Abstract: A method for updating a set of transformation information parameters used in a global navigation satellite system includes: obtaining at least one satellite navigation information for a satellite; and updating the set of transformation information parameters according to the obtained satellite navigation information. The method can extend the life time of the set of transformation information parameters, and used to generate better predictions of the satellite trajectory therefore the TTFF can be reduced while the positioning accuracy can also be improved.

Abstract: A receiver for receiving positioning signals from a plurality of sources obtains a pseudorange correction for each source by obtaining an initial pseudorange to each source, an initial value of a positioning parameter based on the initial pseudoranges, a difference between the initial value of the positioning parameter and a reference value of the positioning parameter, a parameter error for each one of the sources, and the pseudorange correction for each source based on the difference between the initial and the reference values of the positioning parameter, the parameter error for the source and the value.

Abstract: A global positioning satellite (GPS) receiver that includes a radio frequency (RF) receiver receiving a first GPS signal from a GPS satellite and a processor. The processor is configured to correlate the first GPS signal with a plurality of reference signals to produce a plurality of correlations, detect a transition between receiving the first GPS signal and receiving a second GPS signal from the GPS satellite based on a phase shift in the correlations, and if the transition is detected, compensate for the phase shift when computing a range to the GPS satellite.

Abstract: The present invention is directed to a system and a method for inspecting a subsea pipeline. The method comprises the steps: detecting a defect along the subsea pipeline using a subsea magnetometric tomography method (MTM) module adjacent the subsea pipeline; and determining a position of the subsea MTM module, thereby determining the position of the defect. The method further comprises determining the position of the subsea MTM module relative to a surface vessel; and determining an absolute position of the surface vessel.

Abstract: Apparatus for calculating the location of a receiver in a satellite navigation system, the apparatus being arranged to calculate a location of the receiver by means of an algorithm that utilises an estimate of receiver location and/or an estimate of absolute time, the apparatus being arranged to perform the calculation in such a way as to extend a convergence zone within which the algorithm is capable of generating the correct location for the receiver despite an error in the estimate(s).

Abstract: Reliable and efficient search windows are provided by allowing the adaptation of the code search window to be dependent on inaccuracy measures of relations between a cellular frame time and a satellite reference time. This inaccuracy is calculated in a positioning node of the cellular communications system, preferably by filtering of measurements received from user equipments. Linear trend Kalman filtering followed by post processing of estimation errors may be utilized. In order to ensure non-ambiguous interpretation of the received time stamps of received satellite signals provided by user equipments, a pseudo propagation delay is computed in both the user equipment and the positioning node based on GPS acquisition assistance data. The GPS time stamp is then defined referring to the determined pseudo propagation delay. In one embodiment, the pseudo propagation delay is assured to be situated within a pre-determined time interval.

Abstract: An apparatus for determining signal strength data within allocated GNSS frequency band(s) is provided. The apparatus includes a GNSS antenna. The GNSS antenna receives signals within the allocated GNSS frequency band. The apparatus further includes receiving circuitry. The receiving circuitry is for demodulating the received signals. The apparatus further includes a processor and memory for storing instructions, executable by the processor. The instructions include instructions for generating signal strength data for the received signals within the GNSS allocated frequency based on the demodulated signals, and for determining a position for a point of interest based upon the demodulated signals. Included in the apparatus is a display screen for displaying a graphical representation of the signal strength data of at least a portion of the at least one GNSS allocated frequency band.

Abstract: A GNSS receiver in a wake up state during a standby mode may acquire ephemeris from received GNSS signals such as GPS signals and/or GLONASS signals. When subsequently transitioning from the standby mode to a normal mode operating at a high frequency clock, the acquired ephemeris may be utilized to generate a navigation solution for the GNSS receiver. The GNSS receiver in the wake up state during the standby mode may be switched to operate at the high frequency clock in order to receive GNSS signals. The GNSS receiver may extract complete ephemeris from the received GNSS signals, and may subsequently transition from the wake up state to a sleep state during the standby mode to save power. Radio frequency front-end components of the GNSS receiver may only be turned on to receive the GNSS signals. The GNSS receiver may transition between the standby mode and the normal mode.

Abstract: In a method and system for deriving a seed position of a subscriber station in a wireless communications system in supporting unassisted GPS-type position determination is provided, the subscriber station receives overhead messages from the wireless communications system, and derives the seed position from the parameter values. The subscriber station may use a data structure in its memory and map possible parameter values to corresponding positions that may serve as the seed positions.

Abstract: A Radio Frequency Receiver on a Single Integrated Circuit (“RFSIC”) is described. The RFSIC may include a mixer, a phase-locked loop (“PLL”) in signal communication with the mixer, and an on-chip auto-tuned RF filter in signal communication with both the mixer and PPL, such that the same PLL simultaneously tunes the frequency of the VCO and the frequency response of the auto-tuned RF filter.

Abstract: An apparatus for determining a location of a receiver by using signals received by the receiver from a number of satellites, the apparatus being configured to, when the receiver has been unable to decode a time-of-transmission from the satellite signals, determine a location for the receiver by use of an algorithm that takes an estimate of the location of the receiver as an input, and, when an estimate of the location of the receiver is unavailable, determine an approximate location of the receiver in dependence on the satellite signals and input that approximate location into the algorithm as the estimate of the location of the receiver.

Abstract: An apparatus for determining the location of a receiver in dependence on signalling events transmitted to the receiver by a satellite constellation comprising a reference satellite and one or more other satellites, the apparatus being arranged to, for each of the one or more satellites, compare an indication of the transit time of the signalling event transmitted by that satellite and an indication of the transit time of the signalling event transmitted by the reference satellite and calculate the location of the receiver in dependence on those comparisons; the apparatus being further arranged to determine, for each of the satellites in the constellation, an indication of an error that would be incorporated in the comparisons if that satellite were selected as the reference satellite and to designate one of the satellites in the constellation as the reference satellite in dependence on those indications.

Abstract: An autonomous tracking device (1) for a vehicle, comprising: a support member (10) having a front face (11), a GPS module (2) having a GPS antenna (20), a transceiver (3) adapted to wirelessly send tracking data (30) with vehicle locations data to a remote unit, a rechargeable battery (8), a solar photocell array (4) placed on the front face or on the back face of the device, and adapted to supply the rechargeable battery, sticking means (5) extending on a portion of the front face (11) of the support member, adapted to be fixed to a surface of the dashboard or to an inner surface (26) of a windshield (25) of a vehicle.

Abstract: Apparatus for calculating the position of a receiver in dependence on the time it takes signalling events to travel from a plurality of satellites to the receiver, obtains an indication of a transit time for a signalling event to travel from each satellite to the receiver, and forms an indication of an expected transit time for a signalling event to travel from the satellite to the receiver. The obtained indication of the transit time and the indication of the expected transit time for each non-reference satellite are compared with the obtained indication of the transit time and the indication of the expected transit time for the reference satellite to form residuals that are representative of a combined error in those indications of expected transit time; and the position of the receiver is calculate without calculating the integer ambiguities in the obtained transit times, in dependence on the residuals.

Abstract: In one embodiment, a client device generates a location fingerprint. The fingerprint may include various data identified by scanning for WiFi network devices such as the MAC addresses of nearby WiFi access location as well as the respective signal strengths. For each fingerprint location, the client device attempts to use a GPS receiver to scan for GPS satellite signals and identify current GPS latitude and longitude coordinates. After a predetermined period of time, the success or failure of the attempt is recorded and included in the fingerprint. When the client device returns to the location, identified by reviewing the fingerprint, the client device may activate or inhibit the GPS receiver based on the success information of the fingerprint. If the stored data indicates a low success rate, other location identification techniques may be used.

Abstract: A positioning method includes: executing a first positioning mode or a second positioning mode, a first positioning process that is performed using a least-square method based on a positioning signal and a second positioning process that is performed using a Kalman filter based on the positioning signal utilizing a positioning result obtained by the first positioning process as a base value being performed in the first positioning mode, and the second positioning process being further performed in the second positioning mode utilizing a positioning result obtained by the second positioning process as a base value; determining accuracy of a positioning result obtained by the second positioning process performed in the executed positioning mode; and changing the positioning mode to be executed to the first positioning mode or the second positioning mode corresponding to the accuracy.

Abstract: We describe a device that is able to compute its range and time offset relative to another similar device, and thereby also a three-dimensional position, speed and time relative to other similar devices provided that at least four are present and within range. It does so by transmitting at least two signals at different frequencies and by receiving similar signals transmitted by the other devices. The signals are constructed so that they are independent of the radio band used and so that they lead to cancellation of common-mode effects in the transmitter and receiver circuits. No fixed infrastructure of transmitters, receivers or local measurement units is required and the devices do not need to be synchronized. The system scales to very large networks of devices in which they work collectively each solving a part of the problem that describes the relative positions of all interconnected devices.

Abstract: A dual-frequency DSP correlator receives I and Q signal components from a down convertor in a GNSS receiver system. The signal components are cross-wiped (de-spread) for noise cancellation and can be combined for use in a processor.

Abstract: The present invention relates to a system for resolving phase ambiguities in phase rate of change (PROC) measurements of a long baseline interferometer (LBI). The system includes an LBI having a first antenna and a second antenna positioned on a vehicle to receive the RF signal transmitted by the RF emitter, and a processor positioned on the vehicle. The processor is configured to determine a first phase rate of change (PROC) of the RF signal received by the LBI over a short time interval to produce a short time interval range estimate of the RF emitter, determine a second PROC of the RF signal received by the LBI over a long time interval which is greater than the short time interval, to produce a plurality of ambiguous long time interval range estimates of the RF emitter, and c) select one of the plurality of long time interval range estimates based on the short time interval range estimate.

Abstract: A method of calculating a position fix from satellite signal samples. The method comprises: obtaining first reference information produced during the calculation (120a) of a first position fix, the first position fix being the calculated position of a satellite-positioning receiver (5) at a first time; obtaining second reference information produced during the calculation (120b) of a second position fix, the second position fix being the calculated position of the receiver (5) at a second time; receiving a set of satellite signal samples generated by the receiver at a third time, or ranging measurements derived from such a set of satellite signal samples; and processing (140) the set of samples or the ranging measurements to calculate a third position fix. The processing (140) is assisted by the reference information produced during the calculation of the first and second position fixes.

Abstract: A method of calculating two position fixes, using satellite positioning. The method comprises: using an RF front-end (12), receiving satellite positioning signals; using an analogue-to-digital converter (18), sampling the received signals to generate signal samples; using a processor (20), processing a first set of the samples as they are generated, to calculate a first position fix; storing information associated with the calculation in a memory (22); storing a second set of the samples, or ranging measurements derived from the second set of samples, in the memory (22) for later processing to calculate a second position fix; and later, processing the second set of samples to calculate the second position fix, wherein the calculation of the second position fix is assisted by the information associated with the calculation of the first position fix. Also disclosed are other related methods and apparatus.

Abstract: A tracking and mapping system for outdoor use includes a first GPS locator located either at a base station or on a hunting accessory such as an arrow. The system also includes a second GPS locator for identifying a user's location, and an electronic display unit for communicating with a global positioning satellite and displaying a map showing icons representing locations of the first and second GPS locators. The second GPS locator may be embedded in the electronic display unit, which may be a mobile wireless handheld device, a tablet or other portable computer having wireless connectivity. The electronic display unit maps the present location of each of the GPS locators in relation to a direction such as north, south, east or west. Optionally, separate GPS locators may be placed at a base station and in an arrow. A method of using the tracking and mapping system is also described.

Abstract: Methods and systems to detect navigation signals, including to identify up to multiple range-Doppler hypotheses from each of j range-Doppler correlation grids based on a relatively low first threshold, generate navigation solutions from combinatorial sets of k of the identified hypotheses, evaluate the navigation solutions to identify plausible solutions, iteratively and combinatorially augment the plausible solutions with additional hypotheses from grids that are not represented in the corresponding k-hypotheses based navigation solutions, replace plausible solutions with corresponding augmented plausible solutions when appropriate, and select one of a plurality of plausible solutions as a best plausible solution, j and k being positive integers. Where a grid energy peak exceeds a second threshold, a corresponding hypothesis may be identified as a sole hypothesis for the corresponding navigation signal. The relatively low first threshold permits detection of weaker signals.

Abstract: A method of calculating a position of a GPS receiver, a recording medium having recorded thereon a program for performing the method, and a GPS receiver are discussed. The method includes causing a control unit to combine a plurality of satellite signals received through the use of a receiver unit and to create a plurality of satellite signal groups; selecting a low-error satellite signal group not including any GPS satellite signal causing a reflection error or including the GPS satellite signal causing a reflection error as little as possible by the use of pseudoranges based on the GPS satellite signals included in the satellite signal groups; detecting the GPS satellite signal not included in the low-error satellite signal group as a reflected satellite signal; and calculating a positional coordinate of the GPS receiver by the use of the GPS satellite signals other than the reflected satellite signal.

Abstract: A method for mitigating the effects of multipath errors in GNSS devices is provided. Signals from GNSS satellites are received. Image data from an image sensor is received. Orientation data from an orientation sensor is received. The orientation data describes the orientation of the image sensor. Obstruction data is determined based on the image data. The obstruction data includes an obstruction region that indicates the sky in that region is obstructed by a structure. Based on the orientation data, obstruction data, and GNSS satellite location data, the position of GNSS satellites with respect to the obstruction region is determined. The location of the GNSS device is determined based on signals from some of the GNSS satellites and the position of GNSS satellites with respect to the obstruction region.

Abstract: A GNSS receiver in a wake up state during a standby mode may acquire ephemeris from received GNSS signals such as GPS signals and/or GLONASS signals. When subsequently transitioning from the standby mode to a normal mode operating at a high frequency clock, the acquired ephemeris may be utilized to generate a navigation solution for the GNSS receiver. The GNSS receiver in the wake up state during the standby mode may be switched to operate at the high frequency clock in order to receive GNSS signals. The GNSS receiver may extract complete ephemeris from the received GNSS signals, and may subsequently transition from the wake up state to a sleep state during the standby mode to save power. Radio frequency front-end components of the GNSS receiver may only be turned on to receive the GNSS signals. The GNSS receiver may transition between the standby mode and the normal mode.

Abstract: A device for monitoring athletic performance of a user has a wristband configured to be worn by the user. The electronic module may include a controller and a screen and a plurality of user inputs operably associated with the controller. The user inputs may include a user input configured to be applied by the user against the screen and in a direction generally normal to the screen. The controller may further be configured to generate one or more user interfaces in response to various user inputs and conditions. For example, the controller may generate workout mode interfaces and non-workout mode interfaces including various goal information, workout data, reminders and the like. In one or more arrangements, multiple types of information may be displayed simultaneously.

Abstract: A method for controlling a global navigation satellite system (GNSS) receiver operated in a first operation state includes: providing a state switching criterion; obtaining a positioning information; determining whether to switch from the first operation state to a second operation state according to the obtained positioning information and the state switching criterion, wherein the power consumption of the GNSS receiver operating under the first operation state and the second operation state is different.

Abstract: A method and apparatus for computing position using a regional-terrain model is provided. The method includes obtaining from at least three satellites pseudorange measurements, computing a transitional position by using a default altitude with a large uncertainty, using this transitional position to obtain from a terrain model altitude information associated with a region, and computing an accurate three-dimensional position as a function of the pseudorange measurements and the altitude information. The region defines a boundary, and the boundary includes the transitional position.

Abstract: A Wide Area Sensor Network is disclosed that utilizes wideband software defined radios (SDRs) to provide a capability to monitor the airwaves over a wide frequency range, detect when critical frequencies are being jammed or otherwise interfered with, and locate the source of the interference so that the interference can be eliminated. In addition, a diversity receiver is disclosed. The diversity receiver generates position, time and frequency references for use in locating and synchronizing sensor platforms of a WLS. In an illustrative embodiment, the diversity receiver comprises a first receiver subsystem comprising a terrestrial broadcast receiver, and a common processor platform (CPP) coupled via first link means to the first receiver subsystem. The first receiver subsystem provides a stable time reference and position information to the CPP via the first link means.

Abstract: A method, device and system for determining a receiver location using weak signal satellite transmissions. The invention involves a sequence of exchanges between an aiding source and a receiver that serve to provide aiding information to the receiver so that the receiver's location may be determined in the presence of weak satellite transmissions. With the aiding information, the novel receiver detects, acquires and tracks weak satellite signals and computes position solutions from calculated pseudo ranges despite the inability to extract time synchronization date from the weak satellite signals. The invention includes as features, methods and apparatus for the calibration of a local oscillator, the cancellation of cross correlations, a Doppler location scheme, an ensemble averaging scheme, the calculation of almanac aiding from a table of orbit coefficients, absolute time determination, and a modified search engine.

Abstract: A method of controlling a navigation apparatus, and which includes measuring, via a sensor, an environmental characteristic including at least one of an altitude of the navigation apparatus and an atmospheric pressure of an atmosphere the navigation apparatus is operating in; extracting, via a controller, a hearing characteristic including a degree of hearing impairment for a user operating the navigation apparatus from a memory based on the measured environmental characteristic; and compensating, via the controller, audio output by the navigation apparatus using the extracted degree of hearing impairment for the user operating the navigation apparatus.

Abstract: An apparatus for determining signal strength data within at least one allocated GNSS frequency band is provided. The apparatus includes a GNSS antenna. The GNSS antenna receives signals within the allocated GNSS frequency band. The apparatus further includes receiving circuitry. The receiving circuitry is for demodulating the received signals. The apparatus further includes a processor and memory for storing instructions, executable by the processor. The instructions include instructions for generating signal strength data for the received signals within the GNSS allocated frequency based on the demodulated signals, and for determining a position for a point of interest based upon the demodulated signals. Included in the apparatus is a display screen for displaying a graphical representation of the signal strength data of at least a portion of the at least one GNSS allocated frequency band.

Abstract: In a method for refining a position estimate of a low earth orbiting (LEO) satellite a first position estimate of a LEO satellite is obtained with a GNSS receiver on-board the LEO satellite. The first position estimate is communicated to a Virtual Reference Station (VRS) processor. VRS corrections are received at the LEO satellite, the VRS corrections having been calculated for the first position estimate by the VRS processor. The VRS corrections are processed on-board the LEO satellite such that a VRS corrected LEO satellite position estimate of the LEO satellite is generated for the first position estimate.

Abstract: Methods and apparatus are provided for reporting quality of GNSS position fixes. A desired quality mode selection is obtained. Position fixes with respective precision estimates and satellite tracking information are obtained. For each of a plurality of position fixes a current positioning quality is determined, based on the precision estimates and satellite tracking information and quality mode selection. Current positioning quality is reported. The quality selection can be a preference of availability over accuracy, or accuracy over availability, or a balance of availability and accuracy.

Abstract: A satellite signal reception device has a reception unit that receives a satellite signal transmitted from a positioning information satellite, a reception state display device for displaying the satellite signal reception state, a reception state evaluation unit that determines the reception condition of the satellite signal received by the reception unit, and a display controller that controls the reception state display device to display the reception condition determined by the reception state evaluation unit. The reception state evaluation unit determining the level of the reception condition based on the number of positioning information satellites from which satellite signals are received and the signal level of each received signal, and the display controller displaying the reception level output by the reception state evaluation unit on the reception state display device.

Abstract: In a method for refining a position estimate of a low earth orbiting (LEO) satellite a first position estimate of a LEO satellite is obtained with a GNSS receiver on-board the LEO satellite. The first position estimate is communicated to a Virtual Reference Station (VRS) processor. VRS corrections are received at the LEO satellite, the VRS corrections having been calculated for the first position estimate by the VRS processor. The VRS corrections are processed on-board the LEO satellite such that a VRS corrected LEO satellite position estimate of the LEO satellite is generated for the first position estimate.

Abstract: A mobile storage unit is disclosed. The mobile storage unit includes a rigid exo-skeletal frame and a flexible storage bag that couples to the rigid exo-skeletal frame while within an open storage region framed by the exo-skeletal frame. The mobile storage unit also includes a top seat portion and stabilizing features that extend and retract from the rigid exo-skeletal frame to support the mobile storage unit in the upright position. The mobile storage unit can also include a monitoring device for transmitting signals that are used to determine the location of the mobile storage unit.

Abstract: A GNSS receiver includes a radio frequency module and an antenna for acquiring and tracking signals from various satellites and demodulating them to an intermediate frequency or a baseband signal. The receiver also includes a processing unit for processing the demodulated signals to obtain a first position, velocity, and time (PVT fix) data and displays the data to a user. The receiver may include a memory unit for storing the obtained PVT fix. The receiver may further include one or more sensors for detecting a motion of the receiver and provide an index to the processing unit that determines a next position of the receiver based on the index during a coverage gap. The one or more sensors may include an accelerometer, a compass, or a combination thereof.

Abstract: A system and a method for determining the correct position for a GPS device from a predefined set of alternatives are provided. Based on the known positions of the visible GPS satellites and of the predefined alternative locations, the system determines theoretical distances between each satellite and each location and/or differences thereof. These distances are related to the distance measured between the GPS device antenna and each GPS satellite in order to choose the location from among the predefined location alternatives. Also disclosed are a system and a method for identification of predefined container slots on a freight yard.

Abstract: A Global Positioning System (GPS) receiver includes a GPS receiving unit configured to receive navigation data from at least one visible satellite, a decoder configured to decode the received navigation data to extract time and almanac information from the decoded navigation data and a database configured to store satellite disposition information. A satellite location determining unit is configured to select at least one visible satellite candidate using the time information and the satellite disposition information, and to determine locations-in-space of the at least one visible satellite candidate with the almanac information. Also, a navigation filter is configured to calculate pseudo-ranges from the at least one visible satellite and the selected at least one visible satellite candidate using the corresponding locations-in-space, and to determine a location of the GPS receiver using the calculated pseudo-ranges.

Abstract: Vehicle position information providing devices, methods, and programs acquire a first current position of a vehicle based on a radio signal received from a GPS satellite and acquire a second current position of the vehicle based on a signal received by a communication device that communicates over a mobile phone network. The devices, methods, and programs determine whether the first current position and the second current position coincide. If the first current position and the second current position do not coincide, the devices, methods, and programs cause the communication device to transmit information relating to the first current position to an information center.

Abstract: A system mounted to an object for detecting repetitive motion of the object. The system includes a GPS receiver for receiving GPS signals while being maneuvered in a repetitive motion by the object, and a processor for detecting repetitive phase shifts in the received GPS signals. In general, the system computes the repetitive motion of the GPS receiver based on the repetitive phase shifts.

Abstract: Embodiments of the present invention recite a system having Doppler-based control of a mobile device. In one embodiment, at least one measured Global Navigation Satellite System (GNSS) Doppler frequency shift measurement corresponding to a GNSS signal measured at a mobile electronic device is received. The speed of the remote device is then determined based at least in part upon the GNSS Doppler frequency shift measurement. An operation of the remote device is then controlled from the base station when the speed of the remote device exceeds a speed threshold.

Abstract: A wireless subscriber unit for a tracking and locating system and method is disclosed. The locating system provides positional information of remote locator devices in the form of images viewable by subscribers over a network.

Abstract: A method and system of improving Global Navigation Satellite System (GNSS) results by compensating for antenna tilt in determining the location of the GNSS receiver is disclosed. In general, the angle of tilt of the antenna is determined. The actual elevation of a satellite is determined. The effective elevation of the satellite relative to the antenna is then calculated.

Abstract: A target identification device in a user object includes: a user information obtaining part and a target information obtaining part obtaining a position, a speed over ground and a course over ground of the user object and a target object; a processor that calculates a CPA distance and a TCPA with respect to the target object relative and the user object, based on the positions, the speeds over ground and the courses over ground of the user object and the target object. The processor replaces the course over ground of the user object with a direction toward the target object and calculates the CPA and the TCPA when the speed over ground of the user object is a low speed determination value or less.

Abstract: A method and a system of determining the deviation of dynamic position are provided. The determining method includes the follow steps. First, a server receives a plurality of first position data from a first mobile device. Next, the server receives a plurality of second position data from a second mobile device. Then, the server transmits the first position data to the second mobile device. Thereon, the server transmits the second position data to the first mobile device. Later, the server determines whether the first mobile device and the second mobile device deviate from each other according to the first position data and the second position data.

Abstract: A secure location system is described herein that leverages location-based services and hardware to make access decisions. Many mobile computers have location devices, such as GPS. They also have a trusted platform module (TPM) or other security device. Currently GPS location data is made directly accessible to untrusted application code using a simple protocol. The secure location system provides a secure mechanism whereby the GPS location of a computer at a specific time can be certified by the operating system kernel and TPM. The secure location system logs user activity with a label indicating the geographic location of the computing device at the time of the activity. The secure location system can provide a difficult to forge, time-stamped location through a combination of kernel-mode GPS access and TPM security hardware. Thus, the secure location system incorporates secure location information into authorization and other operating system decisions.

Abstract: An electronic device having a system for tracking and monitoring to recover and/or service topography equipment. The electronic device is hidden within the topography equipment by a certified technician and is registered in an operating center. When desired by the operating center, a SIM card connects through a cell phone carrier to enable monitoring and geographic localization of the topography equipment by the operating center, whereby a GPS antenna receives the signal from a satellite via a modem. Therefore, the owner, authorized personnel and/or police officer(s) can then track the signal and locate the topography equipment for recovery and/or service maintenance.