weather forecasting
- 1. TJChiggs
- 2. ….
- 3. Weather forecasting • Is the application of SCIENCE and TECHNOLOGY to predict the state of the atmosphere for a location • Science and technology mainly meaning computer systems • Computers are used for two main applications in weather forecasting: 1. Data logging 2. Modeling
- 4. Data logging (mainly data collection) • (Definition: Data logging is the collection of data at set intervals using sensors ,ADCs and computer systems to monitor a process.) • Sometimes used in monitoring and controlling systems • NB: No controlling involved in weather forecasting
- 5. Methods to collect data 1. Weather balloons 2. Weather satellites 3. Weather stations
- 6. ……….chankman Weather balloons • A weather balloon carries a radiosonde into the atmosphere • A radiosonde is a battery powered telemetry instrument • Telemetry meaning automated communication process by which data is collected at inaccessible points and transmitted to the receiving end • (ground receiver) • A radiosonde has: 1 sensors 2transimission path
- 7. ...........moyes • The data is sent to the ground receiver as radio signals • The ADC convert the from analogue format to digital format
- 8. Radiosonde
- 9. ……..madhara Weather satellites .primarily used to monitor the weather and climate on earth • Transmit pictures to the ground receiver as coded radio signals • The images determine the amount of cloud covered ,wind direction etc
- 10. ….. Weather station • These are ground recording stations
- 11. 2. MODELLING • mEteoRolOgists select a group of equations that describe the conditions of the atmosphere • They pick out the factors they think are important • These values are fed into a computer • After a period of time the computer will produce results of the atmospheric conditions changes that might be expected
- 12. …….. • The accuracy of the predictions depend on the data available to the computer • The predictions require most POWERFUL COMPUTERS