I don't think so. It is clear you haven't even done a back-of-the-envelope analysis of the problems. Too big. Too iffy. A satellite would be in view for maybe 15 minutes at best, at varying angles of view. Projected images are pretty obvious as projected images. (Holograms cannot be projected; they are virtual images.)
Holograms can't be projected? I've been in the advanced display industry for almost 25 years, including working alongside consultants who've designed major theatrical productions in Vegas of dead artists "performing" via projected holograms.
Steering a projected image on a fixed 'screen' from a moving satellite is no more technically challenging than what satellites do today with cameras fixed on a geolocation. When a cloud layer obscures the light source, that light source would be undetectable.
I said this is a possible scenario; drones could also achieve the same result.
Are you sure you are talking about a hologram? They are only interference patterns. They will reconstruct an image if illuminated with coherent light. They can be quite amazing (I've seen some doozies), but they are only a virtual image arising from the interference pattern. I've seen a full-color, daylight reflective hologram with barely perceptible speckle. That was in the mid-1970s.
There may be tricks to projecting 3D images, which are not holograms, and I would be interested in them. 3D movies use stereography to good effect. The Disney Haunted Mansion used a semitransparent mirror to reflect ghost images over the fixed set background.
Steering an image on a fixed screen (oblique) from a moving satellite through a refractive medium is far more challenging than taking overhead photography. When a cloud layer obscures the light source, the image would shut off. I speak from experience at working the problem of steering and focusing laser beams for target engagements. Not nearly as complex as projecting an image, and one hell of a ball-buster problem to solve successfully.
I gather you haven't done any calculations on pixel size based on projected spot size, jitter, and depth of focus irregularities.
Another approach is a "rain" of micro-LEDs as small aerosol particles, programmed to turn on or off according to color based on instructions beamed to them relative to a GPS-determined spatial grid. That was one invention concept I submitted a long time ago, but my company deemed it outside of their business model.
One possibility that is achievable today…Sat-based laser projection onto an aerosolized projection screen laid across the sky by planes.
A patent owned by Disney:
“ Aerial display system with floating projection screen”
https://patents.google.com/patent/US20140233099A1/en
I don't think so. It is clear you haven't even done a back-of-the-envelope analysis of the problems. Too big. Too iffy. A satellite would be in view for maybe 15 minutes at best, at varying angles of view. Projected images are pretty obvious as projected images. (Holograms cannot be projected; they are virtual images.)
Holograms can't be projected? I've been in the advanced display industry for almost 25 years, including working alongside consultants who've designed major theatrical productions in Vegas of dead artists "performing" via projected holograms.
Steering a projected image on a fixed 'screen' from a moving satellite is no more technically challenging than what satellites do today with cameras fixed on a geolocation. When a cloud layer obscures the light source, that light source would be undetectable.
I said this is a possible scenario; drones could also achieve the same result.
Are you sure you are talking about a hologram? They are only interference patterns. They will reconstruct an image if illuminated with coherent light. They can be quite amazing (I've seen some doozies), but they are only a virtual image arising from the interference pattern. I've seen a full-color, daylight reflective hologram with barely perceptible speckle. That was in the mid-1970s.
There may be tricks to projecting 3D images, which are not holograms, and I would be interested in them. 3D movies use stereography to good effect. The Disney Haunted Mansion used a semitransparent mirror to reflect ghost images over the fixed set background.
Steering an image on a fixed screen (oblique) from a moving satellite through a refractive medium is far more challenging than taking overhead photography. When a cloud layer obscures the light source, the image would shut off. I speak from experience at working the problem of steering and focusing laser beams for target engagements. Not nearly as complex as projecting an image, and one hell of a ball-buster problem to solve successfully.
I gather you haven't done any calculations on pixel size based on projected spot size, jitter, and depth of focus irregularities.
Another approach is a "rain" of micro-LEDs as small aerosol particles, programmed to turn on or off according to color based on instructions beamed to them relative to a GPS-determined spatial grid. That was one invention concept I submitted a long time ago, but my company deemed it outside of their business model.