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Ionosphere and layer delays - The satellite signal slows because it passes through the atmosphere. The GPS system uses a intrinsic  model that calculates a mean quantity of delay to partly correct for this sort of error.

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Signal multipath - this happens once the GPS signal is mirrored off objects like tall buildings or giant rock surfaces before it reaches the receiver. This will increase the period of the signal, thereby inflicting errors.
Receiver clock errors - A receiver's intrinsic  clock isn't as correct because the atomic clocks aboard the GPS satellites. Therefore, it should have terribly slight temporal arrangement errors.
Orbital errors - conjointly referred to as annual errors, these ar inaccuracies of the satellite's reportable location.
Number of satellites visible - The a lot of satellites a GPS receiver will "see," the higher the accuracy. Buildings, terrain, electronic interference, or generally even dense foliage will block signal reception, inflicting position errors or probably no position reading the least bit. GPS units usually won't work inside, underwater or underground.
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Satellite geometry/shading - This refers to the relative position of the satellites at any given time. Ideal satellite pure mathematics exists once the satellites ar settled at wide angles relative to every different. Poor pure mathematics results once the satellites ar settled in an exceedingly line or in an exceedingly tight grouping.
Intentional degradation of the satellite signal - Selective convenience (SA) is associate degree intentional degradation of the signal once obligatory by the U.S. Department of Defense. Sturmarbeiteilung was meant to forestall military adversaries from mistreatment the extremely correct GPS signals. the govt turned off Sturmarbeiteilung in might 2000, that considerably improved the accuracy of civilian GPS receivers.
GPS satellites transmit 2 low power radio signals, selected L1 and L2. Civilian GPS uses the L1 frequency of 1575.42 rate within the ultrahigh frequency band. The signals travel line of sight, that means they'll experience clouds, glass and plastic however won't undergo most solid objects like buildings and mountains.
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A GPS signal contains 3 completely different bits of data - a pseudorandom code, annual knowledge and almanac knowledge. The pseudorandom code is just associate degree I.D. code that identifies that satellite is transmittal data. you'll read this range on your Garmin GPS unit's satellite page, because it identifies that satellites it's receiving.
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Ephemeris knowledge, that is consistently transmitted by every satellite, contains necessary data concerning the standing of the satellite (healthy or unhealthy), current date and time. This a part of the signal is important for determinative an edge.

The almanac knowledge tells the GPS receiver wherever every GPS satellite ought to be at any time throughout the day. every satellite transmits almanac knowledge showing the orbital data for that satellite and for each different satellite within the system.

There are several reasons that can cause the error 3194 appears when update or restore an iOS device. Among these reasons are:

iTunes is unable to connect to the update server and restore Apple (gs.apple.com). Generally this failure is due to problems in the Internet from the computer where we have installed iTunes.
The computer you are trying to perform the operation does not have the latest version of iTunes installed.
The iOS version you want to install is not signed by Apple. This happens when we're trying to do is downgrade (go to a previous version of the OS to the iPhone or iPad is installed).
Solution to error 3194 in iPhone, iPad and iPod touch

These are the problems that usually cause the annoying error mentioned. As we can see are pretty generic error and its solution is generally very simple and then describe the most common steps to remedy this failure.

How to solve the Error 3194 when restoring or updating iPad, iPhone or iPod Touch

The first step to try to end this error is to make sure we have the latest version of iTunes installed on your computer. For this we open the program and click on the iTunes menu - Check for updates in case you have a Mac or Help - Check for Updates if we use a Windows PC. If the application locate a new version install and check if the error message 3194 is gone.

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iTunes, the latest version

If after updating the error still appears, the next thing to check is that touches us iTunes can connect seamlessly with the update server. For this review the following points:

File host: some applications modify this file and this can cause the computer can not connect properly with the update server. For review must access / etc / host in the case of Mac or C: \ Windows \ System32 \ drivers \ etc \ hosts on Windows and check if there is no input associated with the URL gs.apple.com. If there is eliminated or discussed putting # in front to avoid having effect and prevent iTunes from connecting to that server.
Firewall: if we have some kind of firewall installed on your computer must allow iTunes can connect to the Internet (both outgoing and incoming traffic), so you can make the checks and timely discharge from said server.
Router: if your router has a specific configuration you may be filtering out certain types of traffic. If we are connected from any public or similar connection may be the reason. If we are doing from a private router, we should review the configuration to rule out a possible filter.
Check Host to correct Error 3194 iOS

After these checks, iTunes should be able to connect seamlessly to the update server. If the problem persists may be the server that is failing and not be forced to wait for Apple to fix the problem. If after waiting a few hours the difficulty persists, check the best we can do is use another computer or connection where we know that updates have been made or restorations smoothly.

Still the problem? Consider these other points

Another reason often make the error 3194 appear is that the version of iOS you are trying to install on our iPad Mini, iPhone, iPad or iPod Touch not signed by Apple. The Cupertino company does not like us to lower our devices version and so a few days of the launch of a new version often stop signs earlier versions. If you are trying to install a version that is not new, it's likely that the error appears for this reason. If so, we should install a newer version and most likely will not have any problem, although it never hurts to make this process in DFU mode to further ensure that everything goes smoothly.



In the following video also explains how the problem is solved. If you need a graphics help on how to follow the steps do not hesitate to check it out. It is in English, but among the indications that we leave in the article and the video images you should have no problem.


If after reviewing all these points still have problems updating or restoring an iOS device error 3194, the best we can do is check from another computer and Internet. If after this the problem persists, we must consult with an authorized Apple service to download more serious problems, although not as usual.

Can you suggest other solutions to error 3194? If so feel free to comment and the same if you doubt any of the steps.