I Couldn't Find a Video Explaining Satellite Images, So I Made One

Подписаться 1,2 тыс.

Просмотров 56 тыс.

50% 1

What can satellites see? What can't they see?
Get your satellite imagery at www.skyfi.com
-- Find Me --
Support my work on Patreon: / mindsbehindmaps
Find me on Twitter: / maxlenormand
Listen to conversations with experts in mapping & satellite images: / @mindsbehindmaps
-- Sources --
- Interview with Ian Woodhouse on Synthetic Aperture Radar: • Understanding Radar Sa...
- Interview with Jeffrey Lewis on Open Source Intelligence: • Jeffrey Lewis: The Wor...
- Landsat time-series animation by Niels Stevens: nielssteven/statu...
- When the Clouds Par with the Daily Satellite Imagery: / when-the-clouds-part-w...
- Images & Data used to recreate the Earth in Blender from NASA: visibleearth.nasa.gov/image-u...
- ESA's Sentinel for Copernicus: • Sentinels for Copernicus
- Landsat 8 Swatch animation: • Landsat 8 Swath Animation
- Landsat Data Continuity Mission: The Long Swath: • Landsat Data Continuit...
- Landsat Next Defined: • Landsat Next Defined
- ICEYE: Beyond Change Detection: Measuring the changes that matter: www.iceye.com/blog/beyond-cha...
- World War I maps from the National Archives of the United States
-- Music --
Thank you to the amazing Peter Xiong for making the music in the first 35s.
On Twitter: / cellobuddy
Find more of his work: symphoniclandscapes.squarespa...
The rest of the music in this episode is from Epidemic Sound
Timestamps:
00:00 - Introduction
03:07 - 1. Going to Space
06:36 - 2. Resolution
09:20 - 3. Clouds
12:59 - 4. Timing
14:36 - 5. Stories
16:55 - 6. Looking Ahead
No Landsat Satellites were harmed in the making of this video.

Наука

Опубликовано:

11 июл 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 190

@skywatcher2025 10 месяцев назад

I'm the team lead for an undergrad CubeSat project that is effectively trying to replicate some of the functionality of the Landsat-8 mission. The amount of points in this video that are applicable has been staggering, and I very well might use this during the onboarding process for new team members.

@MaxLenormand 10 месяцев назад

A few corrections pointed out by viewers: - At 08:40 Landsat pixels are 30m on the ground, not 30cm - At 11:26 I mention polarisation although I go on to showcase is interferometry, which uses the phase of the image. I should have said phase instead of polarisation

@ericfielding2540 10 месяцев назад

Great video about satellite imagery. I am glad you started with Landsat. The 50 years of Landsat is an important background for the whole satellite image industry. I first started looking at Landsat in college. The first civilian synthetic aperture radar satellite, called Seasat, was launched by NASA in 1978, but it only lasted about 3 months and did not cover the whole Earth like Landsat. NASA is only going to have a new synthetic aperture radar satellite in orbit starting in 2024 with NISAR.

@MaxLenormand 10 месяцев назад

SAR would merit it's whole entire video, the history -and applications- behind it are also really interesting!

@_das_19 10 месяцев назад

Man, you did justice to the topic, information, maps and explanation. 🎉

@ripHalo0002 10 месяцев назад

Thanks for making this, my college geography dept's budget cuts are so deep we do not have an arial photo interpretation class anymore 😅

@henryosei6151 9 месяцев назад

Concepts of remote sensing can sometimes be complex, but you summarized it so well and was so coherent. Loved it, keep it up.

@engineeredarmy1152 10 месяцев назад

I thought yeah whatever just another new RU-vid channel and started noticing your editing skills, but then got lost in your story and stuck for the entire video unmoved. What a start to the channel! Congratulations 🎉

@freedomtowander 10 месяцев назад

Your videos are a little added side tangent but still incredibly focused! I love how you slip little details in like trumps tweet! It keeps my mind focused with adhd! Great job!

@firenbrimstoneangel 9 месяцев назад

😂😂😂

@40watt53 10 месяцев назад

God I keep finding incredibly made videos with people under 1000 subscribers, this ain't even a SoME3. Keep it up man!

@Arthur_da_dog 9 месяцев назад

Wait what the hell. How do you only have 680 subs? I genuinely expected to see anywhere between 50k to 350k subs. Well this is my mark, saying I was here when you were at 680 subs. Can't wait to see you get half a million subs my guy! Keep up this AMAZING work.

@MaxLenormand 9 месяцев назад

Ha, I wish! Glad you enjoyed the video! More coming... eventually!

@OliveDasi 10 месяцев назад

My GIS/Geography instructor linked us this video and I am so happy he did (even though we use freedom units). It's so well researched & presented in a way that's informative and entertaining. Plus I can always respect anyone who can clarify or correct anything via editing. If you have time or the ambition I truly hope you make more videos!

@MaxLenormand 10 месяцев назад

This made my day! I'm glad to read GIS professionals are recommending it! I do want to do more, it just might take a little while as these take some time to make but reading comments like these makes me want to do more!

@OliveDasi 10 месяцев назад

@@MaxLenormand I'm so glad! You absolutely deserve it. Take your time and I'll definitely be waiting (alongside many others) for your next video! I was honestly shocked it was your first with how well done it was!

@MaxLenormand 10 месяцев назад

@@OliveDasi Thank you! In fairness it’s not my first video ever, I’ve been hosting a podcast for a couple of years now and have learned a bunch about editing while doing so You might find some of the conversations interesting: youtube.com/@mindsbehindmaps

@skyfi-app 10 месяцев назад

This was a much-needed educational video to empower the masses with the knowledge to leverage satellite imagery. We love it!

@MaxLenormand 10 месяцев назад

Thank you to the team for helping make this video happen!

@lancesudberry209 10 месяцев назад

@@MaxLenormandif you like to see just how much / they sent up 2 largest sats sent up/ out Russ1 Us2 Just after " 4get7" can it just be 9ll ~ exact 1yr of this date also gave 3rd Ghina ( gross Annual monetary gain graph) last dead place that only since this day in time slowly leap frogged every other countries till reached#1. Russ put up 1st sets of mos. Bi mos till year Ann simultaneously removal sets back home those were was what Us pyt up untill they acquired most Both graph and more was gathered and made back in 2017 and the last name to the screen name is 'muse' inside 1 of my public channels and its hidden by the blm and " white supremacists" street brawl i think in NC another vid to look out for is Michelle Obama being explained by a examiner ( fem. ) good luck ! Have fun ! " if u dare 2" ❤

@callishutchings7644 10 месяцев назад

this was really good. For detail, we should remember the Hubble telescope was the first of it's size pointing to space. Two previous satellites of the same size pointed down before Hubble was launched. I talked with a retired military gentleman who worked in imagery. He said he saw a photo that showed the name of a golf ball from a satellite in 1971. I think military is much higher than they share.

@happyllama25 10 месяцев назад

Wow, you need more subscribers, this is a really great video essay/explanation

@NathanaelNewton 10 месяцев назад

How do you only have one video 😂 this is great!

@Teh-Penguin 10 месяцев назад

A channel with 200 subs and 1 video... with this quality. I hope you find more topics that no one has explained on YT yet :D

@semitangent 10 месяцев назад

Great video, though I am really surprised by how uncomfortable the "side note" jump cut to you looking down on me makes me, it is quite remarkable...

@MaxLenormand 10 месяцев назад

Fair enough! I just thought it was a cool shot to try to change things up a little bit

@aepokkvulpex 8 месяцев назад

@@MaxLenormandI like the idea, maybe just a different angle 😅

@s_shake 10 месяцев назад

Great video, I love being recommended underrated talent like you

@SubvertTheState 10 месяцев назад

Synthetic aperture radar has blown me away since i learned about it. Great video

@jachut 10 месяцев назад

Wow, very effortful video. It was fun to watch. I subscribed and am excited to see what else is coming! Keep up the good work!

@Renat9453 5 месяцев назад

Content and quality on a very high level! I was very surprised that you have only one video and less than a K subs. Continue your work! You have a very high potential and skills that will pay off!

@Oxxygen_io 10 месяцев назад

your 376 subscriber here. This is amazing production value. and short to the point on a topic. Keep it up and you will be huge

@harrystranger 10 месяцев назад

Epic work man, this will definitely get shared around when I need to explain our awesome industry to people. Cheers!

@hueyiroquois3839 10 месяцев назад

4:25 In the 1990s a similar quality image was accidentally released in a Congressional report, and 1960s era film based images were almost the same quality, so I think that's about the best any lens can do looking through the atmosphere.

@springbloom5940 9 месяцев назад

I was an imagery analyst through the 90s(US Army) and our imagery was a bit better than that. The second or third generation imaging(photo of a projection of a photo,) is likely to have significantly degraded it. More interesting than the optical resolution, is what can be gleaned from the imagery. In Desert Storm, we could tell whether a truck was carrying personnel or equipment, by the color of local vegetation. We spent hundreds of hours studying local botany, so that we could assess the soil composition and environmental conditions from color and distribution of vegetation. Thus, we could estimate the weight of a vehicle, by how it maneuvered off-road; and thus take a guess at what type of cargo was onboard. It should also be noted that military sat imagery is all viewed in stereo, so the apparent resolution is *much* higher. Like, stunningly higher. The cool factor of stereo satellite images can't be overstated.

@interlink.separate5188 10 месяцев назад

This topic is so niche and i’m so happy you’ve decided to study it and educate us all!

@Mixed_Pixels 10 месяцев назад

Hi Maxime, your video is an absolute gem! The animations are not only visually stunning, but also incredibly effective in simplifying such a complex topic. Good balance between captivating visuals and clear explanations. Can't wait to see more content like this! 🛰📡👏

@MaxLenormand 10 месяцев назад

Thanks a lot, I'm so glad to read that! If this project is anything to go by, it's probably going to be a few months before there's anything new, but I have many ideas and the response to this video is incredibly motivating to do more!

@TheHappinesspeace 10 месяцев назад

Very cool, informative and well edited. Good job buddy !

@MaxLenormand 10 месяцев назад

Thank you!

@PierreMarkuse 10 месяцев назад

Very well done introduction, answering many questions that repeatedly come up when people dive into the world of remote sensing.

@MaxLenormand 10 месяцев назад

Thanks Pierre! This is one of the main reasons I wanted to make this, to have something to point family & friends as well as people entering this world to

@ryanprasad2090 10 месяцев назад

Top notch stuff Maxime! Thanks for putting in the effort.

@MaxLenormand 10 месяцев назад

Thanks Ryan!

10 месяцев назад

I just can't imagine how increadible it has to feel when you are an astronaut on a space station and are able to see the earth from above for the first time. The single most beautiful thing ever known to humanity.

@Rubyranch393 10 месяцев назад

Fake new bro worlds a pancake

@joeshmoe7967 10 месяцев назад

@@Rubyranch393 Nope not a pancake. Definitely a rotating globe. SO easy to prove, but not to those of low intelligence....

@I_am_a_human_not_a_commodity 10 месяцев назад

This was a very cool topic to learn about! Thanks for the informative and educational video! :D

@warrior7038 10 месяцев назад

Wow you've got some talent with video production, keep it up, I'd definitely watch more!

@papesouleymanediop3006 10 месяцев назад

Great video ! This is definitely a good starting point for students/non practitioners willing to know more about satellite imageries

@fotodille 10 месяцев назад

HI! Awesome video! I like to think I'm quite technically informed in my area of interests, but this thing about details in satellite photos has always been a question of mine. Perfect first video for a new channel, if you ask me. Also very good storytelling.

@ryan.shields 10 месяцев назад

So well done man! Love the animations!

@MaxLenormand 10 месяцев назад

Thanks Ryan, appreciate it coming from you!

@MACE1-1 10 месяцев назад

I know of someone who in the early 1980's witnessed the United States reading the word Marlboro off of a cigarette via satellite...Let that sink in...

@daviddroescher 10 месяцев назад

Can probably extract fingerprints using different waveforms off the Marlboro with 40yr of advancement . I mean they claim to barely see the cigarette today ,much less the print on it with sub mm resolution.

@MACE1-1 10 месяцев назад

@@daviddroescher - lasers are being used to monitor audio from space (geostationary satellites). They are also used to project audio...Look close at some windows on certain federal buildings. Notice anything different about them? This is not new technology...

@daviddroescher 10 месяцев назад

@MACE1-1 1970's tech eas droping with lasers. And any ground based spy tech is better from space.

@guillaumedorland9547 10 месяцев назад

Nice work, editing on point 👌

@lukustreloar7243 9 месяцев назад

That means the military can see us in our back yard ? Great show thanks.❤👍

@GlxyEntertainment 10 месяцев назад

Love your flow. You explain things well like a poem.

@bobroberts8500 10 месяцев назад

Sar, that's why the maps look funny at different zoom levels

@sensitiveissues3671 10 месяцев назад

Excellent, informative video. Good luck with your channel👍

@stuartgray5877 Месяц назад

My company built the Worldview 1 & 2 satellites for Digital Globe. I personally helped build the 2-Axis Gimbals for the High Gain Antennas so they could track ground stations even while imaging. We also likely developed GEO Imaging satellites that can image under 1 meter on the surface FROM GEO ORBIT! Ask any Optical Engineer today if this is possible, and they will likely say NO. Lookup the MOIRE Program from Ball Aerospace. (Membrane Optic Imager Real-Time Exploitation (MOIRE) telescope.) It was going to be the next greatest thing in space imaging tech. We built a tech demonstrator of the concept and proved it WOULD WORK. Then the entire program completely disappeared never to be heard from again. I WONDER WHY?

@stuartgray5877 Месяц назад

I also helped build the NPP-Suomi Spacecraft which took the images used in the famous "Blue Marble" composite image released by NASA (Bob Simmons) in about 2012. That full earth image was assembled by images from the VIIRS Instrument in LEO. I then helped build, launch, and commission its big Brother JPSS-1 (now NOAA-20). And regarding "imaging technology", I also helped build JWST, Kepler Space Telescope, IXPE Xray Telescope, and I am helping with the upcoming NEO-S mission. My company built the corrective optics for Hubble and now most of the instruments aboard Hubble were provided by us.

@CrimsonA1 10 месяцев назад

Thank you for piecing together this informative vid!

@johanv4668 10 месяцев назад

wow what a quality video. with just 476 subs. and low views. normaly this kind of quality channels have 1Mil+ subscribers. hope youtube will pick you up, so you can make more quality videos.

@libertyauto 9 месяцев назад

Regarding being able to notice millimeter differences; Since the U.S has treaties limiting the number of ICBMs, we have more launch sites, than we have missiles. So missiles are shuffled from one site to another to keep their exact location unknown. The trucks that move these missiles, have suspension systems that will lower the trucks to look like they have a heavy missile on board, when they are actually moving an empty shell. This fake "squatting" is done to fool the satellites that can notice the difference. The ultimate shell game.

@abramjessiah 8 месяцев назад

Love this video! Would love to work with you if you need map animations and other 3D visualisations.

@herzogsbuick 10 месяцев назад

this is your first video?? hell yes. subscribed.

@Xsiondu 10 месяцев назад

That pause at 11:52 needs to be pregnant. These systems can see that mm level change meters under the surface layer! But that's not creepy like having algorithms that can detect the nanometers delays in noise absorbed by the signal and discern audible conversations being held in passing jets. We can do some real magic with SAR.

@praudhaprayogi 8 месяцев назад

Amazing video!

@daviddroescher 10 месяцев назад

What resolution would you say Google is publishing? I was found swinging an ax at a stump. My arms are not small but definitely not 10cm, the ax 2.5"/60mm and both arms are discreet lines lacking details. I was mid swing when the SAT went click. More info was provided by the shadows than the object ( me) due to top down limit showing my hands over my head( +possible data scrub done to protect humans by increasing random pixels).

@Cyberpunk_Radio_PBS 7 месяцев назад

Who doesn't know the history of space travel and how we launch satellites? flat earthers?

@diemturner5755 10 месяцев назад

Great video man. I'm your 400th sub. 🙂

@gregkral4467 9 месяцев назад

Great video. This was vey interesting. Thanks.

@jayerjavec 9 месяцев назад

There are Geostationary satellites above us as well. The name suggests they are stationery above a certain location or area - sync orbit. Enter real time observations. Thanks for a great video.

@Pretender6 10 месяцев назад

The mod Scansat for the game Kerbal Space Program is the ideal toy for this

@MaxLenormand 10 месяцев назад

Do not tempt me back into KSP I have spent far too much time on it already

@mikepan1968 10 месяцев назад

Great Video, thanx for making this!!!!

@borthwey 4 месяца назад

I still couldn't find the info I was looking for. From what I saw a satellite takes at most two hours to circle the Earth. This means it covers 2,77 meters in 1/2000 of a second. So if that's the speed of the camera shutter, it's a 2,77 meters blur. Is there a motor on the camera to make it track the surface of the Earth, cancelling the satellite's speed, or is the shutter speed faster?

@MaxLenormand 4 месяца назад

That's a good question, I'm not quite sure! A quick search found this Quora question with someone mentioning Corona spy satellites would rotate to compensate: www.quora.com/How-does-satellite-imaging-work-If-satellites-are-moving-really-fast-how-do-they-take-photos-of-specific-places-without-any-motion-blur

@kiegal4499 10 месяцев назад

Good vid. Clear concise info .

@thiagof414 10 месяцев назад

Awesome! Thank you!

@joelcathey 9 месяцев назад

Definitely make more videos!

@wietsepruijmpie1922 10 месяцев назад

holy shit you're underrated

@TyrrRAP 10 месяцев назад

Insane !

@rizzlla 10 месяцев назад

Awesome quality vid keep it up

@Aengus42 10 месяцев назад

Who was that chap who said "First throw away your preconceptions!" or similar. I'd love to see one of his lectures/talks... I'll have to rewatch. Thanks for this taste of Synthetic Aperture Radar. You've piqued my interest! Could you describe it like the colours on a butterfly's wing? We can't see or hope to see the actual grooves that split the light, no matter how good our eyesight or the seeing conditions are. But we can infer the size of the grating the butterfly is using on a certain patch by observing the colour. Would that be a good analogy? Oh! Subscribed! Great video mate, well done. Sadly SkyFi (I've downloaded their app) have no imagery at all over me. Unless I'd like to instruct a satellite for thousands of £! ☹️

@MaxLenormand 10 месяцев назад

Thanks for watching and taking the time to write this! I don't really know how the wings of butterflies work to be honest so I don't think I could really comment on the analogy. Bats are often used as an example of animals that use echo location for navigation Sorry to hear that for the SkyFi data, which part of the world are you in? Coverage of archival data does depend on the areas, though should increase over time as more images get taken

@davidhorizon8401 9 месяцев назад

Excellent video!

@scytaleghola5969 10 месяцев назад

That was one of the best informational videos I have seen on RU-vid...*EVER* !

@MaxLenormand 10 месяцев назад

Thank you, that is very high praise!

@StuMas 10 месяцев назад

Interesting. We have high resolution images but at low frequencies in time. It won't be long...

@lwhack458 10 месяцев назад

Douglas Adam's secret to flying was to aim for the ground and miss.

@veronicalogotheti1162 3 месяца назад

Thank you

@fredbrown9519 10 месяцев назад

What change do you want ? I say let’s continue to make the earth more friendly for all people by helping everyone to get energy cheap

@dananorth895 10 месяцев назад

NASA also has an extensive image library/data sets availible from a vast number of diferent satelites.

@aepokkvulpex 8 месяцев назад

So Sentinel 2 satellite imagery maps if made 3D would be approximately a ½ scale Minecraft world, got it

@chrisdaldy-rowe4978 10 месяцев назад

I loved the video but also loved that you used your voice & not stupid robot voice

@johnsimun6533 10 месяцев назад

What was it, fitness trackers? That turned out to be able to track personal activity.

@johngreen4610 9 месяцев назад

I wish you had explained you had explained the relationship between the diameter of an objective lens and the maximum resolution of the system. The Dawes limit.

@Remigrator 10 месяцев назад

Best Minecraft channel I ever subscribed to.

@bimmjim 10 месяцев назад

For climate science, I use earthnulschool and similar data sources. I want to know why I can't get detailed data on surface methane concentration. .. I get high resolution data on many gasses; CO, CO2, SOx H2O etc. but not methane. We need the methane data very much. ..

@acamparargentina 10 месяцев назад

probabñy the best and most true-wise video i've seen on this topic

@LordBelakor 10 месяцев назад

great video

@victorherron2767 10 месяцев назад

Outstanding.

@artemirrlazaris7406 10 месяцев назад

So something in the back of my mind is a space, planet exploring localized sat. Like the syncing of images, you create a network that is in orbit but they all view towards mars, and then train and use aoftware to get the same milimetre changes from and earth orbit... its taking a macro picture of a flee from a mile away, its possible... space allows targeting that flee easiley.. in training one can improve optics and variable imaging and soon kust get milimetre images of all localized objects i the solar system from earth orbit. This then means satikittes for exlooration can then change to landing and returning exercises....

@markrindt8730 9 месяцев назад

So why isn't there satellite imagery of Maui's fire???????

@Jon6429 10 месяцев назад

If memory serves correct the now ancient KH-11 series satellites, grand daddy of the Hubble space telescope had optics with a focal length of over six feet. Smarter folk than me reckon this gave a resolution sufficient to read a front page newspaper headline, from low orbit 250 miles up. That of course was forty years ago so things may of improved a little Looks up, waves nervously

@larrybell726 10 месяцев назад

I can say that you are very close. My first job after college was working in the agency that used KH4 through KH 11 imagery. And yes, I also wonder what the best stuff looks like nowadays.

@piotrd.4850 10 месяцев назад

Oh, NRO - hi there. BTW: I assume that between KH-11 and Advanced KH-11 there were improvements and later is umbrella term for further developments...

@larrybell726 10 месяцев назад

@@piotrd.4850 The theoretical resolution, given perfect mirror quality and the operating altitude, has been reported to be 6cm (about 2.4 inches). Actual resolutions have always been classified, but probably KH-11 was close to that. I believe later modification involve faster frame rates, ability to quickly switch between oblique and vertical exposures, and payload weights. "Advanced KH-11" may have referred to what has been described as KH-12. The "fact of" image reconnaissance and many of the code names and program names were declassified in the early 1990's and the official use of the KH phrase and designator was dropped shortly after that.

@JohnHansknecht 10 месяцев назад

I saw images of Chernobyl during the disaster and could clearly make out the individual black and white panels on a soccer ball in one of the camps nearby where the firemen were being staged.

@8b25arjunarvind6 28 дней назад

Great

@--Valek-- 10 месяцев назад

Since when was thermal and infrared two different things

@ResortDog 10 месяцев назад

You know several new satellites are dedicated to watching the sun and measuring the increased effect it has on climate.

@MegaLokopo 10 месяцев назад

"No plane could ever fly through"? Clearly you haven't heard of skunkworks.

@nowherebrain 10 месяцев назад

"freedom units" lmao, I almost forgot about that nugget of propaganda....

@Aengus42 10 месяцев назад

Hardly freedom if it's only used within the borders of one country! Surely SI units are the freedom units seeing as the whole planet uses them!

@markwalker3499 10 месяцев назад

What can they see from space? Take the most advanced and the most high res photography that anyone will admit to then double the visual acuity of that and yo will still nit have the precision of what the military will be keeping secret for some time to come. But it is even more than that now because when you link these extreme imagers to AI they now can see crowds of people and cars driving along and identify persons looking straight down even though they can't see your face. Not only that but they can keep track of 100 different target persons and vehicles at a time. And that is not even really secret anymore or I would not know this. I would bet good money that the military can tell what brand of smokes you use when you pull the pack out to light one up.

@daviddroescher 10 месяцев назад

A commenter reported the Chernobyl (cr~1980 )images showed the word Marlboro on that cigarette they don't need to see the box unless they are looking for the copyright date in the fine print.

@periklisspanos7185 10 месяцев назад

But we never will be found the moon with those binoculars

@dong6839 10 месяцев назад

That moment when you realize the super smart guy doesn't know the difference between a Centimeter and a Kilometer. 😳

@Claytone-Records 10 месяцев назад

The problem might be simpler to resolve if the earth were flat, hmmm… 😬

@flyguy8791 10 месяцев назад

This was an awesome video! You really delivered a great overview on this topic. (see what I did there)

@artemirrlazaris7406 10 месяцев назад

Theres old canera training grounds in the deserts. Lol

@Amanda-cd6dm 10 месяцев назад

Yes but when you think about something falling into orbit think of a top spinning eventually that top is going to stop

@bexhill8777 9 месяцев назад

I dont warch stuff when comments are too much praise for" video" rather than topic.

@sebastiank1714 10 месяцев назад

Sorry to correct you - pretty sure you just misspoke misread your skript. A centimeter is a tenth of a meter and not a name for ten meters 8:40 you show the 30m square and narrate 30 centimeters and then the smaller is 10 meters. A 30cm (approx 12 inch) square would be inside a 10 meter square not around it. You do the same centimeter thing a bit later again. There I am not sure if is in error because you show pictures with a better resolution.

@MaxLenormand 10 месяцев назад

I did mis-speak there indeed, Landsat is 30m resolution, not 30cm So the visualisation is correct, but I got it wrong

@sebastiank1714 10 месяцев назад

@@MaxLenormand You still made a very informative video! You tried metric imperial verbal full spectrum information, that's a huge task, things can go wrong easy. Especially if the script has a 30cm resolution two lines further down.

@sebastiank1714 10 месяцев назад

I got it wrong, too. A cm is one hundredth of a meter a mm a thousandth not a tenth (what i wrote)' that would be a decimeter. A kilometer still is a thousand meter. 5280 feet in a mile.

@MaxLenormand 10 месяцев назад

@@sebastiank1714 Yep I got mixed up a bit too much there, but that’s a good learning for what to pay extra attention to next time :)

@Ben-wl3el 10 месяцев назад

"Freedom units"? WTF!? Like french Fries turnen to freedom Fries?

@nhansen197 10 месяцев назад

Allegedly, Soviet satellites were capable of reading the name tape on a uniform.

@larrybell726 10 месяцев назад

Probably not, I worked with KH 11 imagery in the 1980s and the best I ever saw there was a shipping label that said “fragile”in characters about 3 inches high . And I know our cameras were better than theirs.

@nhansen197 10 месяцев назад

@@larrybell726 When I was in the Air Force there was a rumor going around that an airman had flipped off a Soviet satellite - Naturally they wanted an apology and were dumb enough to provide photographic proof of the misdeed. Yes, it does sound rather preposterous but I wouldn't put it past the Soviets to launch a Hubble-type satellite and aim it at points of interest on the ground.