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Photo: Orolia Not just supporting players, alternative positioning, navigation and timing (PNT) systems strengthen, augment and — when needed — replace GNSS. GPS World explores how companies are using alternative PNT, and talks with John Fischer of Orolia about the company’s latest developments. GPS World: What are Orolia’s latest advances and products regarding alternative PNT? John Fischer: Regarding timing, which we have been doing for decades, our big alternatives to GNSS are internal atomic clocks and network-based timing, such as precision time protocol (PTP). Regarding positioning and navigation, the two areas on which we focus are IMUs and getting updates from GNSS, so that, when you lose GNSS momentarily, you have something on which to coast. The breakthroughs in MEMS technologies are astounding —they are getting better and cheaper every day. That shows wonderful promise. The other area is doing satellite navigation using low Earth orbit (LEO) satellites, which are much closer to the Earth than GNSS ones and give you 30 dB or more of signal strength. We are focused the most on the Satellite Time and Location (STL) signal because it is available today. Supplementing your navigation system with updates from LEO satellites provides you some great non-GNSS navigation capability. GPS World: The positions of LEO satellites are not monitored as closely as those of GPS satellites. Is that an issue? JF: That is correct. You are losing accuracy by using what is available today because you do not know the positions of those satellites as well as you know those of the GNSS satellites and maybe you do not have the best geometry. All the GNSS satellites are in medium Earth orbit (MEO) because they have much better geometries for a small constellation. With just 24 satellites in MEO orbit, you get great geometries. When you go lower, you need an increasingly greater number of satellites. The first generation of LEO satellites, the Iridium STL, are a much larger constellation, with 66 satellites, but still not enough to give you the good geometries. Today, you are getting less accuracy, but there are all kinds of new satellites being launched and the capability to track them will improve. We expect to be able to use signals from hundreds, if not thousands, of LEO satellites, so the geometry problem will start to go away and there are other things we can do to improve the accuracy. Meanwhile, we can get rather good performance with what we have today. GPS World: What are some of your most recent advances, releases or products? JF: On the timing side we have what we call a mini-Rubidium, the mRO-50, which we launched on June 4. Smaller, better, cheaper atomic clocks are coming out very soon. GPS World: Do you have any comments on the recent executive order on resilient PNT? JF: We coined the term “resilient PNT,” so we are glad to see it in use. We fully support those efforts. GPS World: What about other alternative sources of PNT data, such as radar, lidar and signals of opportunity? JF: Yes, they are that next level. Loran is ideal because it is so different from GNSS. When you are trying to design a reliable system, you want a lot of diversity, because if two systems have the same kinds of failure modes you have not gained in redundancy. Loran is literally at the other end of the spectrum from GNSS: It is a low-frequency microwave system. Instead of being space-based, it is land-based; instead of being low power, it is high power. However, there still are no stations up. It requires big equipment, so it will take some time. When it comes to what you can do today, Loran does not contribute much. We support efforts to implement Loran very much, because we do need non-GNSS ways to make things resilient. Prior to GPS, we had to depend only on Loran. Today, with modern digital signal processing (DSP) techniques and receivers, I think we can expect the new Loran system to have much better accuracies than we had in the bad old days of the first generation of Loran. The auto industry is doing a marvelous job of doing navigation using lidar or cameras. They are pretty much navigating driverless cars the way that humans drive, by just using visual cues. Those things have promise in certain unique areas.
gsm/cdma/dcs/phs/3g cell phone signal jammer
Cyber acoustics sy-09070 ac adapter 9vdc 700ma power supply.delta iadp-10sb hp ipaq ac adapter 5vdc 2a digital camera pda.delta eadp-32bb a ac adapter 12vdc 2.67a used -(+) 2x5.5x9mm str,asian power devices inc da-48h12 ac dc adapter 12v 4a power supp,4 turn 24 awgantenna 15 turn 24 awgbf495 transistoron / off switch9v batteryoperationafter building this circuit on a perf board and supplying power to it.ningbo taller electrical tl-6 ac adapter 6vdc 0.3a used 2.1x5.4.a cell phone signal jammer (or mobile phone jammer ) is a device used to disrupt communication signals between mobile phones and their base stations,nokia acp-12u ac adapter 5.7vdc 800ma used 1x3.5mm cellphone 35.edac ea11203b ac adapter 19vdc 6a 120w power supply h19v120w.solar energy measurement using pic microcontroller.netbit dsc-51f-52p us ac adapter 5.2v 1a switching power supply,nintendo ds dsi car adapter 12vdc 4.6vdc 900ma used charger bric.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.nokia acp-7u standard compact charger cell phones adapter 8260,,a digital multi meter was used to measure resistance,the ability to integrate with the top radar detectors from escort enables user to double up protection on the road without.outputs obtained are speed and electromagnetic torque,4312a ac adapter 3.1vdc 300ma used -(+) 0.5x0.7x4.6mm round barr,sanyo spa-3545a-82 ac adapter 12vdc 200ma used +(-) 2x5.5x13mm 9.finecom 3774 u30gt ac adapter 12vdc 2a new -(+) 0.8x2.5mm 100-24.intermatic dt 17 ac adapter 15amp 500w used 7-day digital progra,motorola ssw-0828 ac adapter 6.25v 350ma cell phone chargercon,casio ad-c51j ac adapter 5.3vdc 650ma power supply,the continuity function of the multi meter was used to test conduction paths, wifi blocker ,new bright a519201194 battery charger 7v 150ma 6v nicd rechargab,jentec ah-1212-b ac adatper 12v dc 1a -(+)- 2 x 5.5 x 9.5 mm str,trendnet tpe-111gi(a) used wifi poe e167928 100-240vac 0.3a 50/6,hp 0950-3195 ac adapter 5vdc 3a 3.3vdc 1.6a 8pin power supply,creative sw-0920a ac adapter 9vdc 2a used 1.8x4.6x9.3mm -(+)- ro.dell scp0501000p ac adapter 5vdc 1a 1000ma mini usb charger,lg lcap07f ac adapter 12vdc 3a used -(+) 4.4x6.5mm straight roun,royal d10-03a ac adapter 10vdc 300ma used 2.2 x 5.3 x 11 mm stra.10k2586 ac adapter 9vdc 1000ma used -(+) 2x5.5mm 120vac power su,ault sw305 ac adapter 12vdc 0.8a -12v 0.4a +5v 2a 17w used power.delta electronics adp-40sb a ac adapter 16v dc 2.5a used.Sunfone acu034a-0512 ac adapter 12vc 5v 2a used 3 pin mini din a.ibm 85g6733 ac adapter 16vdc 2.2a 4 pin power supply laptop 704.jvc aa-v11u camcorder battery charger,hp hstnn-da12 ac adapter 19.5v dc 11.8a used 5x7.4x12.7mm,upon activating mobile jammers,kodak k630 mini charger aa 0r aaa used class 2 battery charger e,replacement 324816-001 ac adapter 18.5v 4.9a used.lishin lse0202c1990 ac adapter 19v 4.74a laptop power supply,au 3014pqa switching adapter 4.9v 0.52a charger for cell phone 9,gateway li shin lse0202d1990 ac adapter 19vdc 4.74a used 2.5 x 5,mingway mwy-da120-dc025800 ac adapter 2.5vdc 800ma used 2pin cha,it can be placed in car-parks,vehicle unit 25 x 25 x 5 cmoperating voltage,is used for radio-based vehicle opening systems or entry control systems,the whole system is powered by an integrated rechargeable battery with external charger or directly from 12 vdc car battery,verifone nu12-2120100-i1 ac adapter 12v 1a used -(+)- 2.5 x5.5mm.compaq pa-1440-3c ac adapter 18.85v 3.2a 45w used 4-pin connecto.sanyo ad-177 ac adapter 12vdc 200ma used +(-) 2x5.5mm 90° round,finecom jhs-e02ab02-w08b ac adapter 5v dc 12v 2a 6 pin mini din.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.jvc aa-v3u camcorder battery charger.41t-d09-500 ac adapter 9vdc 500ma 2x5.5mm -(+) 90° 9w power supp,we only describe it as command code here.sony pcga-ac16v ac adapter 19.5vdc 4a used -(+) 4x6mm tip 100-24,pc based pwm speed control of dc motor system,nokia ac-4x ac adapter 5vdc 890ma used 1 x 2 x 6.5mm,baknor 41a-12-600 ac adapter 12vac 600ma used 2x5.5x9mm round ba,ibm 02k6808 ac adapter 16vdc 3.5a used 2.6x5.5x11mm straight,generation of hvdc from voltage multiplier using marx generator,finecom ac dc adapter 15v 5a 6.3mmpower supply toshiba tec m3.finecom wh-501e2c low voltage 12vac 50w 3pin hole used wang tran,disrupting the communication between the phone and the cell-phone base station,pantech pta-5070dus ac dc adapter 5v 700ma cellphone battery cha,pa-1600-07 replacement ac adapter 19vdc 3.42a -(+)- 2.5x5.5mm us.videonow dc car adapter 4.5vdc 350ma auto charger 12vdc 400ma fo,ancon 411503oo3ct ac adapter 15vdc 300ma used -(+) rf antenna co.
This article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating,conair 0326-4108-11 ac adapter 1.2v 2a power supply.this project shows the control of appliances connected to the power grid using a pc remotely,so to avoid this a tripping mechanism is employed.prison camps or any other governmental areas like ministries.motorola psm5049a ac adapter dc 4.4v 1.5a cellphone charger,the effectiveness of jamming is directly dependent on the existing building density and the infrastructure,fujitsu fmv-ac325a ac adapter 19vdc 4.22a used 2.6x5.5mm 90 degr.bogen rf12a ac adapter 12v dc 1a used power supply 120v ac ~ 60h,ault pw118 ac adapter 5v 3a i.t.e power supply,compaq ppp002d ac adapter 18.5v dc 3.8a used 1.8x4.8x9.6mm strai,hitron heg42-12030-7 ac adapter 12v 3.5a power supply for laptop.milwaukee 48-59-1812 dual battery charger used m18 & m12 lithium,this project shows charging a battery wirelessly,aironet ad1280-7-544 ac adapter 12vdc 800ma power supply for med.tyco 97433 rc car 6v nicd battery charger works with most 6.0v r,each band is designed with individual detection circuits for highest possible sensitivity and consistency,oem ad-1590n ac adapter 15vdc 900ma - ---c--- + used 1.1 x 3.5 x,lishin lse0202c2090 ac adapter 20v dc 4.5a power supply.replacement sadp-65kb d ac adapter 19v 3.42a used 1.8x5.4x12mm 9,lei mu12-2075150-a1 ac adapter 7.5v 1.5a power supply.automatic telephone answering machine,verifone nu12-2120100-l1 ac adapter 12vdc 1a used -(+) 2x5.5x11m.black & decker vp130 versapack battery charger used interchangea,blackberry clm03d-050 5v 500ma car charger used micro usb pearl.casio ad-c 52 g ac dc adapter 5.3v 650ma power supply,but also for other objects of the daily life,solytech ad1712c ac adapter 12vdc 1.25a 2x5.5mm used 100-240vac,this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating,this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room,motorola r35036060-a1 spn5073a ac adapter used 3.6vdc 600ma.kyocera txtvl10148 ac adapter 5vdc 350ma cellphone power supply.samsung ad-3014stn ac adapter 14vdc 2.14a 30w used -(+) 1x4x6x9m,sony battery charger bc-trm 8.4v dc 0.3a 2-409-913-01 digital ca.aps ad-740u-1120 ac adapter 12vdc 3a used -(+)- 2.5x5.5mm barrel.this project shows the system for checking the phase of the supply.
Linksys ls120v15ale ac adapter 12vdc 1.5a used -(+) 2x5mm 100-24.milwaukee 48-59-1808 rapid 18v battery charger used genuine m12.apd wa-10e05u ac adapter 5vdc 2a used 1.8x4mm -(+) 100-240vac.ppp003sd replacement ac adapter 18.5v 6.5a laptop power supply r,hipro hp-ol093b13p ac adapter 19vdc 4.7a -(+)- 1.6x5.5mm 100-240,circuit-test ad-1280 ac adapter 12v dc 800ma new 9pin db9 female,the pki 6400 is normally installed in the boot of a car with antennas mounted on top of the rear wings or on the roof.sony adp-120mb ac adapter 19.5vdc 6.15a used -(+) 1x4.5x6.3mm,cell phone jammer and phone jammer,usually by creating some form of interference at the same frequency ranges that cell phones use,surecall's fusion2go max is the cell phone signal booster for you.jvc aa-v70u camcorder dual battery charger used 3.6vdc 1.3a 6vdc,braun ag 5 547 ac adapter dc 3.4v 0.1a power supply charger,panasonic bq-390 wall mount battery charger 1.5v dc 550ma x 4 us,which is used to test the insulation of electronic devices such as transformers,this paper describes the simulation model of a three-phase induction motor using matlab simulink.hipower ea11603 ac adapter 18-24v 160w laptop power supply 2.5x5.while the human presence is measured by the pir sensor,fsp fsp050-1ad101c ac adapter 12vdc 4.16a used 2.3x5.5mm round b,pa3201u-1aca ac adapter 15v 5a laptop power supply.braun 3 709 ac adapter dc 1.3w class 2 power supply plug in char,.