ISS002-E-5677
| NASA Photo ID | ISS002-E-5677 |
| Focal Length | 800mm |
| Date taken | 2001.04.18 |
| Time taken | 20:18:00 GMT |
Resolutions offered for this image:
540 x 332 pixels 400 x 273 pixels 3060 x 2092 pixels 640 x 437 pixels
540 x 332 pixels 400 x 273 pixels 3060 x 2092 pixels 640 x 437 pixels
Cloud masks available for this image:
Spacecraft nadir point: 19.2° S, 139.8° W
Photo center point: 19.5° S, 139.0° W
Photo center point by machine learning:
Photo center point: 19.5° S, 139.0° W
Photo center point by machine learning:
Nadir to Photo Center: East
Spacecraft Altitude: 205 nautical miles (380km)
Country or Geographic Name: | TUAMOTU ARCHIPELAGO |
Features: | NUKUTAVAKE ISLAND |
| Features Found Using Machine Learning: | |
Cloud Cover Percentage: | 10 (1-10)% |
Sun Elevation Angle: | 56° |
Sun Azimuth: | 27° |
Camera: | Kodak DCS460 Electronic Still Camera |
Focal Length: | 800mm |
Camera Tilt: | 14 degrees |
Format: | 3060E: 3060 x 2036 pixel CCD, RGBG array |
Film Exposure: | |
| Additional Information | |
| Width | Height | Annotated | Cropped | Purpose | Links |
|---|---|---|---|---|---|
| 540 pixels | 332 pixels | Yes | Yes | NASA's Earth Observatory web site | Download Image |
| 400 pixels | 273 pixels | No | No | Photographic Highlights | Download Image |
| 3060 pixels | 2092 pixels | No | No | Download Image | |
| 640 pixels | 437 pixels | No | No | Download Image |
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Image Caption: This image of the Tuamotu Archipelago, French Polynesia, illustrates diversity in the morphology of atolls, one of the major types of coral reef formations. A typical atoll structure is a lagoon surrounded by a closed rim of cays and shallow spillways that control the exchange of water between the ocean and the lagoon. However, like human beings, this general scheme may vary according to the history of each individual atoll, resulting in a high diversity of morphology, especially for small atolls. On Nukutavake (138deg48' W 19deg17' S, 6.2 km2), what was a lagoon on is now dry and completely covered by vegetation. Images such as these are useful to classify and study the atolls according to their spatial structure.
