Recent comments in /f/dataisbeautiful

ferrel_hadley t1_j9xqi9r wrote

>s balloons would be reflecting solar IR

Solar IR is a small part of the downwelling solar spectrum.

https://cdn.shopify.com/s/files/1/0823/0287/files/atmospheric-absorption_848x452.png?v=1670339790

And the near infrared is heavily absorbed and emitted by CO2 and H20 so in those wavelengths that would be the ambient IR. The whole sky will look like it is those wavelengths.

You would also have to account for the upwelling radiation (very very very roughly shown here in Khiel and Trenberth 97 https://chriscolose.wordpress.com/2008/12/10/an-update-to-kiehl-and-trenberth-1997/ )

These wavelengths have always been a huge problem for IR.

Operating in these wavelengths is "the endorsement of the air force you think it is!"

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ferrel_hadley t1_j9xpx15 wrote

>1 out of 2 hit rate for half million dollar seeking missiles versus a balloon

A heat seeking missile hitting an object that would be only a few degrees above ambient air temperatures.

>What a joke

Who is laughing. The worlds second largest military and the US defined pacing threat thought their balloons were near undetectable and untouchable. Here the US pilots are taking pictures of these balloons from above.

https://www.thedrive.com/the-war-zone/our-best-look-yet-at-the-chinese-spy-balloons-massive-payload

The US then had to look at and bring down some random sky trash just to be sure there were not other spy assets using the flight profile of abandoned balloons. It looked silly but again they showed capabilities that surprised some pretty seasoned observers.

The incident will be forgotten in a few weeks. China's "super secret" years long spying on various countries by balloons that were unreachable has now been retired.

http://www.hisutton.com/Chinese-Navy-High-Altitude-Spy-Balloons.html

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Hattix t1_j9xpq36 wrote

This is the AIM-9X which uses an imaging infrared focal plane array and compatibility with JHMCS equipped helmets. They can lock on to balloons, as balloons would be reflecting solar IR and, besides, the sensor is an imaging sensor not a hotspot detector.

Even if it was an older AIM-9J or even older, with the passive IR sensor you're thinking of, saying "Yeah but they didn't use the right missile" isn't the endorsement of the air force you think it is!

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Havoc098 t1_j9xnqev wrote

I genuinely feel so sorry for Mexico. The world's biggest companies are looking to move manufacturing out of China and Mexico is right fucking there. It has so much going for it as the next hub of manufacturing but it won't happen due to the cartels/political system.

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