tomfanning

Or, ironically, too close to the exchange.

https://www.choose.co.uk/guide/exchange-only-line-fibre-broa...

Not dissimilar to how face masks are being made compulsory in shops by the British government.

In 11 days' time.

"Crew Dragon" has been added to the Star Walk 2 app on iOS. Just had a pass over the UK (not visible). This gives an AR view of the sky. It's on the same trajectory as ISS, some number of minutes behind it.

Uh - I've been using Raspbian + .NET Core for ages. Works fine.

pi@pi:~ $ uname -m

armv7l

These sites are all highly likely to be using something known as TLEs (two line element files) or "keps", which come from NORAD, based on radar observations, for their positional data.

https://www.celestrak.com/NORAD/documentation/tle-fmt.php

https://www.celestrak.com/NORAD/elements/

Anything using these TLEs should be identical.

For radio reception, if the problem wasn't pointing calibration, I suspect it was polarisation. There is ~3dB difference between 0 and 45 degrees, but ~25dB difference between 0 and 90 degrees. Therefore either use circularly polarised antennas (e.g. https://www.wimo.com/xquad-antennas_e.html) so you're never more than 45 degrees out, or if it's hand-held, simply twist the antenna for maximum signal strength. The polarisation will vary through the pass.

For some really crappy satellite positioning / radio software that everyone uses because no-one's written a better one yet, check out satpc32.

Allow me to point you to SDRplay who have a line of USB receivers that are far more capable (more sensitive, less overwhelmed by strong signals, wider capture bandwidth, wider frequency range) than any of the RTL dongles, which only cover shortwave (<30MHz) with basically a hack. I like SDR Console as the software for this.

https://www.sdrplay.com/

You are aware it's an animal?

For a good experience may I suggest one of these adapters [1], a genuine NES controller [2], a good NES emulator for your platform, the original Tetris NES ROM, a PC that plugs into a TV, and a TV that has "game mode" to minimise latency (critical for any serious Tetrissing).

[1] http://ebay.co.uk/itm/202526513876

[2] https://www.ebay.co.uk/sch/i.html?_from=R40&_nkw=nes+control...

Airglow!

https://en.wikipedia.org/wiki/Airglow

A good example of this: http://www.home-automation-community.com/arduino-low-power-h...

£60k is a relatively decent IT salary in the UK.

It's probably a couple of junior security researchers.

But your point is still valid.

I'm an amateur radio guy in the UK. I like RF-quiet locations. Not far from me is an ancient thoroughfare up in the hills - Ridgeway. In parts it's relatively remote. I drove up there recently to try and get away from the urban noise and see what I could work / hear. Also to avoid upsetting people with big poles, wires, and lots of RF. While up there, it struck me just how busy it actually still was. When you're sitting there actively expecting it to be devoid of people, it's amazing just how many people there actually still are. So yes, I very much in agreement with this.

As a result of my experience, I'm now planning a trip up to Scotland to find somewhere actually remote to stay for a few days. I find the idea of it being just me and the airwaves very zen.

Backblaze's backup product doesn't support backing up a NAS. It is for backing up a single Windows or Mac computer, and priced as such. They state this policy is to avoid abuse. Fair enough.

Backblaze's object storage product, B2, is priced per GB-month, so you pay for what you use. Fair enough. Because it is charged this way, it is open for whatever creative use developers can come up with.

I use B2 because I'm locked out of using Backblaze Online Backup - and that's fine with me, because it's the right product for the job.

Would love to know what licensing regime / category they are using for this. It definitely isn't ham, because that's non-commercial only. The fact that log period antennas are in use is interesting too - low gain but directional and useful across a broad frequency range - maybe some spread spectrum technology?

As in potentially disruptive to critical-to-life public safety systems, e.g. air traffic control, emergency services communications, I suppose.

Square waves = theoretically infinite harmonics at positive multiples of the fundamental frequency (in practice reducing with order of the harmonic)

Then there's in-band spurs / spurious emissions, different from harmonics.

Honestly, the best route in is to find a local club. For the US: http://www.arrl.org/find-a-club For the UK: http://rsgb.org/main/get-started-in-amateur-radio/first-step... Most nations have a national society that can help signpost you in the same way.

Also, come join /r/amateurradio, there's a pretty friendly, if small, community there, with a weekly "ask anything" thread and an alright "getting started" wiki.

A wireless access point is a completely transparent bridge between wired and wireless networks.

If you want a DHCP server in your Wi-Fi "box", you likely want it to do NAT and DNS as well, and that is a "wireless router".

There's no way these adaptors aren't vulnerable, given the nature of them. In my opinion. Extracting the signal from the mains and feeding it into GNU Radio for demodulation, then subsequent attack, would be an interesting exercise.

There's an altitude slider bottom right.

Kanban is the name of a well-known process management method. The word is Japanese - 看板 - literally meaning "signpost" or "billboard" (thanks Wikipedia).

Apart from them taking 7+ years to not implement the tiniest of UI features https://youtrack.jetbrains.com/issue/JT-4526

Ham radio. 300 baud packet over HF (thousands of miles) is still a thing, as are newer data modes such as PSK31 and the JT family. I'm actively working on 1200 baud projects over VHF FM now. Back in the day BBS was very much in. These days the same tech is more often used for telemetry, tracking etc (APRS). Now you can do it all in software, ref https://github.com/wb2osz/direwolf and friends.

I find I agree.

- lossy vs lossless codecs (PSTN isn't analogue end-to-end any more, but is lossless as far as I'm aware. VoIP seems to have been about squeezing as much traffic down the pipe as possible, at the expense of quality.)

- circuit vs packet switched networks (Congestion, contention, jitter on shared packet switched networks. While I'm sure PSTN doesn't have "physical" circuit switching any more, I do get the impression that high-bandwidth bearers are chopped into fixed-width chunks, like 64k ISDN, and will reach capacity and stop accepting demand rather than degrade individual connections)

For me, wideband audio helps, even with the jitter and lossy codec. This is starting to become common in the UK on cellular calls between smartphones, even between different network providers. Audio bandwidth is comparable to Facetime Audio.

Probably depends on how much bandwidth you are interested in seeing at any given time.

If < ~2MHz and budget is everything, this sort of thing will get you started http://www.ebay.co.uk/itm/272267647631

These guys have iterated on the RTL stick a bit, though expect to pay a bit more: http://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/

If < 8MHz, try this http://www.sdrplay.com (Not an RTL stick, performance FAR better. I own this, it's great.) I notice they have a new model out.

Above that, sky's the limit. Filters are possibly useful on the TV stick but by no means essential.

Antennas - all depends on proximity. If you're in the same room as your RF source, a bit of wire will do, for all but the weakest signals. Beyond that, it depends what you're doing.

My recommendation: Buy the £7 stick, see if it gets the job done for you. If not, try the SDRPlay unit. I own both, they're both good and will likely get the job done.

Software: HDSDR http://www.hdsdr.de/ SDR Console http://sdr-radio.com/ (current beta is excellent with SDRPlay RSP 1)

No affiliation to any links posted.

> I don't think Windows users appreciate the importance of a good command line accessible over SSH for managing headless systems.

You should check out this link - production quality OpenSSH for Windows planned for H1 2016. https://blogs.msdn.microsoft.com/powershell/2015/10/19/opens...

And the iPhone, Samsung Galaxy and others, at least assisted GPS + GLONASS http://en.wikipedia.org/wiki/GLONASS#Receivers

I don't believe that it is valid per RFC 1034 to set the root domain record to be a CNAME.

I found this out when I asked this question a while back: http://serverfault.com/questions/55528/set-root-domain-recor...