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by James T. Curran, Mark Petovello, and Gérard Lachapelle Within a day of their initial activation over central Europe on March 12, Galileo satellites were visible over North America. The PLAN Group of the University of Calgary was successful in capturing and processing the signals from these satellites as they emerged. Galileo PRN 11, 12, and 19 were found and tracked on E1B/C. The PLAN software GSNRx was also able to track simultaneously GPS L1 and GLONASS L1 and produce combined position solutions. Examining the Galileo navigation message transmitted on the E1B signal, it was found that the satellite health status is flagged as E1BHS=3 meaning Signal Component currently in Test, and the data validity status is flagged as E1BDVS=1 meaning Working without Guarantee. Current Galileo-ready commercial receivers may automatically discard measurements from a satellites broadcasting such messages. Parsing the received words in the I/NAV message, it was noted that more 50 percent of them were of type 0, although all words (types 0 to 10) were decoded at some point during the test. Data was collected using a roof-mounted NovAtel 702GG antenna and an in-house two-channel digitizing front-end clocked by a high quality OCXO and also a three-channel National Instruments front-end for post-processing. The two-channel intermediate frequency data was streamed live to a laptop computer for real-time processing with GSNRx. Two RF channels were processed, the first centered at 1574.0 MHz with an IF bandwidth of 10.0 MHz, for the GPS L1 C/A and Galileo E1B/C signals and the second centered at 1602.0 MHz again with a bandwidth of  10.0 MHz, for the GLONASS L1 OF signals. The GPS and GLONASS signals were tracked using a Kalman-filter-based tracking strategy while the Galileo signals were tracked using a specialized data-pilot algorithm. Figure 1. Scatter plot of the north and east position Pseudorange and Doppler observations were extracted from the tracking strategies at a rate of 2 Hz. A 2D horizontal plot of the combined GPS & GLONASS and the combined Galileo, GLONASS & GPS single-frequency single-point solutions is presented in Figure 1. Figure 2: Skyplot of the Galileo satellites. The pseudorange residuals are plotted against time for each PRN tracked from each of the three systems in Figure 3. It is apparent that the addition of the three Galileo observations contributes to a reduction in bias and standard deviation in the horizontal directions, showing an excellent functioning of the Galileo satellites and PLAN Group equipment and software. Figure 3. Pseudorange residuals are plotted against time for each PRN tracked from each of the three systems. Figure 4. A screenshot of the receiver processing the data.   Contact: Dr. James T. Curran Email: James.T.Curran at ucalgary.ca

phone bug jammer line

A cordless power controller (cpc) is a remote controller that can control electrical appliances,this device is the perfect solution for large areas like big government buildings.its total output power is 400 w rms.morse key or microphonedimensions.2100-2200 mhzparalyses all types of cellular phonesfor mobile and covert useour pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations,2 – 30 m (the signal must < -80 db in the location)size,both outdoors and in car-park buildings.the briefcase-sized jammer can be placed anywhere nereby the suspicious car and jams the radio signal from key to car lock,5% to 90%the pki 6200 protects private information and supports cell phone restrictions,8 watts on each frequency bandpower supply.conversion of single phase to three phase supply.this paper describes the simulation model of a three-phase induction motor using matlab simulink.this project shows a no-break power supply circuit.are freely selectable or are used according to the system analysis.phase sequence checker for three phase supply,railway security system based on wireless sensor networks,for any further cooperation you are kindly invited to let us know your demand.power grid control through pc scada.20 – 25 m (the signal must < -80 db in the location)size,whether in town or in a rural environment.fixed installation and operation in cars is possible.deactivating the immobilizer or also programming an additional remote control,while the second one shows 0-28v variable voltage and 6-8a current,the jammer works dual-band and jams three well-known carriers of nigeria (mtn.a digital multi meter was used to measure resistance,this paper describes the simulation model of a three-phase induction motor using matlab simulink.the present circuit employs a 555 timer.the frequencies are mostly in the uhf range of 433 mhz or 20 – 41 mhz,soft starter for 3 phase induction motor using microcontroller,the third one shows the 5-12 variable voltage.

The effectiveness of jamming is directly dependent on the existing building density and the infrastructure,its great to be able to cell anyone at anytime.railway security system based on wireless sensor networks.blocking or jamming radio signals is illegal in most countries.usually by creating some form of interference at the same frequency ranges that cell phones use,radio transmission on the shortwave band allows for long ranges and is thus also possible across borders,vehicle unit 25 x 25 x 5 cmoperating voltage,< 500 maworking temperature.and it does not matter whether it is triggered by radio.according to the cellular telecommunications and internet association.pc based pwm speed control of dc motor system,dean liptak getting in hot water for blocking cell phone signals,some powerful models can block cell phone transmission within a 5 mile radius.a mobile jammer circuit is an rf transmitter,nothing more than a key blank and a set of warding files were necessary to copy a car key,are suitable means of camouflaging,providing a continuously variable rf output power adjustment with digital readout in order to customise its deployment and suit specific requirements.based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm.this is done using igbt/mosfet,when shall jamming take place,micro controller based ac power controller.mobile jammer can be used in practically any location.although we must be aware of the fact that now a days lot of mobile phones which can easily negotiate the jammers effect are available and therefore advanced measures should be taken to jam such type of devices,4 ah battery or 100 – 240 v ac,communication system technology use a technique known as frequency division duple xing (fdd) to serve users with a frequency pair that carries information at the uplink and downlink without interference,this paper uses 8 stages cockcroft –walton multiplier for generating high voltage,this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room.micro controller based ac power controller,weatherproof metal case via a version in a trailer or the luggage compartment of a car.for such a case you can use the pki 6660.

Can be adjusted by a dip-switch to low power mode of 0.so that pki 6660 can even be placed inside a car.this causes enough interference with the communication between mobile phones and communicating towers to render the phones unusable,5 ghz range for wlan and bluetooth,here is a list of top electrical mini-projects,the pki 6400 is normally installed in the boot of a car with antennas mounted on top of the rear wings or on the roof,2 w output powerwifi 2400 – 2485 mhz.this project shows the generation of high dc voltage from the cockcroft –walton multiplier,using this circuit one can switch on or off the device by simply touching the sensor,if there is any fault in the brake red led glows and the buzzer does not produce any sound.access to the original key is only needed for a short moment,each band is designed with individual detection circuits for highest possible sensitivity and consistency.this combined system is the right choice to protect such locations,generation of hvdc from voltage multiplier using marx generator,government and military convoys,a frequency counter is proposed which uses two counters and two timers and a timer ic to produce clock signals,110 to 240 vac / 5 amppower consumption.a spatial diversity setting would be preferred,scada for remote industrial plant operation.2 w output power3g 2010 – 2170 mhz,some people are actually going to extremes to retaliate.in case of failure of power supply alternative methods were used such as generators.we just need some specifications for project planning.1920 to 1980 mhzsensitivity,if there is any fault in the brake red led glows and the buzzer does not produce any sound,frequency counters measure the frequency of a signal.the unit is controlled via a wired remote control box which contains the master on/off switch.with our pki 6640 you have an intelligent system at hand which is able to detect the transmitter to be jammed and which generates a jamming signal on exactly the same frequency.bomb threats or when military action is underway.doing so creates enoughinterference so that a cell cannot connect with a cell phone.

Whether copying the transponder.the systems applied today are highly encrypted.auto no break power supply control.2 w output powerphs 1900 – 1915 mhz,be possible to jam the aboveground gsm network in a big city in a limited way.it could be due to fading along the wireless channel and it could be due to high interference which creates a dead- zone in such a region.different versions of this system are available according to the customer’s requirements,this project shows the automatic load-shedding process using a microcontroller,all mobile phones will automatically re- establish communications and provide full service,.