Abstract: Various techniques are provided for obtaining a precise absolute time using a satellite system. In one example, a method of transferring precise absolute time from a satellite to a device includes receiving data from a messaging channel, wherein the data has a frame structure. The method also includes using the data to identify the satellite and a position of the satellite, correcting for signal time of flight using the satellite identity and the position, and using the data as a time reference to align a receiver clock to the frame structure. The method also includes, with the receiver clock aligned to the frame structure, receiving a precision time signal from the satellite, wherein the precision time signal comprises a periodic repeating code. The method also includes determining a timing phase of the code and using the timing phase to determine a precise absolute time.

Abstract: A system, method, and apparatus for secure routing based on the physical location of routers are disclosed herein. The disclosed method for secure data transmission of at least one data packet through a plurality of network nodes involves defining a source network node, a destination network node, and at least one security constraint, which is based on the physical location of at least one of the network nodes. The method further involves comparing available network nodes with the security constraint(s) to determine which of the available network nodes meet the security constraint(s) and, thus, are qualified network nodes. Additionally, the method involves determining a route comprising at least one of the qualified network nodes to route the data packet(s) through from the source network node to the destination network node. Further, the method involves transmitting the data packet(s) through the route of the qualified network node(s).

Abstract: A system, method, and apparatus for cells to obtain timing and positioning by using satellite systems with high power signals for improved building penetration are disclosed herein. In particular, the present disclosure relates to providing timing synchronization and geolocation for small cells or macrocells in attenuated and/or indoor environments. In order to achieve timing synchronization and geolocation, the cells utilize high power signals, which contain timing information, in conjunction with related aiding information. Satellites, such as Low Earth Orbiting (LEO) Iridium satellites, are employed to transmit the high powered signals to the cells.

Abstract: The disclosed method and system is used to determine the position of a user device. The user device can receive data signals and/or carrier signals from orbiting space vehicles. These data signals can be used for positioning calculation and/or track maintenance of the user device. The disclosed method and system can account for time and frequency biases of the user device. For the track maintenance, a Kalman filter state estimator can be extended to include a velocity of the user device.

Abstract: The disclosed method and system is used to determine the position of a user device. The user device can receive data signals and/or carrier signals from orbiting space vehicles. These data signals can be used for positioning calculation and/or track maintenance of the user device. The disclosed method and system can account for time and frequency biases of the user device. For the track maintenance, a Kalman filter state estimator can be extended to include a velocity of the user device.

Abstract: A system, method, and apparatus for advanced timing and time transfer for satellite constellations using crosslink ranging and an accurate time source are disclosed herein. In particular, the present disclosure relates generally to systems for providing improved positioning, navigation, and/or timing information for oscillator calibration and more specifically, to use at least one satellite with accessibility to an accurate time source to calibrate the local oscillator on a crosslink paired satellite. In at least, one embodiment, time synchronization on a subset of satellites with crosslinking capabilities is used to distribute time through a network of crosslinked satellites.

Abstract: A system, method, and apparatus for contextual-based virtual data boundaries are disclosed herein. In particular, the present disclosure relates to improvements in access control that work to restrict the accessibility of data based on assigning contextual data thresholds that create a virtual boundary. Specifically, the disclosed method involves assigning at least one threshold to at least one contextual criterion. The method further involves determining whether contextual information from the claimant meets at least one threshold to at least one contextual criterion. Also, the method involves authenticating the claimant, if the contextual information from the claimant meets at least one of the thresholds to at least one contextual criterion. Further, the method involves allowing the claimant access to the data, if the claimant is authenticated.

Abstract: A system, method, and apparatus for secure routing based on a degree of trust are disclosed herein. The disclosed method involves assigning a level of trust to at least one network node, and utilizing the level of trust to determine a degree of security of the network node(s). The level of trust of the network node(s) is related to an amount of certainty of the physical location of the network node(s). The amount of certainty is attained from the network node(s) being located in a known secure location, and/or from verification of the physical location of the network node(s) by using satellite geolocation techniques or by using network ping ranging measurements. The method further involves utilizing the level of trust of the network node(s) to determine a degree of trust of at least one path for routing the data, where the path(s) includes at least one of the network nodes.

Abstract: A transmission-based authentication system and method to prevent an unauthorized claimant from tracking a signal are disclosed herein. In one or more embodiments, the method involves transmitting, from at least one transmission source, a plurality of authentication signals. The method further involves receiving, from at least one receiving source, a resultant signal that includes at least two of the authentication signals. Further, the method involves authenticating, with at least one authenticator device, at least one claimant by comparing properties of the resultant signal the claimant receives from the receiving source location(s) to expected properties of the resultant signal that the claimant should receive from the receiving source location(s). The properties that are compared are signal power, doppler shift, time of reception, and/or signal modulation. The transmission source(s) is employed in at least one satellite and/or at least one pseudo-satellite.

Abstract: A system, method, and apparatus for the authentication of the physical location of a target node are disclosed herein. In one or more embodiments, the authentication of the target node's physical location is achieved by using ping ranging measurements obtained from the amount of time that elapses during ping messages being sent between the target node and at least one trusted node with a known physical location. The physical location of the trusted node(s) is obtained by using satellite geolocation techniques. The accuracy of the ranging measurements may be improved upon by using pre-coordination and/or priority determination of the ping messages being sent between the target node and the trusted node(s). In at least one embodiment, the ping messages are sent by dedicated ping response hardware that is associated with the target node and/or the trusted node(s). In some embodiments, the ping messages include a pseudo random code bit sequence.

Abstract: A generalized high performance navigation system is provided using low earth orbit (LEO) satellites. In one embodiment, a method of performing navigation includes receiving a LEO signal from a LEO satellite. The method also includes decoding a navigation signal from the LEO signal. The method further includes receiving first and second ranging signals from first and second ranging sources, respectively. In addition, the method includes determining calibration information associated with the first and second ranging sources. The method also includes calculating a position using the navigation signal, the first and second ranging signals, and the calibration information.

Abstract: Various techniques are provided for obtaining a precise absolute time using a satellite system. In one example, a method of transferring precise absolute time from a satellite to a device includes receiving data from a messaging channel, wherein the data has a frame structure. The method also includes using the data to identify the satellite and a position of the satellite, correcting for signal time of flight using the satellite identity and the position, and using the data as a time reference to align a receiver clock to the frame structure. The method also includes, with the receiver clock aligned to the frame structure, receiving a precision time signal from the satellite, wherein the precision time signal comprises a periodic repeating code. The method also includes determining a timing phase of the code and using the timing phase to determine a precise absolute time.

Abstract: A system, method, and apparatus for a network topology aided by a smart agent download are disclosed. The method involves authenticating, with at least one authenticator device, at least one claimant. The method further involves transmitting, by at least one transmission source, the smart agent download to at least one receiving source associated with at least one claimant. In one or more embodiments, at least one transmission source is employed in a Lower Earth Orbiting (LEO) Iridium satellite. Also, the method involves receiving, by at least one receiving source, the smart agent download. In addition, the method involves executing, by at least one processor, the smart agent download. Further, the method involves monitoring, by the smart agent download, network behavior. The monitoring of network behavior includes monitoring the users on the network, monitoring data passing through the network, and monitoring the quantity of data passing through the network.

Abstract: A system and method for verifying and/or geolocating network nodes in attenuated environments for cyber and network security applications are disclosed. The system involves an origination network node, a destination network node, and at least one router network node. The origination network node is configured for transmitting a data packet to the destination network node through at least one router network node. The data packet contains a security signature portion, a routing data portion, and a payload data portion. The security signature portion comprises a listing of at least one network node that the data packet travelled through from the origination network node to the destination network node. In addition, the security signature portion comprises geolocation information, identifier information, and timing information for at least one network node in the listing.

Abstract: System, methods, and devices for a self-sustaining differential corrections network that employs roving reference devices (RRDs) as reference stations for improving positioning, navigation, and timing (PN&T) solutions for other enabled local roving and/or stationary receiving devices (RDs) are disclosed herein. The disclosed differential correction system enhancement leverages RRDs enabled for a non-global positioning system (non-GPS), secondary PN&T signal to characterize local errors. These local errors are then used by local RDs in combination with a signal to calculate an improved PN&T estimate for the RDs.

Abstract: In one embodiment, a method to authenticate a claimant comprises receiving, from the claimant, at least one of a set of beam data from a spot beam transmission, comparing the claimed at least one set of beam data to a known valid data set, and authenticating the claimant when a difference between at least one set of beam data and the known valid data set is less than a threshold.

Abstract: Systems and methods according to one or more embodiments are provided for obtaining a precise absolute time using a satellite system. The precise absolute time may be used, for example, as an aid for positioning systems including navigation in attenuated or jammed environments. A method of obtaining precise absolute time transfer from a satellite according to an embodiment comprises: receiving a precision time signal from a satellite, wherein the precision time signal comprises a periodic repeating code; determining a timing phase of the code; receiving additional aiding information; and using the timing phase and the additional aiding information to determine a precise absolute time.

Abstract: A method, system, and apparatus are disclosed for cost functions for data transmission. In one or more embodiments, the method, system, and apparatus involve assigning costs associated with the data transmission corresponding to risks. The method, system, and apparatus further involve adjusting data transmission performance parameters according to the costs and the risks. The risks are associated with potential danger, harm, and/or data loss. Data transmission operation costs are related to available radio frequency (RF) bandwidth, data transmission levels of service (LoS) and/or data transmission quality of service (QoS). In at least one embodiment, each different LoS has an associated trigger boundary, which is located at a specific distance away from a risk area and indicates where and/or when to begin data transmission.

Abstract: A method and system are disclosed for providing an estimate of a location of a user receiver device. The method and system involve emitting from at least one vehicle at least one spot beam on Earth, and receiving with the user receiver device a signal from at least one spot beam. In one or more embodiments, at least one vehicle may be a satellite and/or a pseudolite. The method and system further involve calculating with the user receiver device the estimate of the location of the user receiver device according to the user receiver device's location within at least one spot beam. In some embodiments, when the user receiver device receives signals from at least two spot beams, the user receiver device calculates the estimate of the location of the user receiver device to be located in the center of the intersection of at least two spot beams.

Abstract: Systems and methods according to one or more embodiments are provided for obtaining a precise absolute time using a satellite system. The precise absolute time may be used, for example, as an aid for positioning systems including navigation in attenuated or jammed environments. A method of obtaining precise absolute time transfer from a satellite according to an embodiment comprises: receiving a precision time signal from a satellite, wherein the precision time signal comprises a periodic repeating code; determining a timing phase of the code; receiving additional aiding information; and using the timing phase and the additional aiding information to determine a precise absolute time.