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Transcript of Weather Forecasting
Wind speed is recorded in kilometers per hour.
Rainfall is measured using a tilting bucket. When the water is filled the bucket tilts and tips the water out and brings another bucket into position to refill.
A special diode detects the sunshine. After the signal is converted from an analogue to digital one it is passed on to the microprocessor.
It is used to determine the sunrise and sunset time and also to measure sunshine hours.
wind speed is measured by an anemometer using an optical sensor to generate a binary signal each time it rotates
An optical sensor detects the number of tips and this signal is passed to the microprocessor
Daylight & $unshine hour$
weather reporting is an application of data logging. data logging involves recording quantities automatically over a set of time.
for weather reporting, these quantities are illustrated in:
daylight and sunshine hours
Most data loggers do not need to be connected to a computer all the. instead they store data in logger for a period (50 hours for a particular package) it also possible to show data continuously, but this ties up a computer and prevents it being used for anything else.
Sensors act as input devices in computers. the senors measure the following.
The wind direction is detected on a grey disk. as wind vane rotates, three optical sensors read the disk and generate a three bit binary pattern. each pattern represents eight wind directions. for instance pattern 010 might represent north-west.
Additional sensors that measure atmospheric pressure and relative humidity(a measure of the most amount of moisture in the air) may also be connected to the system.
Weather Reporting the OLD way :P
How is the stevensons screen used?
A stevenson screen is an geographical instrument that is used in the storage of thermometers. they are normally shaded to block air temperatures to prevent direct insulation.
*If a human takes the reading three times a day also but still it won't be accurate and efficient as well
*The weather will change with in minutes so the reading which the person took are wasted.
*Complete record is required without missing a day(no holidays)
A data logging system would be help full data logging is commonly used in scientific experiments and in monitoring system where there is need to collect information faster than a human can possibly collect the information and in cases where accuracy is essential.examples, of the types of information a data logging system can collect including temperatures, sound frequencies,vibrations,time,light intensities, electrical currents, pressure and changes in states of matter.