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How GPS works: The National Spatial Reference System

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A composite satellite image of the Earth at night.

Podcast: Geodesy, the invisible backbone of navigation

January 19, 2018

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Geodesy is the science of accurately measuring and understanding the Earth's geometric shape, orientation in space, and gravity field.

What is geodesy?

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A geodesist on the National Mall looking through a surveying device.

Flying high to measure gravity: Humans optional

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NOAA is exploring using unmanned aircraft to more efficiently collect gravity data around the nation.

August 2018 was 5th hottest August on record for the globe

Polar sea ice coverage remains at near-record lows

AROUND NOAA //

Hurricane Florence: Get the latest from NOAA's National Hurricane Center [EXT]

Evaluating Florence damage from the air: NOAA begins aerial surveys [EXT]

Ask the scientist: How can the weather spark and spread wildfires?

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