Abstract: A processor determines whether the remaining period until the expiration time of predicted ephemerides, which are predicted orbital information on navigation satellites, is a determination period or shorter. The determination period is set to at least the maximum term during which a subject is expected to be in a certain state. The processor causes an operation of acquiring actual ephemerides, which are actual orbital information on the navigation satellites, to be executed based on the positioning signals received when determination is made that the remaining period until the expiration time of the predicted ephemerides is the determination period or shorter, and determines the position of the subject based on the actual ephemerides acquired through the actual ephemeris acquiring operation.

Abstract: A sensor device includes at least one processor configured to execute processing including: communicating with a user terminal serving as a communication device, acquiring a current position by using prediction ephemeris, acquiring the prediction ephemeris from the user terminal, storing position information indicating the current position acquired, repeating, at intervals, acquiring communication device position information indicating the position of the user terminal and updating the position information based on the communication device position information, and shortening the interval for acquiring the communication device position information when a discrepancy, between the communication device position information and the stored position information prior to being updated is larger than a prescribed reference.

Abstract: A sensor device includes a processor configured to communicate with a user terminal as a communication apparatus that downloads positioning satellite information from a management server, acquires a current location by using the positioning satellite information, acquires action information indicating a result of an action of a user, and when the action information is acquired, instruct the user terminal to download the positioning satellite information from the management, and execute a process for acquiring a prediction ephemeris from the user terminal.

Abstract: A processor determines whether the remaining period until the expiration time of predicted ephemerides, which are predicted orbital information on navigation satellites, is a determination period or shorter. The determination period is set to at least the maximum term during which a subject is expected to be in a certain state. The processor causes an operation of acquiring actual ephemerides, which are actual orbital information on the navigation satellites, to be executed based on the positioning signals received when determination is made that the remaining period until the expiration time of the predicted ephemerides is the determination period or shorter, and determines the position of the subject based on the actual ephemerides acquired through the actual ephemeris acquiring operation.

Abstract: A satellite radiowave receiving device includes a receiver and a processor. The receiver acquires and receives radiowaves from a positioning satellite. The processor performing a positioning operation based on the radiowaves received by the receiver to obtain a current position of the satellite radiowave receiving device. The processor causes the receiver to stop an acquiring operation of radiowaves from a new positioning satellite under a predetermined condition while radiowaves are being acquired from a required number of positioning satellite for the positioning operation. If an error range of the obtained current position no longer satisfies a predetermined accuracy standard during a stop of the acquiring operation, the processor causes the receiver to resume the acquiring operation.

Abstract: A satellite radiowave receiving device includes a receiver and a processor. The receiver receives radiowaves from a positioning satellite. The processor performs a positioning operation based on the radiowaves received by the receiver to obtain a current position. The processor calculates an error range at the current position based on a positioning accuracy and a deviation. The positioning accuracy is obtained by combining each position of a plurality of positioning satellites and receiving state of radiowaves from each of the plurality of positioning satellites, and the deviation is a deviation of the current position and a predicted position calculated in accordance with a travelling state of the satellite radiowave receiving device.

Abstract: A positioning position is corrected more efficiently. A reception control device, comprising: a processor, wherein the processor executes: a reception parameter acquisition process of acquiring reception parameters related to reception of positioning signals from a positioning signal receiver that receives the positioning signals from positioning satellites; a first reception environment determination process of determining a reception environment on the basis of a result of determining the acquired reception parameters in accordance with determination conditions; and a reception control process of controlling an error correction signal receiver that receives an error correction signal for correcting an error of a positioning result by the positioning signals from an error correction satellite on the basis of a determination result in the first reception environment determination process.

Abstract: A positioning apparatus includes one or more processors; and one or more memories storing instructions that cause the processors to perform the following. Performing first receiving to receive one piece of orbit information showing a position of one positioning satellite and which attempts to receive another piece of orbit information showing a position of another positioning satellite. Performing first obtaining to obtain the another piece of orbit information (i) when receiving the another piece of orbit information is attempted but the another piece of orbit information is not received and the another piece of orbit information is received by the another positioning apparatus or (ii) when, the another piece of orbit information received by the another positioning apparatus is newer than that received in the first receiving. Performing positioning processing based on the one piece of received orbit information and the another piece of obtained orbit information.

Abstract: A positioning control apparatus is provided, which includes: an acquisition unit that acquires predictive ephemeris data from outside of the positioning control apparatus; a setup unit that sets up, based on a predetermined condition different from an expiration date that has been set up in the predictive ephemeris data, a switching condition as to whether the predictive ephemeris data acquired by way of the acquisition unit should be used for positioning calculation to calculate location information that indicates a current location of the positioning control apparatus; and a control unit that switches, based on the switching condition that has been set up by way of the setup unit, whether the predictive ephemeris data should be used for the positioning calculation.

Abstract: In a photographing system, a network camera transmits image information pertaining to an image captured by the network camera, a beacon transmits a beacon ID, a portable apparatus receives the beacon ID, generates tracking data which corresponds to the beacon ID on the basis of a reception status of the beacon ID and transmits the generated tracking data and a server receives the image information transmitted from the network camera and the tracking data transmitted from the portable apparatus and specifies images of parts relating to enter and leave times of an object from images in the image information on the basis of the image information and the tracking data.

Abstract: A positioning control method includes: determining whether a battery charge level is equal to or lower than a threshold; requesting an external device to acquire at least one positioning satellite information item according to a signal reception state of positioning satellites at a current location, from among positioning satellite information items of detectable positioning satellites, within a valid period of the positioning satellite information items, when the determining determines that the battery charge level is equal to or lower than the threshold; acquiring the at least one positioning satellite information item according to the requesting; and positioning the current location based on the acquired positioning satellite information item.

Abstract: A satellite radiowave receiving device includes a receiver and a processor. The receiver receives radiowaves from a positioning satellite. The processor performs a positioning operation based on the radiowaves received by the receiver to obtain a current position. The processor calculates an error range at the current position based on a positioning accuracy and a deviation. The positioning accuracy is obtained by combining each position of a plurality of positioning satellites and receiving state of radiowaves from each of the plurality of positioning satellites, and the deviation is a deviation of the current position and a predicted position calculated in accordance with a travelling state of the satellite radiowave receiving device.

Abstract: A satellite radiowave receiving device includes a receiver and a processor. The receiver acquires and receives radiowaves from a positioning satellite. The processor performing a positioning operation based on the radiowaves received by the receiver to obtain a current position of the satellite radiowave receiving device. The processor causes the receiver to stop an acquiring operation of radiowaves from a new positioning satellite under a predetermined condition while radiowaves are being acquired from a required number of positioning satellite for the positioning operation. If an error range of the obtained current position no longer satisfies a predetermined accuracy standard during a stop of the acquiring operation, the processor causes the receiver to resume the acquiring operation.

Abstract: A positioning position is corrected more efficiently. A reception control device, comprising: a processor, wherein the processor executes: a reception parameter acquisition process of acquiring reception parameters related to reception of positioning signals from a positioning signal receiver that receives the positioning signals from positioning satellites; a first reception environment determination process of determining a reception environment on the basis of a result of determining the acquired reception parameters in accordance with determination conditions; and a reception control process of controlling an error correction signal receiver that receives an error correction signal for correcting an error of a positioning result by the positioning signals from an error correction satellite on the basis of a determination result in the first reception environment determination process.

Abstract: Provided is a positioning system including: a storage apparatus configured to store orbit information indicating the position of a positioning satellite; and a positioning apparatus configured to perform a positioning process based on the orbit information, wherein the positioning apparatus includes an acquisition unit configured to acquire state-related information related to the state of the positioning apparatus, and a transmission unit configured to transmit, to the storage apparatus, the state-related information acquired by the acquisition unit, and the storage apparatus includes a receiving unit configured to receive the state-related information transmitted from the transmission unit, and an adjustment unit configured to adjust the content of the orbit information to be transmitted to the positioning apparatus, based on the state-related information received by the receiving unit.

Abstract: A positioning apparatus includes one or more processors; and one or more memories storing instructions that cause the processors to perform the following. Performing first receiving to receive one piece of orbit information showing a position of one positioning satellite and which attempts to receive another piece of orbit information showing a position of another positioning satellite. Performing first obtaining to obtain the another piece of orbit information (i) when receiving the another piece of orbit information is attempted but the another piece of orbit information is not received and the another piece of orbit information is received by the another positioning apparatus or (ii) when, the another piece of orbit information received by the another positioning apparatus is newer than that received in the first receiving. Performing positioning processing based on the one piece of received orbit information and the another piece of obtained orbit information.

Abstract: A positioning control apparatus is provided, which includes: an acquisition unit that acquires predictive ephemeris data from outside of the positioning control apparatus; a setup unit that sets up, based on a predetermined condition different from an expiration date that has been set up in the predictive ephemeris data, a switching condition as to whether the predictive ephemeris data acquired by way of the acquisition unit should be used for positioning calculation to calculate location information that indicates a current location of the positioning control apparatus; and a control unit that switches, based on the switching condition that has been set up by way of the setup unit, whether the predictive ephemeris data should be used for the positioning calculation.

Abstract: A GPS receiving apparatus and a computer readable storage medium are described. According to one implementation, the GPS receiving apparatus includes a GPS receiving unit, a storage unit, a position measuring unit, a reception control unit, and a movement judging unit. The storage unit stores GPS information. The reception control unit starts reception operation with a first or second mode. In the first mode, the GPS receiving unit uses the stored GPS information. In the second mode, the stored GPS information is not used. The movement judging unit judges whether the apparatus is moved a predetermined distance or more from a previous measured position. When the movement judging unit judges that the apparatus is moved the predetermined distance or more, the reception control unit starts reception operation with the second mode.

Abstract: A positioning control method includes: determining whether a battery charge level is equal to or lower than a threshold; requesting an external device to acquire at least one positioning satellite information item according to a signal reception state of positioning satellites at a current location, from among positioning satellite information items of detectable positioning satellites, within a valid period of the positioning satellite information items, when the determining determines that the battery charge level is equal to or lower than the threshold; acquiring the at least one positioning satellite information item according to the requesting; and positioning the current location based on the acquired positioning satellite information item.

Abstract: An electronic device includes a first positioning-information acquiring module, a second positioning-information acquiring module, and a switching control unit. The first positioning-information acquiring module acquires positioning information based on a first positioning system which is GPS. The second positioning-information acquiring module acquires positioning information based on a second positioning system which is GLONASS. The switching control unit determines the reception state of at least one of positioning information based on the first positioning system and positioning information based on the second positioning system. Based on this determination result, the switching control unit sets any one of positioning based on any one of the first positioning system and the second positioning system and positioning based on both of the first positioning system and the second positioning system.