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Science Magazine Podcast

Sending flocks of tiny satellites out past Earth orbit and solving the irrigation efficiency paradox

Science Magazine Podcast

Science Podcast

News, News Commentary, Science

4.3842 Ratings

🗓️ 23 August 2018

⏱️ 22 minutes

🧾️ Download transcript

Summary

Small satellites—about the size of a briefcase—have been hitching rides on rockets to lower Earth orbit for decades. Now, because of their low cost and ease of launching, governments and private companies are looking to expand the range of these “sate-lites” deeper into space. Host Sarah Crespi talks with Deputy News Editor Eric Hand about the mods and missions in store for so-called CubeSats. And our newest podcast producer Meagan Cantwell interviews Quentin Grafton of Australian National University in Canberra and Brad Udall of Colorado State University in Fort Collins about something called the “irrigation efficiency paradox.” As freshwater supplies dry up around the world, policymakers and farmers have been quick to try to make up the difference by improving irrigation, a notorious water waster. It turns out that both human behavior and the difficulty of water measurement are plaguing water conservation efforts in agriculture. For example, when farms find they are using less water, they tend to plant ever-more-water-intensive crops. Now, researchers are trying to get the message out about the behavioral component of this issue and tackle the measurement problem, using cheap remote-sensing technology, but with water scarcity looming ahead, we have to act soon. This week’s episode was edited by Podigy. Download a transcript of this episode (PDF) Listen to previous podcasts. About the Science Podcast [Image: John A. Kelley, USDA Natural Resources Conservation Service; Music: Jeffrey Cook] Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

Morgan State University, a Baltimore, Maryland Carnegie R2 doctoral research institution,

0:05.0

offers more than 100 academic programs and awards degrees at the Baccliorate, Masters, and Doctoral Levels,

0:12.0

is furthering their mission of growing the future leading the world.

0:16.0

Morgan continues to address the needs and challenges of the modern urban environment.

0:20.0

With a four-year quadrupling of research, more than a dozen new doctoral programs,

0:25.7

and eight new National Centers of Excellence,

0:28.5

Morgan is positioned to achieve Carnegie R-1 designation in the next five years.

0:33.7

To learn more about Morgan and their ascension to R1, visit morgan.edu slash research.

0:44.4

Welcome to the science podcast for August 24, 2018. I'm Sarah Crespi. In this week's show, Deputy News Editor Eric Hayond talks about the possibility

0:55.5

of sending CubeSats. These are briefcase-sized satellites on interplanetary missions, and the

1:02.2

technology needed to make that happen. And also this week, our new producer, Megan Cantwell,

1:07.5

makes her debut on the podcast. She talks with Brad Eudal and Quentin Grafton about the irrigation efficiency paradox.

1:14.7

This is this inescapable fact that when farms increase their irrigation efficiency,

1:19.9

they still seem to use the same amount of water.

1:22.5

What is causing this and what can be done to better conserve water in a warming world?

1:29.0

Now we have Eric Han, Deputy News Editor for Science.

1:32.5

He's here with a story on CubeSats, these very small satellites that have been used mostly

1:39.0

to look back at the Earth once they're launched into space, but now they're going to go

1:43.8

where no CubeSat has gone

1:45.9

before. Hi, Eric. Hi, Sarah. So let's start with what a CubeSat is. CubSat is just a term for a small

1:54.4

satellite. It's a class of small satellites made from little cubes, 10 centimeters on a side. They've been standardized. You can buy all

2:03.3

sorts of important satellite parts that fit into these cubes. And so it's almost modular.

...

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