Abstract: SAFELANDER provides a method of safely operating aircraft, equipped with a Flight Control Unit, Instrument Landing System, and Autopilot, remotely on the ground and/or in congested airspace. The remote pilot, who can concurrently control a plurality of operational aircraft, communicates with Air Traffic Control and operates in a secure, synthetic vision, high fidelity, virtual reality cockpit simulator located in a ground-based facility. The patent saves cost and weight by providing a method for safely piloting traditionally dual piloted operational aircraft with just a single onboard pilot. The invention protects aircraft, edifices and the population from pilot error and/or terrorists. Decreases cost of air travel. Quickly, safely and effectively responds to emergencies. Increases flight safety and security. SAFELANDER ciphers and utilizes the two-way RF ground to aircraft and aircraft to ground telecommunication links and critical aircraft flight control data of U.S. Pat. No.

Abstract: A low-cost, portable, strap-down, navigation system including: an Inertial Navigation System (INS); a GPS receiver; and a 3-Axis Magnetometer (MAG). A microprocessor controls and filters the data from the INS, GPS and MAG. In a preferred embodiment the system provides an indication of: True Heading; 3-D Position; 3-D Velocity; 3-D Acceleration; 3-D Attitude; and 3-D Angular Rate. A filter weighs the trustworthiness of each sensor, favoring the GPS and MAG sensors for relatively low rate movements and steady state conditions and the INS sensors for transient movements.

Abstract: This invention is a system that monitors many performance parameters and many aircraft operational parameters, and broadcasts this information along with aircraft identification, audio, video, global positioning and altitude data, to a world wide two-way rf network. This information is monitored and recorded at a remote, centralized location. At this location, this information is combined with archived data, ATC data, weather data, topological data, map data, and manufacturers' data. Analysis of this combined data allows identification of problems and generation of advisories. Six types of advisories are generated: maintenance, safety of flight, flight efficiency, flight separation, safe to fly and safe to take off. In the event of a crash the remotely recorded data provides an instant indication of the cause of the crash as well as where the crashed plane can be found. Use of this invention allows replacement of the current, on-board flight data recorders thus saving costs and weight.

Abstract: This invention is a system that monitors many performance parameters and many aircraft operational parameters, and broadcasts this information along with aircraft identification, audio, video, global positioning and altitude data, to a world wide two-way rf network. This information is monitored and recorded at a remote, centralized location. At this location, this information is combined with archived data, ATC data, weather data, topological data, map data, and manufacturers' data. Analysis of this combined data allows identification of problems and generation of advisories. Six types of advisories are generated: maintenance, safety of flight, flight efficiency, flight separation, safe to fly and safe to take off. In the event of a crash the remotely recorded data provides an instant indication of the cause of the crash as well as where the crashed plane can be found. Use of this invention allows replacement of the current, on-board flight data recorders thus saving costs and weight.

Abstract: A holographic optical element (HOE) includes a substrate structure having rotational symmetry with respect to a rotational axis for rotatively supporting at least two holograms. A first hologram on the substrate structure in the path of a normally incident beam diffracts the beam by a first acute angle and in a first radial direction from the rotational axis to a first redirected path. A second hologram on the substrate structure in the first redirected path diffracts the beam by a different second acute angle and in an opposite second radial direction from the rotational axis to a second redirected path. As a result, the two holograms may be used to achieve a second redirected path at an angle to the rotational axis that has a size which is the difference between the size of the first angle and the size of the second angle.

Abstract: A star tracker for generating positional information for a vehicle includes a holographic telescope (150) having one or more fields of view for imaging stellar objects. The telescope includes a plurality of radiation detectors (100) and an input aperture comprised of a primary holographic optical element (HOE) (134). The primary HOE provides one or more wavefronts to one or more secondary HOEs (136), each of which applies a chromatic correction so as to correct for a chromatic aberration induced by the primary HOE. A single or multiple field of view Schmidt telescope embodiment is also disclosed having one or more aspheric corrector plate HOEs and one or more associated concave spherical reflectors.

Abstract: A star tracker for generating positional information for a vehicle includes a telescope 40 having multiple fields of view for imaging stellar objects. The telescope includes a plurality of radiation detectors 58 and an input lens 45 comprised of, in one embodiment of the invention, a plurality of holographic elements 45a and 45b. The holographic elements direct incident radiation originating from a plurality of stellar objects to an associated one of the radiation detectors. In another embodiment the multiple field of view telescope is comprised of a monocentric ball lens 80. The tracker may further include a multiplexer 60 for sequentially reading out a signal from each of the radiation detectors and a controller 62 coupled to the multiplexer for receiving the signals and for determining from the positions of the stellar objects imaged by the telescope a position of the vehicle.

Abstract: Apparatus and a method for detecting deflections along the length of a pipeline. A plurality of measurements of inertial attitude are made along the length of the pipeline over time by means of apparatus, including sensors, associated with a pipeline pig. Thereafter, by comparing a time sequence of such measurements, points of flexure are accurately located and identified.

Abstract: In a stabilized gyrocompass having meridian seeking gyroscopic means and slaved horizontal gryoscopic means disposed upon a common platform, a signal representative of the angle which develops between the meridian seeking gyro and the platform in response to the dynamic effects of the vehicle is generated. The generated angle is proportional to the northerly inertial velocity term and is used to control the platform in azimuth, thereby providing a dynamically correct stabilized gyrocompass without the use of accelerometers or gravity sensors which are conventional in the art.

Abstract: The synthesis of 1RS,4SR,5RS-4-(4,8-dimethyl-5-hydroxy-7-nonen-1-yl)-4-methyl-3,8-dioxabicy clo[3.2.1]octane-1-acetic acid is described. The bicyclo acetic acid compound is useful as a uteroevacuant agent.

Abstract: A portable gyroscopic compass surveying device includes means for rapidly aligning the apparatus with respect to geographic north, the north finder itself being operated apart from the associated theodolite on its own low mount. The transfer of the azimuth reference data is accomplished optically by sighting the theodolite telescope on a retro-reflector associated with the north finder. Because the north finder is physically separated from the theodolite, sightings may be made by the theodolite operator while the undisturbed north seeking operation is in process, significantly shortening the total time of operation at each station.

Abstract: The synthesis of 1RS,4SR,5RS-4-(4,8-dimethyl-5-hydroxy-7-nonen-1-yl)-4-methyl-3,8-dioxabicy clo[3.2.1]octane-1-acetic acid is described. The bicyclo acetic acid compound is useful as a uteroevacuant agent.

Abstract: An improved earth's magnetic field sensing compass utilizes a flat, toroidal flux valve in which pickoffs sense mutually perpendicular components of the magnetic field and the fields are nulled by the closed loop feed back of nulling currents into respective pairs of the sensor pickoffs.

Abstract: Substituted pyrrolo[1,2-c] quinazolines useful for their cardiovascular activities and as antiasthmatic agents.

Abstract: A d.c. load is energized through a full wave bridge circuit from an a.c. source in accordance with a d.c. control signal. The d.c. control signal is modulated so as to produce a train of unipolar pulses having pulse widths proportional to the magnitude of the d.c. control signal and synchronized so that the midpoints of successive pulses occur at the peaks of successive half cycles of the a.c. source voltage. A steering network couples the modulated width pulses to either a first or second transistor means in the bridge circuit depending upon the polarity of the d.c. control signal. The selected transistor means is saturated throughout the occurrence of an applied modulated width pulse and arranged so that energizing current is passed through the load in a forward or reverse direction, respectively, depending upon which of the transistor means is actuated.

Abstract: Novel azabicyclic compounds useful for their central nervous system depressant and cardiovascular activity, methods for preparing same, and intermediates.

Abstract: An internally threaded igniter tube is threadably attached to a boss on the projectile base. In order to withstand ramming, a diametral flange at the base of the round engages a shoulder on the propellant so that when the igniter is in the assembled position, the midsection area is loaded in tension while the forward threaded section is loaded in shear. This arrangement produces superior ballistic properties by permitting the ballistic shot-start to be low enough to insure early motion while at the same time having the ability to withstand relatively high impact loads.

Abstract: This invention is a system that monitors many performance parameters and many aircraft operational parameters, and broadcasts this information along with aircraft identification, audio, video, global positioning and altitude data, to a world wide two-way rf network. This information is monitored and recorded at a remote, centralized location. At this location, this information is combined with archived data, ATC data, weather data, topological data, map data, and manufacturers' data. Analysis of this combined data allows identification of problems and generation of advisories. Six types of advisories are generated: maintenance, safety of flight, flight efficiency, flight separation, safe to fly and safe to take off. In the event of a crash the remotely recorded data provides an instant indication of the cause of the crash as well as where the crashed plane can be found. Use of this invention allows replacement of the current, on-board flight data recorders thus saving costs and weight.