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NASA Forgets How To Talk To ICE/ISEE-3 Spacecraft
Hugh Pickens DOT Com writes "Randall Munroe's XKCD cartoon on the ICE/ISEE-3 spacecraft inspired me to do a little research on why Nasa can no long communicate with the International Cometary Explorer. Launched in 1978 ISEE-3 was the first spacecraft to be placed in a halo orbit at one of Earth-Sun Lagrangian points (L1). It was later (as ICE) sent to visit Comet Giacobini-Zinner and became the first spacecraft to do so by flying through a comet's tail passing the nucleus at a distance of approximately 7800 km. ICE has been in a heliocentric orbit since then, traveling just slightly faster than Earth and it's finally catching up to us from behind, and will return to Earth in August. According to Emily Lakdawalla, it's still functioning, broadcasting a carrier signal that the Deep Space Network successfully detected in 2008 and twelve of its 13 instruments were working when we last checked on its condition, sometime prior to 1999.
Can we tell the spacecraft to turn back on its thrusters and science instruments after decades of silence and perform the intricate ballet needed to send it back to where it can again monitor the Sun? Unfortunately the answer to that question appears to be no. 'The transmitters of the Deep Space Network, the hardware to send signals out to the fleet of NASA spacecraft in deep space, no longer includes the equipment needed to talk to ISEE-3. These old-fashioned transmitters were removed in 1999.' Could new transmitters be built? Yes, but it would be at a price no one is willing to spend. 'So ISEE-3 will pass by us, ready to talk with us, but in the 30 years since it departed Earth we've lost the ability to speak its language,' concludes Lakdawalla. 'I wonder if ham radio operators will be able to pick up its carrier signal — it's meaningless, I guess, but it feels like an honorable thing to do, a kind of salute to the venerable ship as it passes by.'"
Can we tell the spacecraft to turn back on its thrusters and science instruments after decades of silence and perform the intricate ballet needed to send it back to where it can again monitor the Sun? Unfortunately the answer to that question appears to be no. 'The transmitters of the Deep Space Network, the hardware to send signals out to the fleet of NASA spacecraft in deep space, no longer includes the equipment needed to talk to ISEE-3. These old-fashioned transmitters were removed in 1999.' Could new transmitters be built? Yes, but it would be at a price no one is willing to spend. 'So ISEE-3 will pass by us, ready to talk with us, but in the 30 years since it departed Earth we've lost the ability to speak its language,' concludes Lakdawalla. 'I wonder if ham radio operators will be able to pick up its carrier signal — it's meaningless, I guess, but it feels like an honorable thing to do, a kind of salute to the venerable ship as it passes by.'"
SDR is a thing, and it's not that expensive these days.
The expensive part would be the amplifiers and antennas, and those just spew the signal you feed to them. Generating the signal is cheap.
For large sets, this will be our guide even unto death, for the LORD will work for each type of data it is applied to...
Did anyone else notice the XKCD issue's number is 1337?
Like in any relationship, thing are always changing. One partner moves a little further away, the other becomes disinterested and soon one of them just doesn't understand the other.
I would suggest couple's therapy.
How come Slashdot never gets Slashdotted?
Reading some threads about it yesterday, I found that some hams in Germany have priority access to a 20m dish. Woah.
#naabhaprzrag, #sverubfr-000, #agi-fcbafberq, negvpyr[pynff*=' negvpyr-ary-'] { qvfcynl: abar !vzcbegnag; }
http://xkcd.com/1337/
Oh, wait...
Ydco co
Typically liberal fallacy. You claim, because I want lower taxes, that I want NO taxes. Wrong. I want necessary taxes, minimum waste, minimum government intrusion where it should not intrude.
Excellent, so you agree then we should pull all our troops out of Afghanistan, ASAP, as well as getting our mitts out of Somalia, Libya, Syria, Egypt, Ukraine, etc? We shouldn't be intruding in other people's business, should we? We could easily close 500+ military bases and just, well... stop intruding in other people's business around the world, let them figure it out for themselves.
Sounds like a good start to me. But that's not what the elitist pricks in Washington typically do. Defense contractors are their wealthy friends, while soldiers and sailors are powerless fodder. So they would just shift the money around, cut the VA first, military pensions and salaries next (oh, wait .. they've already started that), make sure that Lockeed and Boeing keep making jets and Northrop Grumman keeps making ships, and continue racking up as much debt as they do now.
"Somebody has to do something. It's just incredibly pathetic it has to be us."
--- Jerry Garcia
Agreed. In 2013, NASA's budget of 17.8 billion dollars made up one half of one percent of the total US budget of about 3.8 trillion dollars. Rounding to the nearest integer, the largest chunk of the budget pie (the Department of Health and Human Services) had a budget 53 times as large as NASA. The Social Security Administration? 50 times. The Department of Defense? 38 times.
To put it another way, we pay 14 NASAs in interest on the national debt!