NASA | Getting the Big Picture

NASA | Getting the Big Picture


[ rain, thunder ] [ thunder, music ] [ bugs buzzing ]
If we measure the Earth from the ground, we can a get a good local picture of what is going around us. But if we want to measure larger portions of the Earth, then we’ll need to use remote sensing. Remote sensing measures the Earth and its features without making physical contact. We can gather data from entire continents over longer time periods so we can look at how the Earth is changing. NASA uses specialized aircraft and sophisticated satellites to gather data using both passive and active remote sensing methods. Passive remote sensing measures the natural energy, or radiation, of the Earth. Active remote sensing gathers data by actively sending out signals that interact with the target of interest. Using both active and passive remote sensing techniques, NASA can look at soil moisture maps to monitor drought, estimate snowpack in areas where snow is crucial for freshwater, measure the change in ice sheets and sea level, tracking storms that could impact human lives, and observing how precipitation changes affect where we get our freshwater. The Global Precipitation Measurement mission helps fill in the gaps where ground measurement isn’t enough. Places with rugged terrain can block the signals from ground radars. The oceans are too vast to cover with enough ships and measurement stations on the surface, and places without the network of instruments needed to measure freshwater for people and agriculture. We can then unify the measurements to create a consistent and accurate picture no matter where we are. Because satellites get more complete coverage than ground-based instruments, we can use remote sensing to better see how the whole Earth is changing over time. With a long data record we can make better predictions about the water cycle, the climate, and the impact on humans.
[ wind, thunder, rain ] [ wind, debris flying ] [ tree splitting, insects swarming ] [ debris falling, bubbling, airplanes ] [ music ] By observing our Earth from above, we get a much better understanding of what is happening on the surface, in the atmosphere, underground, over the globe, and in our own backyard.
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  1. The planes in your video should have long trails behind them should they not ?
    never mind I know NASA doesn't want to talk about them even though they can see them from space .
    Some countries have them some do not so they must be natural that's why when I walk down the road on a cold day I can see my breath going back two miles oh wait no I can't .

  2. I vote no more funding for NASA until complete reform. no more satellites til some removed. no more full scale experimentation and weather manipulation. no more hiding data or photoshopping. Mainly no more rituals, ceremonies, religious or anti-religious or other likewise, or affiliated titles and practices. thank you you dirty backstabbing sick fucks. Have a nice day

  3. This is really nice, but what about the UFO's people see all of the time, how come NASA has never reported seeing one with all of this gear?

  4. I like the presentation style of this video. I'm well into middle-age and have a long-standing interest in science and space tech, more usually shown in a dry technical style. This video has all the details for an overview understanding of the science, presented in a friendly yet clear manner. Well done NASA Goddard!

  5. NASA seriously needs to be replaced by GOOGLE, and save the tax payers their hard earned money! What a waste of time and energy, all I see flying by in the air is what left our pockets, AGAINST OUR WILL, and into these commercials and Computer Generated Graphics. IT SUCKS!

  6. Droughts happens because of wild forests almost destroyed all over the planet. Where should the moisture condense if there's no earthworms in the soil and no trees that prevents soil microorganisms from burning?!

  7. Excuse me but the 0:46 to 0:60 animation and script "Passive remote sensing measures the natural energy, or radiation, of the Earth" are misleading. The script should read "Passive remote sensing measures the natural energy, or radiation, of the Earth, and/or reflected sunlight" — and the animation should not use what appear to be rising bubbles of gas to represent the emission of electromagnetic radiation. Goodness knows, people are confused enough already without any additional help. GSFC you can do better than this — can you fix it?

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