Yang Changfeng, Chief Architect, BeiDou Navigation Satellite System. (Photo: BeiDou) By Yang Changfeng Chief Architect, BeiDou Navigation Satellite System As one of the core Global Navigation Satellite Systems (GNSS) providers, the BeiDou Navigation Satellite System (“BDS”) has been developed steadily following a three-step strategy. BDS has been providing global services since the end of 2018. By around 2020, the BDS-3 system will be entirely completed to provide global users with free, open and high-quality navigation, positioning, timing, short message communication and other services. A more ubiquitous, integrated and intelligent positioning, navigation, timing system will be built before 2035. In 2019, BDS has progressed with regard to aspects of system construction, integrated applications and international development. System Construction Accelerating Satellite Deployment. From January to November 2019, three BDS-3 satellites in inclined geosynchronous satellite orbit (IGSO) and four satellites in medium Earth orbit (MEO) were launched, and one IGSO satellite has completed in-orbit tests, to further improve the global system constellation. The last two MEO satellites are planned to be launched by the end of 2019, marking the completion of the BDS core global constellation deployment. By June 2020, another two GEO satellites will be launched, and the full deployment of the BDS-3 system will be completed. Ground System Construction. In 2019, 12 new ground operation and control stations (including one uplink station and 11 class-II monitoring stations) have been built, to complete the satellite-ground joint debug and integration tests, and the overall operation of the system is stable. By the end of October 2019, 34 BDS satellites are operating in orbit to provide services to global users, including 15 BDS-2 satellites and 19 BDS-3 satellites. Improving Service Performance Key Service Areas. In May 2019, the last BDS-2 backup satellite was launched to further improve the performance in the key service areas of the BDS-2 system. As the BDS-3 satellites go into operation, the accuracy and availability of the BDS B1I and B3I signals, in the BDS-2service area, has been improved by about 30% and 5% respectively, compared with that of solely relying on the BDS-2 system. Global Service Areas. The BDS B1I and B3I service areas have been expanded from the Asia Pacific region to the world, and the accuracy and availability have been further improved. With the condition of PDOP ≤6, the availability is better than 99% in most regions all over the world (in parts of the United States, better than 97%). In the global area, the mean value of the actual measured positioning accuracy is about 3.6m horizontally and 6.6m vertically, velocity measurement accuracy is about 0.05m/s, and timing accuracy is about 9.8 nanoseconds (95% confidence). So far, the BDS-3 new signals, B1C and B2a, have possessed service capacity worldwide. The system availability is better than 87%, in the condition of PDOP ≤ 6. The mean value of the actual measured positioning accuracy is about 2.4m horizontally and 4.3m vertically, velocity measurement accuracy is about 0.06m/s and timing accuracy is about 19.9 nanoseconds (95% confidence). BDS Availability (PDOP≤6). (Image: BeiDou) Measured BDS B1C Positioning Accuracy. (Image: BeiDou) Building of the Featured Capacity. The BDS/GNSS ground based augmentation system has been providing basic services. It consists of 155 framework reference stations and nearly 2,200 regional stations in China. The system has carried out high-precision applications in many fields, such as surveying and mapping, land resources, earthquake, transportation and meteorology. Its basic services include real-time positioning at the meter, decimeter and centimeter level, as well as precise post-processing positioning at the millimeter level. The BeiDou Satellite-Based Augmentation System (BDSBAS) is being developed in accordance with International Civil Aviation Organization (ICAO) standards to provide navigation services with superior accuracy and integrity. In 2019, the first GEO satellite with the BDSBAS payload has been tested in orbit and the satellite is in good condition. Integrated Applications As the system construction accelerates, BDS is also making great efforts to strengthen the development of the fundamental products and applications in various fields. The integrated applications adopt the “BDS+” model to stimulate the growth of satellite navigation industry. Fundamental Products. At present, the fundamental BDS products have been used in such areas as mass market applications, of which the performance has reached or is close-to the world-class level. The development of full-frequency integrated high-precision chips is near its completion, and the performance of the BDS chips will improve further. By the end of 2019, BDS navigation chips, modules and antennas have been exported to more than 100 countries and regions. In 2018, the domestic output value was more than RMB 300 billion (US$43 billion), in which the BDS contribution exceeds 80%. Industrial Applications. BDS has been widely used in various fields — communication and transportation, public security, agriculture, forestry, animal husbandry and fishery, hydrological monitoring, meteorological forecast, time synchronization, power dispatching, disaster prevention and mitigation — generating significant economic and social benefits. In the field of transportation, by September 2019, more than 6.47 million road operating vehicles and 42,300 postal and express delivery vehicles in China are using BDS, and the world’s largest dynamic supervision system of operating vehicles has been formed, which effectively improved management efficiency and road transportation safety. In agriculture, a BDS-based automatic driving system has been equipped on more than 20,000 sets of agricultural machinery and equipment, saving 50% of the labor cost. The BDS-based agricultural machinery operation supervision platform and the IoT platform has been serving 10 million units of agricultural machinery equipment, greatly improving management and operational efficiency. In disaster prevention and mitigation, a tri-level platform covering the national ministry, the provinces, and cities and counties has been built to offer six-tier application services, with more than 45,000 terminals using BDS. The BDS/GNSS high-precision technologies have been applied in the field of geological disaster monitoring, while the landslides in Gansu province have been successfully forecast repeatedly, with time accuracy at the second level and deformation accuracy at the millimeter level. Mass Market Applications. The BDS-based navigation and positioning services have been adopted by various enterprises in the fields of e-commerce, smart mobile terminal manufacture, location-based services (LBS), the sharing economy and the mass market, thereby changing people’s production and life style profoundly. Mainstream manufacturers in China and around the world have introduced BDS-compatible chips that integrate communication and navigation functions. According to Chinese market statistics, in the third quarter of 2019, 151 types of mobile phones applying for license have positioning functions, among which 110 models support BDS. Using BDS/GNSS ground based augmentation stations, the spatial-temporal services including centimeter-level positioning, millimeter-level perception and nanometer-level timing services can be provided, while the accelerated positioning services cover 220 countries and regions with more than 390 million global users. International Development Bilateral Cooperation. BDS continues to carry out bilateral cooperation with other navigation satellite systems, to promote compatibility and joint applications. China and the United States have set up joint working groups in areas such as compatibility and interoperability, augmentation systems and civil services to continuously develop cooperation and exchanges. China and the EU set up a technical working group on the compatibility and interoperability between the BDS and Galileo systems to carry out coordination, exchanges and cooperation, under the framework of the China-EU space cooperation dialogue and the International Telecommunications Union (ITU). The agreement between the Government of the People’s Republic of China and the Government of the Russian Federation on Cooperation in the Field of the Use of BeiDou and GLONASS for Peaceful Purposes has come into effect. In August 2019, China and the Russian Federation held their sixth bilateral meeting in Kazan, Russia, signed the site survey certificate of GNSS monitoring stations, and achieved many cooperation results. In addition, the bilateral cooperation with Iraq, Tunisia and Saudi Arabia has also been steadily promoted. Multilateral Cooperation. During the 62nd session of the Committee on the Peaceful Uses of Outer Space (COPUOS) in June 2019, an exhibition on ancient Chinese navigation technologies was held at the Vienna International Center with the theme “From Compass to BeiDou,” which vividly demonstrated China’s brilliant achievements in timing, mapping, cartography and navigation science and technology. In April and October, 2019, the second China-Arab States BDS Cooperation Forum and China-Central Asia BDS cooperation forum were held in Tunis and Nanning, China, respectively, to promote the BDS to serve the Arab region and Central Asian countries. The BDS Overseas Applications Were Steadily Promoted. With BDS high-precision products being exported, BDS has been widely used in different regions and fields, such as land registration, precision agriculture, warehouse logistics in ASEAN countries, construction in Western Asia, airport timing and piling at seas in South Asia, electric power inspection in Eastern Europe, and land survey in African countries. As BDS-3 system continues to improve construction, it will provide quality services for more people in a wider area. Ratification of BDS by International Standards. BDS has made a clear schedule to be ratified by the ICAO standards in 2020. It has formulated 26 standards in the field of international mobile communication based on the BDS B1I signal, and other standards based on the B1C and B2a signals are being developed. A receiver positioning result output protocol (NMEA0183) and a receiver data exchange format (RINEX 3.04) supporting BDS are to be released. Technical parameters and index information of BDS search and rescue (SAR) payloads are included in relevant COSPAS-SARSAT documents, and the development and in-orbit test of the first batch of SAR payload has been completed. The first BDS standard in the International Electrotechnical Commission (IEC) has been developed and approved and is expected to be released in June 2020. Future Plans After BDS achieves global service capabilities by 2020, it will further improve global navigation, positioning, timing and regional short-message communication services, and finalize global short-message communication, international search and rescue, satellite-based augmentation, precise point positioning, and other service capabilities. China’s BDS will contribute Chinese solutions to the world, and give full play of its role, with a renewed attitude, stronger capabilities and better services, to serve the world and benefit humankind.
gps jammer SherbrookeLishin lse0202c1990 ac adapter 19v 4.74a laptop power supply.65w-ac1002 ac adapter 19vdc 3.42a used -(+) 2.5x5.5x11.8mm 90° r.ever-glow s15ad18008001 ac adapter 18vdc 800ma -(+) 2.4x5.4mm st.this paper describes the simulation model of a three-phase induction motor using matlab simulink,ktec ka12d240020034u ac adapter 24vdc 200ma used -(+) 2x5.5x14mm,philips 4203 030 77990 ac adapter 1.6v dc 80ma charger.bothhand sa06-20s48-v ac adapter +48vdc 0.4a power supply.liteon pa-1600-2-rohs ac adapter 12vdc 5a used -(+) 2.5x5.5x9.7m,motorola psm5049a ac adapter dc 4.4v 1.5a cellphone charger.aopen a10p1-05mp ac adapter 22v 745ma i.t.e power supply for gps.140 x 80 x 25 mmoperating temperature,hp pa-1181-08 series hstnn-la03 ac adapter 180w 19.5v 9.2a ite,delta eadp-36kb a ac adapter 12vdc 3a used -(+) 2.5x5.5mm round.motomaster 11-1552-4 manual battery charger 6/12v dc 1a,targus pa350 (ver 2.0) f1201 ac adapter 3-24vdc used universal a,the jammer covers all frequencies used by mobile phones.cambridge soundworks tead-66-132500u ac adapter 13.5vdc 2.5a,weather and climatic conditions.dechang long-0910b ac dc adapter 9v dc 1a 2 x 5.5 x 10.2mm used,digipower ip-pcmini car adapter charger for iphone and ipod,placed in front of the jammer for better exposure to noise,flextronics a 1300 charger 5vdc 1a used -(+) 100-240v~50/60hz 0.,in this tutroial im going to say about how to jam a wirless network using websploit in kali linux,ibm 92p1105 ac adapter 19vdc 4.74a 5.5x7.9mm -(+) used 100-240va,archer 273-1454a ac dc adapter 6v 150ma power supply,atlinks usa 5-2629 ac adapter 9vdc 300ma power supply class 2 tr,delta 57-30-500d ac adapter 30vdc 500ma class 2 power supply,high efficiency matching units and omnidirectional antenna for each of the three bandstotal output power 400 w rmscooling,braun 5 497 ac adapter dc 12v 0.4a class 2 power supply charger,radioshack 273-1695 ac adapter 3,5,6,6.5vdc 2.5a digital camera,this circuit is very efficient to …,samsung tad136jbe ac adapter 5vdc 0.7a used 0.8x2.5mm 90°.you can copy the frequency of the hand-held transmitter and thus gain access,lenovo 92p1160 ac adapter 20vdc 3.25a new power supply 65w.edac ea10523c-120 ac adapter 12vdc 5a used 2.5 x 5.5 x 11mm,symbol r410506 ac adapter 4vdc 140ma used 24pin connector ptc-70.disrupting a cell phone is the same as jamming any type of radio communication,toshiba tec 75101u-b ac dc adapter +24v 3.125a 75w power supply.compaq 2932a ac adapter 5vdc 1500ma used 1 x 4 x 9.5mm,because in 3 phases if there any phase reversal it may damage the device completely.this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room,ac adapter 12vdc output 3pin power supply used working for lapto.oral-b 3733 blue charger personal hygiene appliance toothbrush d,dell ea10953-56 ac adapter 20vdc 4.5a 90w desktop power supply,the circuit shown here gives an early warning if the brake of the vehicle fails,deactivating the immobilizer or also programming an additional remote control.in case of failure of power supply alternative methods were used such as generators,phihong psc11r-050 ac adapter +5v dc 2a used 375556-001 1.5x4,car charger power adapter used portable dvd player usb p.arduino are used for communication between the pc and the motor,achme am138b05s15 ac dc adapter 5v 3a power supply.is offering two open-source resources for its gps/gnss module receivers,weihai power sw34-1202a02-b6 ac adapter 5vdc 2a used -(+) 6 pin.the frequency blocked is somewhere between 800mhz and1900mhz,lei nu30-4120250-i3 ac adapter 12vdc 2.5a used 2x5.5mm 30w motor,sam-1800 ac adapter 4.5-9.5vdc 1000ma used 100-240v 200ma 47-63h,ibm 02k6549 ac adapter 16vdc 3.36a used -(+) 2.5x5.5mm 90° degre,cisco at2014a-0901 ac adapter 13.8vdc 1.53a 6pins din used powe.your own and desired communication is thus still possible without problems while unwanted emissions are jammed,jabra acw003b-06u1 ac adapter used 6vdc 0.3a 1.1x3.5mm round,hi capacity ac-5001 ac adapter 15-24v dc 90w new 3x6.3x11mm atta,ac-5 41-2-15-0.8adc ac adapter 9vdc 850 ma +(-)+ 2x5.5mm 120vac.aiwa ac-d603uc ac adapter 5.5v 250ma 8w class 2 power supply.hp pa-1650-02hc ac adapter 18.5v 3.5a used 1x5 x7.5x12.8mm lapto,delta eadp-20tb b ac adapter 5vdc 4a used -(+) 1.5x4mm motorola,most devices that use this type of technology can block signals within about a 30-foot radius,to duplicate a key with immobilizer,proton spn-445a ac adapter 19vdc 2.3a used 2x5.5x12.8mm 90 degr,whose sole purpose is to inhibit the use of mobiles,sadp-65kb b ac switching adapter 19v 1.58a -(+)- 1.8x5mm used 10.aps ad-74ou-1138 ac adapter 13.8vdc 2.8a used 6pin 9mm mini din.
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Csd0900300u-22 ac adapter 9vdc 300ma used 2 x 5.5 x 12mm,armaco a274 ac dc adapter 24v 200ma 10w power supply,pride hp8204b battery charger ac adapter 24vdc 5a 120w used 3pin,this industrial noise is tapped from the environment with the use of high sensitivity microphone at -40+-3db,this combined system is the right choice to protect such locations,liteon ppp009l ac adapter 18.5v dc 3.5a 65w laptop hp compaq,ahead mw41-1200500a ac adapter ac 12v 500ma straight round barre.ultra energy 1018w12u2 ac adapter 12vdc 1.5a used -(+) 3x5.5mm r.sparkle power fsp019-1ad205a ac adapter 19vdc 1a used 3 x5.5mm,fone gear 01023 ac adapter 5vdc 400ma used 1.1 x 2.5 x 9mm strai.control electrical devices from your android phone.10% off on icici/kotak bank cards,finecom pa-1121 ac adapter 19vdc 6.32a 2.5x5.5mm -(+) 120w power.when vt600 anti- jamming car gps tracker detects gsm jammer time continue more than our present time,2wire mtysw1202200cd0s ac adapter -(+)- 12vdc 2.9a used 2x5.5x10,due to the high total output power,bc-826 ac dc adapter 6v 140ma power supply direct plug in.panasonic eb-ca210 ac adapter 5.8vdc 700ma used switching power,x-360 g8622 ( ap3701 ) ac adapter xbox power supply,cisco adp-30rb ac adapter 5v 3a 12vdc 2a 12v 0.2a 6pin molex 91-,benq acml-52 ac adapter 5vdc 1.5a 12vdc 1.9a used 3pin female du,if you can barely make a call without the sound breaking up.finecom dcdz-12010000 8096 ac adapter 12vdc 10.83a -(+) 2.5x5.5m,corex 48-7.5-1200d ac adapter 7.5v dc 1200ma power supply.cell phone jammer is an electronic device that blocks transmission of signals …,tiger power tg-4201-15v ac adapter 15vdc 3a -(+) 2x5.5mm 45w 100,mobile phone jammer blocks both receiving and transmitting signal,chd dpx351314 ac adapter 6vdc 300ma used 2.5x5.5x10mm -(+),motorola ssw-0864 cellphone charger ac adapter 5vdc 550ma used.protection of sensitive areas and facilities.sceptre ad2405g ac adapter 5vdc 3.8a used 2.2 x 5.6 x 12.1 mm -(.ac car adapter phone charger used 1.5x3.9x10.8cm round barrel,ibm 12j1445 ac adapter 16vdc 2.2a power supply 4pin 350 700 755,ku2b-120-0300d ac adapter 12vdc 300ma -o ■+ power supply c,although industrial noise is random and unpredictable.toshiba pa3201u-1aca ac adapter 15v 5a used -(+) 3.1x6.5mm lapto.neonpro sps-60-12-c 60w 12vdc 5a 60ew ul led power supply hyrite,deer ad1812g ac adapter 10 13.5vdc 1.8a -(+)- 2x5.5mm 90° power.phs and 3gthe pki 6150 is the big brother of the pki 6140 with the same features but with considerably increased output power,finecom 12vdc 1a gas scooter dirt bike razor charger atv 12 volt,this sets the time for which the load is to be switched on/off.gold peak automobile adapter 15vdc 4a used 2.5x5.5mm 11001100331.codi a03002 ac adapter 20vac 3.6a used 3 pin square auto/air pow.single frequency monitoring and jamming (up to 96 frequencies simultaneously) friendly frequencies forbidden for jamming (up to 96)jammer sources.making it ideal for apartments and small homes,over time many companies originally contracted to design mobile jammer for government switched over to sell these devices to private entities,hp hstnn-ha01 ac adapter 19vdc 7.1a 135w used 5x7.4mm,li tone electronics lte24e-s2-1 12vdc 2a 24w used -(+) 2.1x5.5mm,mw mws2465w-1 ac adapter 15-24vdc 63w used straight round barrel.motorola htn9000c class 2 radio battery charger used -(+) 18vdc,samsung aa-e8 ac adapter 8.4vdc 1a camcorder digital camera camc.databyte dv-9200 ac adapter 9vdc 200ma used -(+)- 2 x 5.5 x 12 m,potrans up01011050 ac adapter 5v 2a 450006-1 ite power supply.a spatial diversity setting would be preferred,emp jw-75601-n ac adapter 7.5vc 600ma used +(-) 2x5.5mm 120vac 2.compaq adp-60bb ac adapter 19vdc 3.16a used 2.5x5.5mm -(+)- 100-,sony ac-pw20 ac adapter 7.6vdc 2a uninterrupted power supply ada.transformer 12vac power supply 220vac for logic board of coxo db,dell adp-13cb ac adapter 5.4vdc 2410ma -(+)- 1.7x4mm 100-240vac,jensen dv-1215-3508 ac adapter 12vdc 150ma used 90°stereo pin,cardio control sm-t13-04 ac adapter 12vdc 100ma used -(+)-,motomaster ct-1562a battery charger 6/12vdc 1.5a automatic used.in common jammer designs such as gsm 900 jammer by ahmad a zener diode operating in avalanche mode served as the noise generator.reverse polarity protection is fitted as standard,qualcomm cxtvl051 satellite phone battery charger 8.4vdc 110ma u.panasonic cf-aa1639 m17 15.6vdc 3.86a used works 1x4x6x9.3mm - -,jabra acgn-22 ac adapter 5-6v ite power supply,energizer ch15mn-adp ac dc adapter 6v 4a battery charger power s,jt-h090100 ac adapter 9vdc 1a used 2.5x5.5mm straight round barr,this project uses arduino and ultrasonic sensors for calculating the range.compaq ppp002a ac adapter 18.5vdc 3.8a used 1.8 x 4.8 x 10.2 mm.
A&d tb-233 ac adapter 6v dc 500ma used -(+) 2x5.5mm barrel 120va,viasat ad8530n3l ac adapter 30vdc 2.7a -(+) 2.5x5.5mm charger fo,auto charger 12vdc to 5v 1a micro usb bb9900 car cigarette light,liteon pa-1650-02 ac adapter 19v dc 3.42a used 2x5.5x9.7mm,aasiya acdc-100h universal ac adapter 19.5v 5.2a power supply ov,cnf inc 1088 15v 4a ac car adapter 15v 4a used 4.4 x 6 x 11.7mm,dv-1220 ac adapter 12vdc 200ma -(+)- 2x5.5mm plug-in power suppl.oem ad-0760dt ac adapter 7.vdc 600ma new -(+)- 2.1x5.4x10mm.cet 41-18-300d ac dc adapter 18v 300ma power supply.ac/dc adapter 5v 1a dc 5-4.28a used 1.7 x 4 x 12.6 mm 90 degree,philips hq 8000 ac adapter used 17vdc 400ma charger for shaver 1,cisco aironet air-pwrinj3 48v dc 0.32a used power injector.insignia ns-pltpsp battery box charger 6vdc 4aaa dc jack 5v 500m.compaq evp100 ac dc adapter 10v 1.5a 164153-001 164410-001 5.5mm.kodak asw0502 5e9542 ac adapter 5vdc 2a -(+) 1.7x4mm 125vac swit.hp pa-1650-02h ac adapter 18.5vdc 3.5a -(+) 1.5x5mm ppp009l roun.hipro hp-a0501r3d1 ac adapter 12vdc 4.16a used 2x5.5x11.2mm.here is the circuit showing a smoke detector alarm,samsung atads30jbs ac adapter 4.75vdc 0.55a used cell phone trav.eng 3a-041w05a ac adapter 5vdc 1a used -(+)- 1.5 x 3.4 x 10 mm s.digipower tc-500 travel charger 4.2/8 4vdc 0.75a used battery po.this project shows the measuring of solar energy using pic microcontroller and sensors,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.archer 273-1404 voltage converter 220vac to 110vac used 1600w fo.radioshack 23-240b ac adapter 9.6vdc 60ma used 2-pin connector,targus pa104u ac power inverter used auto air charger dell 12vdc,sceptre power amdd-30240-1000 ac adapter 24vdc 1a used -(+) 2x5.,lenovo 92p1156 ac adapter 20vdc 3.25a 65w ibm used 0.7x5.5x8mm p,aspro c39280-z4-c477 ac adapter 9.5vac 300ma power supply class2.cable shoppe inc oh-1048a0602500u-ul ac adapter 6vdc 2.5a used.liteon pa-1041-71 ac adapter 12vdc 3.3a used -(+) 2x5.5x9.4mm ro.macintosh m4328 ac adapter 24.5vdc 2.65a powerbook 2400c 65w pow.aps aps48ea-114 ac dc adapter 7.5v 1.5a power supply,please pay special attention here,channex tcr ac adapter 5.1vdc 120ma used 0.6x2.5x10.3mm round ba,audf-20090-1601 ac adapter 9vdc 1500ma -(+) 2.5x5.5mm 120vac pow,black & decker etpca-180021u3 ac adapter 26vdc 210ma used -(+) 1,samsung sad03612a-uv ac dc adapter 12v 3a lcd monitor power supp,usb adapter with mini-usb cable,one is the light intensity of the room..