FAST provides a method of “bootstrapping” a pseudo-range (PR) stage and one or more carrier-phase (CP) stages to quickly produce a highly accurate, high integrity receiver-to-receiver lever arm survey based on differential GNSS processing. The lever arm estimates of a previous stage are used to resolve the carrier phase ambiguities of the next stage. The method can be integrated with the warm-up of the integrity monitors to reduce the entire survey and warm-up startup time to 90 minutes or less, which is critical for mobile and make shift and precision approach and (automated) landing operations.

A low-earth orbit (LEO) satellite includes a global positioning receiver configured to receive first signaling from a first plurality of non-LEO navigation satellites. An inter-satellite transceiver is configured to send and receive inter-satellite communications with other LEO navigation satellites. At least one processor is configured to execute operational instructions that cause the at least one processor to perform operations that include: determining an orbital position of the LEO satellite based on the first signaling; and generating a navigation message based on the orbital position. A navigation signal transmitter configured to broadcast the navigation message to at least one client device, the navigation message facilitating the at least one client device to determine an enhanced position of the at least one client device based on the navigation message and further based on second signaling received from a second plurality of non-LEO navigation satellites.

A low-earth orbit (LEO) satellite includes a global positioning receiver configured to receive first signaling from a first plurality of non-LEO navigation satellites of a constellation of non-LEO navigation satellites in non-LEO around the earth. An inter-satellite transceiver is configured to send and receive inter-satellite communications with other LEO navigation satellites in a constellation of LEO navigation satellites. At least one processor is configured to execute operational instructions that cause the at least one processor to perform operations that include: determining an orbital position of the LEO satellite based on applying precise point positioning (PPP) correction data to the first signaling, wherein the PPP correction data is received separately from the first signaling; and generating a navigation message based on the orbital position. A navigation signal transmitter is configured to broadcast the navigation message to at least one client device, the navigation message facilitating the at least one client device to determine an enhanced position of the at least one client device based on the navigation message.

A node of a satellite constellation system includes a global positioning receiver configured to receive first signaling from a first plurality of non-LEO navigation satellites of a constellation of non-LEO navigation satellites in non-LEO around the earth. A transceiver is configured to send and receive inter-node communications with other nodes of the satellite constellation system. At least one processor is configured to execute operational instructions that cause the at least one processor to perform operations that include: determining a state of the node of the satellite constellation system based on applying precise point positioning (PPP) correction data to the first signaling, wherein the PPP correction data is received separately from the first signaling; and generating a navigation message based on the state of the node. A navigation signal transmitter is configured to broadcast the navigation message to at least one client device, wherein the client device is space-based, the navigation message facilitating the at least one client device to determine an enhanced position of the at least one client device based on the navigation message.

The disclosure provides methods, apparatus, and products for evaluating trustworthiness of GNSS-based location estimates. In one aspect, a method comprises obtaining observation information corresponding to one or more access points observed by a computing device during a time period; obtaining a GNSS-based location estimate indicating an estimated location of the computing device during at least a portion of the time period; determining an access points count corresponding to a number of the one or more observed access points that satisfy a distance criteria relative to the GNSS-based location estimate; comparing the determined access point count to a pre-defined threshold access points count; and based on results of the comparison, providing, by the processor, an indication of whether or not the GNSS-based location estimate is trustworthy. The method may be performed by one or more processors in a cloud-based computing system in response to an API call from the computing device.

The present disclosure provides a capability obtaining method, a capability sending method, a positioning server, and a device. The capability obtaining method is applied to the positioning server and includes: obtaining integrity capability information sent by a first device; wherein the integrity capability information is used for assisting the positioning server in performing a positioning operation, and the first device is a terminal or an access network side node; wherein the integrity capability information is used for indicating at least one of the following: a capability to support an integrity; a capability to support monitoring the integrity of a target object, indicating that the first device is capable of monitoring the integrity of the target object; or a capability to support a first-device-based integrity application of the target object.

Disclosed are systems and methods for a power management framework that can computationally minimize the power consumption of a device with Real-Time Kinematic (RTK) enabled. The disclosed framework can analyze the operating characteristics of a device (e.g., applications executing, movement, battery level, signal strength and current battery consumption of the device, and the like), which can provide an indication of the device's need for updated location information, and determine a frequency for updating RTK. Thus, the disclosed framework provides computerized mechanisms for the automatic optimization between the need for an RTK power update and the device's capabilities for actually performing the update.

Systems and methods for sharing convergence data between GNSS receivers are disclosed. Convergence data received at a GNSS receiver via a communication connection may be utilized to determine a position of the GNSS receiver.

An augmentation information adjustment unit (102) reduces an amount of information in augmentation information by combining: update cycle adjustment processing (1021) to set an update cycle of the augmentation information to be an integer multiple of a predetermined update cycle; geographic interval error value adjustment processing (1022) to reduce the number of geographic interval error values by selecting from among a plurality of the geographic interval error values each of which is an error at every predetermined geographic interval out of a plurality of error values, a geographic interval error value at every geographic interval that is an integer multiple of the predetermined geographic interval; and bit count adjustment processing (1023) to reduce a bit count of the error value for each error value. An augmentation information output unit (103) outputs, to an output destination, augmentation information after being reduced in the amount of information by the augmentation information adjustment unit (102).

In some embodiments, Satellite Positioning System (SPS) time information associated with at least one SPS may be maintained at a UE, which may also receive time information from a Wireless Wide Area Network (WWAN). In some embodiments, the UE may determine a corrected SPS time information for a first time based, in part, on the received WWAN time information, where the corrected SPS time information corrects the SPS time information associated with the at least one SPS maintained at the UE. The UE may initiate transmission of SPS timing assistance information to an associated device over a Wireless Personal Area Network (WPAN), wherein the SPS timing assistance information comprises the corrected SPS time information for the first time.