< STS41D-32-14 >
| NASA Photo ID | STS41D-32-14 |
| Focal Length | 250mm |
| Date taken | 1984.08.30 |
| Time taken | 20:08:14 GMT |
Resolutions offered for this image:
4440 x 4600 pixels 483 x 500 pixels 640 x 480 pixels 668 x 654 pixels
4440 x 4600 pixels 483 x 500 pixels 640 x 480 pixels 668 x 654 pixels
Cloud masks available for this image:
Spacecraft nadir point: 21.1° N, 122.9° E
Photo center point:
Photo center point by machine learning:
Photo center point:
Photo center point by machine learning:
Nadir to Photo Center:
Spacecraft Altitude: 162 nautical miles (300km)
Country or Geographic Name: | |
Features: | THUNDERSTORM SILHOUETTE |
| Features Found Using Machine Learning: | |
Cloud Cover Percentage: | |
Sun Elevation Angle: | -19° |
Sun Azimuth: | 70° |
Camera: | Hasselblad |
Focal Length: | 250mm |
Camera Tilt: | |
Format: | 6017: Kodak Ektachrome 64, 220 Roll Format |
Film Exposure: | Normal |
| Additional Information | |
| Width | Height | Annotated | Cropped | Purpose | Links |
|---|---|---|---|---|---|
| 4440 pixels | 4600 pixels | No | No | Download Image | |
| 483 pixels | 500 pixels | No | No | Download Image | |
| 640 pixels | 480 pixels | No | No | Download Image | |
| 668 pixels | 654 pixels | No | No | Download Image |
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No GeoTIFF is available for this photo.Image Caption: Aug 1984, "Clean" Earth Limb with Silhouette of Clouds.
This is a photo of the Earth's atmosphere at the terminator
(when the sun is setting or rising). It something the
astronauts see about every 45 minutes as they circle the
Earth. You can see how thin the atmosphere is and what
portion of that holds the oxygen that we all require. I am
going to concentrate mostly on the troposphere layer for the
rest of this brief, after we look at a couple more Earth
Limbs.
Close analyses 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 in the blue layer alone. The photograph
of that event recorded only 8 such layers. Sunrises and
sunsets differ in structure, since the tropopause altitude
and atmospheric lamina temperatures vary with time of day,
season, and latitude. This particular photograph was
probably taken out over the southeast Pacific approaching
the coast of Chile looking eastward at a sunrise over the
Andes Mountains. The building of cumulus clouds over the
rain forests of the Amazon basin can be seen pushing well
above the tropopause.
This is a photo of the Earth's atmosphere at the terminator
(when the sun is setting or rising). It something the
astronauts see about every 45 minutes as they circle the
Earth. You can see how thin the atmosphere is and what
portion of that holds the oxygen that we all require. I am
going to concentrate mostly on the troposphere layer for the
rest of this brief, after we look at a couple more Earth
Limbs.
Close analyses 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 in the blue layer alone. The photograph
of that event recorded only 8 such layers. Sunrises and
sunsets differ in structure, since the tropopause altitude
and atmospheric lamina temperatures vary with time of day,
season, and latitude. This particular photograph was
probably taken out over the southeast Pacific approaching
the coast of Chile looking eastward at a sunrise over the
Andes Mountains. The building of cumulus clouds over the
rain forests of the Amazon basin can be seen pushing well
above the tropopause.
