A microservice node can include a network real-time kinematics (RTK) device to receive raw satellite data associated with a physical reference station via a first message in a first message queue, to receive static virtual location data associated with a static virtual reference station (VRS) agent, to generate corrections data for the static VRS agent based on the raw satellite data and the static virtual location data, and to transmit the corrections data to the static VRS agent. The microservice node can include the static VRS agent to publish the corrections data in a second message in a second message queue. The microservice node can include an adapter device to determine that the client device is located within a geographic area associated with the static VRS agent and to transmit the corrections data from the second message queue to the client device.

The present disclosure relates to a method and an apparatus for establishing a positioning network. The positioning network includes a data processing center and at least one reference station, and one node in the positioning network represents one reference station. The method includes: determining, if a first historical positioning network capable of forming a new positioning network with a newly added node exists in a network list of the data processing center, whether the newly added node forms the new positioning network with the first historical positioning network; and determining, if the network list does not exist in the data processing center, whether the newly added node is capable of forming a new positioning network with nodes in a first node information list. Before network real-time kinematic (RTK) is formed, a user can use a single-baseline RTK positioning service. The network RTK is formed once a networking condition is met. A positioning network is gradually established, requirements of users may be satisfied with less investment when there are fewer users in the early stage, and the network is gradually formed with the increase of users, so that more users can be covered by using fewer base stations.

Existing networks of precisely surveyed GNSS receivers that are used for dGNSS or RTK positioning techniques can be used to measure GNSS time across a territory or region such as a country. The measured GNSS time base signals from each receiver are then fed back to a collating service, similar to the existing dGNSS/RTK systems, which also receives an accurate time base signal from a trusted third-party time base supplier which maintains a trusted time base. The collating service then compares the GNSS time signals from the network of GNSS receivers with the trusted time base and determines whether the GNSS time signals are accurate when compared to the trusted time base, and if they are not accurate, calculates the error. The collating service may provide the calculated error to users and the necessary correction that needs to be applied to measured GNSS time to obtain accurate UTC time.

A position measuring system includes: a connection destination candidate selecting unit which selects a connection destination candidate for each of a plurality of route coordinates on a route included in route information, on the basis of the distance between each of the plurality of route coordinates and reference stations included in a reference station list; and a connection destination information generating unit which determines a connection destination for which to acquire the correction information, on the basis of prescribed determining criteria, from among the connection destination candidates selected by the connection destination candidate selecting means, and generates and outputs connection destination information relating to the determined connection destination.

A position fix identifying a geographic location of a receiver is received. The position fix was generated using signals received at the receiver from respective high-altitude signal sources (such as satellites). Imagery of a geographic area that includes the geographic location is also received. The imagery is automatically processed to determine whether one or more of the high-altitude signal sources were occluded from the geographic location when the position fix was generated. In response to determining that one or more of the high-altitude signal sources were occluded from the geographic location when the position fix was generated, the position fix is identified as being potentially erroneous.

Techniques for transmitting global navigation satellite system (GNSS) correction data to a rover. GNSS signals are wirelessly received by a base station from one or more GNSS satellites. GNSS correction data is generated by the base station based on the GNSS signals. A beacon frame is formed by the base station to include a frame header, a frame body, and a frame check sequence (FCS). The frame body is formed to include the GNSS correction data. The beacon frame is wirelessly transmitted by the base station for receipt by the rover. The rover wirelessly receives the beacon frame. The GNSS correction data is extracted by the rover from the beacon frame. A geospatial position of the rover is calculated based on the GNSS correction data.

A position fix identifying a geographic location of a receiver is received. The position fix was generated using signals received at the receiver from respective high-altitude signal sources (such as satellites). Imagery of a geographic area that includes the geographic location is also received. The imagery is automatically processed to determine whether one or more of the high-altitude signal sources were occluded from the geographic location when the position fix was generated. In response to determining that one or more of the high-altitude signal sources were occluded from the geographic location when the position fix was generated, the position fix is identified as being potentially erroneous.

Base stations of a satellite navigation system have receivers Phase biases and instrumental and atmospheric errors, are determined and transmitted to navigation devices. Precise Point Positioning includes steps of: obtaining code and phase measurements which were performed on the satellite signals by the plurality of receivers at two or more frequencies, determining separate individual values for a plurality of phase ambiguities and a plurality of the errors based on the code and phase measurements, wherein the receivers are grouped into clusters, and in each cluster a determination of a single cluster solution is performed, in which satellite errors selected from the group of satellite position errors, satellite clock errors and satellite phase biases are determined based on the phase and code measurements performed by the receivers of the respective cluster; and a multi-cluster solution is performed, in which the single cluster solutions are adjusted.

Embodiments of this application provide a positioning method and apparatus. The method may include setting an ambiguity adjustment parameter for a mobile device, where the ambiguity adjustment parameter is used to record an ambiguity change status used to determine a virtual station observation value for the mobile device. The method may also include adjusting an observation value of a first primary datum station based on a first ambiguity adjustment parameter of the mobile device in a first serving cell to generate a first virtual station observation value, where the first primary datum station is a primary datum station of the first serving cell, and the first virtual station observation value is used to position the mobile device in the first serving cell; and sending the first virtual station observation value to the mobile device.

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.