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  2. Nephoscope - Wikipedia

    en.wikipedia.org/wiki/Nephoscope

    If the instrument stands on level ground, so that the observer's eye is always at the same height, and if the interval between two successive spikes is equal to one-tenth of their altitude above the eye-level of the observer, one only needs to multiply the time required for the cloud to pass over one interval by 10 to determine the time the ...

  3. Okta - Wikipedia

    en.wikipedia.org/wiki/Okta

    In meteorology, an okta is a unit of measurement used to describe the amount of cloud cover at any given location such as a weather station. Sky conditions are estimated in terms of how many eighths of the sky are covered in cloud , ranging from 0 oktas (completely clear sky) through to 8 oktas (completely overcast ).

  4. Ceiling projector - Wikipedia

    en.wikipedia.org/wiki/Ceiling_projector

    The observer looks through the eyepiece and sets the sight onto the spot projected on the cloud and reads the height from the attached scale. When the cloud is thin the beam of light may penetrate into the cloud. The observer should read the scale where the light first enters the cloud and not at the top.

  5. Ceilometer - Wikipedia

    en.wikipedia.org/wiki/Ceilometer

    A ceilometer is a device that uses a laser or other light source to determine the height of a cloud ceiling or cloud base. [1] Ceilometers can also be used to measure the aerosol concentration within the atmosphere. [2] A ceilometer that uses laser light is a type of atmospheric lidar (light detection and ranging) instrument. [3] [4]

  6. Station model - Wikipedia

    en.wikipedia.org/wiki/Station_model

    On the top right corner of the model for a surface weather map is the pressure, showing the last two integer digits of the pressure in millibars, or hectopascals, along with the first decimal. For instance, if the pressure at a certain location is 999.7 hPa, the pressure portion of the station model will read 997.

  7. List of Earth observation satellites - Wikipedia

    en.wikipedia.org/wiki/List_of_Earth_observation...

    Monitored weather using bursts of microwaves which measure wind speeds. [37] Resurs-DK No.1: Inactive Roscosmos: 2006 RISAT-1: Inactive ISRO: 2012 Retired 2016. SAC-D: Inactive NASA and CONAE: 2011 Carried the Aquarius instrument, which measured ocean salinity (salt concentration) which improves knowledge of heat transport and storage in the ocean.

  8. Surface weather analysis - Wikipedia

    en.wikipedia.org/wiki/Surface_weather_analysis

    Surface weather analysis is a special type of weather map that provides a view of weather elements over a geographical area at a specified time based on information from ground-based weather stations. [1] Weather maps are created by plotting or tracing the values of relevant quantities such as sea level pressure, temperature, and cloud cover ...

  9. Earth observation satellite - Wikipedia

    en.wikipedia.org/wiki/Earth_observation_satellite

    GOES-8, a United States weather satellite. A weather satellite is a type of satellite that is primarily used to monitor the weather and climate of the Earth. [10] These meteorological satellites, however, see more than clouds and cloud systems.

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