About Spot GEN.3 Satellite Messenger
I would like to know about the Spot GEN. 3 satellite messenger. What is it actually? Does it send messages about the condition and the images of the view from the satellite to us? When and who invented it? Is it available for civilians or for only astronuts and other Astronomy related personalities? What of its features or its used material makes it exceptionally expensive? Why is it so famous in China? Was it originated from China?