upuaut.net Report : Visit Site


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    The main IP address: 104.27.162.116,Your server Singapore,Singapore ISP:CloudFlare Inc.  TLD:net CountryCode:SG

    The description :home about ava hardware hab supplies pictures menu ava high altitude balloon project home of the worlds best all pink payload mounting uputronics lna’s on the mast posted by anthony stirk on 01/11/201...

    This report updates in 25-Aug-2018

Created Date:1999-01-14
Changed Date:2017-01-09
Expires Date:2018-01-14

Technical data of the upuaut.net


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Latitude: 1.2896699905396
Longitude: 103.85006713867
Country: Singapore (SG)
City: Singapore
Region: Singapore
ISP: CloudFlare Inc.

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home about ava hardware hab supplies pictures menu ava high altitude balloon project home of the worlds best all pink payload mounting uputronics lna’s on the mast posted by anthony stirk on 01/11/2016 1 comment one question we get asked at uputronics is do you offer a mast head enclosure for your amps ? well unfortunately not the current case design doesn’t lend itself to being mast mounted. however you can utilise one of the mast mount cases sold by uputronics to mount the uputronics lna ‘s on the mast. here i’ve mounted a pair of lna’s in one enclosure: the cases are supplied with a blank plate so you can drill to your own requirements. i removed the ends from two uputronics lna’s and used the end plates as templates (be careful the endplates are asymetric so make sure you copy the right side or the screws won’t mount). drill the holes (sma’s ~ 6.5mm and the screws are ~ 3.5mm). mount the lna’s on the plates using the original screws. use some 15 cms sma 90′ to sma panel to bring the output back out to the plate: stick it all back together and mount it on the mast. obviously this setup assumes you are using bias tee. it’s not about the gain its about the signal to noise… posted by anthony stirk on 18/09/2015 11 comments stick a preamp in front of your radio. will make reception better right ? well, as with most things in life its not as simple as that. it may have a beneficial effect but it depends on a number of factors, where your preamp is and what your radio is. let me explain. its about the signal to noise, not the gain. gain is helpful but the noise figure (nf) and the linearity (ip3) will ultimately determine the quality of your signal. wikipedia defines the nf as : “ noise figure (nf) and noise factor (f) are measures of degradation of the signal-to-noise ratio (snr), caused by components in a radio frequency (rf) signal chain ” put simply as the signal passes from your antenna to your radio it will degrade in quality (s/n ratio). you can mitigate against this with low loss coax and short runs but you are always going to get some loss. the end game is simple you need to keep that noise figure as low as possible to maintain the signal you’re actually interested in. as for the ip3, wikipedia defines it as: “ in telecommunications , a third-order intercept point ( ip 3 or toi ) is a measure for weakly nonlinear systems and devices, for example receivers , linear amplifiers and mixers . ” the linearity metrics used in the industry (iip3 and oip3) are a relatively complex subject ( see here for a good article ) but the thing to keep in mind is that the linearity of a system should be as high as possible. lower linearity can cause overloading which will lead to a raise in noise floor, intermodulation products (spurs) and finally the desensitizing of the receiver. let’s consider a simple system: antenna -> 10 meters of coax -> receiver. we are going to make some assumptions firstly we are considering 1090mhz reception and the coax is rg174 (which is about 94db/100meters loss at 1090mhz – don’t ever use rg174 for ads-b !). the example radio will be an airspy with a nf of 3.5db. for the purposes of the exercise the nf of coax can be assumed to be the same as the loss. using avago’s appcad we can do a noise calc on the system: so in this system we have a noise figure of 12.90db which is fairly large. so what happens if we stick a lna in there near the antenna ? let’s consider the following system : antenna -> 1 meter of coax -> psa5043+ -> cbp1090ec -> 9 meters coax -> receiver. i’ve broken the uputronics ceramic adsb 1090mhz preamp into its base components, the psa5043+ amp and the cbp1090ec ceramic filter. the psa5043+ has about 15db of gain at 1090mhz. and look at that you’ve brought the nf down to 3.45db which is a large improvement over the system without significantly compromising the linearity (iip3). conversely let’s consider what happens when you plug the preamp in next to your radio: antenna -> 9 meter of coax -> psa5043+ -> cbp1090ec -> 1 meters coax -> receiver. the linearity is very good at an iip3 of over 22dbm, but… see the nf ? 9.49db nearly as bad as the system with no preamp in it. at this level, the receiver could be considered “deaf”. you get the gain and the linearity but the nf is much higher. as you can see, having the preamp close to the receiver won’t improve the sensitivity. some receivers have an lna in the radio itself. so what happens if you plug a preamp into a radio that already has a lna like the sdrplay or the funcube dongle? antenna -> 1 meter of coax -> psa5043+ -> cbp1090ec -> 9 meters coax -> lna equipped reciever. taking the data from the sdrplay datasheet here , at 1090mhz with the internal noise figure nf is 5.19db and the ip3 is -14.86db. as you can see the noise figure (nf) is comparable to, but still higher than on a system with no preamp in the receiver. on the other hand, the linearity degraded dramatically to an iip3 at -19dbm. this means even a moderate interferer can cause severe intermodulation, thus desensitizing the receiver. in summary, a setup with a good antenna system connected to a receiver with a built in lna: may not benefit from having a preamp at the antenna. the presence of a built in lna is detrimental to the linearity and may degrade the signals. so in conclusion: put the preamp as close to the antenna as possible. receivers with a built in lna may not get the most out of an antenna system or preamp. proper gain distribution guarantees better performance than one-size-fits-all solutions, both in terms of sensitivity and strong signals handling. uputronics sell a variety of preamps suitable for use with sdr recievers for 403mhz (radiosonde), 434mhz, 868mhz/flarm and ads-b 1090mhz. ads-b reception rtl vs airspy round 2 posted by anthony stirk on 19/05/2015 6 comments in my previous article i compared an older elonics e4000 based dongle with an airspy for ads-b reception. unsurprisingly the airspy beat the performance of the rtl dongle in all areas. however a number of commenters here http://www.rtl-sdr.com/rtl-sdr-vs-airspy-on-ads-b-reception/ noted the performance of the e4000 dongles wasn’t great for ads-b. so i went out and bought an r820t2 dongle from cozycave.i got the expensive one (£7.85!) the test setup was exactly as before , the airspy and rtl connected via the minicircuits splitter. the airspy providing power to the 1090mhz preamp . airspy was using adsb spy v1.0.0.14 and the rtl 820t2 was using adsb# v1.0.11.1 (both are now packaged with sdrsharp). again the airspy wasn’t correcting using fec/crc and was suppressing duplicates, the adsb# was correcting and using crc and allowing duplicates through. the test was run on a week day for 24 hours from around 20:00 to 20:00. the range results were very similar to the initial tests with the airspy for most part having slightly greater range than the rtl, again in one specific direction over 50km more. but generally it was limited by geography with both radios exceeding 400km over the north sea (outer green ring is 400km). the results from virtual radar showed in the 24 hour period the airspy received over 31 million messages of which 31 were unusable and 111 had bad parity. of these 2.2million were airborne position/velocity. in the same period the rtl820t2 recorded 22.3million messages of which 3 million were unusable, 5523 had bad parity. of these 1.2million were airborne position/velocity. so yes the commenters were correct the rtl820t2 does exhibit much better performance for ads-b reception than its e4000 based counterparts. unsurprisingly the airspy does still exceed the performance of the rtl dongles by a significant amount but you have to draw attention to what an absolute bargain the rtl dongles are. i am going to perform one final test where i compare the airspy to the r820t2 again but this time using dump1090 with –no-fix to prevent the correction of data (duplicates will

URL analysis for upuaut.net


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Whois Information


Whois is a protocol that is access to registering information. You can reach when the website was registered, when it will be expire, what is contact details of the site with the following informations. In a nutshell, it includes these informations;

Domain Name: UPUAUT.NET
Domain ID: 5270560_DOMAIN_NET-VRSN
Registrar WHOIS Server: whois.easyspace.com
Registrar URL: www.easyspace.com
Updated Date: 2017-01-09T12:16:22Z
Creation Date: 1999-01-14T05:00:00Z
Registrar Registration Expiration Date: 2018-01-14T05:00:00Z
Registrar: Easyspace Ltd.
Registrar IANA ID: 79
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +44.3707555066
Reseller: Easyspace Ltd
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Registry Registrant ID:
Registrant Name: Anthony Stirk
Registrant Organization: Anthony Stirk
Registrant Street: 5 Hall Stone Court Shelf
Registrant City: Halifax
Registrant State/Province: West Yorkshire
Registrant Postal Code: HX3 7NY
Registrant Country: GB
Registrant Phone: +44.1274673934
Registrant Phone Ext:
Registrant Fax:
Registrant Fax Ext:
Registrant Email: [email protected]
Registry Admin ID:
Admin Name: Anthony Stirk
Admin Organization: Nevis Computers Ltd
Admin Street: York House 16 Wool Gate Cottingley Business Park
Admin City: Bingley
Admin State/Province: West Yorkshire
Admin Postal Code: BD16 1PE
Admin Country: GB
Admin Phone: +44.1274550910
Admin Phone Ext:
Admin Fax: +44.1274519935
Admin Fax Ext:
Admin Email: [email protected]
Registry Tech ID:
Tech Name: Anthony Stirk
Tech Organization: Nevis Computers Ltd
Tech Street: York House 16 Wool Gate Cottingley Business Park
Tech City: Bingley
Tech State/Province: West Yorkshire
Tech Postal Code: BD16 1PE
Tech Country: GB
Tech Phone: +44.1274550910
Tech Phone Ext:
Tech Fax: +44.1274519935
Tech Fax Ext:
Tech Email: [email protected]
Name Server: NS1.NEVISINTERNET.NET
Name Server: NS3.NEVISINTERNET.NET
Name Server: NS2.NEVISINTERNET.NET
DNSSEC: unsigned
URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/
>>> Last update of WHOIS database: 2017-01-09T12:16:22Z <<<

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Registration Service Provider:
Easyspace Ltd, [email protected]
+44.3707555066
+44.1419316785 (fax)
http://www.easyspace.com
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telephone, or facsimile of mass, unsolicited, commercial advertising or
solicitations to entities other than the data recipient's own existing
customers; or (b) enable high volume, automated, electronic processes that
send queries or data to the systems of any Registry Operator or
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  REGISTRAR EASYSPACE LTD.

  REFERRER http://www.easyspace.com

SERVERS

  SERVER net.whois-servers.net

  ARGS domain =upuaut.net

  PORT 43

  SERVER whois.easyspace.com

  ARGS upuaut.net

  PORT 43

  TYPE domain

DOMAIN

  NAME upuaut.net

NSERVER

  NS1.NEVISINTERNET.NET 164.39.7.101

  NS2.NEVISINTERNET.NET 77.75.187.7

  NS3.NEVISINTERNET.NET 188.39.213.4

STATUS
clientTransferProhibited https://icann.org/epp#clientTransferProhibited
clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited

  CHANGED 2017-01-09

  CREATED 1999-01-14

  EXPIRES 2018-01-14

  REGISTERED yes

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