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View Full Version : Discussion: Tracking Rainfall, Just By its ...



Fraser
2004-Sep-10, 04:51 PM
SUMMARY: Scientists working with the Gravity Recovery and Climate Experiment (Grace) have demonstrated that they can track changes in the Earth's environment by measuring its gravity field. Launched in 2002, Grace is actually two identical spacecraft that keep track of their precise distance from each other. As they pass over the lumpy gravity field of the Earth, their distance changes, which they can measure and turn into a gravity map of the planet. The mission demonstrated that it could measure 10 cm (4 in) of rainfall in the Amazon, just from the effect of its gravity.

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StarLab
2004-Sep-10, 05:21 PM
I wonder if they could put up more satellites that could do this?

antoniseb
2004-Sep-10, 06:04 PM
Originally posted by StarLab@Sep 10 2004, 05:21 PM
I wonder if they could put up more satellites that could do this?
Sure, they could launch more, but it might not get any better information. The data can't be very sharp because it is being measured by the pull of something 100 miles away, resulting in a spatial resolution of about 100 miles.

piersdad
2005-Mar-11, 06:44 AM
hmmm here is a example of gravity and instant communication.

-- now if we could design a gravity beam--

instant communication