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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/XAK46F5QMB3LRNOGYT6IPDEFFWXCD65Q/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "XAK46F5QMB3LRNOGYT6IPDEFFWXCD65Q",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/HLDEVYCTOPGPBDAXO6KJ5XLLN5VTUTAF/?format=api",
    "sender": {
        "address": "antonio (a) qti.qualcomm.com",
        "mailman_id": "f829a3b1e03f4d1faaa86c1eed3cea77",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/f829a3b1e03f4d1faaa86c1eed3cea77/emails/?format=api"
    },
    "sender_name": "Franklin Antonio",
    "subject": "[amsat-bb] Re: Malaysian airliner puzzle",
    "date": "2014-03-18T01:08:44Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/35TEQ5BSGZNL45PUAVAPSHJ5T72SNFPY/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5CPSWQPRZ6RLQ6A5D7Z3MFJFCEKNYZCF/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "At 12:40 PM 3/17/2014, Bruce wrote:\n>i am sure that the u.s. as well as other countries have spy \n>satellites that have been taking pictures 24/7 with resolution that \n>can see a person on the ground. that being said, i would further \n>venture to say that none of them will want to show pictures of the \n>jet as it would give away their secret ability.\n\nHey, good to see a post that's on topic.  Satellites!\n\nActually, the capability is not very secret.  Its pretty much out in \nthe open.  Although every nation keeps the details secret, but you \ndon't need details to understand what kind of a picture is \npossible.  Physics will tell you that.\n\nYou can calculate the resolution of a spy satellite.  Its just \nphysics.  You know the diameter of the aperture (lens or \nmirror).  You know that because dimensions for many classified \nobjects have been published.  Also you know the diameter of the space \nshuttle's payload bay.  You know the wavelength of light.  Simple \nformula gives you the resolving power as an angle.  To turn that into \nthe size of an object you need to know a distance.  You can look up \nthe orbits of many classified satellites, so know how far away they \nare.  But because you get more resolution by being closer, you know \nthe best pictures will come from low orbit, and here the limit is the \nEarth's atmosphere.  No need to know classified orbit data.  Just \npresume there are some spy satellites in low but stable orbits, \nperhaps 300 to 500 km.\n\nSo, yes, they should be able to see something smaller than a person, \nbut here's the kicker... They can't do that everywhere at \nonce.  Because they are in orbit close to the earth, they can only \nsee stuff that's under them.  This is a tiny fraction of the \nearth.  Also, within that area, you have to tell them where to \npoint.  A simple number-of-pixels thing.  Looking at the whole \nfootprint at max resolution would be an enormous # of pixels.  We \nwould have to guess the limit, but its not hard to guess that the \nmaximum image is way smaller than the footprint.  This is great for \ntaking pictures of your opponent's military installations, and maybe \neven seeing what assets there come and go over time, but it is \nunlikely to be of help in tracking an airplane that unexpectedly \nflies some unknown path to some unknown location.\n\nAlso, the plane flew at night, in the dark.\n\nI'm sure the big boys are thinking about new capabilities as we \nspeak, and writing them into next year's budget!\n\n\n",
    "attachments": []
}