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  2. Cloud top - Wikipedia

    en.wikipedia.org/wiki/Cloud_top

    View of clouds from above. The cloud top (or the top of the cloud) is the highest altitude of the visible portion of a cloud.It is traditionally expressed either in metres above the Earth (or planetary) surface, or as the corresponding pressure level in hectopascal (hPa, equivalent to the traditional but now obsolete millibar).

  3. Okta - Wikipedia

    en.wikipedia.org/wiki/Okta

    Cloud-cover symbols used on weather teleprinters and aviation reports in the US [6] In the early 20th century, it was common for weather maps to be hand drawn. The symbols for cloud cover on these maps, like the modern symbols, were drawn inside the circle marking the position of the weather station making the measurements.

  4. Cloud cover - Wikipedia

    en.wikipedia.org/wiki/Cloud_cover

    The average cloud cover of the Earth, 2005-2013. Colors range from blue (no clouds) to white (totally cloudy). [6] (click for more detail) Cloud cover values only vary by 3% from year-to-year averages, whereas the local, day-to-day variability in cloud amounts typically rises to 30% over the globe.

  5. Elevation Earth for iOS is endlessly fascinating and educational

    www.aol.com/news/2014-03-25-elevation-earth-for...

    Elevation is sometimes subtle on a 3D map of the planet, so the app lets you exaggerate elevation up to a hundred times. One of the most striking effects is to manipulate sea level and watch areas ...

  6. Cloud base - Wikipedia

    en.wikipedia.org/wiki/Cloud_base

    This will give the altitude of the cloud base in feet above ground level. Put in a simpler way, 400 feet for every 1°C dew point spread. For metric divide the spread in °C by 8 and multiply by 1000 and get the cloud base in meters. Add the results from step (2) to the field elevation to obtain the altitude of the cloud base above mean sea level.

  7. Advanced Spaceborne Thermal Emission and Reflection ...

    en.wikipedia.org/wiki/Advanced_Spaceborne...

    ASTER provides high-resolution images of Earth in 14 different bands of the electromagnetic spectrum, ranging from visible to thermal infrared light. The resolution of images ranges between 15 and 90 meters. ASTER data is used to create detailed maps of surface temperature of land, emissivity, reflectance, and elevation. [1]

  8. Cloud physics - Wikipedia

    en.wikipedia.org/wiki/Cloud_physics

    the cloud IR emissivity, with values between 0 and 1, with a global average around 0.7; the effective cloud amount, the cloud amount weighted by the cloud IR emissivity, with a global average of 0.5; the cloud (visible) optical depth varies within a range of 4 and 10. the cloud water path for the liquid and solid (ice) phases of the cloud particles

  9. Cloud height - Wikipedia

    en.wikipedia.org/wiki/Cloud_height

    The cloud height, more commonly known as cloud thickness or depth, is the distance between the cloud base and the cloud top. [1] It is traditionally expressed either in metres or as a pressure difference in hectopascal (hPa, equivalent to millibar ).