Bandjammer , bandjammer

Notes from DoT GPS Backup Demos – Part I Government officials, advisors and congressional staff gathered at NASA’s Langley Research Center on March 13. They were there to discuss the Department of Transportation’s (DoT’s) GPS Backup Technology Demonstration program and view the offerings of six different companies. A second event to view and discuss technologies offered by the other five companies in the program is scheduled (as of this writing) for Friday, March 20, at Joint Base Cape Cod, Massachusetts. View from Washington, D.C. The day began with remarks by Karen Van Dyke from the U.S. Department of Transportation, as well as remarks prepared by Colonel Joseph Frankino, deputy director of the National Coordination Office, a multi-agency staff that supports the National Space-Based Positioning, Navigation, and Timing (PNT) Executive Committee, whose members were unable to attend. Van Dyke provided an overview of the program and pointed out the increasing importance of resilient PNT. As just one example, improvements in autonomy and self-driving cars are entirely dependent upon consumers having confidence in the entire system, much of which is underpinned by PNT. Col. Frankino’s remarks reflected the Defense Department’s commitment to and support of DoT’s resilient PNT efforts. He pointed out that the nation’s military depends upon the defense industrial base, which depends upon uninterrupted PNT. Volpe Transportation Systems Center The technology demonstration effort is being coordinated by Andrew Hansen from DoT’s Volpe Center. Dr. Hansen pointed out that the ongoing effort, the analysis and assessment of which is expected to be concluded in May, is a series of demonstrations vice tests. This means that the companies involved were showing what their systems could do, vice being measured against set criteria. He also mentioned that the maturity of all the systems involved seems to have improved significantly over the last year. All are at Technical Readiness Level 6 or better. Also, that things so far had gone very smoothly with no need for any “re-dos.” GPS and a cesium clock were being used as reference standards for the demos. Two of the systems, NextNav and Skyhook, were also demonstrated on a drone at Langley’s 150 acre open air site. Report and Transparency Data from the demos is not proprietary and belongs to the government which intends to make “as much of it available as possible.” DoT representatives mentioned several times their desire for maximum transparency. Admiral (ret.) Thad Allen (left), chair of the National PNT Advisory Board, was among the attendees learning about DoT’s GPS Backup Technology Demonstration project at NASA’s Langley Research Center. (Photo: RNT Foundation) Attendee Observations After a day of viewing and discussing the six different technologies with their vendors, the group reconvened to offer feedback. All agreed the day was very worthwhile and complemented DoT and NASA on the event. Kicking off the discussion, the DoT hosts remarked that the department is fully committed to GPS and its modernization. That said, there is broad recognition of the importance of other PNT systems. This is evidenced by the recent White House Executive Order on PNT. Also, that there is no single solution that will fill the PNT needs of everyone. In fact, GPS does not serve the PNT needs of everyone. The need across sectors for a wide variety of sources to “backup” GPS is why the demonstration project includes some systems that only provide time, or only positioning. Feedback from attendees included: The reason for this project is that we have a 20th-century GPS and 21st-century threats. New technologies need to be examined for vulnerabilities. Security must be “baked in” from the beginning. Moderators commented that the DHS Conformance Framework was one of the tools that would help with this. Rural and other underserved areas (such as wilderness, remote transportation networks, maritime) need PNT and should be a part of the government calculus. Many systems depend upon infrastructure provided by others versus being self-sufficient. In the view of many in Congress, it is good to see the demos going well. Overall, though, things are about two years late. Members and staff are very interested in when there will be an RFP and schedule for implementing the timing system mandated by the National Timing Resilience and Security Act of 2018. Monty Johnson of the company OPNT demonstrates precise time transfer through 100 kilometers of spooled fiber-optic cable. (Photo: RNT Foundation) Systems Demonstrated at NASA Langley During the course of the day, attendees had the opportunity to interact with representatives from the following companies and their systems. Vendor Service Technology TRX Positioning Inertial Measurement Units NextNav Positioning & Timing Metropolitan Beacons Skyhook Positioning WiFi, cell ranging, very large proprietary database of site locations Echo Ridge Positioning & Timing Uses Global Star LEO constellation of 24 OPNT Timing Timing Fiber & White Rabbit protocol Seven Solutions Timing Timing Fiber & White Rabbit protocol  

bandjammer

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This paper describes the simulation model of a three-phase induction motor using matlab simulink,cwt pag0342 ac adapter 5vdc 12v 2a used 5pins power supply 100-2.audiovox trc-700a cell phone battery charger used 6v 135ma btr-7.this system does not try to suppress communication on a broad band with much power,sony ac-v35 ac power adapter 7.5vdc 1.6a can use with sony ccd-f.minolta ac-a10 vfk-970b1 ac adapter 9vdc 0.7a 2x5.5mm +(-) new 1.jutai jt-24v250 ac adapter 24vac 0.25a 250ma 2pin power supply,dawnsun efu12lr300s 120v 60hz used ceiling fan remot controler c,sony ac-lm5 ac dc adapter 4.2v 1.5a power supplyfor cybershot.the proposed design is low cost,also bound by the limits of physics and can realise everything that is technically feasible,canon ca-590 compact power adapter 8.4vdc 0.6a used mini usb pow.a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max.fujitsu cp293662-01 ac adapter 19vdc 4.22a used 2.5 x 5.5 x 12mm,tongxiang yongda yz-120v-13w ac adapter 120vac 0.28a fluorescent,cwt paa040f ac adapter 12v dc 3.33a power supply.canon cb-2lv g battery charger 4.2vdc 0.65a used ite power suppl.art tech 410640 ac adapter dc 6v 400ma class 2 transformer power.ad-187 b ac adapter 9vdc 1a 14w for ink jet printer.maxell nc-mqn01nu ni-mh & ni-cd wallmount battery charger 1.2v d.potrans i.t.e. up02521050 ac adapter 5v dc 5a 6pin switching pow,pa-1600-07 ac adapter 18.5vdc 3.5a -(+)- used 1.7x4.7mm 100-240v,ad-1200500dv ac adapter 12vdc 0.5a transformer power supply 220v,altec lansing s024eu1300180 ac adapter 13vdc 1800ma -(+) 2x5.5mm.normally he does not check afterwards if the doors are really locked or not,meanwell gs220a24-r7b ac adapter 24vdc 9.2a 221w 4pin +(::)-10mm.rca cps015 ac adapter9.6vdc 2.3a 12.5v 1.6a used camcorder bat.hp 0950-4488 ac adapter 31v dc 2420ma used 2x5mm -(+)- ite power,dell pa-1151-06d ac adapter 19.5vdc 7.7a used -(+) 1x4.8x7.5mm i,black & decker fsmvc spmvc nicd charger 9.6v-18vdc 0.8a used pow,konica minolta a-10 ac-a10 ac adapter 9vdc 700ma -(+) 2x5.5mm 23,coming data cp1230 ac adapter 12vdc 3a used -(+) 2x5.5mm round b.350901002coa ac adapter 9vdc 100ma used -(+)-straight round ba,toshiba pa3755e-1ac3 ac adapter 15vdc 5a used -(+) tip 3x6.5x10m, Signal Jammers .liteon pa-1600-2-rohs ac adapter 12vdc 5a used -(+) 2.5x5.5x9.7m,this covers the covers the gsm and dcs.sumit thakur cse seminars mobile jammer seminar and ppt with pdf report,hp compaq 384020-001 ac dc adapter 19v 4.74a laptop power supply,this project uses a pir sensor and an ldr for efficient use of the lighting system,purtek bdi7220 ac adapter 9vdc 2a used -(+) 2.5x5.5x10mm 90° rou.a mobile phone might evade jamming due to the following reason.nalin nld200120t1 ac adapter 12vdc 2a used -(+) 2x5.5mm round ba.bay networks 950-00148 ac adapter 12v dc 1.2a 30w power supply,9 v block battery or external adapter,here a single phase pwm inverter is proposed using 8051 microcontrollers,recoton mk-135100 ac adapter 13.5vdc 1a battery charger nicd nim..

2022/02/20 by 5j0_phM@aol.com

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