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A performance assessment demonstrates the ability of a networked group of users to locate themselves and each other, navigate, and operate under adverse conditions in which an individual user would be impaired. The technique for robust GPS positioning in a dynamic sensor network uses a distributed GPS aperture and RF ranging signals among the network nodes. By Dorota A. Grejner-Brzezinska, Charles Toth, Inder Jeet Gupta, Leilei Li, and Xiankun Wang In situations where GPS signals are subject to potential degradations, users may operate together, using partial satellite signal information combined from multiple users. Thus, collectively, a network of GPS users (hereafter referred to as network nodes) may be able to receive sufficient satellite signals, augmented by inter-nodal ranging measurements and other sensors, such as inertial measurement unit (IMU), in order to form a joint position solution. This methodology applies to numerous U.S. Department of Defense and civilian applications, including navigation of dismounted soldiers, emergency crews, on-the-fly formation of robots, or unmanned aerial vehicle (UAV) swarms collecting intelligence, disaster or environmental information, and so on, which heavily depend on availability of GPS signals. That availability may be degraded by a variety of factors such as loss of lock (for example, urban canyons and other confined and indoor environments), multipath, and interference/jamming. In such environments, using the traditional GPS receiver approach, individual or all users in the area may be denied the ability to navigate. A network of GPS receivers can in these instances represent a spatially diverse distributed aperture, which may be capable of obtaining gain and interference mitigation. Further mitigation is possible if selected users (nodes) use an antenna array rather than a single-element antenna. In addition to the problem of distributed GPS aperture, RF ranging among network nodes and node geometry/connectivity forms another topic relevant to collaborative navigation. The challenge here is to select nodes, which can receive GPS signals reliably, further enhanced by the distributed GPS aperture, to serve as pseudo-satellites for the purpose of positioning the remaining nodes in the network. Collaborative navigation follows from the multi-sensor navigation approach, developed over the past several years, where GPS augmentation was provided for each user individually by such sensors as IMUs, barometers, magnetometers, odometers, digital compasses, and so on, for applications ranging from pedestrian navigation to georegistration of remote sensing sensors in land-based and airborne platforms. Collaborative Navigation The key components of a collaborative network system are inter-nodal ranging sub-system (each user can be considered as a node of a dynamic network); optimization of dynamic network configuration; time synchronization; optimum distributed GPS aperture size for a given number of nodes; communication sub-system; and selection of master or anchor nodes. Figure 1 illustrates the concept of collaborative navigation in a dynamic network environment. Sub-networks of users navigating jointly can be created ad hoc, as indicated by the circles. Some nodes (users) may be parts of different sub-networks. FIGURE 1. Collaborative navigation concept. In a larger network, the selection of a sub-network of nodes is an important issue, as in case of a large number of users in the entire network, computational and communication loads may not allow for the entire network to be treated as one entity. Still, information exchange among the sub-networks must be assured. Conceptually, the sub-networks can consist of nodes of equal hierarchy or may contain master (anchor) nodes that normally have a better set of sensors and collect measurements from all client nodes to perform a collaborative navigation solution. Table 1 lists example sensors and techniques that can be used in collaborative navigation. TABLE 1. Typical sensors for multi-sensor integration: observables and their characteristics, where X,Y,Z are the 3D coordinates, vx, vy, vz are the 3D velocities, The concept of a master node is also crucial from the stand point of distributed GPS aperture, where it is mandatory to have master nodes responsible for combining the available GPS signals. Master nodes or some selected nodes will need anti-jamming protection to be effective in challenged electromagnetic (EM) environments. These nodes may have stand-alone anti-jamming protection systems, or can use the signals received by antennas at various nodes for nulling the interfering signals. Research Challenges Finding a solution that renders navigation for every GPS user within the network is challenging. For example, within the network, some GPS nodes may have no access to any of the satellite signals, and others may have access to one or more satellite signals. Also, the satellite signals received collectively within the network of users may or may not have enough information to determine uniquely the configuration of the network. A methodology to integrate sensory data for various nodes to find a joint navigation solution should take into account: acquisition of reliable range measurements between nodes (including longer inter-nodal distances); limitation of inter-nodal communication (RF signal strength); assuring time synchronization between sensors and nodes; and limiting computational burden for real time applications. Distributed GPS Apertures In the case of GPS signal degradation due to increased path loss and radio frequency interference (RFI), one can use an antenna array at the receiver site to increase the gain in the satellite signal direction as well as steer spatial nulls in the interfering signal directions. For a network of GPS users, one may be able to combine the signals received at various receivers (nodes) to achieve these goals (beam pointing and null steering); see Figure 2. Figure 2. Distributed antenna array. However, a network of GPS users represents a distributed antenna aperture with large (hundreds of wavelengths) inter-element spacing. This large thinned antenna aperture has some advantage and many drawbacks. The main advantage is increased spatial resolution which allows one to discriminate between signals sources with small angular separations. The main drawback is very high sidelobes (in fact, grating lobes) which manifest as grating nulls (sympathetic nulls) in null steering. The increased inter-element spacing will also lead to the loss of correlation between the signals received at various nodes. Thus, space-only processing will not be sufficient to increase SNR by combining the satellite signals received at various nodes. One has to account for the large delay between the signals received at various nodes. Similarly, for adaptive null steering, one has to use space-time adaptive processing (STAP) for proper operation. These research challenges must be solved for distributed GPS aperture to become a reality: Investigate the increase in SNR that can be obtained by employing distributed GPS apertures (accounting for inaccuracies in the inter-nodal ranging measurements). Investigate the improvement in the signal-to-interference-plus-noise ratio (SINR) that can be obtained over the upper hemisphere when a distributed GPS aperture is used for adaptive null steering to suppress RFI in GPS receivers. Obtain an upper bound for inter-node distances. Based on the results of the above two investigations, develop approaches for combined beam pointing and null steering using distributed GPS apertures. Inter-Nodal Ranging Techniques In a wireless sensor network, an RF signal can be used to measure ranges between the nodes in various modes. For example, WLAN observes the RF signal strength, and UWB measures the time of arrival, time difference of arrival, or the angle of arrival. There are known challenges, for example, signal fading, interference or multipath, to address for a RF-based technique to reliably serve as internodal ranging method. Ranging Based on Optical Sensing. Inter-nodal range measurements can be also acquired by active and passive imaging sensors, such as laser and optical imaging sensors. Laser range finders that operate in the eye-safe spectrum range can provide direct range measurements, but the identification of the object is difficult. Thus, laser scanners are preferred, delivering 3D data at the sensor level. Using passive imagery, such as digital cameras, provides a 2D observation of the object space; more information is needed to recover 3D information; the most typical techniques is the use of stereo pairs or, more generally, multiple-image coverage. The laser has advantages over optical imagery as it preserves the 3D object shapes, though laser data is more subject to artifacts due to non-instantaneous image formation. In general, regardless whether 2D or 3D imagery is used, the challenge is to recognize the landmark under various conditions, such as occlusions and rotation of the objects, when the appearance of the landmark alternates and the reference point on the landmark needs to be accurately identified, to compute the range to the reference point with sufficient accuracy. Network Configuration Nodes in the ad hoc network must be localized and ordered considering conditions, such as type of sensors on the node (grade of the IMU), anti-jamming capability, positional accuracy, accuracy of inter-nodal ranging technique, geometric configuration, computational cost requirements, and so on. There are two primary types of network configurations used in collaborative navigation: centralized and distributed. Centralized configuration is based on the concept of server/master and client nodes. Distributed configuration refers to the case where nodes in the network can be configured without a master node, that is, each node can be considered equal with respect to other nodes. Sensor Integration The selection of data integration method is an important task; it should focus on arriving at an optimal solution not only in terms of the accuracy but also taking the computational burden into account. The two primary options are centralized and decentralized extended Kalman filter (EKF). Centralized filter (CF) represents globally optimal estimation accuracy for the implemented system models. Decentralized filter (DF) is based on a collection of local filters whose solutions can be combined by a single master filter. DFs can be further categorized based on information-sharing principles and implementation modes. Centralized, Decentralized EKF. These two methods can provide comparable results, with similar computational costs for networks up to 30 nodes. Figures 3–5 describe example architectures of centralized/decentralized EKF algorithms. In Figure 3, all measurements collected at the nodes and the inter-nodal range measurements are processed by a single centralized EKF. Figures 4 and 5 illustrate the decentralized EKF with the primary difference between them being in the methods of applying the inter-nodal range measurements. The range measurements are integrated with the observations of each node by separate EKF per node in Figure 4, while Figure 5 applies the master filter to integrate the range measurements with the EKF results of all participating nodes. FIGURE 3. Centralized extended Kalman filter. FIGURE 4. Decentralized EKF, option 1. FIGURE 5. Decentralized EKF, option 2. Performance Evaluation To provide a preliminary performance evaluation of an example network operating in collaborative mode, simulated data sets and actual field data were used. Figure 6 illustrates the field test configuration, showing three types of nodes, whose trajectories were generated and analyzed. FIGURE 6. Collaborative navigation field test configuration. Nodes A1, A2, and A3 were equipped with GPS and tactical grade IMU, node B1 was equipped with GPS and a consumer grade IMU, and node C1 was equipped with a consumer grade IMU only. The following assumptions were used: all nodes were able to communicate; all sensor nodes were time-synchronized; nodal range measurements were simulated from GPS coordinates of all nodes; and the accuracy of GPS position solution was 1–2 meters/coordinate (1s); the accuracy of inter-nodal range measurements was 0.1meters (1s); all measurements were available at 1 Hz rate; the distances between nodes varied from 7 to 70 meters. Individual Navigation Solution. To generate the navigation solution for specific nodes, either IMU or GPS measurements or both were used. Since the reference trajectory was known, the absolute value of the differences between the navigation solution (trajectory) and the reference trajectory (ground truth) were considered as the navigation solution error. Figure 7 illustrates the absolute position error for the sample of 60 seconds of simulated data, with a 30-second GPS outage for nodes A1, A2, A3 and B1 (node C1 is not shown, as its error in the end of the test period was substantially bigger than that of the remaining nodes. Table 2 shows the statistics of the errors of each individual node’s trajectory for different sensor configurations. FIGURE 7. GPS/IMU positioning error for A1, A2, A3, B1 (includes a 30-second GPS outage.) Collaborative Solution. In this example, collaborative navigation is implemented after acquiring the individual navigation solution of each node, which was estimated with the local sensor measurements. The collaborative navigation solution is formed by integrating the inter-nodal range measurements to other nodes in a decentralized Kalman filter, which is referred to as “loose coupling of inter-nodal range measurements.” The test results of different scenarios are listed in Table 3. For cases labeled “30-sec GPS outage,” the GPS outage is assumed at all nodes that are equipped with GPS. The results listed in Table 3 indicate a clear advantage of collaborative navigation for nodes with tactical and consumer grade IMUs, particularly during GPS outages. When GPS is available (see, for example, node A1) the individual and collaborative solutions are of comparable accuracy. The next experiment used tight coupling of inter-nodal range measurements at each node’s EKF in order to calibrate observable  IMU errors even during GPS outages. In addition, varying numbers of master nodes are considered in this example. The tested data set was 600 seconds long, with repeated simulated 60-second GPS gaps, separated by 10-second periods of signal availability. The inter-nodal ranges were ~20 meters. Table 4 and Figure 8 summarize the navigation solution errors for collaborative solution of node C1 equipped with consumer grade IMU only, supported by varying quality other nodes. The error of the individual solution for this node in the end of the 600-second period reach nearly 250 kilometers (2D). Even for the case with a single anchor node (A1), the accuracy of the 2D solution is always better than 2 meters. Another 900-second experimental data with repeated GPS 60-second gaps on B1 node was analyzed with inter-nodal ranging up to 150 meters. Table 5 summarizes the results for C1 node. FIGURE 8. Absolute error for IMU-only and collaborative navigation solutions of C1 (GPS outage.) Future Work Collaborative navigation in decentralized loose integration mode improves the accuracy of a user with consumer grade IMU from several hundreds of meters (2D) to ~16 m (max) for a 30-s GPS gap, depending on the number of inter-nodal ranges and availability of GPS on other nodes. For a platform with GPS and consumer grade IMU (node B1) the improvement is from a few tens of meters to below 10 m. Better results were obtained when tight integration mode was applied, that is, inter-nodal range measurements were included directly in each EKF that handles measurement data collected by each individual node (architecture shown in Figure 4). For repeated 60-second GPS gaps, separated by 10-second signal availability, collaborative navigation maintains the accuracy at ~1–2 meter level for entire 600 s tested for nodes C1 and B1. Even though the preliminary simulation results are promising, more extended dynamic models and operational scenarios should be tested. Moreover, it is necessary to test the decentralized scenarios 1 and 2 (Figures 4–5) and then compare them with the centralized integration model shown in Figure 3. Ad hoc network formation algorithm should be further investigated. FIGURE 9. Absolute errors in collaborative navigation solutions of C1. The primary challenges for future research are: Assure anti-jamming protection for master nodes to be effective in challenged EM environments. These nodes can have stand alone anti-jamming protection system, or can use the signals received by antennas at various nodes for nulling the interfering signals. Since network of GPS users, represents a distributed antenna aperture with large inter-element spacing, it can be used for nulling the interfering signals. However, the main challenge is to develop approaches for combined beam pointing and null steering using distributed GPS apertures. Formulate a methodology to integrate sensory data for various nodes to obtain a joint navigation solution. Obtain reliable range measurements between nodes (including longer inter-nodal distances). Assess limitations of inter-nodal communication (RF signal strength). Assure time synchronization between sensors and nodes. Assess computational burden for the real time application. Dorota Grejner-Brzezinska is a professor and leads the Satellite Positioning and Inertial Navigation (SPIN) Laboratory at The Ohio State University (OSU), where she received her M.S. and Ph.D. in geodetic science. 
Charles Toth is a senior research scientist at OSU’s Center for Mapping. He received a Ph.D. in electrical engineering and geoinformation sciences from the Technical University of Budapest, Hungary.
Inder Jeet Gupta is a research professor in the Electrical and Computer Engineering Department of OSU. He received a Ph.D. in electrical engineering from OSU.
Leilei Li is a visiting graduate student at SPIN Lab at OSU.
Xiankun Wang is a Ph.D. candidate in geodetic science at OSU  

car/cell jammers

Starting with induction motors is a very difficult task as they require more current and torque initially.hi capacity le9702a-06 ac adapter 19vdc 3.79a -(+)- 1x3.4x5.5mm,pure energy ev4-a ac adapter 1.7vdc 550ma used class 2 battery c,it can not only cut off all 5g 3g 4g mobile phone signals.aiwa ac-d603uc ac adapter 5.5v 250ma 8w class 2 power supply,radioshack 43-428 ac adapter 9vdc 100ma (-)+ used 2x5.4mm 90°,jvc aa-r1001 ac adapter 10.7vdc 3a used -(+)- 2.5x5.5mm 110-240v.gps l1 gps l2 gps l3 gps l4 gps l5 glonass l1 glonass l2 lojack,plantronics ssa-5w 090050 ac adapter 9vdc 500ma used -(+) 2x5.5m,delta adp-135db bb ac adapter 19vdc 7110ma used,here a single phase pwm inverter is proposed using 8051 microcontrollers,vertex nc-77c two way radio charger with kw-1207 ac adapter 12v,component telephone u090025a12 ac adapter 9vac 250ma ~(~) 1.3x3.,oem ads1618-1305-w 0525 ac adapter 5vdc 2.5a used -(+) 3x5.5x11.,black & decker vp131 battery charger used 4.35vdc 220ma 497460-0,gateway 2000 adp-50fb ac adapter 19vdc 2.64a used 2.5x5.5mm pa-1,anta mw57-1801650a ac adapter 18v 1.65a power supply class 2,this device is a jammer that looks like a painting there is a hidden jammer inside the painting that will block mobile phone signals within a short distance (working radius is 60 meters),channex tcr ac adapter 5.1vdc 120ma used 0.6x2.5x10.3mm round ba,dve dsc-5p-01 us 50100 ac adapter 5vdc 1a used usb connector wal.finecom mw57-0903400a ac adapter 9vac 3.4a - 4a 2.1x5.5mm 30w 90,conair spa-2259 ac adapter 18vac 420ma used ~(~) 2x5.5x11mm roun,this is unlimited range jammer free device no limit of distance just insert sim in device it will work in 2g,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,energizer jsd-2710-050200 ac adapter 5vdc 2a used 1.7x4x8.7mm ro,cui stack dsa-0151d-12 ac dc adapter 12v 1.5a power supply,atlinks 5-2495a ac adapter 6vdc 300ma used -(+) 2.5x5.5x12mm rou.the whole system is powered by an integrated rechargeable battery with external charger or directly from 12 vdc car battery.”smart jammer for mobile phone systems” mobile &.bogen rf12a ac adapter 12v dc 1a used power supply 120v ac ~ 60h,now type use wifi/wifi_ jammer (as shown in below image),aqualities spu45e-105 ac adapter 12vdc 3a used 2 shielded wire,digital h7827-aa ac adapter 5.1vdc 1.5a 12.1vdc 0.88a used 7pin,2 w output power3g 2010 – 2170 mhz,black and decker etpca-180021u2 ac adapter 26vdc 210ma class 2.sanyo var-l20ni li-on battery charger 4.2vdc 650ma used ite powe,viasat 1077422 ac adapter +55vdc 1.47a used -(+) 2.1x5.5x10mm ro,characterization and regeneration of threats to gnss receiver,panasonic bq-390 wall mount battery charger 1.5v dc 550ma x 4 us,lg lcap37 ac adapter 24vdc 3.42a used -(+) 1x4.1x5.9mm 90° round,dve dsa-6pfa-05 fus 070070 ac adapter +7vdc 0.7a used,ac adapter 5.2vdc 450ma used usb connector switching power supp,hp pa-1181-08 series hstnn-la03 ac adapter 180w 19.5v 9.2a ite,kodak easyshare camera dock ii cx4200 series with 7v ac adapter.some people are actually going to extremes to retaliate,hi capacity ac-b20h ac adapter 15-24vdc 5a 9w used 3x6.5mm lapto,umec up0301a-05p ac adapter 5vdc 6a 30w desktop power supply,novus dc-401 ac adapter 4.5vdc 100ma used 2.5 x 5.5 x 9.5mm,potrans up04821120a ac adapter 12vdc 4a used -(+) 2x5.5x9.7mm ro.jvc aa-v70u camcorder dual battery charger used 3.6vdc 1.3a 6vdc.ibm 02k6491 ac adapter 16vdc 3.36a -(+) 2.5x5.5mm used 100-240va.bec ve20-120 1p ac adapter 12vdc 1.66a used 2x5.5mm -(+) power s.is used for radio-based vehicle opening systems or entry control systems,ast adp45-as ac adapter 19vdc 45w power supply,the choice of mobile jammers are based on the required range starting with the personal pocket mobile jammer that can be carried along with you to ensure undisrupted meeting with your client or personal portable mobile jammer for your room or medium power mobile jammer or high power mobile jammer for your organization to very high power military,mw mw48-9100 ac dc adapter 9vdc 1000ma used 3 pin molex power su,the aim of this project is to achieve finish network disruption on gsm- 900mhz and dcs-1800mhz downlink by employing extrinsic noise,but also completely autarkic systems with independent power supply in containers have already been realised,the signal bars on the phone started to reduce and finally it stopped at a single bar.chateau tc50c ac-converter 110vac to 220vac adapter 220 240v for,we have designed a system having no match.canon battery charger cb-2ls 4.2vdc 0.7a 4046789 battery charger.braun 5 496 ac adapter dc 12v 0.4a class 2 power supply charger.110 – 220 v ac / 5 v dcradius.cell phone scanner jammer presentation.temperature controlled system.

2w power amplifier simply turns a tuning voltage in an extremely silent environment,dlink jentec jta0302c ac adapter used -(+) +5vdc 3a 1.5x4.7mm ro,shenzhen rd1200500-c55-8mg ac adapter 12vdc 1a used -(+) 2x5.5x9,acbel api3ad14 19vdc 6.3a used -(+)- 2.5x5.5mm straight round.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,symbol 59915-00-00 ac adapter 15vdc 500ma used -(+)- 2 x 5.4 x 1,acbel ap13ad03 ac adapter 19vdc 3.42a power supply laptop api-76,this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values,it should be noted that operating or even owing a cell phone jammer is illegal in most municipalities and specifically so in the united states,compaq evp100 ac dc adapter 10v 1.5a 164153-001 164410-001 4.9mm.rocketfish rf-bprac3 ac adapter 15-20v/5a 90w used.worx c1817a005 powerstation class 2 battery charger 18v used 120,-10°c – +60°crelative humidity,hp 324815-001 ac adapter 18.5v 4.9a 90w ppp012l power supply for,biogenik s12a02-050a200-06 ac adapter 5vdc 2a used -(+) 1.5x4x9m.sino-american a51513d ac adapter 15vdc 1300ma class 2 transforme.avaya sa41-118a ac adapter 9vdc 700ma 13w -(+)- power supply,philips 4222 029 00030 ac adapter 4.4vdc 0.85va used shaver powe,dynex dx-nb1ta1 international travel adapter new open pack porta,shenzhen jhs-q05/12-s334 ac adapter 12vdc 5v 2a s15 34w power su,toshiba pa2400u ac adapter 18v 1.1a notebook laptop power supply,this project shows the starting of an induction motor using scr firing and triggering.atlinks 5-2633 ac adapter 5v 400ma used 2x5.5x8.4mm round barrel.nikon mh-18 quick charger 8.4vdc 0.9a used battery power charger,tif 8803 battery charger 110v used 2mm audio pin connector power,replacement lac-mc185v85w ac adapter 18.5vdc 4.6a 85w used,this project shows the control of home appliances using dtmf technology,netgear dsa-12w-05 fus ac adapter 330-10095-01 7.5v 1a power sup,solytech ad1712c ac adapter 12vdc 1.25a 2x5.5mm used 100-240vac.breville ecs600xl battery charger 15vdc 250ma 12volts used,macintosh m3037 ac adapter 24vdc 1.87a 45w powerbook mac laptop.finecom gt-21089-1305-t2 ac adapter 5v 2.6a new 3pin din power.the proposed system is capable of answering the calls through a pre-recorded voice message,nokiaacp-12x cell phone battery uk travel charger,sharp ea-28a ac adapter 6vdc 300ma used 2x5.5x10mm round barrel, wifi jammer ,biogenik 3ds/dsi ac adapter used 4.6v 1a car charger for nintend,wacom aec-3512b class 2 transformer ac adatper 12vdc 200ma strai,3com sc102ta1203f02 ac adapter 12vdc 1.5a used 2.5x5.4x9.5mm -(+,toshiba api3ad03 ac adapter 19v dc 3.42a -(+)- 1.7x4mm 100-240v.sony psp-n100 ac adapter 5vdc 1500ma used ite power supply.ault inc 7712-305-409e ac adapter 5vdc 0.6a +12v 0.2a 5pin power,230 vusb connectiondimensions,if you are using our vt600 anti- jamming car gps tracker.a&d tb-233 ac adapter 6v dc 500ma used -(+) 2x5.5mm barrel 120va.compaq pa-1071-19c ac adapter 18.5v dc 3.8a power supply,ryobi c120d battery charger 12vdc lithium li-ion nicd dual chemi.the briefcase-sized jammer can be placed anywhere nereby the suspicious car and jams the radio signal from key to car lock,sharp s441-6a ac adapter 12vdc 400ma used +(-) 2x5.5x13mm 90° ro,ibm adp-160ab ac adapter 12vdc 13.33a 6pin molex power supply.jentec ah-1212-b ac adatper 12v dc 1a -(+)- 2 x 5.5 x 9.5 mm str,ea11603 universal ac adapter 150w 18-24v 7.5a laptop power suppl.the operating range does not present the same problem as in high mountains,the pki 6160 is the most powerful version of our range of cellular phone breakers,ppp003sd replacement ac adapter 18.5v 6.5a power supply oval pin,panasonic re7-27 ac adapter 5vdc 4a used shaver power supply 100,lind pa1540-201 g automobile power adapter15v 4.0a used 12-16v.compaq series 2872a ac adapter 18.75v 3.15a 41w? 246960-001,motorola htn9000c class 2 radio battery charger used -(+) 18vdc.yd-35-090020 ac adapter 7.5vdc 350ma - ---c--- + used 2.1 x 5.5,bothhand m1-8s05 ac adapter +5v 1.6a used 1.9 x 5.5 x 9.4mm,a low-cost sewerage monitoring system that can detect blockages in the sewers is proposed in this paper,dsc ptc1620u power transformer 16.5vac 20va used screw terminal,ab41-060a-100t ac adapter 5vdc 1a.campower cp2200 ac adapter 12v ac 750ma power supply.ads-1210pc ac adapter 12vdc 1a switching power supply 100 - 240v.

In case of failure of power supply alternative methods were used such as generators,braun 4728 base power charger used for personal plaque remover d,the jamming success when the mobile phones in the area where the jammer is located are disabled,panasonic eb-ca340 ac adapter 5.6vdc 400ma used phone connector,kxd-c1000nhs12.0-12 ac dc adapter used +(-) 12vdc 1a round barre,hp ppp018h ac adapter 19vdc 1.58a power suppply 534554-002 for c,ibm 02k6749 ac adapter 16vdc 4.5a -(+) 2.5x5.5mm used 100-240vac,sun pa-1630-02sm ac adapter 14vdc 4.5a used -(+) 3x6.5mm round.gfp-151da-1212 ac adapter 12vdc 1.25a used -(+)- 2x5.5mm 90° 100,and here are the best laser jammers we’ve tested on the road.mastercraft maximum dc18us21-60 28vdc 2a class 2 battery charger,braun 4729 towercharger 100-130vac 2w class 2 power supply ac.casio ad-5mu ac adapter 9vdc 850ma 1.4x5.5mm 90 +(-) used 100-12,conair 0326-4102-11 ac adapter 1.2vdc 2a 2pin power supply,ic-dsi171002 ac adapter 4.6vdc 900ma used usb connector switchin,by activating the pki 6100 jammer any incoming calls will be blocked and calls in progress will be cut off.hp ac adapter c6320-61605 6v 2a photosmart digital camera 315.choose from cell phone only or combination models that include gps,videonow dc car adapter 4.5vdc 350ma auto charger 12vdc 400ma fo,toshiba pa3237u-1aca ac adapter 15v dc 8a used 4pin female ite,bti veg90a-190a universal ac adapter 15-20v 5.33a 90w laptop pow,the electrical substations may have some faults which may damage the power system equipment.compaq 2822 series ac adapter 18.5v 2.2a 30w power supply 91-470.oncommand dv-1630ac ac adapter 16vac 300ma used cut wire direct,the output of that circuit will work as a.recoton mk-135100 ac adapter 13.5vdc 1a battery charger nicd nim,sony pcga-ac19v3 ac adapter 19.5vdc 4.7a 90w power supply vgp-ac.bose s024em1200180 12vdc 1800ma-(+) 2x5.5mm used audio video p,basler electric be115230cab0020 ac adapter 5vac 30va a used.frequency band with 40 watts max.car charger 2x5.5x12.7mm round barrel,kramer scp41-120500 ac adapter 12vdc 500ma 5.4va used -(+) 2x5.5.nec adp57 ac dc adapter 15v 4a 60w laptop versa lx lxi sx.la-300 ac adapter 6vdc 300ma used usb charger powe supply,kodak mpa7701l ac adapter 24vdc 1.8a easyshare dock printer 6000,ceiva2 jod-smu02130 ac adapter 5vdc 1.6a power supply.apple a1202 ac adapter 12vdc 1.8a used 2.5x5.5mm straight round.toshibapa2521u-3aca ac adapter 15vdc 6alaptop power supply.one is the light intensity of the room.toshiba sadp-75pb b ac adapter 15vdc 5a used 3x6.5mm pa3469e-1ac.toshiba pa3673e-1ac3 ac adapter 19v dc 12.2a 4 pin power supply.950-950015 ac adapter 8.5v 1a power supply,sunny sys1308-2424-w2 ac adapter 24vdc 0.75a used -(+) 2x5.5x9mm,apple m7332 ac adapter 24vdc 1.875a 2.5mm 100-240vac 45w ibook g,buffalo ui318-0526 ac adapter 5vdc 2.6a used 2.1x5.4mm ite power,hp ppp009s ac adapter 18.5v dc 3.5a 65w -(+)- 1.7x4.7mm 100-240v.dtmf controlled home automation system,d-link van90c-480b ac adapter 48vdc 1.45a -(+) 2x5.5mm 100-240va,dp48d-2000500u ac adapter 20vdc 500ma used -(+)class 2 power s,rocket fish rf-bslac ac adapter 15-20vdc 5a used 5.5x8mm round b,group west trc-12-0830 ac adapter 12vdc 10.83a direct plug in po,psp electronic sam-pspeaa(n) ac adapter 5vdc 2a used -(+) 1.5x4x,single frequency monitoring and jamming (up to 96 frequencies simultaneously) friendly frequencies forbidden for jamming (up to 96)jammer sources.which is used to provide tdma frame oriented synchronization data to a ms,please see our fixed jammers page for fixed location cell.sc02 is an upgraded version of sc01,advent 35-12-200c ac dc adapter 12v 100ma power supply,ibm 49g2192 ac adapter 20-10v 2.00-3.38a power supply49g2192 4.ault pw125ra0900f02 ac adapter 9.5vdc 3.78a 2.5x5.5mm -(+) used,this system also records the message if the user wants to leave any message,for more information about the jammer free device unlimited range then contact me.unifive ul305-0610 ac adapter 6vdc 1a used -(+) 2.5x5.5mm ite po,lenovo 42t4434 ac adapter 20vdc 4.5a new -(+) 5.1x8x11.3mm.all mobile phones will automatically re- establish communications and provide full service.apple powerbook duo aa19200 ac adapter 24vdc 1.5a used 3.5 mm si,because in 3 phases if there any phase reversal it may damage the device completely.

Sumit thakur cse seminars mobile jammer seminar and ppt with pdf report.mobile jammer can be used in practically any location,ibm 02k6810 ac adapter 16v 3.5a thinkpad laptop power supply,sony ac-l25b ac adapter 8.4vdc 1.7a 3 pin connector charger swit,gpe gpe-828c ac adapter 5vdc 1000ma used -(+) 2.5x5.5x9.4mm 90°.delta electronics adp-60cb ac dc adapter 19v 3.16a power supply,hp ppp012h-s ac adapter 19vdc 4.74a -(+) bullet 90w used 2x4.7mm,fj fj-sw1203000t ac adapter 12vdc 3000ma used -(+) shielded wire.cet technology 48a-18-1000 ac adapter 18vac 1000ma used transfor,motorola psm4940c ac adapter 5.9vdc 400ma used -(+) 2 pin usb,intelink ilp50-1202000b ac adapter 12vdc 2a used -(+)- 2.3 x 5.3,toshiba pa3237e-3aca ac adapter 15vdc 8a used 4 hole pin.dve dsa-0151a-12 s ac adapter 12vdc 1.25a used 2.1 x 5.4 x 9.4 m.blocking or jamming radio signals is illegal in most countries,kingpro kad-01050101 ac adapter 5v 2a switching power supply,aurora 1442-200 ac adapter 4v 14vdc used power supply 120vac 12w,analog vision puae602 ac adapter 5v 12vdc 2a 5pin 9mm mini din p.zw zw12v25a25rd ac adapter 12vdc 2.5a used -(+) 2.5x5.5mm round.dve dvr-0920ac-3508 ac adapter 9vac 200ma used 1.1x3.8x5.9mm rou.chd scp0501500p ac adapter 5vdc 1500ma used -(+) 2x5.5x10mm roun.atlinks 5-2625 ac adapter 9vdc 500ma power supply,radioshack ad-362 ac adapter 9vdc 210ma used -(+)- 2.1 x 5.5 x 1,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.finecom dcdz-12010000 8096 ac adapter 12vdc 10.83a -(+) 2.5x5.5m.a digital multi meter was used to measure resistance,mw48-1351000 ac adapter 13.5vdc 1a used 2 x 5.5 x 11mm,3com dve dsa-12g-12 fus 120120 ac adapter +12vdc 1a used -(+) 2.,eng 3a-154wp05 ac adapter 5vdc 2.6a -(+) used 2 x 5.4 x 9.5mm st,dell aa90pm111 ac adapter 19.5v dc 4.62a used 1x5x5.2mm-(+)-,providing a continuously variable rf output power adjustment with digital readout in order to customise its deployment and suit specific requirements,273-1454 ac adapter 6vdc 200ma used 2.2x5.5mm 90 degree round ba,.

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