When I made a post discussing the weather station on NASA’s Phoenix Mars Lander titled “First Weather Station on the Surface of Mars“, I expressed some concern that there might be something wrong with the meteorological package due to the first photo of the MET mast showing something dangling:
And I jokingly wrote: “Given that this mission was put together on a low budget, using parts previously designed for other spacecraft, it makes me wonder if the weather station we see above isn’t simply this low tech device“.
After further research, I’m forced to conclude that in fact, NASA did send a “weather rock” to Mars as part of the meteorological package!
Yes I know, you still don’t believe me, so here are the technical details. The instrument is called the “Telltale Project” and it was developed by the Mars Simulation Laboratory at the University of Aarhus in Demark.
In their project page about the instrument they write:
The Telltale is a passive wind indicator for the 2007 NASA Phoenix lander developed and constructed at the Mars Simulation Laboratory at the Aarhus University.
The Telltale consists of a gallows that is mounted on the top of the Meteorological Mast of the Lander. The active element of the instrument is an extremely lightweight Kapton tube hanging in Kevlar fibres. Images taken of the instrument will show the deflection of the Telltale due to the wind. A mirror is mounted below the active part to enable better direction information. Full resolution JPG (24 kB)
Click for a larger image.
Part of the Phoenix lander showing the Telltale on top of the Meteorological Mast ©NASA/JPL
So there you have it, what originally looked like a possible malfunction in the first photo of the first weather station on Mars turned out to be an accurate representation of the instrument, an instrument not unlike that of the “weather rock” found as a novelty item all over the world. Truth is indeed stranger than fiction.
In other news, I’m told that inside the MET package box, NASA has included several of these, monitored by a tiny camera, to assist in weather forecasting of seasons on Mars. 😉
UPDATE: The first day’s weather report from Phoenix Lander on Mars is now available, see below:
I have heard that the Atmospheric CO2 level in Mars is 95,6%. How come it is so cold there then? On the earth it is 0,04% and the temperatures are said to be rising. So if CO2 rules the climate, why is it so cold at mars?
REPLY: The gas volume and resulting pressure of the Martian atmosphere is much lower, about 8 millibars compared to Earth’s normal atmosphereic pressure of 1017 millibars. So even though the percentage of CO2 is much higher, there is far less of it. – Anthony
saskboy (17:46:49) :
“I wonder if a “dust gauge” would be practical, since a “rain gauge” is pretty much useless.”
They do, of sorts. There’s probably an optical target for color and focus checks that picks up dust and can be used for measuring that though it does “muddy” the original use. The solar panels make a great dust gauge with power output being largely a function of sun angle, distance, age, and dust. The first two are precisely known, the aging effects are well understood, and that leaves dust being directly measured.
The optics on Phoenix include a microscope, I wouldn’t be surprised if they use it to image dust grains that settle on the lander. NASA has some good documents describing the mission, I haven’t had a chance to read them closely.
I cheered on Sunday night when the probe landed safely. Thanks for posting this. I hope to live long enough to see people walking on Mars.
I’m such a geek.
Weather rock provides proof that SUV’s are causing global warming on Mars.
All I could think about was OMG WTF LOL
That’s the best thing NASA’s got?
A weather rock?!?!?!?!?!?!?!?
Seriously, with all the progress in science, a weather rock?
A weather rock on Mars. Now that’s funny stuff!
Perhaps the next mission can drop off a sundial and a wind sock.
OMG :::gigglefits:::
Nasa sent a Weather Rock to Mars!
Too funny.
Remind me why we pay these guys the big bucks?
Weather Rock on Earth – Prices range from free -> $9.99
Nasa Weather Rock – $11.26 million
The laugh you get when realizing Nasa just put a weather rock on mars – Priceless
I wonder if anyone ever told them it was a joke?
Namaste,
Lina
19thkiller/pohlse/alinaphoenix:
Perhaps you might want to explain to NASA how to make a better wind measurement device. But remember it must:
1. be simple
2. be very light
3. work below -100 degrees centigrade
4. require no electrical power
5. require no lubrication
6. work at an atmospheric pressure of 8 mb
7. be insensitive to dust
8. survive >9 g and extreme vibration levels
9. survive about a year in vacuum
10. work for at least 6 months without maintenance or calibration
Lots of luck, guys!
REPLY: I think the big distinction here is the realization now that the “Telltale” wasn’t intended for a meteorological instrument as its primary function. The primary function was to enable the camera to snap a photo, so they could see the wind across the lander, so that they’d know if the robotic arm might likely have soil blown out of the scoop or not while the soil payload was enroute to the inlet chute. If the soil got blown onto the top of the lander, it could clog/disrupt some of it’s systems.
saskboy/Ric Werme:
There is another form of “dust gauge” that has been used by the MER rovers. They photograph the Sun every day, and by measuring the brightness of the solar disc one gets a direct measurement of the optical depth (tau) of the atmosphere and thereby of the amount of dust in it. This is a very important parameter in Martian meteorology which has a strong effect on both thw temperature and the height(!) of the atmosphere.
As long as michael Fish doesn’t read the weather data I think the martians will be just fine 🙂
Beyond the weather rock, Phoenix does have a Canadian weather station. A little pricey at $37,000,000, but if a mass market ever develops the price will come down dramatically. I wonder if it came with a 90 day warranty?
http://canadianpress.google.com/article/ALeqM5hRLbX9aY2zFmsynoKE3AJijefD2w
Hey, at least they appreciate clouds. That’s more than I can say about some climatologists!
Once again, the plasma stream hitting all planets in our solar system appears to be ignored, not only on Mars, but here on Earth. I am shocked by how many cosmic ray instruments are no longer active. See:
http://spidr.ngdc.noaa.gov/spidr/index.jsp
If cosmic rays (referred to as plasma, which are in simple terms atom particles and pieces) have been shown to be somehow involved in cloud formation, it would seem logical to actively and continuously measure these particles. Now would be the time and place to do exactly that, given that our magnetic field is down.
Maybe meteorologists and climatologists just aren’t interested in chemistry.
Great weather update from Mars and the Phoenix weather station, Anthony. Going to be difficult to survey, though.
8.5 millibars! And Venus at 95 bar. This really is prime realestate, I’m sure we’d all agree, for a blessed moment in reflection. Ah, well, glad thats over.
It appears that many other planets have undergone recent climate change. We know that Mars has experienced a change as shown by its icecaps. Jupiter has also undergone a recent change (believed to be warmer at the equator, colder at the poles). Most theorists have separate explanations for each one, given that each one has its own set of gas cloud chemicals, wind, gravity, etc, in the environment. However, given that very set up, what are the odds that each and everyone has gotten warmer in concert with one another in the last few decades? If they also get colder in the next couple (or more?) decades, it would seem the odds would stack against coincidence and be more in favor of a single source for all planets.
Pamela Gray wrote “what are the odds that each and everyone [planet] has gotten warmer in concert with one another in the last few decades?”
Answer: There is nothing to explain. The all-planets correlation is a myth. We have very little knowledge of the global temperatures of any planets, moons, and other solar system bodies even in the short term, let alone the years that would be required to establish such a correlation. For those we know something about, not all are warming. The “all of Jupiter is warming” myth started from the news that some local areas of Jupiter were warming, resulting in or caused by local storms. Ignored by the mythmakers was the fact that other local areas of Jupiter were cooling. News of Triton warming was selectively repeated by omitting the attendant fact that Triton (with Neptune) was in an unusually intense Summer. Summer lasts a long time there, because Triton (with Neptune) takes 165 Earth years to go around the Sun. So we have to wait a really long time to see if Triton is warming overall–averaged across seasons.
Links to sources, and more details, can be found here, among other places: http://www.badastronomy.com/bablog/2007/04/29/is-global-warming-solar-induced/
Clarification of my previous post: The reason Summer on Triton is unusually intense recently, is that Triton lies somewhat on its side. At one point in Neptune’s orbit around the Sun, Triton’s south pole points almost directly at the Sun and therefore its ice evaporates a lot, which reduces the pole’s reflectance of sunlight, which causes the land to absorb more sunlight, and increases the atmospheric retention of heat, all of which increases the land and atmospheric temperature for the whole globe. At the opposite point in Neptune’s 165-year orbit around the Sun, Triton’s north pole goes through the same thing so the whole globe warms again. In between those two points in Neptune’s orbit, both of Triton’s poles point perpendicular to the Sun, so the polar ice caps are fairly protected, so they accumulate more ice, reflect more sunlight, the atmosphere thins, and the globe cools.
Uhm… wow. Budget cuts?
It’s still a big achievement, no matter what the cost was. But, it makes one ask is this the where our taxes go?
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