摘要:
Apparatus for combining positional data from OMEGA and VOR/DME radio navigation systems to provide computed positional data corresponding thereto includes a circuit for generating an OMEGA compensation in accordance with the difference between the computed value of the positional data and the VOR/DME value thereof. The computed value is provided by algebraically adding the OMEGA compensation to the positional data from the OMEGA system. The gain of the OMEGA compensation circuit is adjusted in an inverse relation with respect to the range of the aircraft from the VOR/DME station thus providing high accuracy positional data throughout the enroute flight of the aircraft without the attendant complexities and inaccuracies normally associated with the separate OMEGA and VOR/DME radio navigation aids.
摘要:
A method of manufacturing methallyl sulfonate, which comprises: forming a sulfur trioxide-dialkyl sulfoxide complex by effecting reaction between sulfur trioxide and dialkyl sulfoxide as mixed at the ratio of more than 0.8 mol of the latter to 1 mol of the former in the presence of an inert solvent; effecting reaction between said complex and isobutylene, in an amount of 0.9-1.2 mols of isobutylene per 1 mol of sulfur trioxide, by applying a temperature in the range of 10.degree.-80.degree.C; and neutralizing the reaction product with a base.
摘要:
A vehicle locating system is disclosed which uses the carrier signals of unsynchronized commercial AM broadcasting stations to form hyperbolic isophase grid lines. Each vehicle is equipped with a three-channel receiver, each channel being tuned to a different one of three spaced apart stations to provide to a central station information of motion from a known position by counting isophase lines crossed. A stationary receiver similarly counts isophase lines, which cross some fixed location due to drift in the transmission of the unsynchronized stations, to provide drift information to be subtracted from the vehicle motion information.
摘要:
To display at a command post the positions of all vehicles in a tactical area, each vehicle receives three VLF''s of an ''''Omega'''' grid of hyperbolic lines and retransmits the phase information thereof via an HF link to the command post.
摘要:
A method for identifying transmitters by a terminal in a single-frequency network comprising a plurality of transmitters. The transmitters are synchronized and transmit with an artificial delay τi, specific to each transmitter. The method comprises at least one step of acquiring the approximate position of the terminal {circumflex over (p)}, the position pi of a list of transmitters {Tx} in the vicinity of the terminal and the delays τi associated with them, a step of measuring pseudo-distances ρi between the transmitters and the terminal and a step of associating the measurements ρi with the transmitters of known positions pi by minimizing a cost function, said cost function ν(ρi,{circumflex over (p)},σ) corresponding to the norm of the error between the measurements ρi and a model of measurements of the pseudo-distances applied to a permutation of the position of the transmitters σ.
摘要翻译:一种用于由包括多个发射机的单频网络中的终端识别发射机的方法。 发射机同步并以每个发射机特有的人为延迟τi传输。 该方法包括至少一个步骤:获取终端的近似位置(回旋(p)}),终端附近的发射机列表{Tx}的位置pi和与其相关联的延迟τi,步骤 测量发射机和终端之间的伪距离和i的步骤以及通过最小化成本函数将测量值与已知位置pi的发射机相关联的步骤,所述成本函数&ngr;(&rgr; i,{circumflex over (p)},&sgr;),其对应于测量值与测量值之间的误差范围,以及应用于发射器和位置的位置的置换的伪距离的测量模型。