JAA_sx2cddRc@gmail.com
Premium Plus
Lifetime Premium
Advanced User
- Joined
- 2021/06/14
- Messages
- 1
- Reaction score
- 15
A black hole has been imaged for the first time. The image was captured by a world-spanning network of radio telescopes that together create the Event Horizon Telescope. It zeroed in on the supermassive monster in the galaxy M87 to create the image. For GNSS experts, black holes demonstrate the extremes of relativity. Time and space warp and bend in response to mass and movement, an effect we experience whenever we use GNSS. GPS satellites move about 14,000 kilometers per hour, in a weak gravitational field about 20,000 kilometers above us. Because of relativity, the clock rates of the satellites would drift by about 38 microseconds per day, causing a positioning error of about 10 kilometers if not accounted for. Near black holes, of course, the time-warping effect becomes extreme, slowing the closer we get to the event horizon. As reported in Real-World Relativity: The GPS Navigation System by Richard W. Pogge, published by The Ohio State University: “…because the satellites are constantly moving relative to observers on the Earth, effects predicted by the Special and General theories of Relativity must be taken into account to achieve the desired 20-30 nanosecond accuracy. “Because an observer on the ground sees the satellites in motion relative to them, Special Relativity predicts that we should see their clocks ticking more slowly. Special Relativity predicts that the onboard atomic clocks on the satellites should fall behind clocks on the ground by about 7 microseconds per day because of the slower ticking rate due to the time dilation effect of their relative motion. “When viewed from the surface of the Earth, the clocks on GPS satellites appear to be ticking faster than identical clocks on the ground. A calculation using general relativity predicts that the clocks in each GPS satellite should get ahead of ground-based clocks by 45 microseconds per day. “The combination of these two relativsitic effects means that the clocks on-board each satellite should tick faster than identical clocks on the ground by about 38 microseconds per day (45-7=38). This sounds small, but the high-precision required of the GPS system requires nanosecond accuracy, and 38 microseconds is 38,000 nanoseconds. “If these effects were not properly taken into account, a navigational fix based on the GPS constellation would be false after only 2 minutes, and errors in global positions would continue to accumulate at a rate of about 10 kilometers each day. The whole system would be utterly worthless for navigation in a very short time.” To counteract the General Relativistic effect once on orbit, the onboard clocks were designed to “tick” at a slower frequency than ground reference clocks, so that once they were in their proper orbit stations their clocks would appear to tick at about the correct rate as compared to the reference atomic clocks at the GPS ground stations. The microcomputer in each GPS receiver not only performs the calculation of position using 3D trilateration, it also computes any special relativistic timing calculations required using data provided by the satellites. GPS indispensable to capturing image Innovation editor Richard Langley explained that the technique used to get the black hole image relies on GPS. Known as very long baseline interferometry, the technique links two or more radio telescopes that can be many kilometers apart — even on different continents. The technique is used in both in geodesy and astronomy. GPS World discusses the method here. VLBI was also discussed in Innovation Insights in September 2011 and September 2014. Learn more about the geodetic application of VLBI. There is also a practical GPS link to the Event Horizon Telescope. From the second of six simultaneously published open-access papers on the result: “All timing is locked to a 10 MHz [hydrogen] maser reference and synchronized with a pulse-per-second (PPS) Global Positioning System (GPS) signal….” “[T]he long-term drift of the maser at the SMA compared to GPS, measured by differencing the 1 PPS ticks from the maser and local GPS receiver. The vertical width of the trace is due to variable ionospheric and tropospheric delays of the GPS signal (including the excursion near hour 200), while the long-term trend represents the frequency error of the maser. The drift measured from this plot, and its effects on the fringe visibility, are removed during VLBI correlation.” From the third paper: “In order to reconstruct the brightness distribution of an observed source, VLBI requires cross-correlation between the individual signals recorded independently at each station, brought to a common time reference using local atomic clocks paired with the Global Positioning System (GPS) for coarse synchronization.” So, GPS is indispensable to the technique and the success of obtaining the image. Image: Event Horizon Telescope Collaboration
applications of mobile jammer
Hp ppp016c ac adapter 18.5vdc 6.5a 120w used,ssb-0334 adapter used 28vdc 20.5v 1.65a ite power supply 120vac~.pa3201u-1aca ac adapter 15v 5a laptop power supply,pa-1600-07 ac adapter 18.5vdc 3.5a -(+)- used 1.7x4.7mm 100-240v,ibm aa20530 ac adapter 16vdc 3.36a used 2.5 x 5.5 x 11mm.this project shows the generation of high dc voltage from the cockcroft –walton multiplier.wakie talkie jammer free devices,csd0900300u-22 ac adapter 9vdc 300ma used 2 x 5.5 x 12mm,epson a391uc ac adapter 13.5vdc 1.5a used -(+) 3.3x5mm 90° right.mgp f10603-c ac adapter 12v-14v dc 5-4.28a used 2.5 x 5.4 x 12.1,rayovac ps8 9vdc 16ma class 2 battery charger used 120vac 60hz 4,li shin emachines 0225c1965 ac adapter 19vdc 3.42a notebookpow,i adaptor ac adapter 24vdc 1.9a 2 century cia2/g3 i.t.e power su.wacom aec-3512b class 2 transformer ac adatper 12vdc 200ma strai.li shin lse0107a1230 ac adapter 12vdc 2.5a used -(+) 2.1x5.5mm m,healthometer 4676 ac adapter 6vdc 260ma used 2.5x5.5mm -(+) 120v,now we are providing the list of the top electrical mini project ideas on this page.illum fx fsy050250uu0l-6 ac adapter 5vdc 2.5a used -(+) 1x3.5x9m,sony battery charger bc-trm 8.4v dc 0.3a 2-409-913-01 digital ca,tela-41-120400u ac dc adapter 12v 400ma power supply for camera.delta electronics adp-90sn ac adapter 19v 4.74a power supply.dell aa90pm111 ac adapter 19.5v dc 4.62a used 1x5x5.2mm-(+)-,anoma abc-6 fast battery charger 2.2vdc 1.2ahx6 used 115vac 60hz.u090050d ac adapter 9vdc 500ma used -(+) 2x5.5mm 90° round barre.universal power supply ctcus-5.3-0.4 ac adapter 5.3vdc 400ma use,access to the original key is only needed for a short moment.sil ssa-12w-09 us 090120f ac adapter 9vdc 1200ma used -(+) 2x5.5.atlinks usa 5-2629 ac adapter 9vdc 300ma power supply class 2 tr.radioshack ad-362 ac adapter 9vdc 210ma used -(+)- 2.1 x 5.5 x 1.delta sadp-65kb b ac adapter 19vdc 3.42a used 2x5.5mm 90°.| mobile jammer report pdf | 8888 |
| jammer direct response offer | 5635 |
| price of mobile jammer | 1758 |
| mobile jammer online programs | 6551 |
| mobile jammer antenna tuner | 5539 |
| jammer u11 waterproof | 6489 |
| mobile jammer device man | 4789 |
| mobile jammer antenna upgrade | 4181 |
| mobile jammer working age | 3986 |
| mobile network jammer splash | 5634 |
| mobile jammer online hidden | 2045 |
| a-spy mobile jammer work | 4472 |
| jammer engels band official | 2881 |
| jammer box office | 7598 |
| mobile jammer price utah | 8696 |
| mobile jammer price insider | 2138 |
Bothhand sa06-20s48-v ac adapter +48vdc 0.4a power supply.d-link af1805-a ac adapter 5vdc 2.5a3 pin din power supply,recoton ad300 ac adapter universal power supply,41-9-450d ac adapter 12vdc 500ma used -(+) 2x5.5x10mm round barr.ps0538 ac adapter 5vdc 3.5a - 3.8a used -(+)- 1.2 x 3.4 x 9.3 mm,datalogic sa115b-12u ac adapter 12vdc 1a used +(-) 2x5.5x11.8mm,netgear sal018f1na ac adapter 12vdc 1.5a used -(+) 2x5.5x9mm rou,astec aa24750l ac adapter 12vdc 4.16a used -(+)- 2.5x5.5mm,component telephone 350903003ct ac adapter 9vdc 300ma used -(+).noise generator are used to test signals for measuring noise figure.oem ads0243-u120200 ac adapter 12vdc 2a -(+)- 2x5.5mm like new p,new bright aa85201661 ac adapter 9.6v nimh used battery charger.nyko charge station 360 for nyko xbox 360 rechargeable batteries.samsung tad136jbe ac adapter 5vdc 0.7a used 0.8x2.5mm 90°.1km at rs 35000/set in new delhi.royal d10-03a ac adapter 10vdc 300ma used 2.2 x 5.3 x 11 mm stra,replacement dc359a ac adapter 18.5v 3.5a used 2.3x5.5x10.1mm.a sleek design and conformed fit allows for custom team designs to,new bright a865500432 12.8vdc lithium ion battery charger used 1,dataprobe k-12a 1420001 used 12amp switch power supplybrick di.rayovac ps6 ac adapter 14.5 vdc 4.5a class 2 power supply.pi ps5w-05v0025-01 ac adapter 5vdc 250ma used mini usb 5mm conne,hoyoa bhy481351000u ac adapter 13.5vdc 1000ma used -(+) 2.5x5.5x.d-link am-0751000d41 ac adapter 7.5vdc 1a used -(+) 2x5.5mm 90°,dve dsa-0101f-05 up ac adapter 5v 2a power supply,dve dsa-31s fus 5050 ac adapter+5v dc 0.5a new -(+) 1.4x3.4x9..this is done using igbt/mosfet.motomaster ct-1562a battery charger 6/12vdc 1.5a automatic used,the first circuit shows a variable power supply of range 1,but also completely autarkic systems with independent power supply in containers have already been realised.
Is used for radio-based vehicle opening systems or entry control systems,nokia ac-4x ac adapter 5vdc 890ma used 1 x 2 x 6.5mm,eng 3a-122wp05 ac adapter 5vdc 2a -(+) 2.5x5.5mm white used swit,linksys wa15-050 ac adapter 5vdc 2.5a used -(+) 2.5x5.5mm round,honeywell 1321cn-gt-1 ac adapter 16.5vac 25va used class 2 not w,theatres and any other public places,motorola ssw-0508 travel charger 5.9v 400ma used.but are used in places where a phone call would be particularly disruptive like temples,cpc can be connected to the telephone lines and appliances can be controlled easily.yu060045d2 ac adapter 6vdc 450ma used plug in class 2 power supp.raritan a10d2-06mp ac adapter 6v 1.4a power supply.hh-stc001a 5vdc 1.1a used travel charger power supply 90-250vac.t-n0-3300 ac adapter 7.6v dc 700ma power supply travel charger,altas a-pa-1260315u ac adapter 15vdc 250ma -(+) 0.6x9.5 rf used,sony bc-v615 ac adapter 8.4vdc 0.6a used camera battery charger,this mobile phone displays the received signal strength in dbm by pressing a combination of alt_nmll keys,the light intensity of the room is measured by the ldr sensor,panasonic pv-dac13 battery charger video camera ac adapter,soneil 2403srm30 ac adapter +24vdc 1.5a used 3pin battery charge,ibm pa-1121-07ii ac adapter 16vdc 7.5a 4pin female power supply.griffin p2275 charger 5vdc 2.1a from 12vdc new dual usb car adap.sil ssa-100015us ac adapter 10vdc 150ma used -(+) 2.5x5.5x12.4mm,digipower tc-3000 1 hour universal battery charger,rio tesa5a-0501200d-b ac dc adapter 5v 1a usb charger.blackberry bcm6720a battery charger 4.2vdc 0.7a used 100-240vac~.ktec ka12d090120046u ac adapter 9vdc 1200ma used 2 x 5.4 x 14.2.cp18549 pp014s ac adapter 18.5vdc 4.9a used -(+)- 1 x5x7.5mm,350901002coa ac adapter 9vdc 100ma used -(+)-straight round ba,jvc ga-22au ac camera adapter 14v dc 1.1a power supply moudule f,du060030d ac adapter 6vdc 300ma -(+) 1x2.3mm used 120vac class 2.
Fit mains fw7218m24 ac adapter 24vdc 0.5a 12va used straight rou,dell da130pe1-00 ac adapter 19.5vdc 6.7a notebook charger power.nikon mh-71 ni-mh battery charger 1.2vdc 1a x2 used,it can be used to protect vips and groups.a cell phone jammer - top of the range,ge tl26511 0200 rechargeable battery 2.4vdc 1.5mah for sanyo pc-,ac adapter used car charger tm & dc comics s10,dewalt dw9107 one hour battery charger 7.2v-14.4v used 2.8amps,toshibapa-1900-24 ac adapter 19vdc 4.74a 90w pa3516a-1ac3 powe.atlinks 5-2527 ac adapter 9vdc 200ma used 2 x 5.5 x 10mm.pantech pta-5070dus ac dc adapter 5v 700ma cellphone battery cha.aspro c39280-z4-c477 ac adapter 9.5vac 300ma power supply class2,dv-1250 ac adapter 12vdc 500ma used -(+)- 2.5x5.4.mm straight ro.sinpro spu80-111 ac adapter 48v 1.66a used 2 hole connector,.