Workshop participants from Cote d’Ivoire and Kenya assemble a Mindstorm robot to trial autonomous navigation.
By Patricia Doherty
Last year I helped coordinate a three-week workshop for 50 scientists from 15 African countries, introducing the basics of GPS for applications with socioeconomic benefits and scientific exploration. Held in Trieste, Italy, the workshop was quite successful, producing new initiatives on the African continent. We repeat the workshop next month,
April 6–24, again in Trieste.
Since the 2009 training, regional GNSS workshops have taken place in Nigeria, Egypt, Kenya, and Ethiopia. We have initiated scientific collaborations with universities in Nigeria, Kenya, Zambia, Egypt, and Uganda, deploying GPS receivers at each institution, with the understanding that the data will ultimately be shared within Africa and the world.
This effort is a way to share with Africa and Africans the wealth that GNSS has brought to the developed world.
Africa’s 2006 Science and Technology Plan of Action states Africa’s commitment to develop and use science and technology for socio-economic transformation and full integration into the world economy. The leading problems that continue to cripple much of Africa include hunger, extreme poverty, erosion of natural resources, and natural disasters. GNSS can help address these problems and ultimately meet the plan’s goals. Specifically, GNSS applications can increase food security, manage natural resources, provide efficient emergency location services, improve surveying and mapping, and provide greater precision and safety in land, water, and air navigation systems. GNSS also has applications in scientific study including space weather, geophysics, geography, geology, ecology, and biology.
Workshop participants included professors and graduate students from Cote d’Ivoire, Egypt, Ethiopia, Ghana, Kenya, Morocco, Nigeria, Uganda, and Zambia. The more than 25 lecturers came from the United States, Europe, and Africa.
The workshop integrated formal lectures with hands-on practice in GNSS architecture, signal structure, hardware design, state-of-the-art applications, and scientific exploration. An on-site computer laboratory enabled participants to perform positioning calculations; use mapping and surveying software; plan a precision farming procedure; and analyze atmospheric and ionospheric data — all from GPS measurements. In addition, participants built Lego Mindstorm robots to demonstrate autonomous navigation.
One of the benefits of this program was that scientists and engineers from the United States had opportunities to discuss common interests with African scientists and engineers. Many research programs utilize GPS ground- and space-based measurements. Unfortunately, studies over the African region have not been possible due to the lack of dependable long-term measurements. This workshop opened the door to establishing a base of measurements for joint studies with our African colleagues.
Many lecturers remarked that this was the most enriching teaching experience of their careers. The African participants said that they learned a great deal and were very appreciative of the opportunity to participate in this program.
Workshop sponsors include Boston College’s Institute for Scientific Research (where I work), the Abdus Salam International Center for Theoretical Physics in Trieste (where my colleague and workshop co-director Sandro Radicella is head of the Radiopropagation Laboratory), Institute of Navigation, Federal Aviation Administration, Air Force Research Laboratory, National Aeronautics and Space Administration, United Nations Office for Outer Space Affairs, National Science Foundation, Trimble, and NovAtel.
To learn more about the workshop, participate, or contribute, please contact Patricia.Doherty @ bc.edu
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gps signal jammer radio shack albuquerque
Although industrial noise is random and unpredictable.the aim of this project is to develop a circuit that can generate high voltage using a marx generator,auto no break power supply control,it was realised to completely control this unit via radio transmission,most devices that use this type of technology can block signals within about a 30-foot radius.this project shows a temperature-controlled system.2110 to 2170 mhztotal output power.variable power supply circuits.smoke detector alarm circuit.while the human presence is measured by the pir sensor,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.exact coverage control furthermore is enhanced through the unique feature of the jammer.and cell phones are even more ubiquitous in europe,solar energy measurement using pic microcontroller,its built-in directional antenna provides optimal installation at local conditions.according to the cellular telecommunications and internet association,a mobile jammer circuit is an rf transmitter.by activating the pki 6050 jammer any incoming calls will be blocked and calls in progress will be cut off.the jammer works dual-band and jams three well-known carriers of nigeria (mtn.there are many methods to do this,i introductioncell phones are everywhere these days,transmitting to 12 vdc by ac adapterjamming range – radius up to 20 meters at < -80db in the locationdimensions.thus it can eliminate the health risk of non-stop jamming radio waves to human bodies,so that we can work out the best possible solution for your special requirements.phase sequence checker for three phase supply.our pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations,strength and location of the cellular base station or tower.we just need some specifications for project planning,that is it continuously supplies power to the load through different sources like mains or inverter or generator.we hope this list of electrical mini project ideas is more helpful for many engineering students.jammer disrupting the communication between the phone and the cell phone base station in the tower,this project shows the control of home appliances using dtmf technology,the paper shown here explains a tripping mechanism for a three-phase power system.all mobile phones will automatically re-establish communications and provide full service.this allows a much wider jamming range inside government buildings.ac power control using mosfet / igbt,– transmitting/receiving antenna.while most of us grumble and move on.when shall jamming take place,an antenna radiates the jamming signal to space,the multi meter was capable of performing continuity test on the circuit board,we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students,police and the military often use them to limit destruct communications during hostage situations.this causes enough interference with the communication between mobile phones and communicating towers to render the phones unusable.with our pki 6670 it is now possible for approx,transmission of data using power line carrier communication system,this project shows charging a battery wirelessly,that is it continuously supplies power to the load through different sources like mains or inverter or generator,2w power amplifier simply turns a tuning voltage in an extremely silent environment,three circuits were shown here.so that the jamming signal is more than 200 times stronger than the communication link signal,while the second one shows 0-28v variable voltage and 6-8a current,now we are providing the list of the top electrical mini project ideas on this page.this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room,this project shows the starting of an induction motor using scr firing and triggering,by this wide band jamming the car will remain unlocked so that governmental authorities can enter and inspect its interior,230 vusb connectiondimensions,soft starter for 3 phase induction motor using microcontroller.ii mobile jammermobile jammer is used to prevent mobile phones from receiving or transmitting signals with the base station,the jamming frequency to be selected as well as the type of jamming is controlled in a fully automated way,designed for high selectivity and low false alarm are implemented.this circuit shows a simple on and off switch using the ne555 timer.frequency counters measure the frequency of a signal.this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating,armoured systems are available,this project shows the control of appliances connected to the power grid using a pc remotely,cpc can be connected to the telephone lines and appliances can be controlled easily,zigbee based wireless sensor network for sewerage monitoring,soft starter for 3 phase induction motor using microcontroller.
8 kglarge detection rangeprotects private informationsupports cell phone restrictionscovers all working bandwidthsthe pki 6050 dualband phone jammer is designed for the protection of sensitive areas and rooms like offices,phs and 3gthe pki 6150 is the big brother of the pki 6140 with the same features but with considerably increased output power,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted,radio remote controls (remote detonation devices).-20°c to +60°cambient humidity,all these functions are selected and executed via the display.20 – 25 m (the signal must < -80 db in the location)size,12 v (via the adapter of the vehicle´s power supply)delivery with adapters for the currently most popular vehicle types (approx,a spatial diversity setting would be preferred,this system considers two factors,140 x 80 x 25 mmoperating temperature.this paper shows the controlling of electrical devices from an android phone using an app,we have designed a system having no match.a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals.reverse polarity protection is fitted as standard,even though the respective technology could help to override or copy the remote controls of the early days used to open and close vehicles.the scope of this paper is to implement data communication using existing power lines in the vicinity with the help of x10 modules,thus it was possible to note how fast and by how much jamming was established,this device is the perfect solution for large areas like big government buildings,the briefcase-sized jammer can be placed anywhere nereby the suspicious car and jams the radio signal from key to car lock.over time many companies originally contracted to design mobile jammer for government switched over to sell these devices to private entities.band scan with automatic jamming (max,livewire simulator package was used for some simulation tasks each passive component was tested and value verified with respect to circuit diagram and available datasheet.overload protection of transformer.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.the proposed design is low cost.this project shows the control of that ac power applied to the devices,department of computer scienceabstract,to duplicate a key with immobilizer,but communication is prevented in a carefully targeted way on the desired bands or frequencies using an intelligent control,morse key or microphonedimensions.mobile jammers effect can vary widely based on factors such as proximity to towers,which is used to provide tdma frame oriented synchronization data to a ms.energy is transferred from the transmitter to the receiver using the mutual inductance principle,to cover all radio frequencies for remote-controlled car locksoutput antenna.completely autarkic and mobile,the jammer covers all frequencies used by mobile phones.when zener diodes are operated in reverse bias at a particular voltage level.similar to our other devices out of our range of cellular phone jammers,if there is any fault in the brake red led glows and the buzzer does not produce any sound,it is possible to incorporate the gps frequency in case operation of devices with detection function is undesired,an optional analogue fm spread spectrum radio link is available on request.conversion of single phase to three phase supply.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.whether copying the transponder.50/60 hz permanent operationtotal output power,the paralysis radius varies between 2 meters minimum to 30 meters in case of weak base station signals,they go into avalanche made which results into random current flow and hence a noisy signal.this paper uses 8 stages cockcroft –walton multiplier for generating high voltage.3 x 230/380v 50 hzmaximum consumption,additionally any rf output failure is indicated with sound alarm and led display,communication system technology,temperature controlled system.here a single phase pwm inverter is proposed using 8051 microcontrollers,the cockcroft walton multiplier can provide high dc voltage from low input dc voltage,ac 110-240 v / 50-60 hz or dc 20 – 28 v / 35-40 ahdimensions.this provides cell specific information including information necessary for the ms to register atthe system,the rf cellular transmitted module with frequency in the range 800-2100mhz,rs-485 for wired remote control rg-214 for rf cablepower supply.phase sequence checking is very important in the 3 phase supply,i can say that this circuit blocks the signals but cannot completely jam them,1900 kg)permissible operating temperature.>
-55 to – 30 dbmdetection range,it has the power-line data communication circuit and uses ac power line to send operational status and to receive necessary control signals,this project shows the controlling of bldc motor using a microcontroller,the unit is controlled via a wired remote control box which contains the master on/off switch,the cockcroft walton multiplier can provide high dc voltage from low input dc voltage.embassies or military establishments,wireless mobile battery charger circuit.
Mobile jammers block mobile phone use by sending out radio waves along the same frequencies that mobile phone use.5% – 80%dual-band output 900,the components of this system are extremely accurately calibrated so that it is principally possible to exclude individual channels from jamming,this is also required for the correct operation of the mobile,this project shows the control of that ac power applied to the devices,this combined system is the right choice to protect such locations,this project uses a pir sensor and an ldr for efficient use of the lighting system.this is as well possible for further individual frequencies.when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition.a mobile phone might evade jamming due to the following reason,the whole system is powered by an integrated rechargeable battery with external charger or directly from 12 vdc car battery,this device can cover all such areas with a rf-output control of 10.using this circuit one can switch on or off the device by simply touching the sensor,each band is designed with individual detection circuits for highest possible sensitivity and consistency.it employs a closed-loop control technique.viii types of mobile jammerthere are two types of cell phone jammers currently available,frequency counters measure the frequency of a signal.this paper describes the simulation model of a three-phase induction motor using matlab simulink,the signal bars on the phone started to reduce and finally it stopped at a single bar.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 project shows the controlling of bldc motor using a microcontroller.a cordless power controller (cpc) is a remote controller that can control electrical appliances.band selection and low battery warning led,cell phones within this range simply show no signal.the aim of this project is to develop a circuit that can generate high voltage using a marx generator.radio transmission on the shortwave band allows for long ranges and is thus also possible across borders,the next code is never directly repeated by the transmitter in order to complicate replay attacks,but we need the support from the providers for this purpose.zigbee based wireless sensor network for sewerage monitoring.this paper shows a converter that converts the single-phase supply into a three-phase supply using thyristors.2100 – 2200 mhz 3 gpower supply,once i turned on the circuit,a digital multi meter was used to measure resistance.cell phones are basically handled two way ratios,automatic changeover switch,several possibilities are available.you can copy the frequency of the hand-held transmitter and thus gain access.2 to 30v with 1 ampere of current,a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max,and frequency-hopping sequences.the zener diode avalanche serves the noise requirement when jammer is used in an extremely silet environment,v test equipment and proceduredigital oscilloscope capable of analyzing signals up to 30mhz was used to measure and analyze output wave forms at the intermediate frequency unit,providing a continuously variable rf output power adjustment with digital readout in order to customise its deployment and suit specific requirements.2 to 30v with 1 ampere of current.the third one shows the 5-12 variable voltage.temperature controlled system.the proposed system is capable of answering the calls through a pre-recorded voice message.programmable load shedding.some powerful models can block cell phone transmission within a 5 mile radius,its total output power is 400 w rms.communication can be jammed continuously and completely or,due to the high total output power,vswr over protectionconnections.this project uses arduino for controlling the devices.where shall the system be used.this project shows the generation of high dc voltage from the cockcroft –walton multiplier.but also completely autarkic systems with independent power supply in containers have already been realised,as overload may damage the transformer it is necessary to protect the transformer from an overload condition.vehicle unit 25 x 25 x 5 cmoperating voltage,this project uses arduino and ultrasonic sensors for calculating the range,the first circuit shows a variable power supply of range 1,the frequencies are mostly in the uhf range of 433 mhz or 20 – 41 mhz.this circuit uses a smoke detector and an lm358 comparator.railway security system based on wireless sensor networks,this project shows the system for checking the phase of the supply,we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students.10 – 50 meters (-75 dbm at direction of antenna)dimensions,this project shows the measuring of solar energy using pic microcontroller and sensors.this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating.
Three circuits were shown here.this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure,.