Showing posts with label GPS. Show all posts
Showing posts with label GPS. Show all posts
March 03, 2012

NextGen ATC vs China, Al Queda, and Vinny and the Housewives of New Jersey


The United States has the world's most advanced and safest air navigation system. The problem with a mature successful system is for the vendors; while there's a minor upgrade every few years, the Industry really doesn't get to sell any more major new systems.

Unless they get some magic beans that will change everything. What would be an attractive list of sizzle attributes for marketing's bullet list? Reduce delays. Shorten flights. Improve the carbon footprint. (better stop there).

So they design a new system, call it NextGen ATC, and the vendors design a very, very expensive system. These magic beans are so expensive that the country will have to scrap the existing, world's-best legacy, outdated system completely and put all our future eggs in the vendor's NextGen basket. Why is the vendor's system so expensive? Where does the money go? To the Vendors, silly.

What are the vendors selling? Are they going to develop a startling new technology for their share of the public treasure? No, they're going to misappropriate leverage the GPS network. Let me say this another way: they're going to sell the public a system based on the free, existing GPS network that the public has already paid for. Wow, these guys went to some college.

GPS is the basis of Industry's NextGen bundle, because it provides a capability that Industry doesn't have to pay for or maintain. It's free; it's ubiquitious.

Unintended Consequences of Free and Ubiquitious

The problem with free and ubiquitious is that people start using it for creative secondary reasons, and those applications can bring unintended consequences to other participants.

A New York financier saw an arbitrage opportunity and invested in what he thought was an undervalued frequency spectrum. He formed a company, LightSquared (e=mc2), bought the spectrum at a bargain (from the public, btw) and attempted to exploit the space by using the spectrum for wide scale, metropolitan WiFi (the internet - another free ubiquitious thingy). (LightSquared's founder Philip Falcone is the 540th richest person in the world, the 188th richest in the United States, and is apparently too young to have read Bonfire of the Vanities.)

Unfortunately, LightSquared's use of their spectrum caused problems for everybody's GPS.
Without getting too technical, GPS uses a satellite way up high to send a teeny weeny faint radio signal to your WalMart GPS which was produced on razor-thin margins. In other words, GPS requires a cheap-as-possible device to receive and process a very faint signal. For a long time it worked, because nobody was using the adjacent spectrum.

LightSquared wanted to use the adjacent spectrum and place fairly relatively low-power transmitters all around cities (with airports) to provide MetroWiFi. Their low power tranmitters put out a much stronger signal than the far-away satellites.

LightSquared wasn't just threatening RadioShack; LightSquared was threatening everybody's use of the free/ubiquitious GPS. In particular, LightSquared pissed off the John Deere tractor company, which upsells tractors with GPS navigation, and so their Senator became very concerned about GPS integrity.

There's nothing wrong with LightSquared's technical approach. The problem is that billions of existing GPS receivers aren't shielded for interference, and aren't built to identify the legitimate satellite signal. LightSquared unintentionally exposed an essential, flawed assumption in relying on GPS.

LightSquared lost because the Homeland Security Military Industrial Complex (HSMIC) commissioned studies and wrote papers that said, Establishing low-power transmitters in LightSquared's spectrum will disable all GPS air navigation for that region. Wow. wow Wow wow Wow. wow.

We have no love for LightSquared or Falcone, who was attempting to become rich by exploiting an undervalued national asset, which is a bit like stealing from your children. It is intriguing that the HSMIC would publicly confirm that a series of low-power transmitters could disable GPS air navigation just when we're about to throw away the robust, decentralized legacy outdated system in favor of a single-point-of-failure, easily jammable pure-play GPS NextGen system.

I mean, Holy Asymmetric Warfare, Batman! Haven't we recently seen American aviation grounded by asymmetric techniques? Are we really about to decommission the existing robust, decentralized system and replace it with something that can be disabled with a few low-powered transmitters?

The Asymmetric Scenario

Here's the script: a non-state, religious-based network that's upset because we're occupying their 'stan places electronic transmitters in ten US metroplexes. The transmitters are innocuous; they look like laptop power supplies. They're programmed to turn on and off in a consistent, intermittent pattern during the day; each city's network will go active two days a month. Monday it's Newark; Tuesday it's Dallas; Wednesday is LosAngeles; Thursday is Chicago; Friday is Atlanta. Week two is Philadelphia, Boston, San Francisco, Houston, Seattle. Get the flick? They plug these devices in on the first of the month and walk away; they're in storage units, rental houses, etc. They've just shut down the domestic GPS aviation system, because the uncertainty is unacceptable.

To be fair, radio-based air navigation has always been subject to intentional, adversarial interference (MIJI). It's nothing new. The difference is that existing systems can be overcome by high-powered transmitters and those are relatively easy to find and deal with. The faint GPS signals can be thwarted by a few low-power transmitters that are very hard to find when deployed as a noisy network.

  • The early concern about switching to NextGen is: China can shoot down satellites, and NextGen requires satellites.
  • The asymmetric concern about NextGen is: a very low cost, hard to track, easily deployable grid of low-powered transmitters will render GPS unusable to aviation, and NextGen requires GPS.

I find the second issue (asymmetric vulnerability) more concerning than the first (China). But now it seems that the greatest risk of all is a guy named Vinny and the housewives of New Jersey, and the many people like them.

NextGen ATC vs Vinny & the Housewives of N.J.


Here's a story. The facts are fudged but there's truth in it; there are links to the official reports below. There's a guy named Vinny who lives in Fort Lee, New Jersey with his wife. Vinny's girlfiend lives in Passaic, which is far enough away that they're not likely to see each other in church, but close enough that he can get over there occasionally.

Vinny thinks the wife suspects something. She watches Housewives of New Jersey, which is kind of an aspirational drama for her. Vinny knows The Wife could slip a GPS tracker into his car and he'd never know it, so he seeks advice from his cousin Joey.

Joey works for a delivery company where they put GPS trackers in every vehicle to optimize efficiency - which means, keeping the guys from napping. His cousin went to Google and typed in, GPS blocker jammer and found a solution. Now on rough days Joey turns on the jammer gizmo, drives to a park and takes a nap. Fuggedaboudit.

Vinny does the same thing. He buys a personal GPS jammer and turns it on before he sneaks over to Passaic for an assignation. Unfortunately, when he drives by Newark Liberty Airport on the Turnpike, his GPS jammer blocks the GPS signal. Two pilots report the outage and it's a major snafu. The technicians come out but now everything's working fine because Vinny has moved on. At the airport people try to figure out what happened over coffee and bagels; it's hard to troubleshoot a phantom event. Fuggedaboudit.



About ninety minutes later, the pilots are reporting GPS problems again. Guess what? Vinny is going home to Fort Lee. The technicians scurry all around and chaos reigns again, but a while later everything seems fine.

Both Fox News and The Economist carried this story. The geeks are all over this; WIRED magazine's article was titled, The $30 GPS Jammer that could paralyze US Cities, and they suggest there's a lot more involved than aviation, because a lot of embedded systems use the GPS time-stamp as an essential component.

The Newark Airport has never been able to commission their public-private-partnership (PPP) Honeywell GPS ground-based augmentation system (GBAS) in spite of their great desire to do so, because between deliverymen and philandering spouses like Vinny, there's a lot of people on New Jersey highways with GPS jammers.

There is, remarkably, a public version of the official report online which details the profusion of GPS jamming devices along the New Jersey Turnpike. The report documents multiple days with multiple GPS jamming events. Vinny is Legion.

Back to Vinny. We don't know if Mrs. Vinny ever got a GPS tracker, all we know is that Vinny is a weasel scoundrel who was afraid of being discovered. He was afraid she could be a wannabe Housewife of New Jersey and buy a GPS tracker, so Vinny invested in some electronic countermeasures (ECM). (Probably, next season, the Housewives will deploy drones.)

Vinny's compromise of the Newark airport was driven by his desire to not get caught in adultery. That is a rational, non-trivial, universal motivation.

Any engineering system faces forces that would work against it. Bridges, for instance, must deal with wind and tides. If NextGen has to contend with nervous adulterers for operational reliability, it is doomed from the start. And I think that's an argument that most Congressmen could relate to.


China? Fuggedaboudit. Think about Vinny and the recent LightSquared documentation, and the wisdom of replacing the legacy system with a GPS system.

June 06, 2010

(Solar) Weather Delays: A Curious Juxtaposition

I had two headlines in my inbox that suggest a curious juxtaposition.

First was a story about Boeing ATC being awarded a major research & development support contract worth up to $1.7 billion for the Next-Generation Air Transportation System. They're going to shift from air traffic control to air traffic management.

A large portion of this effort is moving from a ground-based system to a space-based system, moving facilities from the (existing) ground grid to satellites, and moving decision making from the (existing) command-and-control structure to a systemic, profitability-sensitive collaborative model.

Which is good news for primary beneficiaries Boeing, Lockheed Martin, Airbus and Cessna, and secondary beneficiaries Adacel, Ensco, Embry-Riddle Aeronautical University, Harris, Honeywell, Jeppesen, Jerry Thompson & Associates, Mosaic ATM, Spectrum Software Technology, Tetra Tech ATM, and the Washington Consulting Group. The entire military-industrial complex is eating at this trough.

Second is a story from NASA about expected increases in solar activity over the next decade, which have the ability to compromise GPS, satellites, space-based systems, and datalink communications.

The new National Space Weather Program notes how "people of the 21st-century rely on high-tech systems for the basics of daily life. Smart power grids, GPS navigation, air travel, financial services and emergency radio communications can all be knocked out by intense solar activity. A century-class solar storm, the Academy warned, could cause twenty times more economic damage than Hurricane Katrina."

I'm just wondering: are they reading each other's press releases?

December 11, 2009

GPS Road Tax and Big Brother

Traditionally consumers pay for roads through a gasoline tax. The more you drive, the more you pay (at a linear rate). There are two perceived problems with this approach:
(1) as we move into electric/hydrogen cars, the tax base supported by gasoline-fueled vehicles diminishes, and
(2) the gasoline tax is a rather blunt instrument, which doesn't support nuanced applications like congestion-based pricing (city centers or crowded highways during peak hours).
An alternative to a gasoline-based road tax is a mileage tax utilizing GPS. The Netherlands has announced their intention to implement a GPS mileage tax, and in the US there's interest in Oregon, California, and Massachusetts.

One of the problems with GPS-based road taxes is that there's no infrastructure to support it. We'd have to install a GPS in each car, establish a reporting system, and build a new agency to administer the program.

Another problem is privacy; I may not want Big Brother to have records of where my car has been. Advocates of a GPS-based road tax are quick to promise that the GPS data will only be used for revenue, and possibly for some criminal investigations.

That's what leads me to this week's news about how in the United States, Sprint/Nextel's Electronic Surveillance Department has provided GPS location data about its wireless customers to law enforcement over 8 million times in 13 months.

Paul Taylor, the Sprint/Nextel Electronic Surveillance Manager, said: We turned on the web interface for law enforcement about one year ago last month, and we just passed 8 million requests. So there is no way on earth my team could have handled 8 million requests from law enforcement, just for GPS alone. So the tool has just really caught on fire with law enforcement. They also love that it is extremely inexpensive to operate and easy (to use).

That's just one telecom company, giving up location info 8 million times over 13 months, without any interaction with the courts. No checks and balances - the police go to the web portal, submit their request, and they get the info.

This blog describes how "the government routinely obtains customer records from ISPs detailing the telephone numbers dialed, text messages, emails and instant messages sent, web pages browsed, the queries submitted to search engines, and geolocation data, detailing exactly where an individual was located at a particular date and time."

Personally, I'm not pleased about my cellphone reporting my whereabouts to the authorities without a court order. It's not that I live a Tiger Woods lifestyle, but I believe I have a right to be left alone, free from surveillance unless a court issues a warrant.
October 29, 2009

Google: Exordium and Terminus, aka 2525

On Wednesday Google introduced two new concepts. Concept One is that the beta Android operating system contains free Google mapping. Stock prices for Garmin and TomTom (people that sell GPS mapping) are down. Another industry based on selling arcane information on a retail basis challenged by the Google the Category Killer.

Concept Two is Music Search: when you type a song title into Google, you'll get four results that are Google's attempt to let you hear that song.

I wanted to test drive this, so I Googled the title of a favorite song from my youth: 2525. The song is really titled Exordium and Terminus, by Zager and Evans, but I tried the more obscure '2525' just to see what Google did. (Exordium means beginning, and terminus means end.)

Google returned two videos of the song, and two videos of a television show called "Cleopatra 2525". Not bad in the way of search results.


One of the links was this excellent video, made decades after the song was recorded, and I thought I'd include it here because (1) it's a value-added update to an old fave, and (2) it connects to my previous post about Wired For War.

Without further ado, here is
Exordium and Terminus by Zager and Evans: