Synthetic Aperture Radar: Of Bats and Flying Pianos
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- Опубліковано 6 вер 2024
- An amusing introduction to radar remote sensing from satellites, with the concept of "range Doppler" image formation described using entertaining audio-video animations. The video finishes with a tongue-in-cheek "demonstration" of one satellite's ability to locate points on the ground. Animations were created mainly by Adrian Schubert, except satellite+Earth backgrounds thanks to the German Aerospace Center (DLR). Oblique-view Earth animations made using Google Earth. Video effects and other animations made using Adobe After Effects, Photoshop and Premiere. See end credits for complete list of references to the media clips used.
This is a masterpiece!!! Thank you for your time and effort of making this
+Asad Abbas Thank you!
my god, this is some serious dedication. Thx, came to learn and left with a good laugh and lot of new knowledge.
This was not only the most helpful explanation of this topic, but thoroughly entertaining. Outstanding effort and truly motivating!!
Listen. I`m an young engineer from Ukraine during a war. Even through. Learning with such tutorial is awesome. Funny and with kinda deep nuances. Thanks))
You're welcome! And I sure hope your country doesn't have to suffer much longer...
i had so much fun watching this ..loved it
this is how science communication should be presented!! amazing work
Thanks a lot! If only I had more time for these projects...
By far the best video I saw in a long time
Very informative and easy to understand. Thanks so much! I'm doing a report on the SAR carried by ERS-2, and this helps put things in perspective.
I'm an electronics engineering student and i am amazed by your telling. Even this video 10 years ago it stil helping so many people like me. Thank you for the outstanding work.
I am in awe how you were able to explain SAR imaging in a manner which so many can understand. Thank you Adrian!
This is fucking genius!
+Stian Sætervik Glad you like it!
best explanation found on youtube ❤
Amazing video
Clear and simple explanation. Thank you for your labors. Much appreciated.
Creative genius! Best video I could find by a mile. And made me laugh!
the is the best I've ever seen about SAR
Thanks!
beautiful
Brilliant! Thanks; had a hard time understanding SAR until you explained it!
this is the most trippy but at the same time informative video I have ever seen
Good job.
A gem among the video. great work
This is so awesome ngl I’m only gonna subscribe for the sheer effort done in this video!! This is really well done and well though out! I love this video so much
Very good educational video. You should do more of them.
I am out of words ...... It's the best scientific video I have seen in my life. Fantastic, Superb, Amazing, and many thanks for your hard work.
Thanks, that's really nice! Not true of course, but I appreciate the comment : )
omg, I am very grateful to be able to watch this. This is incredible and very fascinating
I am amazed by your creation. Thank you Mr. Adrian.
Amazing work. Best video for class!
Just saw this comment...thanks, glad you like it (even though it's 10 years old by now)! I grew up in Edmonton BTW....just saw you were in Calgary.
VERY COOL
Thank you very much.Perfect and clear explanations!
Awesome, this was an amazing iillustration. Thank you Adrian
You r a legend.......Thank u......
Thanks, it made it easy for me to understand radar remote sensing in an easy way !
what are the limitations of SAR? Is there any altitude restrictions for such resolution (8 inches you told!)? Can you please tell me the satellites that are using SAR?
Those are not simple questions, except for the last (the "coolest" and most current radar satellites currently in space are Sentinel-1 - free data! - TerraSAR-X (super accurate, high resolution), and others from Italy, Canada...the list goes on). For a more complete tutorial on radar remote sensing:www2.geog.ucl.ac.uk/~mdisney/teaching/PPRS/PPRS_7/esa_sar_tutorial.pdf
For what it's worth: the 8 centimeter (not inches) "resolution" you refer to isn't actually resolution - it's the location accuracy of the pixels. "Resolution" is related to the size of the pixel itself, "location accuracy" refers to how precisely those pixels are positioned on a map background.
Thanks for the interest!
Very nice video.
Thank you so much.
I really wish that this was vocally narrated.! The pace turned me off a lot as I like to just listen to things and the extra required focus made me not want to watch. You must be doing something right though, as it was one of the first videos that popped up when I searched for videos on it. Just giving constructive criticism. I was having a discussion with my physics professor about this topic and somehow he had not heard of it yet being a phd in physics! I was making the analogy that the VLA in new mexico is a "static" synthetic aperture for sensing radio waves. Then talking about the "dynamic" SAR concepts of pinging the ground with EMR and keeping track of the time difference between pings to create the synthetically larger aperture. Thanks for making the video I will watch it again when I have time to digest the reading and funky font ;)
Just truly amazing. Thank You.
Welcome!
Very clear and educative video, thanks !
Great video, thanks for the explanation
This was outstanding.
You are a genius do you know that?
Beautiful !
Thanks!
Great Video ! really helped me understand basics of radar imagery
Great video!
really cool. this was fun
Amazing video!!
But I cannot understand the pitch (of the train) corresponds to which quantity/ characteristic in radar imaging... (?!)
The change in pitch of the train demonstrates the Doppler effect. The same type of "pitch change" information is useful in radar imaging to figure out which direction the echo came from (relative to the satellite orbital path): more ahead or more behind the radar? In the same way, we can tell the direction of an ambulance/police car siren that's passing us from left to right, just by noticing if the pitch is too high (coming towards us on the left side), too low (moving away on the right side) or just right (straight in front of us). What a radar actually does is to "record" the pitch changes while a particular target returning echos (i.e. the "siren sound") is moving through the radar beam, and afterwards it compares this "recording" to a "template" (a model of the pitch change) to figure out exactly which direction the target was; in other words, it doesn't only look for the moment that they're passing each other (no pitch change), but uses the whole series of pitch changes (more information = more accurate knowledge of the position). Meanwhile, the distance to the same target is known already thanks to the "musical" pulses that were sent out (and the time for the echo to come back tells us how far away it was). So we can figure out where the echo came from: we know it's distance and direction.
Thank you! Very helpful.
Masterpiece !!absolutely
this is fucking great!
What a great video. Explained in such simplicity is indeed a masterpiece. SAR and Classical music. Thank you so much!
May I ask Adrian, is it true that latest SAR technologies are able to penetrate ground, see through?
Really enjoyed it, keep up the good work man
Great video. Tnx
So what is synthetic aperture radar?
This is amazing ! ! ! !
Thanks!!
Hi Adrian, I'm making a video on the Indian Risat2 br1 satellite launch and I'd like to use about 1.5seconds of this video to indicate the radar. Would you be ok with me using it... More than happy to give you full credit for it and send people here to watch the video in full. Thanks
Hi Gwen, it's been awhile since I put this video online...the German Space Agency (DLR) originally gave me permission to the use the satellite animations as a background for my animation (I added some layers to them) for educational purposes. If I were you, I would use the 1.5s but give credit to DLR for creating the satellite animations. My contributions were the bat, the flying echoes...all the "non-standard" stuff on top of the flying satellite. You can actually visit DLR's web site and find more animations...maybe they even have an official policy for use of their materials. I have no time to look myself right now, but I thought I'd mention it...
@@yobabyyo Thanks Adrian. I didn't know how long before you'd get back to me because the video was 4 months old and it was a while since you uploaded before that. It actually ended up being less than 1.5 secs, I think it's about 0.8. I used the radar with the blue disks coming out of it. I looked at your credits and went on the DLR site and it was a bit confusing and I couldn't find any of the animations. I don't make any money from my channel so if they want to claim it, that's fine. And if you want to claim it that's fine too seeing as I used the piece before getting permission but I have credited you in the video and linked your SAR video in the end screen. Have a look if you like. I'm still fairly new at all this UA-cam stuff so my video isn't of the highest quality but they're improving. Thanks so much for getting back to me.
watch it at 1.25x or 1.5x
Good point : )
Just one question. If William Tell is just a legend then how there was his son? :D
great thanks
this is amazing!!
Happy you like it! Freut mich...
haha i like this one, this video helped me a lot, thx!
How high were you when you made this, lol!
Is the Spongebob Squarepants font really necessary?
Sorry ; ) Nobody's perfect!
You are a weird guy Adrian. But this video is incredible. Keep it up!
MOOOOAARRRRR!!!
>>----------------> Let's use a font that is totally illegible and detracts away from the actual message being shown.
I think illegible is pushing it...! But yeah, it's true that I'd choose another font the next time.
Heheh, I get the point...but the video is pretty darn old by now and I'm sure as heck not going to go back and change it! Next time I'll use Times ; )
While it might be somewhat distracting, I find it completely appropriate for the tone of the video.
Taşkın Hocadan gelenler +1
Anyone else here from INTL 304?
and i thought comic sans is the worst font.
Always aim to please ; )
gay editing, need a human voice speaking
Just narrate the video dude. It's dead boring without voiceover.