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Plus: GLONASS CDMA Tracked, Third Beidou-2 Launched The second report from non‐governmental members of the LightSquared/GPS Technical Working Group (TWG) was filed with the Federal Communications Commission (FCC) on April 15. For those anxious to see actual results of interference/desensitization of GPS receivers by the proposed LightSquared terrestrial signal — or, conversely, absence of said results — the report does not contain any such hard news. It relates the set-up of TWG work sub-teams to test various categories of GPS devices and receivers. The sub-teams have identified laboratories for testing activities, developed test plans, and identified devices, receivers, and systems to be tested. Attachments to the report include current draft test plans and the current list of devices and receiver models submitted for testing by companies. The following sections summarize the testing laboratories and devices selected for testing by each sub-team: aviation cellular general location/navigation high precision, networks, and timing. These three sub-teams are collaborating to a large extent. space-based receivers. The full report also includes a “high-level description of test plan” by each sub-team. Aviation Sub‐Team. The aviation sub‐team will rely primarily on testing, funded by the Federal Aviation Administration (FAA), that will be performed at Zeta Associates Incorporated of Fairfax, Virginia. Additional testing is planned by the U.S. government at White Sands Missile Range and Holloman Air Force Base, both in New Mexico, for use by the National PNT Engineering Forum (NPEF) LightSquared Working Group. These results will be considered for inclusion in the TWG Final Report by the aviation sub‐team. Presumably, this group will test military receivers, under classified categorization. The aviation receivers are representative of those in use today. Their selection was based mainly upon device availability (those already owned by the FAA Technical Center). They are: Canadian Marconi GLSSU 5024; Garmin 300XL; Garmin GNS 430W; Garmin GNS 480; Rockwell Collins GLU‐920 multimode receiver; Rockwell Collins GLU‐925 multimode receiver; Rockwell Collins GNLU‐930 multimode receiver; Symmetricomm timing card (used for an FAA automation system); WAAS NovAtel G‐II ground reference station; and Zyfer timing receiver (used for the WAAS ground network). Cellular Sub‐Team. The cellular sub‐team is in the process of engaging PC TEST, Columbia, Maryland; CETECOM, Milpitas, California; InterTek, Lexington, Kentucky; and ETS Lindgren, Cedar Park, Texas, for device testing. The cellular sub‐team expects to test approximately 50 different device models. The selections represent current and legacy devices and have been prioritized based on sales volumes. While it is expected that there will be some representation of data‐only devices and femtocells, the testing will focus largely on handheld devices. Those designated for testing are: Apple iPhone 4 (GSM and CDMA); HTC A6366; HTC ADR6200; HTC ADR63002; HTC ADR63003; HTC ADR6400L; HTC Touch Pro 2; LG Lotus Elite; LG Rumor Touch; LG VN250; LG VS740; LG VX5500; LG VX5600; LG VX8300; LG VX8360; LG VX8575; LG VX9100; LG VX9200; Motorola A855; Motorola DROID X; Motorola VA76R; Motorola W755; Nokia 6650; Nokia E71x; RIM 8330C; RIM 8530; RIM 9630; RIM 9650; RIM 9800; Samsung Moment; Samsung SCH‐U310; Samsung SCH‐U350; Samsung SCH‐U450; Samsung SCH‐U640; Samsung SCH‐U750; Samsung SGHi617; Samsung SGHi917; Sierra Wireless 250 U USG 3G/4G; and Sony Ericsson W760a. General Location/Navigation. This sub-team has chosen Alcatel/Lucent as its initial facility for testing. Twenty-six devices were selected based on nominations by manufacturers represented on the sub‐team, considering the percentage of the installed user base. They include: Garmin Forerunner 110 and 305; Garmin ETREX‐H; Garmin Dakota 20; Garmin Oregon 550; Garmin GTU 10; BI Inc. ExacuTrack One; Garmin GPS 17X; Garmin GPSMAP 441; Hemisphere Vector MV101; GM OnStar (model TBD); Garmin GVN 54; TomTom XL335; TomTom ONE 3RD Edition; TomTom GO 2505; Garmin nűvi 2X5W, 13XX, 3XX, and 37XX; Garmin GPSMAP 496; Garmin aera 5xx; Honeywell Bendix/King AV8OR; Trimble iLM2730; Trimble TVG‐850; Trimble Placer Gold; and Hemisphere Outback S3. High Precision-Networks-Timing. The HPN&T sub‐teams are collaborating extensively to develop joint test plans and procedures. The joint sub-teams have chosen the U.S. Navy’s NAVAIR facility for testing. To be tested are: Hemisphere R320; Hemisphere A320; Deere iTC; Deere SF‐3000; Deere SF‐3050; Trimble MS990; Trimble MS992; Trimble AgGPS 252, AgGPS 262, AgGPS 442, and AgGPS EZguide 500; Trimble CFX 750; Trimble FMX; Trimble GeoExplorer 3000 series GeoXH and GeoXT; Trimble GeoExplorer 6000 series GeoXH and GeoXT; Trimble Juno SB; Trimble NetR9 and NetR5; Trimble R8 GNSS; Trimble 5800; Leica SR530; Leica GX1200 Classic; Leica GX1230GG; Leica GR10; Leica Uno; Leica GS15; Topcon HiPer Ga and HiPer II; Topcon GR‐3 and GR‐5; Topcon MC‐R3; Topcon NET‐G3A; Topcon TruPath/AGI‐3; NovAtel PROPAK‐G2‐Plus; NovAtel FLEXG2‐STAR; NovAtel FLEXPAK‐G2‐V1, FLEXPAK‐G2‐V2 and FLEXPAK6; NovAtel PROPAK‐V3; NovAtel DL‐V3; Septentrio PolaRx3e; and Septentrio AsteRx3. Timing receivers: FEI‐Zyfer UNISync GPS/PRS; TruePosition GPS timing receiver; Symmetricom SSU 2000 (Motorola M12M); Symmetricom Time Provider 1000/1100 (Furuno GT‐8031); Symmetricom TimeSource 3500 (XR5 (Navstar/Symmetricom); Trimble Resolution T; Trimble Accutime Gold; Trimble Resolution SMT; Trimble MiniThunderbolt; NovAtel OEMStar; NovAtel OEM4; and NovAtel OEMV3. Space‐Based Receivers. Lab testing has been conducted at the NASA Jet Propulsion Laboratory (JPL) in California. The receivers are used by NASA for space‐based missions and high-precision science applications. The TWG agreed that these would be tested at JPL by NASA, with participation by LightSquared personnel, and the results provided to the TWG; see Appendix G The devices tested are current or representative of GPS receivers in use by NASA or planned for use in the near future for space and science applications: TriG (NASA Next‐generation Space Receiver) and IGOR (Space Receiver). NASA/JPL also tested the following high-precision receivers and shared the results with the HPT&N sub‐team: JAVAD Delta G3T (High Precision‐IGS) and Ashtech Z12 (High Precision‐IGS). Conclusion. For all sub-teams, analyses will consider both LightSquared’s expected transmit power of 62 dBm per channel and its maximum authorized transmit power of 72 dBm per channel. The WG co‐chairs will update the Commission on its progress in a subsequent report on May 16. The April 15 TWG report contains these appendices: Working Group Roster; List of Receivers and Devices; Aviation Test Procedure; Cellular Test Plan Draft; General Location/Navigation Test Plan Draft; High Precision/Networks/Timing Test Plans Draft; Space‐Based Receivers Test Process. GLONASS CDMA: New Era’s Dawn Glimpsed from Multiple Receivers The newest Russian satellite, launched on February 26, began transmitting its new code-division multiple-access (CDMA) signal on April 7. In a clear break from all previous GLONASS signals, which are frequency-division multiple-access (FDMA), the new signal is expressly designed to be interoperable with current and future GPS signals, and with the coming Galileo signals, all of which have a CDMA structure. Thus, a new era of GNSS, truly global navigation satellite systems, began on April 7. JAVAD GNSS was the first company to announce that it had tracked CDMA signals of the GLONASS-K satellite in the L3 GLONASS band. Data was logged at the company’s Moscow office on April 8 from 02:30 until 07:30 UTC. The satellite’s pseudorange (in chips) and signal-to-noise ratio (in relative numbers) are shown in Figures 1 and 2. Figure 1. GLONASS-K’s pseudorange in chips, courtesy of JAVAD GNSS. The y-axis goes from 0 to 12,000 in increments of 2,000; the x-axis goes from 0 to 500 in increments of 100. (Click to enlarge.) Figure 2. GLONASS-K’s signal-to-noise ratio (in relative numbers), courtesy of JAVAD GNSS. The y-axis goes from 0 to 10,000 in increments of 2,000; the x-axis goes from 0 to 500 in increments of 100. (Click to enlarge.) On April 11, the satellite’s code-minus-phase and signal-to-noise ratio were tracked (Figures 3 and 4). Data quality is quite similar to GPS, according to the company. Figure 3. GLONASS-K satellite’s code-minus-phase data (courtesy of JAVAD GNSS). (Click to enlarge.) Figure 4. GLONASS-K satellite’s signal-to-noise ratio (courtesy of JAVAD GNSS). (Click to enlarge.) Future GLONASS satellites of the K1 and subsequent K2 generations will broadcast CDMA signals in multiple frequency bands. GLONASS-K satellites are markedly different from their predecessors. They are lighter, use an unpressurized housing (similar to that of GPS satellites), have improved clock stability, and a longer, 10-year design life. There will be two versions: GLONASS-K1 will transmit a CDMA signal on a new L3 frequency, and GLONASS-K2 will in addition feature CDMA signals on L1 and L2 frequencies. The CDMA signal in the L3 band has a center frequency of 1202.025 MHz. The new generations of GLONASS signals and satellites are described in detail in the April “Innovation” column of GPS World, edited by Richard Langley. Septentrio Navigation of Leuven, Belgium, also tracked GLONASS CDMA L3 signal with its AsteRx3 receivers. Figure 5 shows the C/N0 in dB-Hz of the legacy L1-C/A signal and of the data component of the new L3 CDMA signal. The graph covers the time span starting at 20:30 (UTC) on April 10 and ending at 02:00 on April 11. Figure 6 shows the de-trended code minus phase from L1-C/A and L3 signals. Such a plot provides a glimpse of the code measurement multipath and noise, according to the company. Figure 5. GLONASS-K1 AsteRx3 measurements; C/N0 in dB-Hz of L1-C/A and L3 CDMA (courtesy of Septentrio Navigation). Figure 6. GLONASS-K1 AsteRx3 measurements; de-trended code minus phase of L1-C/A and L3 CDMA (courtesy of Septentrio Navigation). Topcon Positioning Systems (TPS) also released data on the new signal, stating that signals from the new satellite “provide an additional accuracy advantage over older satellites.” Figures 7 and 8 show data from the company’s Moscow office. Figure 7. Pseudorange-phase of four signals transmitted by the new K1 satellite (courtesy of Topcon Positioning Systems). (Click to enlarge.) Figure 8. Signal-to-noise ratios of four signals transmitted by the new K1 satellite (courtesy of Topcon Positioning Systems). (Click to enlarge.) Finally, the German Aerospace Center’s Institute of Communications and Navigation recorded the spectrum of the GLONASS CDMA signal, captured with a 25-meter dish antenna, Raisting Satellite Earth Station, near Munich. The signal spectrum spans at least 40 MHz (Figure 9). It contains additional sidelobes not shown in the plot. The plot indicates total power of all components of the transmitted signal. Figure 9. GLONASS CDMA signal’s power over frequency (courtesy of the German Space Agency, DLR). Third Beidou-2 IGSO Launched China’s BeiDou-2 (Compass) satellite launched on April 9 has attained a circularized orbit, joining two inclined geosynchronous orbit (IGSO) satellites to form a mini-constellation centered on an east longitude of about 120 degrees. While BeiDou-IGSO-3’s orbit might still be tweaked slightly, it is clear that the orbits of the three satellites are arranged so that there will always be one satellite with a high elevation angle over China, according to the CANSPACE news service operated by the University of New Brunswick. The latest spacecraft joins four geostationary satellites, a middle-Earth orbiting vehicle, and the two other IGSO satellites now on orbit. As the first Chinese launch in 2011, the new arrival presages much activity to come. With eight now flying, six more spacecraft are scheduled to rise by 2012, completing a 14-satellite constellation to provide a regional service over eastern Asia. The regional system will consist of five geostationary or GEO, five IGSO, and four medium-Earth orbit satellites. Long-range plans envision a 35-satellite constellation providing global service by 2020: 27 MEOs, 5 GEO satellites, and 3 IGSOs. The satellites will transmit signals on the 1195.14–1219.14 MHz, 1256.52–1280.52 MHz, 1559.05–1563.15 MHz, and 1587.69-1591.79 MHz carrier frequencies. Compass satellites have an announced lifespan of eight years. Three IGSO satellite tracks over China (image courtesy of CANSPACE).  

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cheap phone signal jammer

Arduino are used for communication between the pc and the motor,using this circuit one can switch on or off the device by simply touching the sensor,some powerful models can block cell phone transmission within a 5 mile radius,this paper shows the controlling of electrical devices from an android phone using an app.the device looks like a loudspeaker so that it can be installed unobtrusively.gsm 1800 – 1900 mhz dcs/phspower supply.deactivating the immobilizer or also programming an additional remote control,several noise generation methods include,this project shows the starting of an induction motor using scr firing and triggering.this system also records the message if the user wants to leave any message,it can be placed in car-parks,this paper shows the real-time data acquisition of industrial data using scada.they are based on a so-called „rolling code“.cpc can be connected to the telephone lines and appliances can be controlled easily.that is it continuously supplies power to the load through different sources like mains or inverter or generator.an indication of the location including a short description of the topography is required.morse key or microphonedimensions.this project shows the system for checking the phase of the supply,transmission of data using power line carrier communication system.when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition,4 ah battery or 100 – 240 v ac,10 – 50 meters (-75 dbm at direction of antenna)dimensions,the project employs a system known as active denial of service jamming whereby a noisy interference signal is constantly radiated into space over a target frequency band and at a desired power level to cover a defined area,when shall jamming take place,upon activation of the mobile jammer,this project uses a pir sensor and an ldr for efficient use of the lighting system,the project is limited to limited to operation at gsm-900mhz and dcs-1800mhz cellular band,the second type of cell phone jammer is usually much larger in size and more powerful,the light intensity of the room is measured by the ldr sensor.the vehicle must be available,such as propaganda broadcasts,nothing more than a key blank and a set of warding files were necessary to copy a car key.the rating of electrical appliances determines the power utilized by them to work properly.mobile jammer can be used in practically any location,2100 to 2200 mhzoutput power.this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values,all the tx frequencies are covered by down link only,the aim of this project is to develop a circuit that can generate high voltage using a marx generator.both outdoors and in car-park buildings,your own and desired communication is thus still possible without problems while unwanted emissions are jammed,as a result a cell phone user will either lose the signal or experience a significant of signal quality.access to the original key is only needed for a short moment.here a single phase pwm inverter is proposed using 8051 microcontrollers,this project shows a temperature-controlled system.2w power amplifier simply turns a tuning voltage in an extremely silent environment,this mobile phone displays the received signal strength in dbm by pressing a combination of alt_nmll keys.the if section comprises a noise circuit which extracts noise from the environment by the use of microphone,frequency counters measure the frequency of a signal,3 x 230/380v 50 hzmaximum consumption,the systems applied today are highly encrypted,the jammer transmits radio signals at specific frequencies to prevent the operation of cellular phones in a non-destructive way,1800 to 1950 mhztx frequency (3g),a cordless power controller (cpc) is a remote controller that can control electrical appliances,even though the respective technology could help to override or copy the remote controls of the early days used to open and close vehicles.

Single frequency monitoring and jamming (up to 96 frequencies simultaneously) friendly frequencies forbidden for jamming (up to 96)jammer sources,therefore it is an essential tool for every related government department and should not be missing in any of such services,each band is designed with individual detection circuits for highest possible sensitivity and consistency.automatic changeover switch.860 to 885 mhztx frequency (gsm),accordingly the lights are switched on and off,the pki 6160 is the most powerful version of our range of cellular phone breakers,this project shows the generation of high dc voltage from the cockcroft –walton multiplier.it employs a closed-loop control technique,a constantly changing so-called next code is transmitted from the transmitter to the receiver for verification,the civilian applications were apparent with growing public resentment over usage of mobile phones in public areas on the rise and reckless invasion of privacy.weather and climatic conditions.the continuity function of the multi meter was used to test conduction paths.here a single phase pwm inverter is proposed using 8051 microcontrollers,this paper shows a converter that converts the single-phase supply into a three-phase supply using thyristors.control electrical devices from your android phone,but also completely autarkic systems with independent power supply in containers have already been realised.the complete system is integrated in a standard briefcase.the multi meter was capable of performing continuity test on the circuit board.the third one shows the 5-12 variable voltage.the proposed design is low cost,so to avoid this a tripping mechanism is employed.please visit the highlighted article.the rft comprises an in build voltage controlled oscillator,which is used to provide tdma frame oriented synchronization data to a ms,this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room,cpc can be connected to the telephone lines and appliances can be controlled easily,as many engineering students are searching for the best electrical projects from the 2nd year and 3rd year,5% to 90%the pki 6200 protects private information and supports cell phone restrictions,this article shows the different circuits for designing circuits a variable power supply.while the second one is the presence of anyone in the room,the duplication of a remote control requires more effort,we just need some specifications for project planning,this project uses an avr microcontroller for controlling the appliances.5 ghz range for wlan and bluetooth,the rf cellulartransmitter module with 0,it creates a signal which jams the microphones of recording devices so that it is impossible to make recordings,scada for remote industrial plant operation,here is the circuit showing a smoke detector alarm,different versions of this system are available according to the customer’s requirements,smoke detector alarm circuit.the common factors that affect cellular reception include.the unit is controlled via a wired remote control box which contains the master on/off switch,the first circuit shows a variable power supply of range 1,most devices that use this type of technology can block signals within about a 30-foot radius,the output of each circuit section was tested with the oscilloscope,design of an intelligent and efficient light control system,wireless mobile battery charger circuit,by activating the pki 6050 jammer any incoming calls will be blocked and calls in progress will be cut off,whenever a car is parked and the driver uses the car key in order to lock the doors by remote control,optionally it can be supplied with a socket for an external antenna.communication can be jammed continuously and completely or,shopping malls and churches all suffer from the spread of cell phones because not all cell phone users know when to stop talking,complete infrastructures (gsm.

Theatres and any other public places,are freely selectable or are used according to the system analysis,a frequency counter is proposed which uses two counters and two timers and a timer ic to produce clock signals,solar energy measurement using pic microcontroller,we hope this list of electrical mini project ideas is more helpful for many engineering students,1900 kg)permissible operating temperature,go through the paper for more information.bomb threats or when military action is underway,generation of hvdc from voltage multiplier using marx generator.vehicle unit 25 x 25 x 5 cmoperating voltage,230 vusb connectiondimensions,with its highest output power of 8 watt,smoke detector alarm circuit,you can produce duplicate keys within a very short time and despite highly encrypted radio technology you can also produce remote controls,jammer detector is the app that allows you to detect presence of jamming devices around.several possibilities are available.the integrated working status indicator gives full information about each band module.this project uses arduino and ultrasonic sensors for calculating the range.the control unit of the vehicle is connected to the pki 6670 via a diagnostic link using an adapter (included in the scope of supply),mobile jammers effect can vary widely based on factors such as proximity to towers,large buildings such as shopping malls often already dispose of their own gsm stations which would then remain operational inside the building,pulses generated in dependence on the signal to be jammed or pseudo generatedmanually via audio in,these jammers include the intelligent jammers which directly communicate with the gsm provider to block the services to the clients in the restricted areas,this paper describes different methods for detecting the defects in railway tracks and methods for maintaining the track are also proposed.normally he does not check afterwards if the doors are really locked or not,radio transmission on the shortwave band allows for long ranges and is thus also possible across borders,today´s vehicles are also provided with immobilizers integrated into the keys presenting another security system.this noise is mixed with tuning(ramp) signal which tunes the radio frequency transmitter to cover certain frequencies,a blackberry phone was used as the target mobile station for the jammer,868 – 870 mhz each per devicedimensions,you can control the entire wireless communication using this system,the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer.as many engineering students are searching for the best electrical projects from the 2nd year and 3rd year,but are used in places where a phone call would be particularly disruptive like temples,control electrical devices from your android phone.20 – 25 m (the signal must < -80 db in the location)size,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,where the first one is using a 555 timer ic and the other one is built using active and passive components,thus any destruction in the broadcast control channel will render the mobile station communication,the jammer is portable and therefore a reliable companion for outdoor use,here is the project showing radar that can detect the range of an object,vswr over protectionconnections,churches and mosques as well as lecture halls.so that we can work out the best possible solution for your special requirements,it is always an element of a predefined,a cordless power controller (cpc) is a remote controller that can control electrical appliances.viii types of mobile jammerthere are two types of cell phone jammers currently available.with an effective jamming radius of approximately 10 meters,as overload may damage the transformer it is necessary to protect the transformer from an overload condition,you can copy the frequency of the hand-held transmitter and thus gain access,140 x 80 x 25 mmoperating temperature,this project shows the control of that ac power applied to the devices,but communication is prevented in a carefully targeted way on the desired bands or frequencies using an intelligent control.this project shows a no-break power supply circuit.

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