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公开(公告)号：US20220207932A1
公开(公告)日：2022-06-30
申请号：US17135320
申请日：2020-12-28
申请人： LOON LLC
摘要： The technology relates to health and lifetime estimation for a lighter-than-air vehicle. A method for vehicle health and lifetime estimation may include receiving flight data inputs associated with a vehicle, determining a gas temperature based on the flight data inputs, estimating a gas amount remaining in a balloon envelope of the vehicle, estimating a gas leak rate based on the gas amount, estimating a component lifetime representing an estimated lifetime of a component of the vehicle, and determining a remaining lifetime output based on one or both of the gas leak rate or the component lifetime, the remaining lifetime output indicating a remaining lifetime estimate for the vehicle. The method also may include simulating a terminal event and causing the vehicle to take an action based on the remaining lifetime estimate.
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公开(公告)号：US20220007518A1
公开(公告)日：2022-01-06
申请号：US16917955
申请日：2020-07-01
申请人： Loon LLC
发明人： Keith Fries , Vineethkumar Nair
摘要： Aspects of the technology employ significantly reduce void formation beneath critical components on a printed circuit board (PCB). This is accomplished using advanced fabrication techniques that include employing alignment fixtures and solder standoffs to position duplexers, using nitrogen gas during the reflow process, and maintaining specific temperature and “time above liquideous” (TAL) controls. Certain types of components, such as duplexers used in communication circuit boards, can be highly susceptible to voids. Because such components are relatively large and block x-rays, it is challenging to determine whether voids have been formed beneath them. Thus, in many instances conventional fabrication techniques are insufficient to produce viable circuit boards that minimize void formation within acceptable tolerances. It may be mission critical to minimize voids, such as for PCBs used in communication modules deployed on high altitude platforms intended to operate in the stratosphere for extended periods of time.
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公开(公告)号：US20210396908A1
公开(公告)日：2021-12-23
申请号：US16905767
申请日：2020-06-18
申请人： LOON LLC
发明人： Salvatore J. Candido
摘要： The technology relates to an intelligent weather data service for providing optimized weather forecast data using real time weather observation data in response to weather forecast requests. A weather data system may include a scorer job configured to obtain weather observation data and weather forecast data from a plurality of weather data sources and to generate a plurality of error scores for the weather forecast data over a predetermined time period, each of the plurality of error scores corresponding to one of the plurality of weather data sources and indicating, for a cell on a grid map, an amount or a probability of error in the weather forecast data by a weather data source in relation to the weather observation data; an observations index configured to index the weather observation data; a data store configured to store the plurality of error scores; and a fusion layer configured to receive and respond to a weather data request using the plurality of error scores.
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公开(公告)号：US11171726B1
公开(公告)日：2021-11-09
申请号：US17136815
申请日：2020-12-29
申请人： LOON LLC
发明人： Cyrus Behroozi
IPC分类号： H04B10/118 , H04B7/185 , H04B10/11 , H04B10/112
摘要： Aspects of the technology include establishing a primary communication link between a communication system of a first balloon and a communication system of a second balloon, detecting a movement of the second balloon relative to the first balloon that is expected to cause the primary communication link to become unavailable at a given time during the movement, establishing an RF communication link between an RF communication system of the first balloon and an RF communication system of the second balloon, detecting that the movement of the second balloon relative to the first balloon is such that the primary communication link between the communication system of the first balloon and the optical communication system of the second balloon can be re-established, and re-establishing the primary communication link between the communication system of the first balloon and the communication system of the second balloon.
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公开(公告)号：US20210313669A1
公开(公告)日：2021-10-07
申请号：US16838077
申请日：2020-04-02
申请人： Loon LLC
发明人： Sharath Ananth , Paul Heninwolf , Simon Scott
摘要： A method and an antenna system are provided for a high-altitude platform (HAP) configured to move in a pattern in the stratosphere to provide coverage to a region of interest and compensate for HAP movement relative to the region of interest. HAP movement is monitored. When it is determined that the HAP has moved relative to the region of interest and, based on the relative movement, a first one of a plurality of antennas in the HAP is no longer able to cover a selected portion of the region of interest, an antenna array switching circuit in the HAP is used to adjust beams transmitted by the antennas by switching to a second one of the plurality of antennas to cover the selected portion of the region of interest, such that the communication services provided to the region of interest are not interrupted due to the movement of the HAP.
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公开(公告)号：US20210200204A1
公开(公告)日：2021-07-01
申请号：US16728771
申请日：2019-12-27
申请人： LOON LLC
摘要： Methods and systems for controlling a group of aerial vehicles to meet a connectivity service objective are provided. A method may include causing aerial vehicles in the group to arrive at a target service area during a given arrival time window associated with the connectivity service objective, which may indicate a desired probability of service coverage of the target service area. The method further includes calculating a probability of service coverage of the target service area for the vehicles for a time period after the vehicles are expected to arrive at the target service area, determining whether the probability of service coverage meets a threshold, and causing the vehicles to operate according to a station seeking flight policy during the time period.
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公开(公告)号：US20210135744A1
公开(公告)日：2021-05-06
申请号：US17121168
申请日：2020-12-14
申请人： LOON LLC
发明人： Sharath Ananth , Cyrus Behroozi , Sergey Vichik
摘要： Aspects of the disclosure provide an antenna system for a high-altitude platform (HAP). The antenna system may include a central panel including a first set of antenna elements. The antenna system may also include a plurality of auxiliary panels arranged around the central panel and at an angular offset from the central panel. Each auxiliary panel of the set of auxiliary panels may include a second plurality of antenna elements. The first plurality of antenna elements may be configured to provide network coverage within a first area having a first radius and each of the second sets of antenna elements are configured to provide network coverage within a second area beyond the first radius.
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8.发明申请公开(公告)号：US20210127280A1
公开(公告)日：2021-04-29
申请号：US17087933
申请日：2020-11-03
申请人： Loon LLC
发明人： Sharath Ananth , Brian Barritt , Jin Zhang
摘要： The disclosure provides a method of operating a communication network. The method includes receiving input data related to a state of the communication network and operation of the communication network. The method then includes determining a policy for the communication network based on the input data. The policy is a set of features for forming a plurality of communication links in the communication network over a time interval. The plurality of communication links provides one or more paths through the communication network. Determining the policy is based at least in part on utility values of previous policies. The utility values of previous policies are derived using simulation and/or real-world implementation of the previous policies. The communication network is then operated to implement the policy in the time interval.
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公开(公告)号：US20210124352A1
公开(公告)日：2021-04-29
申请号：US16667441
申请日：2019-10-29
申请人： LOON LLC
摘要： The technology relates to navigating aerial vehicles using deep reinforcement learning techniques to generate flight policies. An operational system for controlling flight of an aerial vehicle may include a computing system configured to process an input vector representing a state of the aerial vehicle and output an action, an operation-ready policies server configured to store a trained neural network encoding a learned flight policy, and a controller configured to control the aerial vehicle. The input vector may be processed using the trained neural network encoding the learned flight policy. A method for navigating an aerial vehicle may include selecting a trained neural network encoding a learned flight policy from an operation policies server, generating an input vector comprising a set of characteristics representing a state of the aerial vehicle, selecting an action, by the trained neural network, based on the input vector, converting the action into a set of commands, by a flight computer, the set of commands configured to cause the aerial vehicle to perform the action, and causing, by a controller, the aerial vehicle to perform the action using the set of commands.
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公开(公告)号：US10988228B2
公开(公告)日：2021-04-27
申请号：US16163180
申请日：2018-10-17
申请人： LOON LLC
发明人： Cyrus Behroozi , Richard Chad Bruns
摘要： Aspects of the technology relate to temperature regulation for high altitude, long duration balloons, such as balloons that operate in the stratosphere for weeks, months or longer. A balloon covering overlays the balloon envelope. The material properties and configuration of the balloon covering are selected to enable it to automatically cover or expose portions of the envelope depending on environmental conditions. The covering has multiple layers of materials with different coefficients of thermal expansion (CTE). The layers are chosen to have significantly different CTEs, and flaps are created in the envelope such that depending on the temperature, the flaps will either lie flat on the envelope or curl away from the envelope. In the former case, the flaps help to retain heat in the envelope, such as during nighttime operation. Conversely, in the latter case, the flaps permit heat to escape from the envelope, such as during daytime operation.
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