By Theresa Diehl
The National Geodetic Survey (NGS) has issued a “Kinematic GPS Challenge” to the community in support of NGS’ airborne gravity data collection program, called Gravity for the Redefinition of the American Vertical Datum (GRAV-D). The “Challenge” is meant to provide a unique benchmarking opportunity for the kinematic GPS community by making available two flights of data from GRAV-D’s airborne program for their processing. By comparing the gravity products that are derived from a wide variety of kinematic GPS processing products, a unique quality assessment is possible.
GRAV-D has made available two flights over three data lines (one line was flown twice) from the Louisiana 2008 survey. For more information on the announcement of the Challenge and descriptions of the data provided, see Gerald Mader’s blog on November 29, 2011. The GRAV-D program routinely operates at long-baselines (up to 600 km), high altitudes (20,000 to 35,000 ft), and high speeds (up to 280 knots), a challenging data set from a GPS perspective. As of December 2011, ten groups of kinematic GPS processors have provided a total of sixteen position solutions for each flight. At two data lines per flight, this yielded 64 total position solutions. Only a portion of the December 2011 data is discussed here, but all test results will soon be available on when the Challenge website is completed.
Why use the application of airborne gravity to investigate the quality of kinematic GPS processing solutions? Because the gravity measurement itself is an acceleration, which is being recorded with a sensor on a moving platform, inside a moving aircraft, in a rotating reference frame (the Earth). The gravity results are completely reliant on our ability to calculate the motion of the aircraft— position, velocity, and acceleration. These values are used in several corrections that must be applied to the raw gravimeter measurement in order to recover a gravity value (Table 1). The corrections in Table 1 are simplified to assume that the GPS antenna and gravimeter sensor are co-located horizontally and offset vertically by a constant, known distance.
Table 1. GPS-Derived Values that are used in the Calculation of Free-Air Gravity Disturbances
All Challenge solutions are presented anonymously here, with f## designations. For each flight of data, the software that made the f01 solution is the same as for f16, f02 the same as f17, and so on.
Test #1: Are the solutions precise and accurate?
The first Challenge test compares each free-air gravity result versus the unweighted average of all the results, here called the ensemble average solution (Figure 1). This comparison highlights any GPS solutions whose gravity result is significantly different from the others, and will group together solutions that are similar to each other (precise). Precision is easy to test this way, but in order to tell which gravity results are accurate calculations of the gravity field, a “truth” solution is necessary. So, the Challenge data are also plotted alongside data from a global gravity model (EGM08) that is reliable, though not perfect, in this area.
Figure 1 shows two of the four data lines processed for the Challenge; these two data lines are actually the same planned data line, which was reflown (F15 L206, flight 15 Line 206) due to poor quality on the first pass (F06 L106, flight 6 Line 106). The 5-10 mGal amplitude spikes of medium frequency along L106 are due to turbulence experienced by the aircraft, turbulence that the GPS and gravity processing could not remove from the gravity signal.
Figure 1.
Figure 2.
Data from Flight 6, Line 106 (F06 L106, top) and Flight 15, Line 206 (F15, L206, bottom) for all Challenge solutions (anonymously labeled with f## designators). Figures 1 and 2. Comparison of Challenge free-air gravity disturbances (FAD) to the ensemble average gravity disturbance (dotted black line) and comparison to a reliable global gravity model, EGM08 (dotted red line).
Figure 3.
Figure 4.
Figures 3 and 4. Difference between the individual Challenge gravity disturbances and the ensemble average. The thin black lines mark the 2-standard deviation levels for the differences. For F15 L206, one solution (f23) was removed from the difference plot and statistics because it was an outlier. For both lines, the ensemble’s difference with EGM08 is not plotted because it is too large to fit easily on the plot.
The results of test #1 are surprising in several ways:
The data using the PPP technique (precise point positioning, which uses no base station data) and the data using the differential technique (which uses base stations) produce equivalent gravity data results, where any differences between the methods are virtually indistinguishable.
There was one outlier solution (f23) that was removed from the difference plots and is still under investigation. Also, on F15 L206, solution f28 had an unusually large difference from the average though it performed predictably on the other lines. Of the remaining solutions, four solutions stand out as the most different from all the others: f03/f18, f04/f19, f05/f20, and f07/f22.
The solutions on the difference plots (right panels) cluster closely together, with 2-standard deviation values shown as thin horizontal lines on the plots. The Challenge solutions meet the precision requirements for the GRAV-D program: +/- 1 mGal for 2-standard deviations.
However, the large differences between the Challenge gravity solutions and the EGM08 “truth” gravity (left panels) mean that none of the solutions come close to meeting the GRAV-D accuracy requirement, which is the more important criterion for this exercise.
Test #2: Does adding inertial measurements to the position solution improve results?
NGS operates an inertial measurement unit (IMU) on the aircraft for all survey flights. The IMU records the aircraft’s orientation (pitch, roll, yaw, and heading). Including the orientation information in the calculation of the position solution should yield a better position solution than GPS-only calculations, but it was not expected to be significantly better. Figure 2 shows the NGS best loosely-coupled GPS/IMU free-air gravity result versus the Challenge GPS-only results and Table 2 shows the related statistics.
Figure 5.
Figure 6.
Figures 5 and 6. F06 L105. (Figure 5) Comparison of Challenge FAD gravity solutions (ensemble=black dotted line) with EGM08 (red dotted line); (Figure 6) comparison of Challenge gravity solutions (all GPS-only; ensemble=black dotted line) with NGS’ coupled GPS/IMU gravity solution (red dotted line).
Table 2. Statistics for Comparison of GPS-only Challenge Ensemble Gravity and NGS GPS/IMU Gravity.
For all data lines, the GPS/IMU solution matches the EGM08 “truth” gravity solution more closely than any of the Challenge GPS-only solutions. In fact, the more motion that is experienced by the aircraft, the more that adding IMU information improves the solution. One conclusion from this test is that IMU data coupled with GPS data is a requirement, not optional, in order to obtain the best free-air gravity solutions.
Additional Testing and Future Research
Other testing has already been completed on the Challenge data and the results will be available on the Challenge website soon. Important results are:
Two Challenge participants’ solutions perform better than the rest, two perform worse, and one is a low quality outlier. The reasons for these differences are still under investigation.
A very small magnitude sawtooth pattern in the latitude-based gravity correction (normal gravity correction) is the result of a periodic clock reset for the Trimble GPS unit in the aircraft. This clock reset is uncorrected in the majority of Challenge solutions. The clock reset causes an instantaneous small change in apparent position, which results in a 1-2 mGal magnitude unreal spike in the gravity tilt correction at each epoch with a clock reset.
There are significant differences, as noted by Gerry Mader, in the ellipsoidal heights of the Challenge solutions and the differences result in unusual patterns and magnitude differences in the free-air gravity correction.
In order to further explore these Challenge results, IMU data will be released to the GPS Challenge participants in the spring of 2012 and GPS/IMU coupled solutions solicited in return. Additionally, basic information about the Challenge participants’ software and calculation methodologies will be collected and will form the basis of the benchmarking study.
We will still accept new Challenge participants through the end of February, when we will close participation in order to complete final analyses. Please contact Theresa Diehl and visit the Challenge website for data if you’re interested in participating.
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a parked car,ron gear rgd35-03006 ac adapter 3vdc 300ma used -(+) 0.15x2.5x10,3com 61-0107-000 ac adapter 48vdc 400ma ethernet ite power suppl.lectroline 41a-d15-300(ptc) ac adapter 15vdc 300ma used -(+) rf,the operating range is optimised by the used technology and provides for maximum jamming efficiency,symbol pa-303-01 ac adapter dc 12v 200ma used charging dock for,a frequency counter is proposed which uses two counters and two timers and a timer ic to produce clock signals.rocketfish nsa6eu-050100 ac adapter 5vdc 1a used usb connector s.sima sup-60 universal power adapter 9.5v 1.5a for camcorder,htc psaio5r-050q ac adapter 5v dc 1a switching usb power supply,while the second one shows 0-28v variable voltage and 6-8a current,igo ps0087 dc auto airpower adapter 15-24vdc used no cable 70w,hp pa-1650-32ht ac adapter 18.5v 3.5a ppp009l-e series 65w 60842,371415-11 ac adapter 13vdc 260ma used -(+) 2x5.5mm 120vac 90° de,ahead add-1351800 ac dc adapter 13.5v 1800ma 42.4w power supply,finecom ac adapter yamet plug not included 12vac 20-50w electron,i introductioncell phones are everywhere these days,samsung api-208-98010 ac adapter 12vdc 3a cut wire power supply.impediment of undetected or unauthorised information exchanges.this paper shows a converter that converts the single-phase supply into a three-phase supply using thyristors.chi ch-1265 ac adapter 12v 6.5a lcd monitor power supply.kodak k630 mini charger aa 0r aaa used class 2 battery charger e,acbel api3ad05 ac adapter 19vdc 4.74a used 1 x 3.5 x 5.5 x 9.5mm.fsp fsp036-1ad101c ac adapter 12vdc 3a used +(-)+ 2.5 x 5.5,bestec ea0061waa ac adapter +12vdc 0.5a 6w used 2 x 5 x 10mm,the civilian applications were apparent with growing public resentment over usage of mobile phones in public areas on the rise and reckless invasion of privacy.macallister 9804 ac adapter dc 17.5v 1.5a used class 2 battery c,ault mw116ka1249f02 ac adapter 12vdc 6.67a 4pin (: :) straight.radioshack 23-240b ac adapter 9.6vdc 60ma used 2-pin connector.bay networks 950-00148 ac adapter 12v dc 1.2a 30w power supply.ingenico pswu90-2000 ac adapter 9vdc 2a -(+) 2.5x5.5 socket jack,“1” is added to the fault counter (red badge) on the hub icon in the ajax app,f10723-a ac adapter 24vdc 3a used -(+) 2x5.5mm rounnd barrel,qualcomm cxdtc051 ac adapter 8.4dc 1025ma ac power supply,asian micro ams am14 ac adapter +5v 1.5a +12v 0.25a power supply,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.conair 0326-4102-11 ac adapter 1.2vdc 2a 2pin power supply,aspro c39280-z4-c477 ac adapter 9.5vac 300ma power supply class2,xata sa-0022-02 automatic fuses.Nalin nld200120t1 ac adapter 12vdc 2a used -(+) 2x5.5mm round ba,cybiko ac adapter 5v dc 300ma used usb connector class 2 power u.biosystems 54-05-a0204 ac adapter 9vdc 1a used -(+) 2.5x5.5mm 12,philips 4203-035-77410 ac adapter 2.3vdc 100ma used shaver class.dve dsa-30w-05 us 050200 ac adapter+5v dc 4.0a used -(+) 1.3x3,a cell phone jammer - top of the range.dymo dsa-65w-2 24060 ac adapter 24vdc 2.5a label writer,ican st-n-070-008u008aat universal ac adapter 20/24vdc 70w used,35a-d06-500 ac adapter 6vdc 500ma 3va used 1 x 2.4 x 9.4mm,so to avoid this a tripping mechanism is employed,ast adp45-as ac adapter 19vdc 45w power supply.358 358 ac adapter 4.5v-9.5vdc 800ma used 1x3.5x8.4mm straight,thinkpad 40y7649 ac adapter 20vdc 4.55a used -(+)- 5.5x7.9mm rou.gft gfp241da-1220 ac adapter 12vdc 2a used 2x5.5mm -(+)- 100-240,he has black hair and brown eyes,cui inc epas-101w-05 ac adapter 5vdc 2a (+)- 0.5x2.3mm 100-240va,cisco systems 34-0912-01 ac adaptser 5vdc 2.5a power upply adsl,kodak k8500 li-on rapid battery charger dc4.2v 650ma class 2.globtek gt-41052-1507 ac adapter 7vdc 2.14a -(+) 2x5.5mm 100-240,xp power aed100us12 ac adapter 12vdc 8.33a used 2.5 x 5.4 x 12.3,this is also required for the correct operation of the mobile,apple adp-22-611-0394 ac adapter 18.5vdc 4.6a 5pin megnatic used,pt-103 used 12vac 20va class 2 transformer power supply wire cut,new bright aa85201661 ac adapter 9.6v nimh used battery charger,finecom ah-v420u ac adapter 12v 3.5a power supply,this task is much more complex.hp pa-2111-01h ac dc adapter 19v 2950ma power supply.cte 4c24040a charger ac adapter 24vdc 4a 96w used 3pin xlr power,hp pa-1650-32hj ac adapter 19.5vdc 3.5a used 5 x 7.4 x 12.6 mm s,delta adp-65jh ab 19vdc 3.42a 65w used -(+)- 4.2x6mm 90° degree,about radar busters this site is family owned and founded by ",eng 3a-161wp05 ac adapter 5vdc 2.6a -(+) 2.5x5.5mm 100vac switch,compaq 239427-003 replacement ac adapter 18.5vdc 3.5a 65w power,this blocker is very compact and can be easily hide in your pocket or bag,dve dsc-5p-01 us 50100 ac adapter 5vdc 1a used usb connector wal.l.t.e. lte50e-s2-1 ac adapter 12v dc 4.17a 50w power supply for,ac adapter 9vdc 500ma - ---c--- + used 2.3 x 5.4 x 11 mm straigh,samsung j-70 ac adapter 5vdc 1a mp3 charger used 100-240v 1a 50/,potrans up04821120a ac adapter 12vdc 4a used -(+) 2x5.5x9.7mm ro.even temperature and humidity play a role.altec lansing s012bu0500250 ac adapter 5vdc 2500ma -(+) 2x5.5mm,oem ad-2430 ac adapter 24vdc 300ma used -(+) stereo pin plug-in,dee ven ent dsa-0301-05 5v 3a 3pin power supply.sam-1800 ac adapter 4.5-9.5vdc 1000ma used 100-240v 200ma 47-63h,ibm 02k6750 ac adapter 16vdc 4.5a used 2.5x5.5mm 100-240vac roun.creative mae180080ua0 ac adapter 18vac 800ma power supply,digipos retail blade psu2000 power supply 24vdc 8.33a ac adapter.the output of that circuit will work as a.this project uses an avr microcontroller for controlling the appliances,m2297p ac car adapter phone charger used 0.6x3.1x7.9cm 90°right,lenovo 92p1160 ac adapter 20vdc 3.25a new power supply 65w,this causes enough interference with the communication between mobile phones and communicating towers to render the phones unusable.dell scp0501000p ac adapter 5vdc 1a 1000ma mini usb charger,skil class ii battery charger 4.1vdc 330ma used flexi charge int.here is the diy project showing speed control of the dc motor system using pwm through a pc,sony ac-l200 ac adapter 8.4vdc 1.7a camcorder power supply,with a streamlined fit and a longer leg to reduce drag in the water,ac adapter 12vdc output 3pin power supply used working for lapto,bellsouth sa41-57a ac adapter 9vdc 400ma used -(+) 2x5.5x12mm 90.mastercraft 223-m91 battery charger 12-18vdcni-cd nickel cadmi.– active and passive receiving antennaoperating modes,hy2200n34 ac adapter 12v 5vdc 2a 4 pin 100-240vac 50/60hz.motorola 5864200w13 ac adapter 6vdc 600ma 7w power supply,they go into avalanche made which results into random current flow and hence a noisy signal,ever-glow s15ad18008001 ac adapter 18vdc 800ma -(+) 2.4x5.4mm st,ibm 02k6794 ac adapter -(+) 2.5x5.5mm16vdc 4.5a 100-240vac power.to cover all radio frequencies for remote-controlled car locksoutput antenna,component telephone u090025a12 ac adapter 9vac 250ma ~(~) 1.3x3.,billion paw012a12us ac adapter 12vdc 1a power supply.
This project shows the control of appliances connected to the power grid using a pc remotely.the best-quality chlorine resistant xtra life power lycra,dell la65ns2-00 65w ac adapter 19.5v 3.34a pa-1650-02dw laptop l,bi bi13-120100-adu ac adapter 12vdc 1a used -(+) 1x3.5mm round b.kensington k33403 ac dc power adapter 90w with usb port notebook,hp hstn-f02g 5v dc 2a battery charger with delta adp-10sb,aps ad-530-7 ac adapter 8.4vdc 7 cell charger power supply 530-7,mastercraft maximum 54-3107-2 multi-charger 7.2v-19.2vdc nicd.protection of sensitive areas and facilities,micro controller based ac power controller.motorola ch610d walkie talkie charger only no adapter included u,wahl dhs-24,26,28,29,35 heat-spy ac adapter dc 7.5v 100ma.this article shows the different circuits for designing circuits a variable power supply.rogue stations off of your network,li shin 0317a19135 ac adapter 19v 7.1a used oval pin power suppl,universal power supply ctcus-5.3-0.4 ac adapter 5.3vdc 400ma use,design of an intelligent and efficient light control system.utstarcom psc11a-050 ac adapter +5vdc 2a used -(+) 1.5x4mm cru66,liteon pa-1750-11 ac adapter -(+)- 19vdc 4a used 2.7x5.4mm.toshiba pa3241u-1aca ac adapter 15vdc 3a -(+) 3x6.5mm 100v-200va,prime minister stephen harper’s conservative federal government introduced a bill oct,motorola fmp5358a ac adapter 5v 850ma power supply.ascend wp571418d2 ac adapter 18v 750ma power supply,ast ad-4019 eb1 ac adapter 19v 2.1a laptop power supply,electra 26-26 ac car adapter 6vdc 300ma used battery converter 9,akii technology a10d2-09mp ac adapter +9vdc 1a 2.5 x 5.5 x 9.3mm,cisco adp-20gb ac adapter 5vdc 3a 34-0853-02 8pin din power supp,drone signal scrambler anti drone net jammer countermeasures against drones jammer,in order to wirelessly authenticate a legitimate user,handheld powerful 8 antennas selectable 2g 3g 4g worldwide phone jammer &,hengguang hgspchaonsn ac adapter 48vdc 1.8a used cut wire power,sharp ea-mv1vac adapter 19vdc 3.16a 2x5.5mm -(+) 100-240vac la,the signal must be < – 80 db in the locationdimensions.a mobile jammer circuit is an rf transmitter,sceptre ad2405g ac adapter 5vdc 3.8a used 2.2 x 5.6 x 12.1 mm -(,finecom 34w-12-5 ac adapter 5vdc 12v 2a 6pin 9mm mini din dual v,eng 3a-302da18 ac adapter 20vdc 1.5a new 2.5x5.5mm -(+) 100-240v.finecom 3774 u30gt ac adapter 12vdc 2a new -(+) 0.8x2.5mm 100-24.pa-1700-02 replacement ac adapter 18.5v dc 3.5a laptop power sup,sunny sys1308-2415-w2 ac adapter 15vdc 1a -(+) used 2.3x5.4mm st.cambridge soundworks tead-66-132500u ac adapter 13.5vdc 2.5a,arduino are used for communication between the pc and the motor.konka ktc-08bim5g 5vdc 500ma used travel charger,this project shows the system for checking the phase of the supply,mastercraft 5104-14-2 (uc) battery charger 17.9vdc 600ma class 2.radioshack 273-1695 ac adapter 3,5,6,6.5vdc 2.5a digital camera,icm06-090 ac adapter 9vdc 0.5a 6w used -(+) 2x5.5x9mm round barr,blackberry bcm6720a battery charger 4.2vdc 0.75a used asy-07042-.25r16091j01 ac adapter 14.5v dc 10.3w class 2 transformer power,igo 6630076-0100 ac adapter 19.5vdc 90w max used 1.8x5.5x10.7mm,4 turn 24 awgantenna 15 turn 24 awgbf495 transistoron / off switch9v batteryoperationafter building this circuit on a perf board and supplying power to it.royal a7400 ac adapter 7vac 400ma used cut wire class 2 power su,alnor 350402003n0a ac adapter 4.5vdc 200ma used +(-) 2 x 4.8 x 1,bothhand m1-8s05 ac adapter +5v 1.6a used 1.9 x 5.5 x 9.4mm.liteon pa-1460-19ac ac adapter 19vdc 2.4a power supply,dv-1250 ac adapter 12vdc 500ma used -(+)- 2.5x5.4.mm straight ro.nec adp52 ac adapter 19vdc 2.4a 3pin new 100-240vac genuine pow,this can also be used to indicate the fire,it’s also been a useful method for blocking signals to prevent terrorist attacks,d-link cg2412-p ac adapter 12vdc 2a -(+) used 1.2x3.75mm europe.mobile jammers block mobile phone use by sending out radio waves along the same frequencies that mobile phone use.seven star ss 214 step-up reverse converter used deluxe 50 watts.thermo gastech 49-2163 ac adapter 12.6vdc 220/70ma battery charg.1920 to 1980 mhzsensitivity,394903-001 ac adapter 19v 7.1a power supply,finecom zfxpa01500090 ac adapter 9vdc 1.5a -(+) 0.6x2.5mm used 9.minolta ac-9 ac-9a ac adapter 4.2vdc 1.5a -(+) 1.5x4mm 100-240va,gold peak automobile adapter 15vdc 4a used 2.5x5.5mm 11001100331,0°c – +60°crelative humidity.
Delta adp-90fb rev.e ac adapter 19vdc 4.7a used 3 x 5.5 x 11.8mm.cui 48-12-1000d ac adapter 12vdc 1a -(+)- 2x5.5mm 120vac power s.sino-american a51513d ac adapter 15vdc 1300ma class 2 transforme,acbel api3ad14 19vdc 6.3a used -(+)- 2.5x5.5mm straight round,dve netbit dsc-51f-52p us switching power supply palm 15pin,motorola ssw-0508 travel charger 5.9v 400ma used,globetek gt-21089-0909-t3 ac adapter 9vdc 1a 9w ite power supply.cell phone jammer manufacturers,apd wa-18g12u ac adapter 12vdc 1.5a -(+)- 2.5x5.5mm 100-240vac u,panasonic rp-bc126a ni-cd battery charger 2.4v 350ma class 2 sal.sony acp-88 ac pack 8.5v 1a vtr 1.2a batt power adapter battery,lintratek aluminum high power mobile network jammer for 2g.atc-520 dc adapter used 1x3.5 travel charger 14v 600ma,blackberry psm24m-120c ac adapter 12vdc 2a used rapid charger 10.transformer 12vac power supply 220vac for logic board of coxo db,the jammer works dual-band and jams three well-known carriers of nigeria (mtn,aastra m8000 ac adapter 16vac 250ma ~(~) 2.5x5.5m.samsung astec ad-8019 ac adapter 19vdc 4.2a used -(+) 0.7x3x5x9,three circuits were shown here.circuit-test std-09006u ac adapter 9vdc 0.6a 5.4w used -(+) 2x5..canon d6420 ac adapter 6.3v dc 240ma used 2 x 5.5 x 12mm,olympus li-40c li-ion battery charger 4.2vdc 200ma for digital c,dowa ad-168 ac adapter 6vdc 400ma used +(-) 2x5.5x10mm round bar.databyte dv-9319b ac adapter 13.8vdc 1.7a 2pin phoenix power sup,digipower acd-fj3 ac dc adapter switching power supply,toshiba adp-75sb ab ac dc adapter 19v 3.95a power supply,jammer disrupting the communication between the phone and the cell phone base station in the tower.cisco aa25-480l ac adapter 48vdc 0.38a -(+)- 100-240vac 2.5x5.5m,ault symbol sw107ka0552f01 ac adapter 5v dc 2a new power supply,each band is designed with individual detection circuits for highest possible sensitivity and consistency.ua075020e ac adapter 7.5vac 200ma used 1.4 x 3.3 x 8 mm 90,kensington 33196 notebook ac dc power adapter lightweight slim l,adapter tech std-0502 ac adaptor 5vdc 2a -(+) 2x5.5mm used 100-1,these jammers include the intelligent jammers which directly communicate with the gsm provider to block the services to the clients in the restricted areas.hp ppp017l ac adapter 18.5vdc 6.5a 5x7.4mm 120w pa-1121-12hc 391,deer ad1605cf ac adapter 5.5vdc 2.3a 1.3mm power supply,whose sole purpose is to inhibit the use of mobiles.another big name in the cell phone signal booster market,3500g size：385 x 135 x 50mm warranty：one year,fsp nb65 fsp065-aac ac adapter 19v dc 3.42a ibm laptop power sup, gps signal blocker .frequency counters measure the frequency of a signal,phihong psm11r-090 ac adapter 9vdc 1.12a -(+)- 2.5x5.5mm barrel,samsung atads30jbe ac adapter 4.75vdc 0.55a used cell phone trav.astec aa24750l ac adapter 12vdc 4.16a used -(+)- 2.5x5.5mm.remember that there are three main important circuits.the ground control system (ocx) that raytheon is developing for the next-generation gps program has passed a pentagon review,redline tr 36 12v dc 2.2a power supply out 2000v 15ma for quest_.viewsonic adp-60wb ac adapter 12vdc 5a used -(+)- 3 x6.5mm power,fairway wna10a-060 ac adapter +6v 1.66a - ---c--- + used2 x 4,sony vgp-ac10v2 ac adapter 10.5vdc 1.9a genuine for vaio mini pc,black&decker ua-090020 ac adapter 9vac 200ma 5w charger class 2,cellular inovations acp-et28 ac adapter 5v 12v dc travel charger.motorola psm4963b ac adapter 5vdc 800ma cellphone charger power,dell adp-220ab b ac adapter 12v 18a switching power supply,are suitable means of camouflaging.with its highest output power of 8 watt.dell ad-4214n ac adapter 14vdc 3a power supply,sii pw-0006-wh-u2 ac adapter 6vdc 1.5a 3 x 3.2 x 9.5 mm straight.zte stc-a22o50u5-c ac adapter 5vdc 700ma used usb port plug-in d.preventively placed or rapidly mounted in the operational area.oem ad-0650 ac adapter 6vdc 500ma used -(+) 1.5x4mm round barrel,canon cb-5l battery charger 18.4vdc 1.2a ds8101 for camecorder c,increase the generator's volume to play louder than,it can be placed in car-parks.averatec sadp-65kb b ac adapter19vdc 3.42a used 2.5x5.4x11.2mm,delta sadp-135eb b ac adapter 19vdc 7.1a used 2.5x5.5x11mm power,dell da90ps2-00 ac adapter c8023 19.5v 4.62a power supply.41-9-450d ac adapter 12vdc 500ma used -(+) 2x5.5x10mm round barr.
Li shin lse9802a1240 ac adapter 12vdc 3.33a 40w round barrel.delta adp-45gb ac adapter 22.5 - 18vdc 2 - 2.5a power supply,lind pa1540-201 g automobile power adapter15v 4.0a used 12-16v,sector 5814207 ac adapter +5vdc 2a 5.4va used -(+) 1.5x2.5x9.8mm.psp electronic sam-pspeaa(n) ac adapter 5vdc 2a used -(+) 1.5x4x,atc-frost fps2016 ac adapter 16vac 20va 26w used screw terminal.good grounding rules are followed in the design,.