1
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I think it is pretty rustic.

2
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If there’s a more

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rustic facility,

4
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I don’t know of it.

5
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Welcome.

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We are in Area 300,

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where we have all our

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magnetic testing facilities.

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This is a 22-foot coil system,

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and this is what we’re

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going to talk about today,

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and how we’ve been

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using this over decades

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to develop magnetometry.

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A magnetometer is a device,

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the ones that we build

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are vector magnetometers,

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and they measure

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the amplitude

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and the direction

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of the magnetic field

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in a very precise way.

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Whenever we want

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to evaluate our

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magnetometer,

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we need to know

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what the magnetometer

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is seeing versus

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what is the field around it

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so that we can make

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kind of those corrections.

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So one of the ways we do

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that is by having the system

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of reference magnetometers.

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We have a zero-field

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magnetometer.

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So that one’s

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going to give us the direction

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and the amplitude,

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and that one we actually

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use to make sure

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that we can zero out

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the field here.

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This particular coil system

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was built in 1965.

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After this facility was built,

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they had some things

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that they learned

49
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from this facility,

50
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and they applied it

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to building one

52
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that’s twice

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the size of this coil system,

54
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twice the size of this.

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And one of the things that

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they used that for

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was magnetic

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characterization

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of the Apollo rover.

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So distance really

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is your friend

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when it comes to

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keeping the magnetometer

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clean.

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And that even happens

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on the spacecraft

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where we have

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magnetometers

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on the end of a boom

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to get it away from

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the spacecraft,

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which gives us the signature.

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Our magnetometers

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from our lab

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have gone to every

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planet in the solar system.

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To measure the magnetic moments

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of spacecraft

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back in the early space age,

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when spacecraft were small.

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Else.

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So.

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And that includes, you know, houses,

84
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cars, everything.

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And they bring the spacecraft

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into the building,

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and they would use the crane

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to bring it up.

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And there was a,

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tiny little railroad track here,

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and they would slide the spacecraft

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in on a turntable

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and spin it around in the facility

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and use magnetometers

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to measure

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the magnetic characteristics

97
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of the spacecraft.

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Today is spacecraft are much larger

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and too big to fit in the facility.

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We've repurposed it,

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and it mostly does

102
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only magnetometer calibration right now.

103
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And the facility is absolutely perfect

104
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for doing that.

105
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And it's really the only facility

106
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like this in the country.

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Here, here at area 300 of Goddard.

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So,

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we

110
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so we wanted a history.

111
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So,

112
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so I don't know what,

113
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about the alignment, like, there,

114
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like mirrors out there

115
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and things like that.

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Here we are at area 300,

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00:04:01,500 --> 00:04:02,766
the Goddard Space

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Flight Center magnetic test facility.

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And we're here in the 20ft coil system

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that we use here at NASA Goddard

121
00:04:08,733 --> 00:04:10,066
for precise calibration

122
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of our flux gate magnetometers.

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Everything in this building

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is is non-magnetic.

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So everything here

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is made of aluminum,

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aluminum wiring them frames.

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We have in the crane here

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you can see an aluminum hook.

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Everything up there is made of wood

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or phenolic and it's all non-magnetic.

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So we have brass screws, aluminum screws.

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But the building

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is is designed

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to have no magnetic interference,

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nothing that would,

137
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you know,

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be a flux concentrator

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and change the fields

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science.

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And so we

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have magnetometers

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all over the solar system

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that are making a fundamental measurement

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as we as

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we track the power

147
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as it comes out of the sun

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and interacts with planetary bodies.

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Yeah.

150
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I mean, they managed to build

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something that stayed

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nearly perfect orthogonal for 60 years.