公开(公告)号：US5041833A

公开(公告)日：1991-08-20

申请号：US534328

申请日：1990-06-04

Applicant: Aaron Weinberg

Inventor： Aaron Weinberg

IPC: G01S5/14 ,  G01S11/08 ,  G01S19/11 ,  H04B7/185

CPC classification number: G01S11/08 ,  G01S5/14 ,  H04B7/18552

Abstract: A precise ranging and timing system using pseudo-noise bandwidth synthesis to provide precise orbit determination for geosynchronous and low earth orbit satellites, navigation of low earth orbiting satellite through signals transmitted through geosynchronous satellites and precise time-transfer. The system includes a novel signal structure which is comprised of disjoint, narrow band, spectral components spread over a wide bandwidth. The number of spectral components, their individual bandwidths, and their specific spectral locations over the end-to-end spread bandwidth determine the ultimate capabilities and performance achievable. The broad beam transmission of the precise ranging and timing system signal via a geosynchronous satellite provide the precise ranging and timing system capability to suitably equipped users for a multiplicity of purposes including: (1) precise orbit determination, (2) navigation of low-earth orbiting satellites through signals transmitted through geosynchronous satellites, and (3) precise time transfer.

Abstract translation: 使用伪噪声带宽合成的精确测距和定时系统为地球同步和低地球轨道卫星提供精确的轨道确定，通过地球同步卫星传输的信号和精确的时间传输来导航低地球轨道卫星。 该系统包括一个新颖的信号结构，由不相交的窄带，宽带宽分布的频谱分量组成。 频谱分量的数量，其各自的带宽以及其在端到端扩展带宽上的特定频谱位置决定了可实现的最终性能和性能。 通过地球同步卫星的精确测距和定时系统信号的宽波束传输为适当装备的用户提供了多种目的的精确测距和定时系统能力，包括：（1）精确轨道确定，（2）低地球导航 轨道卫星通过地球同步卫星传输的信号，以及（3）精确的时间传递。

公开(公告)号：US4500885A

公开(公告)日：1985-02-19

申请号：US455673

申请日：1965-05-11

Applicant: Henry R. Beyer ,  Richard G. DeSipio ,  Thomas F. Long ,  Joseph Ritz

Inventor： Henry R. Beyer ,  Richard G. DeSipio ,  Thomas F. Long ,  Joseph Ritz

IPC: G01S11/08 ,  G01S3/02

CPC classification number: G01S11/08

Abstract: A data link for an automatic aircraft carrier landing system is described which an aircraft is guided to the carrier by pitch and bank information from the carrier so as to indicate to the pilot of the aircraft whether he is within a prescribed flight path for landing or whether he should be waved off for another approach. The information transmitted from the carrier is received by a microelectronic data link receiver having an internal clock which is synchronized with the incoming information to determine if that particular aircraft is being addressed and if so, what the nature of this information is so that it may be stored and presented to the pilot at a later time for appropriate action.

Abstract translation: 描述了一种用于自动航空母舰着陆系统的数据链路，其中飞行器通过来自承运人的俯仰和银行信息被引导到承运人，以便向飞行员的飞行员指示他是否在用于着陆的规定飞行路径内， 他是否应该为了另一种做法而挥之不去。 从载波发送的信息由具有与传入信息同步的内部时钟的微电子数据链路接收机接收，以确定该特定飞机是否被寻址，如果是，则该信息的性质是如此 存储并在稍后的时间提交给飞行员进行适当的行动。

公开(公告)号：US4193073A

公开(公告)日：1980-03-11

申请号：US699758

申请日：1968-01-16

Applicant: Hubert Kohnen

Inventor： Hubert Kohnen

IPC: G01S11/08 ,  G01S13/46 ,  G01S13/93 ,  G01S9/06

CPC classification number: G01S11/08 ,  G01S13/46 ,  G01S13/9303 ,  G01S2013/466

Abstract: An electronic ranging method and apparatus for determining and optionally displaying in real time the location (or relative position) of as many as one thousand geographically-separated stations or "users" within an operational zone by means of slant range measurement and trilateration. Each "user" is assigned a specific time slot which is precision-synchronized with those of all other users, and this time slot is utilized by the unit to which it is assigned for transmitting a signal which enables range measurements to be obtained with respect thereto by a plurality of other users in its area. The range data thus derived by each user is stored in a memory bank and subsequently transmitted in sequence to one or more master stations, where a computer resolves the received information to establish accurate positional locations of the individual units. Cyclic re-synchronization of the timing equipment of each user is also provided for, as well as an arrangement whereby each user unit may act in turn as a master station for re-synchronization purposes.

Abstract translation: 一种电子测距方法和装置，用于通过倾斜范围测量和三边测量来确定和可选地实时显示操作区域内多达一千个地理上分离的站或“用户”的位置（或相对位置）。 为每个“用户”分配与所有其他用户精确同步的特定时隙，并且该时隙由其被分配用于发送信号的单元利用，该信号使得能够相对于其获得范围测量 由其区域中的多个其他用户。 由每个用户导出的范围数据被存储在存储器组中，并且随后被依次发送到一个或多个主站，其中计算机解析所接收的信息以建立各个单元的精确的位置位置。 还提供每个用户的定时设备的循环重新同步，以及每个用户单元依次作为主站进行重新同步的布置。

公开(公告)号：US4161730A

公开(公告)日：1979-07-17

申请号：US842402

申请日：1977-10-17

Applicant: Roy E. Anderson

Inventor： Roy E. Anderson

IPC: G01S5/12 ,  G01S11/08 ,  G01S13/86 ,  G01S19/11

CPC classification number: G01S5/12 ,  G01S11/08 ,  G01S13/46 ,  G01S13/76 ,  G01S13/86 ,  G01S2013/466

Abstract: The time-of-arrival of timing signals transmitted by two satellites is measured relative to a crystal clock, and an approximate position fix is computed for the ship or other object being located. Because of clock error the position fixes are displaced along a hyperbolic line of position. A two-way active range measurement through a third satellite or one timing signal satellite enables computation of an independently determined line of position, the true position fix being at its intersection with the hyperbolic line of position. The clock error is corrected and the method of position fixing from two timing satellites is repeated until the clock drift exceeds acceptable limits. A continuous navigation service and also position surveillance are realized.

Abstract translation: 由两颗卫星发射的定时信号的到达时间是相对于晶体时钟测量的，并且对于被定位的船舶或其他物体计算大致的位置锁定。 由于时钟误差，位置锁定沿位置的双曲线移位。 通过第三卫星或一个定时信号卫星的双向有源距离测量使得能够计算独立确定的位置线，真实位置定位在与双曲线位置的交点处。 校正时钟误差，重复来自两个定时卫星的定位方法，直到时钟漂移超过可接受的极限。 实现了连续的导航服务和位置监控。

公开(公告)号：US3798650A

公开(公告)日：1974-03-19

申请号：US3798650D

申请日：1972-10-02

Applicant: BENDIX CORP

Inventor： MC COMAS A ,  RANSOM J ,  MALL A ,  KESSLER J ,  DOELLER C

IPC: G01S11/08 ,  G04G7/00 ,  H04J3/06 ,  H04B7/00

CPC classification number: H04J3/0682 ,  G01S11/08 ,  G04G7/00

Abstract: A time ordered communications system wherein a master station equipped with a master clock which includes a reference oscillator disseminates correct time to remote stations equipped with local clocks which include local oscillators by transmitting a synchronization signal whose time of arrival at the remote station with respect to an internal reference pulse generated by the remote station is a measure of remote station clock error. The time interval between receipt of the synchronization signal and generation of the internal reference pulse is digitally determined to produce an error signal which is used to add or delete local oscillator pulses so as to immediately phase correct the local clock. In addition, the first and second time derivatives of the error signal are obtained and used to compensate the local clock for oscillator drift and other errors.

Abstract translation: 一种时间有序的通信系统，其中配备有包括参考振荡器的主时钟的主站通过发送相对于一个或多个远程站的到达时间的同步信号向配备有本地振荡器的本地时钟的远程站传播正确的时间 远程站产生的内部参考脉冲是远程站时钟误差的量度。 数字地确定接收同步信号和产生内部参考脉冲之间的时间间隔，以产生用于增加或删除本地振荡器脉冲的误差信号，以便立即校正本地时钟。 此外，获得误差信号的第一和第二时间导数，并用于补偿振荡器漂移的本地时钟和其他误差。

公开(公告)号：US3797015A

公开(公告)日：1974-03-12

申请号：US3797015D

申请日：1971-10-04

Applicant: ELWOOD A

Inventor： ELWOOD A

IPC: G01S5/14 ,  G01S11/08 ,  G01S19/11 ,  G01S19/48

CPC classification number: G01S5/14 ,  G01S11/08

Abstract: A method of and system for locating a position in which a plurality of frequency standard devices based on the action of the natural frequencies associated with transitions between energy states in atoms and/or molecules are synchronized or phase compared at the same initial location. Two of three frequency standard devices, in a two-dimensional embodiment, are placed at transmitting stations on a known baseline. The third device is at a third station, a receiving station, which receives signals from the two transmitting stations. At each transmitting station, means are provided for producing and transmitting a radio frequency carrier signal of fixed frequency and of fixed phase under the control of the frequency standard device associated with the respective station. The radio frequency carrier signals produced at the different transmitting stations differ in frequency. The radio frequency carrier signal produced at each transmitting station is modulated with a modulating signal produced under the control of the same frequency standard device which controls the means which produce the radio frequency carrier. At the receiving station, means are provided for producing a reference signal corresponding to the modulating signal and two radio frequency signals corresponding, in frequency, to the radio frequency carrier signals transmitted, the means at the receiving station being controlled by the frequency standard device associated with the receiving station. The reference signal is compared at the receiving station with the modulating signals recovered from the radio frequency carriers to determine respective time differences, the differences representing coarse position data from which the total number of phase rotations (full lanes) the receiving station is from each of the transmitting stations are determined. The phase relationships between each of the received radio frequency carrier signals and the respective one of the two radio frequency signals produced at the receiving station are determined, the relationships representing fine position data which are measurements of the receiving station position within a given phase rotation (lane). Methods and systems for locating a position in three dimensions are also described. The fine ranges, distances within given lanes, are respectively added by a computer to respective coarse ranges, each of which represents the total number of lanes to the full lane closest to respective ones of the transmitting stations, the totals being the distances between the receiving station and each of the transmitting stations.

公开(公告)号：US3763492A

公开(公告)日：1973-10-02

申请号：US3763492D

申请日：1970-10-08

Applicant: US NAVY

Inventor： EASTON R

IPC: G01S11/08 ,  G01S11/00

CPC classification number: G01S11/08

Abstract: An improvement to a navigation system which includes earth satellites that carry stable oscillators which are synchronized with a stable oscillator at the navigator''s station; the improvement consisting of means that improve system sensitivity and reduce the effectiveness of jamming by including in the receiver at the navigator''s station a tracking oscillator which is locked onto the carrier frequency received from the satellite. The tracking oscillator output is frequency divided down and phase locked with the multifrequency tone signals that are also received from the satellite and then phase compared with similar multifrequency signals which are derived from the stable oscillator at the navigator''s station.

Abstract translation: 导航系统的改进，其包括携带稳定振荡器的地球卫星，其与导航台的稳定振荡器同步; 改进包括通过在导航台的接收机中包括锁定在从卫星接收的载波频率上的跟踪振荡器来提高系统灵敏度并降低干扰的有效性的手段。 跟踪振荡器输出被分频并与从卫星接收的多频音信号相锁定，然后与在导航台的稳定振荡器导出的类似多频信号进行相位比较。

公开(公告)号：US3691559A

公开(公告)日：1972-09-12

申请号：US3691559D

申请日：1969-03-28

Applicant: NAVSAT CORP

Inventor： JACKSON HOMER E

IPC: G01S11/08 ,  G01S11/00

CPC classification number: G01S11/08 ,  G01S11/10

Abstract: An aircraft collision avoidance system and method involves transmitting a stable reference frequency from a synchronous satellite to aircraft in a region being monitored. Each aircraft in the region receives the reference frequency and transmits a carrier, modulated with the received reference frequency, to other aircraft in a collision avoidance zone. At the other aircraft, an indication of impending collision is provided by measuring the rate of change of the carrier Doppler frequency shift received thereby from the first named aircraft. Sync pulses periodically modulate the reference frequency transmitted from the satellite for aircraft ranging and data control purposes. To limit the collision warning zone relative to each aircraft, the receiver thereof is deactivated at a predetermined time after each sync pulse is received from the satellite.

Abstract translation: 飞机防撞系统和方法包括将一个稳定的参考频率从一个同步卫星传输到被监测区域的飞机。 该区域中的每架飞机接收参考频率，并将接收到的参考频率调制的载波发送到避碰区的其他飞机。 在另一架飞机上，通过测量从第一名飞行器接收的载波多普勒频移的变化率来提供即将发生的碰撞的指示。 同步脉冲周期性调制从卫星发送的参考频率用于飞机测距和数据控制目的。 为了相对于每个飞机限制碰撞警告区，在从卫星接收到每个同步脉冲之后的预定时间，其接收器被去激活。

公开(公告)号：US3643259A

公开(公告)日：1972-02-15

申请号：US3643259D

申请日：1970-02-20

Applicant: RONALD S ENTNER

Inventor： ENTNER RONALD S

IPC: G01S5/14 ,  G01S11/08 ,  G01S19/38 ,  G01S11/00

CPC classification number: G01S11/08 ,  G01S5/14

Abstract: A system to navigate aircraft employing an earth satellite emitting stored signals from its memory device at predetermined times, controlled by a precision clock. The aircraft desiring navigation aid, having an atomic clock synchronized with the satellite''s, can thus calculate the propagation delay and the distance travelled by the signal. A computer aboard the aircraft generates a mathematical representation of a sphere, the radius being equal to the distance travelled by the satellite signal. Employing an inertial navigation set linked to the computer, the computer generates two additional spheres, each displaced from the previous sphere by the distance the aircraft travelled prior to receiving the succeeding satellite transmission. The intersection point of the three spheres is the location of the satellite. Knowing the satellite trajectory in advance, the aircraft can thus determine its position with respect to the earth.

Abstract translation: 一种使用地球卫星导航的飞行器的系统，其由预定时间从其存储装置发射存储信号，由精确时钟控制。 因此，具有与卫星同步的原子钟的飞机希望导航辅助装置能够计算传播延迟和信号行进的距离。 飞机上的计算机产生球体的数学表示，半径等于由卫星信号行进的距离。 使用与计算机相连的惯性导航装置，计算机产生两个另外的球体，每个球体在接收到后续的卫星传输之前，从前一球体移开飞行器行进的距离。 三个球体的交点是卫星的位置。 事先知道卫星轨迹，飞机因此可以确定其相对于地球的位置。

公开(公告)号：US3564544A

公开(公告)日：1971-02-16

申请号：US3564544D

申请日：1969-01-02

Applicant: SIERRA RESEARCH CORP

Inventor： SCOTT WILLIAM V ,  LENNON WILLIAM T JR

IPC: G08G5/04 ,  G01S11/08 ,  G04G7/02 ,  G01S9/56 ,  G01S9/10

CPC classification number: G01S11/08 ,  G04G7/02

Abstract: A SYSTEM FOR SYNCHRONIZING AIRCRAFT CLOCKS TO AN ESTABLISHED MASTER TIME, THE CLOCKS HAVING VARYING DEGREES OF STABILITY AND THESE DEGREES ESTABLISHING DIFFERENT MODES OF LOCAL OPERATION, DEPENDING UPON MOMENTARY ESTIMATES OF LOCAL CLOCK ACCURACY, AND THE DIFFERENT MODES INCLUDING GRADUATED RATES OF CLOCK CORRECTION, AS WELL AS THE SELECTION OF TIME SLOTS IN DIFFERENT SERIES DESIGNATED FOR OCCUPANCY BY AIRCRAFT HAVING ESTIMATED CLOCK ERRORS OF DIFFERENT MAGNITUDES, THE SYSTEM INCLUDING AN ASYNCHRONOUS BACK-UP MODE OCCUPIED BY AIRCRAFT WHOSE CLOCKS ARE ENTIRELY OUT OF SYNCHRONIZATION. THE SYSTEM FURTHER INCLUDES MEANS FOR SELECTING UNOCCUPIED SLOTS, FOR ESTABLISHING COARSE SYNCHRONIZATION IN ONE MODE, FOR THEN PROCEEDING BY PROPORTIONAL CLOCK CORRECTION TO MODES OF HIGHER DEGREES OF CYNCHRONIZATION, AND FOR CHANGING TO APPROPRIATE OTHER UNOCCUPIED TIME SLOTS AND REDUCING THE MAGNITUDE OF SUBSEQUENT CLOCK CORRECTIONS AS A RESULT OF IMPROVEMENT IN THE DEGREE OF CLOCK SYNCHRONIZATION.