Abstract: A system for the simultaneous storage of a plurality of components of data signals and for the retrieval and the processing thereof. The system includes a signal source coupled to a record unit that is synchronized by a record controller. A plurality of cathode ray tubes and optical imaging means are included in the record unit for storing the plurality of simultaneously occurring input signal components on a photographic film in an interleaved pattern. A single readout device scans the film in a direction transverse to the record pattern to develop read signals which are processed by a readout processor and an analyzer and then displayed on a display unit. The readout unit synchronizes the readout processor, the analyzer and the display unit.

Abstract: To permit use of a circuit in which the energy derived during horizontal flyback is used to control vertical deflection, without damage to the vertical deflection system upon vertical flyback, the vertical deflection output stage is dimensioned to have a time constant which is less, preferably about half, of the time constant of the sawtooth wave generator controlling vertical deflection. The vertical deflection output stage forms, in essence, a parallel oscillatory circuit which, to provide the lesser time constant, is damped.

Abstract: A device for suppressing autocorrelation sidelobes in a pseudo-random coded radar system employing a phase-coded CW signal in which the phase code is preselected to have a predetermined symmetry. Autocorrelation is affected in the standard manner and also in respect to the transmitted code shifted by one bit in time. Summation of the two autocorrelation functions provides a new autocorrelation function in which the sidelobes between main correlation peaks are suppressed.

Abstract: Apparatus and method for controlling the operation of a range gate generator used in a pulse radar is shown. In accordance with the disclosure, the position of the range gate, or gates, out of the range gate generator is controlled from pulse to pulse primarily in accordance with the Doppler velocity of a selected target and the pulse repetition interval of the pulse radar with a periodic correction in accordance with the range of such target.

Abstract: A transmitter for transmitting a desired signal composed of a carrier modulated by a pseudorandom noise code and periodic bursts of data and a receiver including null steering apparatus wherein the desired signal is applied to a demodulator for removing the PN code, or collapsing the spectrum of the signal, and the collapsed signal is demodulated to provide the data and the carrier, after which the carrier is remodulated with the PN code to provide a reference signal between bursts of data for the null steering apparatus to form a lobe in the antenna pattern in the direction of reception of the desired signal.

Abstract: Disclosed is a system for locating a transmitter arranged for transmitting frequency-modulated signals. The system supplies data about the angular deviation between the direction of the transmitter considered from a reference point and a reference axis passing through that point and comprises two antennas disposed on the reference axis symmetrically relative to the reference point, and a receiver having two mixers which receive, on the one hand, the respective signals from the two antennas through time delay elements and, on the other hand, the signal from one of the antennas through a circuit which provides, during a given period of time, a linear phase shift. The beat frequencies at the mixer outputs are measured by frequency meters during said time period and the desired information is given by the relative deviation between the output signals of the two frequency meters.

Abstract: This disclosure deals with the use of groups of unambiguous radio-frequency pulse transmissions for Loran C and similar radio navigation, eliminating cycle-selection ambiguity and reducing the required power level for transmission.

Abstract: A height finding arrangement for a range/azimuth surveillance radar using a mechanically rotated planar antenna array. The received outputs from the array are combined with suitable weighting functions to give two sectorial pattern signals whose effective phase centers are respectively above and below the center of the array aperture. The phase difference between these two signals is measured to provide the elevation angle of the target.

Abstract: The matched filter target acquisition radiometric system employs a composite scanning system in searching, acquiring, and tracking relatively small targets on a background of large-magnitude, widely-fluctuating-noise generating terrain. Search for a target is accomplished by a combined circular and conical scan antenna system that generates characteristic invariant wave forms when the circularly symmetric antenna pattern sweeps across a target, patterns that are readily recognized by a matched filter signal processing system, thereupon shifting operation of the antenna control system to a conical scan automatic tracking mode.

Abstract: A ranging system for guiding moving objects over equidistant tracks comprises a ground station and airborne equipment. The ground station includes a receiver and a transmitter connected to each other and to an aerial.

Abstract: LORAN-C navigation equipment is disclosed wherein digital circuitry is used to automatically distinguish a master LORAN-C transmitting station from a secondary station. The equipment operator manually enters approximate time difference of signal arrival information for a particular secondary station into the equipment after consulting a LORAN-C chart. The operator then manually determines the exact time difference of arrival using thumbwheel switches and a LED lamp display. This procedure is repeated to determine exact time difference of arrival information for the master and each selected secondary station, and the information is plotted in a well-known manner on the LORAN-C chart to locate the position of the craft upon which the equipment is located. Manual acquisition of secondary stations simplifies the equipment and eliminates interference problems caused by skywaves and other transmissions.

Abstract: A vertical deflection system for a television receiver produces a sawtooth wave signal of a high linearity by high speed charge (or discharge) of a capacitor and a low speed discharge (or charge) thereof at a constant current rate, compares a deflection current flowing in a vertical deflection coil with the sawtooth wave signal in a differential amplifier to correct the deflection current whereby the amplitude and linearity of the vertical deflection are automatically corrected. The amplitude of the vertical deflection can be adjusted without affecting other characteristics.

Abstract: A pair of antennas mounted on a vehicle receive an echo wave reflected from an obstacle to produce a pair of Doppler signals, the variation of the phase difference of which is used to indicate the direction of the relative movement of the obstacle. The phase difference also represents the difference in propagation lines and is proportional to the relative angular displacement of the obstacle so the rate of variation of relative angular displacement is detectable because the increase and decrease of phase difference negate each other.

Abstract: 1. The combination comprising a pair of magnetic dipole antennae of substantially equal radiation strength in proximate but offset relation and oriented with their axes extending in a common direction, and an oscillating current source operatively connected to both of said antennae to drive them simultaneously but in opposed phase relationship, whereby the dipole moments of said antennae substantially cancel one another so that the antennae function together to produce a magnetic quadrapole radiation substantially free of any dipole movement.

Abstract: A radio direction finding system including a transmitter and associated antenna located at one end of a radio communication path and a receiver and associated antenna at the other end. One of the antennas is characterized by an omni-directional pattern. The other antenna is characterized by a rotating, directional antenna pattern which is periodically reversed in direction at a rate low compared to its rotation frequency, but high compared to changes in bearing occurring between the transmitter and receiver. The periodic modulation of the RF signal caused by the rotating antenna pattern is detected by the receiver which generates a demodulated output signal. This demodulated signal is averaged over a period including the two directions of antenna rotation, with the result that the bearing error portions cancel, yielding a bearing-indicating signal which is relatively free from receiver-introduced phase error.

Abstract: A system for compensating for cross polarization coupling in a dual-polarization satellite communication system, in which two polarized waves of the same frequency and orthogonal to each other are alternately transmitted as a pilot wave from an earth station at a predetermined period. The same polarized wave components of the two signals received by a communication satellite are sent back to the earth station, so that the sent back signal is received by the earth station. An amplitude ratio and a phase difference between the same polarized wave components of the two signals of the received pilot signal are detected. A communication signal wave to be transmitted from the earth station is formed as an elliptically polarized wave by the use of the detected information, thereby compensating for cross polarization coupling of the communication signal wave caused during propagation between the earth station and the communication satellite.

Abstract: A secondary radar system in which the transponder and central station possess for enciphering and deciphering complementary dispersive filters having expansion/compression factors of .theta..DELTA.F.sub.1, where .DELTA.F.sub.1 = 1/.DELTA..mu. is a measure of the spectral width of each reply pulse having a temporal width of .mu., .theta. being at least s .mu./.DELTA..mu., such that at least two adjacent pulses spaced s apart in the initial reply train are completely overlapped in the expanded reply.The application to secondary radar systems, especially of the IFF type, in order to improve considerably the secrecy of the link between an airborne transponder and the ground station.

Abstract: The application relates to a thyristor-controlled horizontal deflection circuit of a television receiver with mains isolation. Input inductor, communtating inductor, and isolation transformer are united in one component. In the transformer used for this component, the open-circuit inductance performs the function of the input inductor of a conventional thyristor horizontal deflection circuit, and the short-circuit inductance that of the commutating inductor.

Abstract: Apparatus is responsive to an alternating signal which exceeds a first level, V.sub.L, and within a given time, t, exceeds a greater second level, V.sub.H, by causing a signal manifestation pulse to issue. The apparatus is responsive to a signal which does not exceed V.sub.H within time t after exceeding V.sub.L causing disablement of the circuit.

Abstract: 1.