1977, the first real time satellite imagery was acquired, 2013, ARGUS-IS,
NASA DailyPlanet layer shows the entire Earth at 6 – 12 hours old BUT with 250 meter across pixels or medeum resolution
geosynchronous Weather satellites orbit 36,000 k…
1977, the first real time satellite imagery was acquired, 2013, ARGUS-IS,
NASA DailyPlanet layer shows the entire Earth at 6 – 12 hours old BUT with 250 meter across pixels or medeum resolution
geosynchronous Weather satellites orbit 36,000 km above you record at 30 meter pixel low res all "day"
1 meter High resolution satellites orbit a few hundred kilometers above the Earth that cannot look at one spot all day
0.3 m resolution military analouge film based Reconnaissance satellites are used for specific events & require weeks to set up
a satilites Swath is the Amount of ground covered lengthwise in the passing of the satellite in its orbit, the time taken to circle the earth , (every 90 minutes?)
as strips of imagery , but its the interval of time that passes before the satellite scans the same point of the globe (every month?)
all of this must be Sun-synchronous orbit that always passes over the earth at the same local sun time at a high angle for fewer shadows
& add to this the need to toss out clouds haze , pollution & bad imagry at the assumed Resolution for the amount of ground covered in one pixel
(one meter resolution) = one square meter on the ground for each pixel ,
all higher resolution images you actualy see are taken from air planes under the cloud cover
any info available would point down & in a small space , a plane is to small to detect by satilite
in this time frame & all of that was stopped , as the attacks were understood to have happened
hundreds of cellphone cameras in a mosaic to video and
auto-track every moving object within a 36 square mile area
aint in orbit!
http://www.extremetech.com/wp-content/uploads/2013/01/9a16a33e-462e-4149-a9a8-5f2e11c2c6b6.Full_.jpg
https://en.wikipedia.org/wiki/Gorgon_Stare
https://en.wikipedia.org/wiki/ARGUS-IS
https://en.wikipedia.org/wiki/Reconnaissance_satellite
https://support.google.com/earth/answer/148094?hl=en
https://archive.fo/Yaj8i
https://www.gislounge.com/satell..
