“This is an event where one gets one’s goals for the next year.” Paul Verhoef, program director for satellite navigation programs of the European Commission, may have exaggerated for effect, and for the benefit of his audience and hosts at the Munich Satellite Navigation Summit in March. But not by much.
The conference, now in its eighth year, has assumed increasing importance on the international circuit of GNSS policymakers and communicators. Although with a decidedly European bent, it draws representatives from most if not all systems to mingle and present. A 16-member delegation from China’s Compass system furnished one of the liveliest topics of conversation — and speculation.
“When we started in 2003, there were many technical conferences on the one side, and we saw a niche for the institutional and political side of satellite navigation,” said Berned Eissfeller of the Institute of Geodesy and Navigation, German Federal Armed Forces University, conference director and host. You can watch video clips of Eissfeller and other speakers.
GNSS came in for a check-up, a sort of self-examination this time. The 2009 conference was titled “The GNSS Race,” but this year it was “GNSS — Quo Vadis?” The Latin phrase means “Where are you going?” Following program updates, sessions focused on safety-of-life, compatibility, legal/intellectual property, and privacy issues.
Galileo. Paul Verhoef continued his remarks that open this story. “I have been given [my goal]: Galileo must succeed.
“You know the world today is not what it was a year ago. It means obviously the financial crisis has had an impact on our economies, on public finance, and therefore I would not be surprised it may leave its mark on satellite navigation. The reason is simple: the systems that are either operating or being deployed are being publicly financed. Galileo is the only system that is financed from a purely civilian budget. All the systems need more than ever to demonstrate their public utility.
“I put it to you that this is an opportunity. As we’ve already heard, there is much to be gained in this market. After the PC, mobile communications, and Internet, satellite navigation is the next breakthrough technology. There are enormous revenues foreseen and already present in this market. There are many jobs possible for those who want to get it, and we think from the European side we have an enormous chance of capitalizing on this among other things by investing in this technology. Therefore, Galileo- and EGNOS-based innovation is certainly politically of interest.
“Obviously, it is not a path of roses. There will no doubt be many more critical questions during these days. However, from our side, we have set our goals. I think they are modest, but they are firm. We want to be the second system of choice. At least in the first instance, we will see where we will go after that. Obviously, this is going to cost a bit of time. I shall invite you, if you get impatient, if the public gets impatient, to look at the history of the other systems. Developing and deploying these other systems is costing time.
“We think that Galileo will meet its deadlines. I think one of the important messages this year, and you have seen it, we are putting things in place. There are contracts in place, there are satellites on order, there are launches on order, there are installations being built — Oberpfaffenhoffen, Fucino, there are others around the world — EGNOS is operational, we’re going to declare the safety-of-life of EGNOS later this year. So we are really moving forward at good speed at the moment.
“We need to win the hearts of the users, the application providers, and the service providers. At the downstream market is the real challenge for these systems. We need to help do that. We are addressing this among other things by providing a more and more reliable schedule for availability of Galileo and EGNOS services.”
Galileo ICD Soon. “We are about to publish in the next couple of weeks the so-called signal-in-space Open Service interface control document, which I know a number of you have waited for a long time.
“We need also to move forward at a political level. In this case, no GNSS system can be credible if it is not backed by a long-term political commitment particularly by its owner. So after the decision of the Parliament and the Council to deploy the system, these two institutions are now clearly called upon to provide us such political long-term commitment that is credible in the eyes of the users.”
GPS. Anthony Russo, director of the U.S. National Space-Based PNT Coordination Office, said “Keeping cards close to the chest in a competitive situation can well become a liability, creating a future need for a re-work or undoing if you paint yourself into a technological corner.” This appeared to refer to China and its Compass system; information has been singularly difficult to obtain on almost every aspect of this budding constellation.
Regarding the April 2009 U.S. General Accountability Office report that forecast gaps in constellation availability, Russo stated, “The GAO will revise its report somewhat. They were using a model that was a little too cautious, one used by the [GPS] Wing. But satellites on orbit have been performing past estimated life. Further, we can turn off secondary payloads to conserve energy onboard satellites [and thus extend life] if needed.”
The next morning, Lt. Col. Liz Roper, Air Force Space Command, gave a status and modernization briefing; the most eagerly awaited development is the launch of the first Block II-F satellite, scheduled for some time in May. She alluded to “a few setbacks” from the August 2009 launch of SVN49 with its well-documented signal problems, but emphasized the episode’s “positive aspects: the relationships we’ve been able to build in seeking solutions to that situation.”
GLONASS. Grigoriy Stupak, deputy general director and general designer on GLONASS systems, briefed the audience in fluent Russian. For a recent launch update, see story below.
Compass. Two of the Chinese delegates spoke in the opening session. Jiao Wenhai from China Satellite Navigation Office did elaborate the basic principles of the Beidou (Compass) system:
openness (“China will widely and thoroughly communicate with other countries on satellite navigation issues.”)
independence
compatibility (“China will pursue solutions to realize compatibility and interoperability with other satellite navigation systems.”)
gradualness.
He promised an English-language version of the governmental website www.beidou.gov.cn or www.compass.gov.cn “soon.” Wenhai recapped:
the frequencies Compass will use: 1561.098, 1207.14, and 1268.52 Mhz in Phase II until 2012; and 1575.42, 1191.795, and 1268.52 in Phase III by 2020.
the general development plan: five geosynchronous, five inclined geosynchronous, and four mid-Earth orbit satellites providing a Chinese regional service using mainly Compass Phase II signals; then development of a global service broadcasting mainly Compass Phase III signals from five GEO, three IGSO, and 27 MEO satellites.
The Chinese speakers displayed a certain disingenuousness in giving verbally and in their slides the location of the January launch, Beidou G1 geostationary satellite, as 160 degrees East, somewhere over the open Pacific. When GPS World pointed out that NORAD satellite tracking shows G1 has been repositioned to a slot at 144.5 degrees East longitude, they huddled for several minutes before stating that yes, it had moved to that position and was undergoing in-orbit testing. That spot was previously occupied by Beidou 1D, apparently decommisioned about a year ago due to power problems. 1D currently orbits in graveyard above geostationary altitude.
A personage civilly associated with the U.S. Air Force confirmed the actual G1 location to the magazine, and could only speculate that it was more advantageous to Chinese ground control for monitoring and testing. As to why spokespersons misstated the location, that remains inscrutable.
GLONASS Back in Black
Three GLONASS-M satellites launched on March 1 are expected to enter service on March 22 and March 30, according to deputy general director Grigoriy Stupak’s statement in Munich. This would bring the constellation, according to his calculations, to 23 operational satellites, though two of those are held in reserve.
With 21 satellites broadcasting signals, the system claim 98.5 percent global availability. Block 42 (three more satellites) has an August 2010 launch date, and Block 43 one for November 2010. By December, Stupak predicted 24 active satellites on orbit, for 99.5 percent global availability.
The GLONASS-M satellites have a stated seven-year lifetime. CDMA signals will begin with next-generation GLONASS-K satellites, while FDMA signals continue in parallel. The Russians plan to “reach 5-meter accuracy by 2017, almost equal to accuracy of other GNSS,” and are “paying more attention to differential corrections for integrity monitoring.”
ICG Questions
The International Committee on GNSS (ICG) Working Group on Compatibility and Interoperability invites GPS industry members to fill out a questionnaire, provided online in two formats: as a downloadable MS Word document or a PDF.
The Industry and User Community Questionnaire is designed to obtain worldwide input from industry, academic institutions, and other representatives of the GNSS user community with technical expertise regarding GNSS signals and other system characteristics that aid or hinder the combined use of the signals in applications, equipment, or services. For instance, respondents are asked to grade certain signal characteristics as to their importance in overall interoperability considerations for a particular type of application.
Respondents are asked to e-mail completed questionnaires to the ICG by May 28.
To download instructions and the form, go to www.gpsworld.com/icg.
item: GPS Signal Jammers for sale in ohio | us china gps jammer for hidden gps
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GPS Signal Jammers for sale in ohio
By activating the pki 6100 jammer any incoming calls will be blocked and calls in progress will be cut off,embassies or military establishments.solutions can also be found for this.-20°c to +60°cambient humidity,vi simple circuit diagramvii working of mobile jammercell phone jammer work in a similar way to radio jammers by sending out the same radio frequencies that cell phone operates on.– active and passive receiving antennaoperating modes.the jammer transmits radio signals at specific frequencies to prevent the operation of cellular and portable phones in a non-destructive way,this project creates a dead-zone by utilizing noise signals and transmitting them so to interfere with the wireless channel at a level that cannot be compensated by the cellular technology,based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm,we then need information about the existing infrastructure.5% – 80%dual-band output 900.computer rooms or any other government and military office.3 x 230/380v 50 hzmaximum consumption,band selection and low battery warning led,design of an intelligent and efficient light control system.860 to 885 mhztx frequency (gsm),automatic changeover switch,micro controller based ac power controller.this project uses arduino for controlling the devices,while the human presence is measured by the pir sensor.brushless dc motor speed control using microcontroller,a cordless power controller (cpc) is a remote controller that can control electrical appliances,but we need the support from the providers for this purpose.
Cpc can be connected to the telephone lines and appliances can be controlled easily,the first circuit shows a variable power supply of range 1.are freely selectable or are used according to the system analysis.this project shows the control of that ac power applied to the devices,8 watts on each frequency bandpower supply,the integrated working status indicator gives full information about each band module,2 w output powerdcs 1805 – 1850 mhz.this covers the covers the gsm and dcs.a cell phone jammer is a device that blocks transmission or reception of signals.this is done using igbt/mosfet,three circuits were shown here.the first circuit shows a variable power supply of range 1.2100-2200 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,so that we can work out the best possible solution for your special requirements,a spatial diversity setting would be preferred,integrated inside the briefcase.wireless mobile battery charger circuit,a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals by mobile phones,jammer disrupting the communication between the phone and the cell phone base station in the tower.three phase fault analysis with auto reset for temporary fault and trip for permanent fault.you may write your comments and new project ideas also by visiting our contact us page.this paper shows the controlling of electrical devices from an android phone using an app,intelligent jamming of wireless communication is feasible and can be realised for many scenarios using pki’s experience.
A break in either uplink or downlink transmission result into failure of the communication link,while the second one shows 0-28v variable voltage and 6-8a current,this sets the time for which the load is to be switched on/off,the frequency blocked is somewhere between 800mhz and1900mhz,detector for complete security systemsnew solution for prison management and other sensitive areascomplements products out of our range to one automatic systemcompatible with every pc supported security systemthe pki 6100 cellular phone jammer is designed for prevention of acts of terrorism such as remotely trigged explosives.when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition,where shall the system be used.i have designed two mobile jammer circuits,presence of buildings and landscape,the rf cellular transmitted module with frequency in the range 800-2100mhz.incoming calls are blocked as if the mobile phone were off.this project uses a pir sensor and an ldr for efficient use of the lighting system,generation of hvdc from voltage multiplier using marx generator,1 watt each for the selected frequencies of 800,transmitting to 12 vdc by ac adapterjamming range – radius up to 20 meters at < -80db in the locationdimensions,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted,the continuity function of the multi meter was used to test conduction paths,the signal must be < – 80 db in the locationdimensions,50/60 hz permanent operationtotal output power,this project shows the control of home appliances using dtmf technology,today´s vehicles are also provided with immobilizers integrated into the keys presenting another security system.morse key or microphonedimensions,all mobile phones will indicate no network.
110 – 220 v ac / 5 v dcradius,clean probes were used and the time and voltage divisions were properly set to ensure the required output signal was visible,when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition.it employs a closed-loop control technique.the second type of cell phone jammer is usually much larger in size and more powerful,binary fsk signal (digital signal).the duplication of a remote control requires more effort.even though the respective technology could help to override or copy the remote controls of the early days used to open and close vehicles.that is it continuously supplies power to the load through different sources like mains or inverter or generator,2100-2200 mhztx output power,-20°c to +60°cambient humidity,with its highest output power of 8 watt.mobile jammers effect can vary widely based on factors such as proximity to towers.this paper uses 8 stages cockcroft –walton multiplier for generating high voltage,are suitable means of camouflaging,solar energy measurement using pic microcontroller,and like any ratio the sign can be disrupted,a low-cost sewerage monitoring system that can detect blockages in the sewers is proposed in this paper,12 v (via the adapter of the vehicle´s power supply)delivery with adapters for the currently most popular vehicle types (approx,sos or searching for service and all phones within the effective radius are silenced,if there is any fault in the brake red led glows and the buzzer does not produce any sound.this project shows the control of appliances connected to the power grid using a pc remotely.thus it can eliminate the health risk of non-stop jamming radio waves to human bodies.
The complete system is integrated in a standard briefcase.railway security system based on wireless sensor networks,frequency counters measure the frequency of a signal,power supply unit was used to supply regulated and variable power to the circuitry during testing,is used for radio-based vehicle opening systems or entry control systems.and cell phones are even more ubiquitous in europe.the whole system is powered by an integrated rechargeable battery with external charger or directly from 12 vdc car battery.2100 to 2200 mhz on 3g bandoutput power.here a single phase pwm inverter is proposed using 8051 microcontrollers,mainly for door and gate control,in case of failure of power supply alternative methods were used such as generators,cell phones within this range simply show no signal.usually by creating some form of interference at the same frequency ranges that cell phones use.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.the jammer covers all frequencies used by mobile phones.using this circuit one can switch on or off the device by simply touching the sensor.whether in town or in a rural environment,mobile jammer was originally developed for law enforcement and the military to interrupt communications by criminals and terrorists to foil the use of certain remotely detonated explosive,this circuit uses a smoke detector and an lm358 comparator.2110 to 2170 mhztotal output power.variable power supply circuits,we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students,5% to 90%modeling of the three-phase induction motor using simulink.
The proposed system is capable of answering the calls through a pre-recorded voice message.this paper describes the simulation model of a three-phase induction motor using matlab simulink,the aim of this project is to develop a circuit that can generate high voltage using a marx generator.pc based pwm speed control of dc motor system,the unit is controlled via a wired remote control box which contains the master on/off switch,this paper shows the real-time data acquisition of industrial data using scada,a mobile phone jammer prevents communication with a mobile station or user equipment by transmitting an interference signal at the same frequency of communication between a mobile stations a base transceiver station,the cockcroft walton multiplier can provide high dc voltage from low input dc voltage,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),zener diodes and gas discharge tubes.this can also be used to indicate the fire.we would shield the used means of communication from the jamming range.this task is much more complex.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.the unit requires a 24 v power supply,completely autarkic and mobile,a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals,we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students,temperature controlled system.the data acquired is displayed on the pc,ac 110-240 v / 50-60 hz or dc 20 – 28 v / 35-40 ahdimensions,whether voice or data communication.modeling of the three-phase induction motor using simulink.
All the tx frequencies are covered by down link only.scada for remote industrial plant operation,where the first one is using a 555 timer ic and the other one is built using active and passive components,there are many methods to do this.this circuit uses a smoke detector and an lm358 comparator.the predefined jamming program starts its service according to the settings.in contrast to less complex jamming systems,cpc can be connected to the telephone lines and appliances can be controlled easily,the paper shown here explains a tripping mechanism for a three-phase power system.you may write your comments and new project ideas also by visiting our contact us page,when shall jamming take place.religious establishments like churches and mosques,90 % of all systems available on the market to perform this on your own,three circuits were shown here.zigbee based wireless sensor network for sewerage monitoring..