mesh or foam of the second stage.

Abstract: A system for processing a multiband image, including digital computer memory for storing a multiband image having multiple bands of image data; and processing circuitry for processing the multiband image, wherein the processing circuitry (a) determines pixel locations in the bands of the multiband image having values above the band-specific white value threshold for each of the bands of the multiband image, (b) determines a band-specific correction factor for each of plural bands of the multiband image based on the determined pixel locations, and (c) applies the corresponding band-specific correction factor to the respective plural bands of the multiband image to produce a corrected image.

Abstract: A brightness tracking system for an optical device includes a first imager for viewing a target of interest, a second imager for viewing the same target of interest, and a photodiode circuit. The photodiode circuit (a) measures brightness levels of the target of interest received from the first imager, and (b) controls output brightness of the second imager, based on the measured brightness levels received from the first imager.

Abstract: A night vision goggle system includes a housing, and an eyepiece forming a back end of the housing for viewing an object of interest. An optical field-of-view (FOV) is formed through the eyepiece, where the FOV is defined by a cone having an apex formed adjacent to an exit pupil at the eyepiece and tapering outwardly toward the object of interest. A desiccant is disposed within the housing, and located outside the FOV. The desiccant is visible through the eyepiece when viewed from outside the FOV. In addition, when the eye of a user is placed within the FOV, the desiccant is not visible through the eyepiece; and when the eye of the user is placed outside the FOV, the desiccant is visible through the eyepiece.

Abstract: A combination firmware and hardware cryptographic core architecture is provided for encrypting, decrypting and authenticating data. The core provides flexibility to change and add new cryptographic protocols, while providing increased performance by loading new firmware into a microcontroller that programs behavior of various components in the core. The core combines a microcontroller programmable by firmware, and flexible aligner, insertion and removal controllers programmed by the microcontroller that process, manage and manipulate an incoming data stream as it moves through the core. The firmware may be reprogrammed upon an enhancement or change to a protocol while still realizing performance benefits of the hardware. Reprogramming the microcontroller allows it to change the way the aligner, insertion and removal controllers manipulate the data stream as it enters various components.

Abstract: Methods and systems provide a USB memory stick protected by an attached CIK. This system includes a USB memory stick composed of a main body and a cap. The main body houses the memory for data storage as well as the encrypt/decrypt device and ancillary circuitry. The cap houses the CIK, simultaneously providing a storage mechanism for the CIK as well as keeping the CIK obscured from plain view and visual detection.

Abstract: Sensor data indicative of a user's environment is received from a sensor. A video signal is generated which comprises a visual representation of the sensor data. The video signal is combined with a night vision view of the user's environment to overlay the visual representation of the sensor data over the nigh vision view of the user's environment. The overlaid night vision view of the user's environment is displayed to the user.

Abstract: A tandem electron multiplier device includes an input end position electron multiplier generating an electron emission; an output end position electron multiplier receiving the electron emission and generating an output electron emission; an electron collector to receive the output electron emission; a power supply; and an electrical biasing network coupled to the power supply, the electrical biasing network supplying voltages to connections at the input end position electron multiplier and the output end position electron multiplier, the voltages supplied to provide output current linearly with respect to input current across the tandem electron multiplier device.

Abstract: The present invention includes a head mounted display (HMD) worn by a user. The HMD includes a display projecting an image through an optical lens. The HMD also includes a one-dimensional retro reflective array receiving the image through the optical lens at a first angle with respect to the display and deflecting the image at a second angle different than the first angle with respect to the display. The one-dimensional retro reflective array reflects the image in order to project the image onto an eye of the user.

Abstract: A technique for equalizing a distributed pilot OFDM signal with decision feedback involves correlating a received OFDM signal against a pilot reference to obtain a coarse channel estimate, where the received OFDM signal includes a distributed pilot signal and an OFDM data signal. The received OFDM signal is equalized based on the coarse channel estimate and the distributed pilot signal is removed to generate a coarse data signal estimate. The coarse data signal estimate is removed from the received OFDM signal using the coarse channel estimate to generate a residual pilot signal. The residual pilot signal can then be correlated against the pilot reference to obtain a fine channel estimate. The received OFDM signal is equalized based on the fine channel estimate, and the distributed pilot signal is removed to produce a fine data signal estimate from which data is recoverable.

Abstract: An optical device includes a housing enclosure, a lens cell holder mounted to the housing enclosure by a retainer, a lens assembly mounted to the lens cell holder such that the lens assembly is configured to translate in an axial direction; and a radial space defined between the lens cell holder and the retainer that is sized to accommodate adjustment of the lens cell holder and the lens assembly in a radial direction with respect to the housing enclosure. A method of adjusting a line of sight of the optical device includes (i) positioning the lens assembly against the housing enclosure; (ii) adjusting the radial position of the lens assembly until a pre-determined line of sight requirement is achieved; and (iii) fixing the lens assembly to the housing enclosure of the optical device to preserve the radial position of the lens assembly with respect to the housing enclosure.

Abstract: A vehicle power system including an unregulated alternator; a saturable reactor receiving an output AC voltage from the alternator and generating a reduced AC voltage in response to a bias signal; and an active rectifier rectifying the reduced AC voltage to a DC voltage.