Improved methods and systems for position acquisition and/or monitoring are disclosed. The position acquisition and/or monitoring can be performed with improved intelligence so that data acquisition, transmission and/or processing is reduced. As a result, the position acquisition and/or monitoring is able to be performed in a power efficient manner.

Improved methods and systems for position acquisition and/or monitoring are disclosed. The position acquisition and/or monitoring can be performed with improved intelligence so that data acquisition, transmission and/or processing is reduced. As a result, the position acquisition and/or monitoring is able to be performed in a power efficient manner.

A method for cycling GPS computations is described in which, at a beginning of a cycle, N computing devices are determined to be members of a device group. At each of N points within the cycle: a target device of the N computing devices is instructed to compute its target location data; another member of the device group is instructed to refrain from computing its other location data; target location data is received from the target device; and the target location data is transmitted to each other member of the device group.

A method for cycling GPS computations is described in which, at a beginning of a cycle, N computing devices are determined to be members of a device group. At each of N points within the cycle: a target device of the N computing devices is instructed to compute its target location data; another member of the device group is instructed to refrain from computing its other location data; target location data is received from the target device; and the target location data is transmitted to each other member of the device group.

An assisted satellite positioning system based on detecting signals from a number of satellites includes: (a) a mobile receiver; and (b) a base station communicating with the receiver over a low-power wireless communication network, the base station providing ephemeris data of a selected number of the satellites, but not all, using a compressed data format. The ephemeris data may include data concerning doppler frequency variations or elevation variations of the selected satellites over a predetermined time interval. The doppler frequency variations and the elevation variations may be represented in the compressed format by coefficients of a polynomial function of time. The polynomial function may be weighted to have lesser relative errors in larger doppler frequencies than lesser doppler frequencies, or to have lesser relative errors in lesser elevations than larger elevations. In one implementation, the low-power wireless communication network—such as a LoRa network—that has a range of at least 10 miles.

An assisted satellite positioning system based on detecting signals from a number of satellites includes: (a) a mobile receiver; and (b) a base station communicating with the receiver over a low-power wireless communication network, the base station providing ephemeris data of a selected number of the satellites, but not all, using a compressed data format. The ephemeris data may include data concerning doppler frequency variations or elevation variations of the selected satellites over a predetermined time interval. The doppler frequency variations and the elevation variations may be represented in the compressed format by coefficients of a polynomial function of time. The polynomial function may be weighted to have lesser relative errors in larger doppler frequencies than lesser doppler frequencies, or to have lesser relative errors in lesser elevations than larger elevations. In one implementation, the low-power wireless communication network—such as a LoRa network—that has a range of at least 10 miles.

An information sending method includes: obtaining first information for positioning a terminal device, the first information comprising differential positioning information, or the first information comprising at least one of environmental information or a satellite positioning signal, and differential positioning information; and when the first information satisfies a preset condition, sending the differential positioning information to the terminal device. The method can effectively reduce the sending of unnecessary differential positioning information, thereby avoiding unnecessary energy consumption waste of a roadside device and the terminal device, saving the time of the terminal device to calculate position information, and improving the high-precision positioning efficiency of the system.

Systems and methods are provided for weapon system monitoring, historical usage analysis, and performance evaluation of a plurality of assets within a deployment location, where each asset of the plurality includes one or more sensors that record operational information of each asset and are used to produce at least one signal, including a server device running application software that uses the signal received from each asset to detect and store situational state data of each asset and performance level data of a party associated with each asset, and a machine learning system that uses the situational state data and the performance level data to determine an operational profile of the party.

A satellite radio wave receiving device including: one or more processors configured to: cause a receiver to start a receiving operation of receiving radio waves from positioning satellites; perform a current position calculation to calculate a current position based on the radio waves received; calculate a positioning accuracy of the current position; decide whether or not to adopt the current position based on a number of positioning satellites from which the receiver has received radio waves and the positioning accuracy; in response to deciding to adopt the current position, cause the receiver to stop the receiving operation; and in response to deciding to not adopt the current position, cause the receiver to continue the receiving operation of receiving radio waves from the positioning satellites and repeat performance of the current position calculation to calculate current positions based on the radio waves received during the continued receiving operation.

A satellite radio wave receiving device including: one or more processors configured to: cause a receiver to start a receiving operation of receiving radio waves from positioning satellites; perform a current position calculation to calculate a current position based on the radio waves received; calculate a positioning accuracy of the current position; decide whether or not to adopt the current position based on a number of positioning satellites from which the receiver has received radio waves and the positioning accuracy; in response to deciding to adopt the current position, cause the receiver to stop the receiving operation; and in response to deciding to not adopt the current position, cause the receiver to continue the receiving operation of receiving radio waves from the positioning satellites and repeat performance of the current position calculation to calculate current positions based on the radio waves received during the continued receiving operation.