1996 soccer game in the Midwest, (Rick Dikeman image)

Nouméa ground station after the flood

A pencil and a coffee cup show the size of NASA’s teeny tiny PhoneSat

Bonus Hotspot: Naro Tartaruga AUV

Pacific lamprey spawning (photo by Jeremy Monroe, Fresh Waters Illustrated)

“Return of the Bucentaurn to the Molo on Ascension Day”, by (Giovanni Antonio Canal) Canaletto

The U.S. Naval Observatory Alternate Master Clock at 2nd Space Operations Squadron, Schriever AFB in Colorado. This photo was taken in January, 2006 during the addition of a leap second. The USNO master clocks control GPS timing. They are accurate to within one second every 20 million years (Satellites are so picky! Humans, on the other hand, just want to know if we’re too late for lunch) USAF photo by A1C Jason Ridder.

Detail of Compass/ BeiDou2 system diagram

Hotspot 6: Beluga A300 600ST

1. HERE KITTY, KITTY
Nassau County,New York USA
√ IEEE Spectrum blogger Mark Spezio attached a GPS logger to his wandering cat, whose complex journeys centered on a mouse-hunting paradise: Nassau County Storm Water Basin Storage Area. The cat was amazed to see Mark show up at his secret hideaway.

See cat and maps here 

1. HERE KITTY, KITTY
Nassau County,New York USA
√ IEEE Spectrum blogger Mark Spezio attached a GPS logger to his wandering cat, whose complex journeys centered on a mouse-hunting paradise: Nassau County Storm Water Basin Storage Area. The cat was amazed to see Mark show up at his secret hideaway.

See cat and maps here 

2. SUMMER SCHOOL
Slettestrand, Denmark
√ The fourth International Summer School on GNSS has a new location and two new lead sponsors: the European Space Agency and Nokia. It will take place at the Danish GPS Center in Slettestrand, Denmark from September 1–11 and welcomes graduate students, post docs and young professionals.

Limited to 50 students — register soon

3. GNSS for Africa
Trieste, Italy and Abuja, Nigeria
√ Sixty African scientists and engineers from 15 nations met in April in Trieste with European and American GNSS experts to help them jump-start college courses and research programs. The goal: new space-based technology for farming, tracking, monitoring and mapping. Boston University scientist Pat Doherty says that they’ll do the Institute of Navigation–sponsored event again in 2011 in Abuja, Nigeria.

4. LET’S MAKE A DEAL
Kiev/Kyiv, Ukraine
√ Ukraine, with its loyalties split between Europe and Russia, tilted further east with a GLONASS cooperation agreement on May 17. Ukraine ground stations will participate in satellite communications and monitoring and the countries will jointly develop new satnav user equipment. They will “synchronize [some] military technology standards and broaden defense cooperation,” says the Geopolitical Monitor, a “web-based open source intelligence collection and forecasting service.”

5. STORMY WEATHER
√ A solar storm is the prime suspect in April’s loss of control over an Intelsat GEO carrying a GPS Wide Area Augmentation System (WAAS) transponder. Luckily, a number of solar studies are underway now — including NASA’s solar observatory (SDO), which will carry out three experiments this year on the sun’s activity and its effect on space weather.

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The last year of the old century that everyone thought was the first of the new.

When flying was still a delight, rather than a worrisome bother.

When the expected — a global Y2K bug–bitten IT meltdown — didn’t happen, and the much-anticipated but still-unexpected did: the United States turned off GPS selective availability.

Only a decade ago, but a world away: 2000.

The last year of the old century that everyone thought was the first of the new.

When flying was still a delight, rather than a worrisome bother.

When the expected — a global Y2K bug–bitten IT meltdown — didn’t happen, and the much-anticipated but still-unexpected did: the United States turned off GPS selective availability.

On May 2, NASA Administrator Dan Goldin flew to Scotland, pre-empting the Department of Transportation officials scheduled at the GNSS 2000 conference opening session, to tell the world (but particularly Europe) that SA was going away.

Selective availability — or SA — was the practice of dithering the time-of-transmit component of the navigation message in satellite signals so as to degrade the accuracy of unaided GPS positioning: no worse than 100 meters 95 percent of the time. Which was a much less reliable and useful performance standard than GNSS users had come to desire.

I was at the meeting in Edinburgh and remember three things quite clearly: the frost on the steep cobbled streets of the city during my morning runs, the aged single-malt whiskey samples at the evening reception, and Goldin’s imperious and irascible behavior in delivering his message.

This was still in the era of U.S. GNSS hegemony. GLONASS was down and seemingly out. Galileo was a name, not a program. And the first launch of a Chinese satnav/communications system called Beidou wouldn’t happen until later that year.

Meanwhile, the United States appeared to view GNSS as a competitive, zero-sum game. The timing of Goldin’s appearance at the Scotland conference was hardly coincidental. Europe was on the brink of making a substantial financial investment in developing Galileo, and U.S. officials saw turning SA off as a way to demonstrate the altruistic stewardship of GPS as a global resource that needed no alternatives.

As we know, Europe ultimately went ahead with the Galileo program, and Russia has since rebuilt and modernized its GNSS system. But the consequences of the 2000 decision — probably immeasurable at that moment — are still rippling through the world today as the number of GPS receivers in use soars toward the billions.

“The result [of turning off SA] has been an immediate improvement in the position accuracy of the GPS Standard Positioning Service,” Goldin told his Edinburgh audience.

“How much improvement? Yesterday, the GPS receiver in your automobile would have been able to tell you what block you were on. Today, it can tell you whether you are in front of your house or not.”

The NASA administrator didn’t even mention and perhaps couldn’t conceive of what became the real drivers of GPS consumer sales: cell phones and portable navigation devices.

But obviously others could.

The day after Goldin’s announcement, an Oregonian named Dave Ulmer went out and buried what he called a “GPS stash” in rural Clackamas County, posted the coordinates on an Internet bulletin board, and challenged other GPS users to find it. Today, there are more than a million geocaches worldwide and three to four million zealous geocachers — including my sister, nephew, and brother-in-law — scouring the countryside and planting their own latter-day stashes.

More crucially, tens of millions of mobile phones now have the ability to automatically report the location of emergency 911 callers with pinpoint accuracy.

SA is, indeed, finally dead. The GPS III generation of satellites now being developed by Lockheed Martin won’t even have the capability any more.

So, here’s to the anniversary of the end of an idea whose time came and, thankfully, has gone.

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