bandwidth explosion

Fortune 500 is more representative than just one luxury manufacturer

I've done that, though there are places that might interest me if I get less busy. Every choice blocks out other options.

NT

It's my Australian phone. They charge a lot more for data transfers outside Australia - and last year tried to get me to shift to a plan that didn't allow international roaming at all.

I did some of that but wasn't rigorous about it.

Err... how do we know that an immigrant of yesteryear had 'all the paperwork in order' at all times, and was thus 'legal'? The current 'zero-tolerance' rules deport and apply sanctions to a lot of folk, on the basis of rules that are NOT handed down by courts of law. A few months ago, there was a fuss when a failed court appearance was explained thus: the subject of the immigration hearing had been deported the day before.

They got that one back, but if it had been a week before, good luck finding him.

Such problems aren't theoretical, they are very practical.

Over here we've had the "Windrush Scandal". From wackypaedia...

The Windrush scandal is a 2018 British political scandal concerning people who were wrongly detained, denied legal rights, threatened with deportation, and, in at least 83 cases,[1][2][3] wrongly deported from the UK by the Home Office. Many of those affected had been born British subjects and had arrived in the UK before 1973, particularly from Caribbean countries as members of the "Windrush generation"[4] (so named after the Empire Windrush, the ship that brought one of the first groups of West Indian migrants to the UK in 1948).[5]

As well as those who were wrongly deported, an unknown number were wrongly detained, lost their jobs or homes, or were denied benefits or medical care to which they were entitled.[3] A number of long-term UK residents were wrongly refused re-entry to the UK, and a larger number were threatened with immediate deportation by the Home Office.

Rick C wrote in news: snipped-for-privacy@googlegroups.com:

Nope. Initially it was not permitted for consumer level GPS receivers to resolve to 'mil levels'.

After it was OKd it was simply a matter of the chip makers to make a single chip solution needing onlt a single receive antenna device.

It was an 'addition' to the spectrum of what consumers were allowed to access.

On CONSUMER devices.

Back then, it would report a differing location points with each check, every whatever seconds. It did not matter. The military gear, however, did not have this problem.

NIST used to ping your PC from Boulder Colo with a time setting timestamp. It would even make up for latencies in your seral port. Depending on your modem's ISP connection quality, you might see a different time set timestamp every time you check. Mine got down to less than a ms of change each test. Some vary more than a second each time.

A standing test (no motion) is most accurate and repeatable. A moving test relies on 'old data', even if it is only a couple milliseconds old and that causes errors.

Lane position determination is and or should be a purely optical thing.

Joseph Gwinn wrote in news: snipped-for-privacy@news.giganews.com:

GPS signals are the weakest signals we grab. They are right down next to the noise floor.

Joerg wrote in news: snipped-for-privacy@mid.individual.net:

I can still remember thumbing through a Heathkit catalog and dreaming of buying one of the 'high end' PCs they had. And one of their audio amps.

Google Play is the applications purchase store, but also the channel for 'updates' to all those applications you don't use. The automatic updates locked my Android phone up completely when they used up the entire available memory... for invisible files hidden from user scrutiny. There WAS a way to uninstall updates, hidden in the OS, under settings/applications, and also an option to NOT update at all.

It depends how you define the noise bandwidth.

If you use 1.3 MHz, so indeed the signal is well below the full bandwidth noise.

However, for DSSS the proper way would be to measure the bandwidth after despreading, in this case 1 kHz, in which there is a slightly positive SNR.

The actual GPS data rate is only 50 bits/s so the bandwidth is even much less and the SNR clearly positive.

snipped-for-privacy@downunder.com wrote in news: snipped-for-privacy@4ax.com:

-160 dBm

A VERY weak signal. One of the weakest signals the world currently processes.

Short of radiotelescope space noise stuff.

It seems that some mobile navigators use some additional tricks to increase (apparent) accuracy.

With relevant street maps loaded, it appears that it displays a fix point exactly on the road, even if the received fix point was a meter or two outside the road. This becomes obvious then you drive on a highway and then take an exit. The displayed fix continues along the highway even after the intersection. Only after a while, it really believes that you have exited the highway.

That is about right. The noise density for a 300 K antenna temperature is -174 dBm/Hz, which applies to upper VHF. In a 50 Hz bandwidth that would be -157 dBm. However, at lower microwave bands and antennas pointing towards the sky, the antenna temperature is closer to 100 K or about -178 dBm/Hz, so you get a positive SNR at 50 Hz.

Of course, if you insist to compare for a 1.3 MHz noise bandwidth, the total noise would be -117 dBm and with -160 dBm signal you would get

-43 dB SNR :-)

Radio telescopes get good sensitivity due to long integration times (minutes to hours). For this reason, it took quite a long time before pulsars were detected. The first detected pulsars had a repetition rate about 1 Hz, too fast for the long integration times generally used.

I hope no one takes any of these erroneous comments seriously, but then I l ikely don't need to explain that considering the source.

Limiting GPS devices by decree is not a very good way to accomplish whateve r that would be intended to accomplish so they have always done it by techn ical means, i.e. Selective Availability which was turned off in 2000.

There is one limitation that is legally imposed on GPS receivers. They can not operate above some altitude and/or speed of travel to prevent them bei ng used in ICBMs. With the various soft GPS receivers, this is not so effe ctive since the code can be modified to remove this limitation.

I have worked with GPS receivers at several points in my career and I have never been told of any other "legal" limitations on receivers. In fact, th ey use GPS for surveying work where they use long averages to determine loc ation to a wavelength of the GPS carrier, a few inches.

The military now gets better accuracy by using a different signal and modul ation that aren't available to anyone else. Also, there are at least two o ther GPS-like systems and we have no control over how they are received. W AAS was added specifically to improve the accuracy of GPS for civilian use.

More misinformation. They are about 20 dB below the noise floor. We manage to receive them via long averaging using the spreading codes. I expect most here understand the concept.

No, it's not right. It's either -130 dBm or -160 dBW. I got caught in this error when evaluating GPS modules. One manufacturer spec'ed dBW while everyone else used dBm and I called to ask how they could be so much better than anyone else, lol.

So that number is actually -130 dBm and so only -13 dB worse than the noise... lol

I read they found one with a period of just 1.6 us. 600 kHz! Wow.

Even if I would, does that justify in your eyes that someone breaks the law? Are you serious? Try that sort of "logic" in a court.

No, I never knowingly break the law. Illegal aliens do. They do so knowingly and deliberately. They usually continue to do so after illegally hopping the border. For example, by not paying taxes, by using fake social security numbers, by lying on applications.

You have a weird sense of "law".

Then they need to come here the legal way like I did.

So that makes breaking the law legal? Yeah, right.

See? That is what I meant. You do not need SPICE or everything.

Violating a border does show character problems.

I am sure the Dutch army does not.

There is a registration for eveything. When you enterthe country, when you leave it, for how long, et cetera.

I am an immigrant myself. It was not an easy process at all but every i was dotted and evert t was crossed, 100% legal. That is how it should be done.

Hopping a border constitutes breach of the law. It doesn't need a court to decide that to be illegal. The law says so.

That can easily be turned of, doesn't require a new plan. I have roaming limited to very few phone minutes and no data.

With computers there days you have to be rigorous about it and a smart phone is not essentially a computer. Otherwise you'll also expose yourself to data siphoning and unwanted tracking. In some countries that can even be dangerous.