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公开(公告)号：US20180106243A1
公开(公告)日：2018-04-19
申请号：US15573248
申请日：2016-05-12
发明人： Aaron Knoll , Paolo Bianco
CPC分类号： F03H1/0012 , F03H1/0037 , F03H1/0075 , F03H1/0081 , H02K44/08 , H02K44/085 , H02K44/10 , H02K44/16 , H02N3/00
摘要： A method of producing a charge separation in a plasma having a low particle density which comprises a plurality of electrons and a plurality of positive ions. The method includes generating a magnetic field and passing the plasma having a low particle density along a first axis through the magnetic field. The magnetic field is generated having a component which is perpendicular to the first axis and is configured so as to deflect the plurality of electrons from the first axis and allow the plurality of positive ions to travel substantially undeflected along the first axis. Also provided is a magnetohydrodynamic generator and a low earth orbit thruster making use of the charge separation mechanism.
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公开(公告)号：US20170313447A1
公开(公告)日：2017-11-02
申请号：US15518072
申请日：2015-10-30
发明人： Jaime REED , Simon BARRACLOUGH , Andrew RATCLIFFE
摘要： A vehicle for intercepting a target object orbiting in space is provided, comprising a launching portion for driving the vehicle into an orbit, and an interception portion for intercepting a target object when the vehicle is in orbit, wherein the interception portion comprises means for engaging with the target object and wherein the launching portion is arranged to drive the vehicle into a first elliptical orbit and the vehicle is arranged to adopt a second elliptical orbit when engaged with the target object in which the first elliptical orbit is arranged so as to intersect the orbit of the target object at an interception point, and the second elliptical orbit is such that the vehicle is arranged to move from the interception point towards the Earth's atmosphere when engaged with the target object. A method of controlling a vehicle for intercepting a target object orbiting in space is also provided, comprising controlling the vehicle to be driven into a first elliptical orbit to intersect the orbit of the target object at an interception point and controlling the vehicle to engage with the target object at the interception point and to adopt a second elliptical orbit when engaged with the target object in which the second elliptical orbit is such that the vehicle is arranged to move from the interception point towards the Earth's atmosphere when engaged with the target object.
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公开(公告)号：US20150171917A1
公开(公告)日：2015-06-18
申请号：US14411812
申请日：2013-05-31
CPC分类号： H04B1/707 , G01S19/215 , H04B7/18523
摘要： A method and apparatus for providing information about an encrypted signal transmitted by a satellite in a satellite navigation system are disclosed. A data sequence of the encrypted signal as transmitted is obtained, a signal sample is extracted from the data sequence, the signal sample including a part of the data sequence having a length less than a total length of the data sequence, and the signal sample and information about when the data included in the signal sample was transmitted by the satellite are transmitted, as the encrypted signal information, to a receiver for use in the satellite navigation system. A method and apparatus for authenticating an unencrypted signal based on the encrypted signal information are also disclosed. In particular, a time offset between an internal clock of the receiver and an internal clock of the satellite is obtained based on the unencrypted signal, the encrypted signal information is received, a portion of the received encrypted signal is identified that is expected to correspond to the signal sample based on the obtained time offset, the identified portion is correlated with the signal sample, and it is determined that the received unencrypted signal is authentic if a predetermined threshold correlation is obtained.
摘要翻译： 公开了一种在卫星导航系统中提供由卫星发送的加密信号的信息的方法和装置。 获得发送的加密信号的数据序列，从数据序列中提取信号样本，信号样本包括长度小于数据序列的总长度的数据序列的一部分，信号样本和 将由卫星发送的信号样本中的数据何时作为加密信号信息发送到卫星导航系统中使用的接收机。 还公开了一种基于加密信号信息来认证未加密信号的方法和装置。 特别地，基于未加密的信号获得接收机的内部时钟和卫星的内部时钟之间的时间偏移，接收到加密的信号信息，识别出接收的加密信号的一部分，该部分预期对应于 基于获得的时间偏移的信号样本，所识别的部分与信号样本相关，并且如果获得预定的阈值相关性，则确定接收的未加密信号是可信的。
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公开(公告)号：US20150151856A1
公开(公告)日：2015-06-04
申请号：US14405714
申请日：2013-06-05
发明人： Jaime Reed
CPC分类号： B64G1/64 , B64G1/1078 , B64G1/242 , B64G1/646 , B64G1/648
摘要： There is provided an apparatus for capturing a space object, the apparatus comprising a harpoon element for penetrating the object, the harpoon element being configured to form part of a harpoon for launching towards the object; and penetration control means for controlling the penetration of the harpoon element into the object. The penetration control means can comprise a compressible component, forming part of the harpoon, for absorbing some of the kinetic energy of the harpoon. Alternatively or additionally, it may comprise means for varying the launch speed of the harpoon.
摘要翻译： 提供了一种用于捕获空间物体的装置，该装置包括用于穿透物体的鱼叉元件，该鱼叉元件构造成形成朝向物体发射的鱼叉的一部分; 以及用于控制鱼叉元件穿入物体的穿透控制装置。 穿透控制装置可以包括形成鱼叉的一部分的可压缩部件，用于吸收鱼叉的一些动能。 或者或另外，它可以包括用于改变鱼叉的发射速度的装置。
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公开(公告)号：US20150122454A1
公开(公告)日：2015-05-07
申请号：US14397960
申请日：2013-04-23
发明人： John Houghton
CPC分类号： F28D15/0275 , B23P15/26 , B64G1/506 , F28D15/04 , F28F2275/025 , F28F2275/20 , Y10T29/49353
摘要： A structural panel for a satellite comprising an elongate pipe mounted thereto. The heat pipe is bonded to the panel intermediate its remote ends with a thermally conductive adhesive. The adhesive is omitted proximate at least one distal end of the heat pipe. The at least one distal end of the heat pipe without adhesive is mechanically secured to the panel by at least one bolt received in a cooperating threaded receiving element. A method of manufacturing such a panel is also provided.
摘要翻译： 一种用于卫星的结构面板，包括安装在其上的细长管。 热管通过导热粘合剂粘合到其远端的面板上。 在热管的至少一个远端附近省略粘合剂。 没有粘合剂的热管的至少一个远端通过容纳在协作螺纹接收元件中的至少一个螺栓机械地固定到面板。 还提供了制造这种面板的方法。
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公开(公告)号：US20150102173A1
公开(公告)日：2015-04-16
申请号：US14386403
申请日：2013-02-25
发明人： Steve Evkersley , Stephen Kemble
CPC分类号： B64G1/24 , B64G1/105 , B64G1/1085 , B64G1/242 , B64G2001/1064
摘要： A method of solar occultation, and in particular solar coronagraphy, employing a spacecraft 200 is disclosed. The spacecraft is controlled to achieve a position within a target zone relative to a celestial body, such as the Moon, such that the celestial body occults the Sun, allowing observations of the Sun or the space around the Sun, and in particular the Sun's corona, to be made from the spacecraft. The spacecraft has an orbit 40 around the Earth in a plane S, which like the Moon's orbit 20 in plane M, is inclined relative to the ecliptic plane E. Once inside the target zone, the spacecraft's orbit is controlled such that it remains in the target zone for longer than it would otherwise. This is achieved through the orbit within the target zone being at least partly non-Keplerian, when the orbit is under the influence of spacecraft translational thrust for example. The invention also extends to a method of controlling a spacecraft, to a spacecraft, and to a solar coronagraph comprising a spacecraft and a celestial body.
摘要翻译： 公开了一种使用航天器200的太阳遮蔽方法，特别是太阳能冠状太空。 控制航天器相对于诸如月球等天体的目标区域中的位置，使得天体遮蔽太阳，允许观测太阳或太阳周围的空间，特别是太阳的电晕 ，由宇宙飞船制造。 航天器在平面S中具有围绕地球的轨道40，其像在平面M中的月球的轨道20相对于黄道平面E倾斜。一旦进入目标区域，则航天器的轨道被控制成使其保持在 目标区域长于其他地方。 这是通过目标区域内的轨道实现的，当轨道处于航天器平移推力的影响下时，至少部分是非开普勒的。 本发明还延伸到控制航天器，航天器和包括航天器和天体的太阳能冠冕的方法。
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公开(公告)号：US11374689B2
公开(公告)日：2022-06-28
申请号：US17081631
申请日：2020-10-27
发明人： Ray James , Keith Travis , Stephen Williams , Kevin Jones
摘要： An industrial control system includes an encryption device, a decryption device and a mission-critical communication link connecting the encryption device to the decryption device. The encryption device is configured to send encrypted messages to the decryption device over the mission-critical communication link. The system includes a failure monitor configured to monitor for a failure of the encryption device or the decryption device, and, in the event of failure, to continue the sending of the messages to the decryption device but without encrypting the messages.
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公开(公告)号：US11239906B2
公开(公告)日：2022-02-01
申请号：US16760997
申请日：2018-11-28
发明人： Steve Laws
摘要： An improved procedure and associated hardware to allow a satellite to switch antenna coverages according to predefined repetitive sequences and to align switching of the antenna sequence with ground data sequence switching. The principle of synchronisation of the sequence switching is based on the anticipation of the exact time at which change in beam hopping sequence occurs at the satellite, such that a change to a beam hopping sequence can be reflected in ground data sequence switching without losing connectivity between the satellite and ground segment.
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公开(公告)号：US11218302B2
公开(公告)日：2022-01-04
申请号：US16646902
申请日：2018-09-11
发明人： Brian Turton , Martin Sharpe
摘要： A method of data transmission, and more particularly a secure method of data transmission. The method comprises generating and sending a classical data stream and quantum data stream from a source to a destination. The step of generating and sending a classical data stream from the source to the destination comprises encrypting the data stream with the repeated use of a once-seen pad. Observing the quantum data stream received at the destination, may indicate eavesdropping and if so, the classical data stream is modified and sent from the source to the destination, including stopping the repeated use of the once-seen pad. The same once-seen pad may be used a number of times provided no third party has seen data encrypted by the once-seen pad.
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