Earth observations taken during STS-83 mission

STS083-748-006 (4-8 April 1997) --- This type of scene is seen about every 45 minutes as the astronauts travel around the world. Sunrises and sunsets differ in structure, since the tropopause altitude and atmospheric lamina temperatures vary with time of day, season, and latitude. Close analysis of these terminator photographs provide counts of the number and spacing of atmospheric laminae. In the photographs, as many as 4 laminae have been noted in the normally red-to-orange troposphere, and up to 12 laminae have been counted in the blue upper atmosphere. However, true replication of human vision is not possible using present films. For instance, while on orbit, one astronaut counted 22 layers. The photograph of that event recorded only 8 such layers.