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  2. Ceiling balloon - Wikipedia

    en.wikipedia.org/wiki/Ceiling_balloon

    A ceiling balloon also called a pilot balloon or pibal, is used by meteorologists to determine the height of the base of clouds above ground level during daylight hours. In the past, and sometimes today, a theodolite was used to track the balloon in order to determine the speed and direction of winds aloft. [ 1 ]

  3. Theodolite - Wikipedia

    en.wikipedia.org/wiki/Theodolite

    There is a long history of theodolite use in measuring winds aloft, by using specially-manufactured theodolites to track the horizontal and vertical angles of special weather balloons called ceiling balloons or pilot balloons (pibal). Early attempts at this were made in the opening years of the nineteenth century, but the instruments and ...

  4. Glossary of meteorology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_meteorology

    ceiling balloon. Also pilot balloon or pibal. A type of weather balloon used by meteorologists to determine the height of the cloud base above ground level during daylight hours by measuring the time it takes for the balloon, released from the ground and rising at a known rate of ascent, to begin to disappear into the clouds. ceiling projector

  5. Weather balloon - Wikipedia

    en.wikipedia.org/wiki/Weather_balloon

    A weather balloon, also known as a sounding balloon, is a balloon (specifically a type of high-altitude balloon) that carries instruments to the stratosphere to send back information on atmospheric pressure, temperature, humidity and wind speed by means of a small, expendable measuring device called a radiosonde.

  6. Meteorological instrumentation - Wikipedia

    en.wikipedia.org/wiki/Meteorological_instrumentation

    The principle behind the ceiling balloon is a balloon with a known ascent rate (how fast it climbs) and determining how long the balloon rises until it disappears into the cloud. Ascent rate times ascent time yields the ceiling height. A disdrometer is an instrument used to measure the drop size distribution and velocity of falling hydrometeors.

  7. Chinese balloon, State of the Union, debt ceiling: This week ...

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  8. Insight: How bond vigilantes could check Trump's power - AOL

    www.aol.com/news/insight-bond-vigilantes-could...

    Persistent wrangling over the U.S. debt ceiling, further downgrades to the U.S. credit rating or a fall in foreign demand for U.S. Treasuries due to reasons like sanctions and wars could make ...

  9. Coastal-Marine Automated Network - Wikipedia

    en.wikipedia.org/wiki/Coastal-Marine_Automated...

    The Coastal-Marine Automated Network (C-MAN) is a meteorological observation network along the coastal United States. Consisting of about sixty stations installed on lighthouses, at capes and beaches, on near shore islands, and on offshore platforms, the stations record atmospheric pressure, wind direction, speed and gust, and air temperature; however, some C-MAN stations are designed to also ...

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