<p>That is <a href="http://winds.jpl.nasa.gov/missions/RapidScat/" rel="nofollow noreferrer">RapidScat</a>, described in <a href="https://space.stackexchange.com/a/8742/12102">this answer</a> in the Space Exploration SE.</p>

<p><a href="https://i.sstatic.net/cdkOW.gif" rel="nofollow noreferrer"><img src="https://i.sstatic.net/cdkOW.gif" alt="enter image description here"></a></p>

CC BY-SA 3.0
2018-01-23T12:10:24.243Z
2018-01-23T12:10:24.243Z
uhoh
<p>And why is it moving? Doesn't make very much sense to me, a moving antenna. Or is it kind of radar that is checking  for dangerous objects? These are screen shots from this <a href="https://www.youtube.com/watch?v=RtU_mdL2vBM" rel="nofollow noreferrer">YouTube video</a>.</p>

<p><a href="https://i.sstatic.net/SDkhb.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/SDkhb.png" alt="enter image description here"></a></p>

<p><a href="https://i.sstatic.net/uJc4F.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/uJc4F.png" alt="enter image description here"></a></p>

CC BY-SA 3.0
2018-01-21T21:58:55.103Z
How do you see it's moving?
AtmosphericPrisonEscape
CC BY-SA 3.0
2018-01-21T22:17:52.580Z
I took the screenshots, its from https://www.youtube.com/watch?v=RtU_mdL2vBM
Luky
CC BY-SA 3.0
2018-01-21T23:50:00.207Z
Ah, I see now. Well, the angle under which the antenna is rotating clearly forms a cone over the earths surface, so it must be some kind of communication anntenna.
AtmosphericPrisonEscape
CC BY-SA 3.0
2018-01-22T06:09:03.710Z
This question is a better fit for space exploration
James K
CC BY-SA 3.0
2018-01-22T10:56:05.223Z
I'm voting to close this question as off-topic because this should be asked on https://space.stackexchange.com/
J. Chomel
CC BY-SA 3.0
2018-01-23T12:08:09.927Z
@J.Chomel Better asked or should be asked on another site is not a Stack Exchange reason for closing. Off topic, because the question is *simply not about Astronomy* is however a very good reason!
uhoh
CC BY-SA 3.0
2018-01-23T14:04:38.007Z
@uhoh, sorry, then it could be migrated? I am not familiar with the process behind this. I will think twice next time when I propose to close something.
J. Chomel
CC BY-SA 3.0
2018-01-24T02:58:00.190Z
@J.Chomel oh no need to be sorry. SE sites often have some overlap, there aren't always well defined borders of on-topic-ness. In those cases it's generally up to the OP to decide if they'd like to move the question manually (copy paste text then delete in old location). In that case a helpful comment suggesting to the OP to move where they are more likely to get an answer usually comes first. Sometimes a moderator will decide to migrate also. But as users, we should vote to close for the standard reasons. In this case, I think simply the off-topic-ness reason is correct; not about Astronomy.
uhoh
<iss>
What is this antenna on the ISS?
Luky
# What is this antenna on the ISS?

(Asked by: username_0 on 2018-01-21)

And why is it moving? Doesn't make very much sense to me, a moving antenna. Or is it kind of radar that is checking for dangerous objects? These are screen shots from this [YouTube video](https://www.youtube.com/watch?v=RtU_mdL2vBM).

[![enter image description here](https://i.sstatic.net/SDkhb.png)](https://i.sstatic.net/SDkhb.png)

[![enter image description here](https://i.sstatic.net/uJc4F.png)](https://i.sstatic.net/uJc4F.png)

**Tags:** iss
> **Comments:**
> **username_1**: How do you see it's moving?  
> **username_0**: I took the screenshots, its from https://www.youtube.com/watch?v=RtU_mdL2vBM  
> **username_1**: Ah, I see now. Well, the angle under which the antenna is rotating clearly forms a cone over the earths surface, so it must be some kind of communication anntenna.  
> **username_2**: This question is a better fit for space exploration  
> **username_3**: I'm voting to close this question as off-topic because this should be asked on https://space.stackexchange.com/  
> **username_4**: @J.Chomel Better asked or should be asked on another site is not a Stack Exchange reason for closing. Off topic, because the question is *simply not about Astronomy* is however a very good reason!  
> **username_3**: @uhoh, sorry, then it could be migrated? I am not familiar with the process behind this. I will think twice next time when I propose to close something.  
> **username_4**: @J.Chomel oh no need to be sorry. SE sites often have some overlap, there aren't always well defined borders of on-topic-ness. In those cases it's generally up to the OP to decide if they'd like to move the question manually (copy paste text then delete in old location). In that case a helpful comment suggesting to the OP to move where they are more likely to get an answer usually comes first. Sometimes a moderator will decide to migrate also. But as users, we should vote to close for the standard reasons. In this case, I think simply the off-topic-ness reason is correct; not about Astronomy.  

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## 1 answers

### Answer by username_4 on 2018-01-23. Score: 1

That is [RapidScat](http://winds.jpl.nasa.gov/missions/RapidScat/), described in [this answer](https://space.stackexchange.com/a/8742/12102) in the Space Exploration SE.

[![enter image description here](https://i.sstatic.net/cdkOW.gif)](https://i.sstatic.net/cdkOW.gif)


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