Abstract: A receiver for a multi-mode navigation system includes a base band unit and a calculation unit. The base band unit is configured for allocating resources to positioning satellites in each of one or more navigation system, and tracking the positioning satellites with the allocated resources to obtain satellite information of each of the positioning satellites. The satellite information includes one or more of pseudo-ranges, position coordinates, velocity information, and frequency information of the positioning satellites. The calculation unit is configured for receiving the satellite information from the base band unit, evaluating the positioning satellites in each navigation system, and determining a positioning parameter of the receiver. Determination of the positioning parameter includes calculating a position and a velocity of the receiver based on the satellite information according to a least square algorithm.

Abstract: A method for evaluating satellite positioning quality and a satellite receiver are disclosed. Satellite information is obtained from one or more satellites of the set of satellites. The satellite information includes an observed value of a parameter of each of the one or more satellites. An estimated value of each observed value is determined based on the satellite information. A set of residual values between the estimated values and the observed values is obtained. A positioning quality associated with the set of satellites is determined based on the set of residual values.

Abstract: The present disclosure discloses an ephemeris collection device and a method of collecting ephemeris data. The ephemeris collection device may include a data storage unit, configured to store a first part of a first ephemeris subframe if a synchronization of the first ephemeris subframe is not completed; and a subframe merge unit, coupled with the data storage unit and configured to receive a second part of the first ephemeris subframe from the subframe synchronizer and retrieve the first part of the first ephemeris subframe from the data storage unit during a subsequent transmission of the first ephemeris subframe. A complete first ephemeris subframe is obtained based on the first part and the second part of the first ephemeris subframe.

Abstract: A positioning module is disclosed. Positioning module includes a satellite selection module and a filter. The satellite selection module is configured for selecting one or more positioning satellites among a plurality of satellites of one or more satellite navigation systems and outputting satellite information of the one or more positioning satellites. Filter coupled to the satellite selection module is configured for receiving the satellite information of the one or more positioning satellites, and calculating a position information of positioning module.

Abstract: Method, apparatus, and programs for synchronizing navigation data. A distance between a navigation device and a receiver is estimated. The receiver receives navigation data from the navigation device. A sending time of the navigation data sent from the navigation device is then determined based on the estimated distance between the navigation device and receiver. Synchronization information is computed based on the sending time of the navigation data. The synchronization information is used for synchronizing the navigation data.

Abstract: Method, apparatus, and programs for synchronizing navigation data. First synchronization information is obtained from a receiver. The first synchronization information was used for synchronizing first navigation data received by the receiver from a navigation device. A sending time of second navigation data sent from the navigation device is then determined based on the first synchronization information. Second synchronization information is computed based on the sending time of the navigation data. The second synchronization information is used for synchronizing the second navigation data.

Abstract: Method, apparatus, and programs for synchronizing navigation data. Data synchronization is established between a receiver and a navigation device based on matching of a header of navigation data. The receiver receives the navigation data from the navigation device. If, subsequently, the data synchronization is interrupted, information related to the data synchronization from the receiver is retrieved. The data synchronization is then re-established between the receiver and the navigation device based on the retrieved information.

Abstract: Method, apparatus, and programs for synchronizing navigation data. A first distance between a first navigation device and a receiver and a second distance between a second navigation device and the receiver are estimated. The receiver receives first and second navigation data from the first and second navigation devices, respectively. Based on a first sending time of the first navigation data sent from the first navigation device and the first and second distances, a second sending time of the second navigation data sent from the second navigation device is then determined. Synchronization information of the second navigation device is computed based on the second sending time of the second navigation data. The synchronization information is used for synchronizing the second navigation data received at the receiver.

Abstract: A socket connector includes an insulative housing, at least one power contact received in the insulative housing, at least one ground contact received in the insulative housing and at least one signal contact received in the insulative housing. The insulative housing includes an upper wall, a lower wall opposite to the upper wall and a pair of lateral walls connecting the upper wall and the lower wall. The insulative housing includes a first receiving recess defined cooperatively by the upper wall, the lower wall and the lateral walls, a complementary section formed in the first receiving recess with a second receiving recess defined therein.

Abstract: A power connector mountable on a circuit board, includes an insulating housing, a conductive pin and a pair of spring contacts received in the insulating housing. The insulating housing defines a central channel extending therethrough along a lengthwise direction thereof, and a passageway positioned besides and communicating with the central channel. The insulating housing has a pair of heat dissipation cavities extending through the insulating housing along a longitudinal direction of the insulating housing.

Abstract: A power connector mountable on a circuit board, includes an insulating housing, a conductive pin and a pair of spring contacts received in the insulating housing. The insulating housing defines a central channel extending therethrough along a lengthwise direction thereof, and a passageway positioned besides and communicating with the central channel. The insulating housing has a pair of heat dissipation cavities extending through the insulating housing along a longitudinal direction of the insulating housing.

Abstract: A moving information determination apparatus includes an ECA (Earth Center Assistant) information acquisition module, an altitude information and position information storage module and a moving information calculation module. The altitude information and position information storage module provides initial position information of the moving information determination apparatus and altitude information of the moving information determination apparatus. The ECA acquisition module obtains a radius of the Earth at the current position of the moving information determination apparatus. The moving information calculation module calculates the current position and/or velocity of the moving information determination apparatus based on the radius of the Earth and a plurality of signals from a plurality of satellites.