I hint about the only person around it doesn't have TV coverage of the things
that man got the black up now you're gonna be getting a TV picture now
they'll yes we are getting a TV picture
one all
magnetic fields have been a curiosity for thousands of years its own course we
know now the magnetic field generated by it was called dynamo action that
convective motion of electrically conducting flu
even though we can map the Earth's magnetic field with extraordinary
accuracy with satellites and learn about the earth
the one thing we can't do is see clearly through all the crustal magnetization is
right beneath our feet
Jupiter is a gaseous planet hydrogen helium there is no magnetize crust that
obscures our view of the Dynamo deep below so the exciting part about the
Jupiter mission is that will be able to image for the first time the magnetic
field on the Dynamo surface in a way that would never ever be possible
hundred Jupiter is also the planet with the largest magnetic field its
magnetosphere is HUGE if you were to look up into the night sky and if you
could see the outline of its magnetosphere which you can it would be
about the size of the moon in the sky it's a very very large media sphere in
fact in the Voyager program we learned that the magnetic tail part of the
megasphere that is drawn away from the Sun extends all the way out to the orbit
of Saturn and in all likelihood beyond it's a very large feature in our solar
system to pity we can't see it
junos the fastest spacecraft ever to venture into the outer solar system it's
the first two orbit poll poll about Jupiter and it's the most heavily
shielded spacecraft that we've ever like the mission is designed to basically rap
Jupiter in a dense net of observations completely covering the sphere so to do
that we need to pull over it when it passes over the North Pole long
and longitude and over the cell phone when we do this over thirty seven orbits
of the nominal mission and by the time we're done
we've got orbits separated and longitude by about every 12 degrees so we
completely cover the sphere magnetometer is it's best to think of it as a fancy
compass and like a compass that just record the direction of the magnetic
field our instrument tells you both what direction the field is in and what the
magnitude is and we can measure that very very accurately 200 parts per
million Jews magnetometer is another in a long line of magnetometers built here
at Goddard Space Flight Center following design developed by Mario cool years ago
our instrument is between one and two orders of magnitude more accurate than
anything that slowed Jupiter before and of course part of that is the result of
the star cameras that we're able to fly with our sensors so that we can
determine the absolute orientation in space of these sensors if we did not
know the orientation of the sensor as well as we can determine with the star
cameras we would lose accuracy in the vector measurement so we carry four star
cameras with r2 magnetometer sensors these have to be held in the same
orientation with respect to each other under very extreme environmental
conditions so we designed what we call the magnetometer optical bench
it's a special structure about $MONEY a square foot size that is made of a
carbon silicon carbide material almost impossible to machine but once it's
fabricated and the senses are assembled they act as one and that's one of the
reasons why we can achieve much higher accuracy than that
ever been attempted before we hope to learn more about how magnetic field
generated by dino action even planets interior for me the great excitement is
the opportunity to look down and get the first clear unobstructed view of what
the magnetic field looks like on the surface of a dynamo is generating it's
always incredible to be the first person in the world to see anything we stand to
be the first to be able to look down upon the dynamo and see it clearly for
the first time
and it doesn't have TV coverage of the things and it man you got the black up
now you're gonna feel better
different i haven't failed yet we are getting a TV picture
one
happy