Introduction
reception station
At the beginning, the operation of building a reception station required considerable means, and only specialized institutions had access to these techniques. Nowadays, because of the recent development of micro-computers and signal processing, it is now possible for even a small institution to have its own station able to receive net images from certain meteorological satellites such as NOAA and METEOSAT satellites with affordable costs [1]
The techniques of weather satellites images reception has quickly evolved in the last decade.
Satellite Image Acquisition is one of the most explored domains in satellite communications since the start of the space age. Satellite images provide us with a wealth of
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A major drawback of using GEO satellites is that the systems require the use of industry grade parabolic dishes along with complex RF circuitry. [1]
The NOAA satellites belong to the category of the Polar Orbiting Satellites[1]
From the unique vantage point of space , those NOAA satellites bring us information about cloud formations and movements, precipitation amounts, temperatures, ocean currents, sea surface temperatures, air and water pollutants, drought and floods, severe weather conditions, vegetation, insect infestations, ozone content of the atmosphere, volcano eruptions, and other factors that affect our daily lives.
APT
Much of this information is transmitted from these satellites via direct readout to ground stations where it can be displayed and analyzed. These Direct Readout Services were pioneered more than 45 years ago by the first weather satellites and have been expanded and operated in the United States by the National Oceanic and Atmospheric Administration (NOAA).
Most weather satellites offer two kinds of picture services, a digital transmission format with high resolution data named HRPT, and an analogical transmission format of lower resolution APT.
SDR
This APT transmission format needs limited technical resources for reception and decoding.
For that a Software-defined radio SDR receivers matching with good antenna and an efficient software systems are required
An SDR is a radio
This website shows a course using this technology used for radio networking planning and design.
During the Space Race, the first orbital satellites were sent to outer space. Today, Americans can communicate, predict the weather, and study geodetics because of the satellites that first orbited in space.All satellites and space probes carry specialized radios receiving and transmitting equipment for guidance and control purposes as well as relaying data from space to Earth. Without the first satellite transmission of a human voice in 1958, communication would not be as efficient (Rabinowitch, 1963).
Weather is the state of the atmosphere at a given time and place, with respect to variables such as temperature, moisture, wind velocity, and barometric pressure. Weather can be classified as day to day temperature and precipitation activity, where climiate is average atmospheric conditions over longer periods of time. Weather occurs from temperature and moisture differences between one place and another. These differences can occur due to the sun angle at any particular spot. The strong temperature contrast between polar and tropical air gives rise to the jet stream. Weather systems in the mid-latitudes, such as "extratropical cyclones", are caused by instabilities of the jet stream flow. Because the Earth's axis is tilted
data has to be, and what pieces of software computers need to have to send this kind of data.
Although meteorologist hardly acknowledge that their forecasts are not completely accurate, it is clear that without them the amount of harm would be great. The information of a possible tornado formation helps the public become prepared to the possibility of a tornado. Tornadoes warning systems have come a long way from the days where they were inaccurate and unreliable. Lead times have increased and are becoming more reliable. However, more sensitive technology is needed until forecasts can become more
But not all weathermen are meteorologists, many are broadcast journalists. Broadcast meteorologists are equal to atmospheric scientists. All in all the jobs are alike in many ways but they all do different tasks, even though they help each other to research and predict the climate and weather. Broadcast meteorologist take the data and information given to them from atmospheric scientists, and relay that information to the public, so we can know what the weather will be like for the future, but to also know if severe weather is forthcoming, and the actions needed to avoid serious injury to
Since the beggining of time, man has always been curious about its surroundings. But, as time changes so do the techniques and technology used by curious investigators. Weather satellites have proved the most useful technology in the passages because they can gather information about on coming weather, they can save lives, and they are a tool that works well with other weather calculating instruments that allow for a better prediction of approaching weather and storms.
1. It is hard to imagine a world without weather forecasts as they have become so indispensable to so many facets of everyday life in the 21st Century.
icons for forecasting (sunny, cloudy, rain, snow), date and time, information on humidity and plenty more.
Weather is created by the movement of air masses of different temperature and moisture content moving around the Earth’s atmosphere and interacting with each other.
A weather satellite is used by meteorologists to gather information about the weather. Weather satellites give meteorologists a view of weather patterns over a very large area. This enables meteorologists to track large weather patterns and make more accurate predictions of future weather behavior.
Dropsondes are a good example. According to Caldwell in paragraph 7, "satelite images have limitations" and only "provide rough estimations" The dropsondes in the event that a satelite image doesnt recover enough details, sends and "transmits bursts of data to the airplane twice every second... the data includes temperature, humidity, atmospheric pressure, as well as the speed and direction of the winds. Even though the dropsondes can do this, the satelites are more useful and helpful because they cover a much larger area and can see the size of something as
A meteorologist in the military makes weather observations and forecasts for missions around the world.
NOAA has been using tools since the 1800’s to observe and figure out the weather.
There are many different uses for rockets, we use them in our daily lives. Whether it's just for fun, in our jobs, or fighting for our lives. We use rockets in the military for wars and such. In the military we use rockets for, weapons (missiles, bombs, guns, fire explosives) to shoot down other aircraft or enemies down on ground. Satellites have been used for years for various purposes including scientific research, weather reporting, communications, navigation and even for observing Earth. Engineers have played a big role in designing these satellites, getting them into orbit, and using the information they relay back to Earth. Meteorologists are able to predict the changes in weather patterns by using several different tools. They use these tools to measure atmospheric conditions that occurred in the past and present, and they apply this information to create educated guesses about the future weather. Most people are familiar with thermometers, barometers, and anemometers for measuring temperature, air pressure, and wind speed, respectively. Meteorologists use other tools, as well. With communication, we can relate back to satellites, satellites get sent up into orbit and programed to report back to earth all over the place. This includes texting, calling, emailing,