< ISS036-E-35665 >
| NASA Photo ID | ISS036-E-35665 |
| Focal Length | 50mm |
| Date taken | 2013.08.24 |
| Time taken | 20:00:08 GMT |
Resolutions offered for this image:
1000 x 665 pixels 540 x 359 pixels 1440 x 960 pixels 720 x 480 pixels 4256 x 2832 pixels 640 x 426 pixels
1000 x 665 pixels 540 x 359 pixels 1440 x 960 pixels 720 x 480 pixels 4256 x 2832 pixels 640 x 426 pixels
Spacecraft nadir point: 28.7° N, 119.6° W
Photo center point: 28.0° N, 118.5° W
Photo center point by machine learning:
Photo center point: 28.0° N, 118.5° W
Photo center point by machine learning:
Nadir to Photo Center: Southeast
Spacecraft Altitude: 221 nautical miles (409km)
Country or Geographic Name: | MEXICO |
Features: | GUADALUPE I., VON KARMAN VORTICES |
| Features Found Using Machine Learning: | |
Cloud Cover Percentage: | 100 (76-100)% |
Sun Elevation Angle: | 72° |
Sun Azimuth: | 179° |
Camera: | Nikon D3S Electronic Still Camera |
Focal Length: | 50mm |
Camera Tilt: | 20 degrees |
Format: | 4256E: 4256 x 2832 pixel CMOS sensor, 36.0mm x 23.9mm, total pixels: 12.87 million, Nikon FX format |
Film Exposure: | |
| Additional Information | |
| Width | Height | Annotated | Cropped | Purpose | Links |
|---|---|---|---|---|---|
| 1000 pixels | 665 pixels | No | Yes | Earth From Space collection | Download Image |
| 540 pixels | 359 pixels | Yes | Yes | Earth From Space collection | Download Image |
| 1440 pixels | 960 pixels | No | No | NASA's Earth Observatory web site | Download Image |
| 720 pixels | 480 pixels | Yes | No | NASA's Earth Observatory web site | Download Image |
| 4256 pixels | 2832 pixels | No | No | Download Image | |
| 640 pixels | 426 pixels | No | No | Download Image |
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No GeoTIFF is available for this photo.Image Caption: Cloud Swirls and Ripples, Guadalupe Island, Baja California
Guadalupe Island (image left) is a volcanic edifice 35 km long that lies 240 km off the coast of Mexico's Baja California peninsula. Winds on the August day this astronaut photograph was taken were blowing from the north (left), and gave rise to a series of eddies in the atmosphere which appear as circles and swirls in the clouds downwind of the island. Known technically as a Von Karman vortex street, obstacles of any kind can set up such vortices, from islands to craters to chimneys. The size of each swirl can be judged from the length of the island. Under ideal conditions clouds make the swirls visible.
A vortex street will only form under certain conditions of air speed, atmospheric stability and obstacle size. Conditions are ideal for production of vortex streets in the vicinity of Guadalupe Island, which is known to produce them almost every day in June, July and August. The phenomenon is named after Theodore von Karman (1881-1963), a Hungarian-American engineer and fluid mechanics expert.
Also visible at image top right is a series of parallel cloud lines. Known colloquially as "gravity waves," these are ripples at the boundary between layers of slightly different density within the atmosphere.
Guadalupe Island (image left) is a volcanic edifice 35 km long that lies 240 km off the coast of Mexico's Baja California peninsula. Winds on the August day this astronaut photograph was taken were blowing from the north (left), and gave rise to a series of eddies in the atmosphere which appear as circles and swirls in the clouds downwind of the island. Known technically as a Von Karman vortex street, obstacles of any kind can set up such vortices, from islands to craters to chimneys. The size of each swirl can be judged from the length of the island. Under ideal conditions clouds make the swirls visible.
A vortex street will only form under certain conditions of air speed, atmospheric stability and obstacle size. Conditions are ideal for production of vortex streets in the vicinity of Guadalupe Island, which is known to produce them almost every day in June, July and August. The phenomenon is named after Theodore von Karman (1881-1963), a Hungarian-American engineer and fluid mechanics expert.
Also visible at image top right is a series of parallel cloud lines. Known colloquially as "gravity waves," these are ripples at the boundary between layers of slightly different density within the atmosphere.
