WEBVTT FILE ﻿1 00:00:00.300 --> 00:00:03.133 If you want to make a spacecraft, you've got to break a few eggs. 2 00:00:03.633 --> 00:00:05.100 No, that's not right. 3 00:00:05.100 --> 00:00:07.400 You've got to bake for a few days. 4 00:00:07.400 --> 00:00:11.233 That's it. So follow along for our recipe for homemade satellite. 5 00:00:11.833 --> 00:00:14.200 First up, collect your ingredients. 6 00:00:14.200 --> 00:00:16.966 We're making an ocean, land, and atmosphere monitoring satellite 7 00:00:16.966 --> 00:00:20.566 called PACE. So we'll gather two polarimeters, which measure 8 00:00:20.566 --> 00:00:21.933 the polarization state of light 9 00:00:21.933 --> 00:00:24.233 as it travels through water and atmospheric aerosols. 10 00:00:24.566 --> 00:00:27.566 And one Ocean Color Instrument, which will measure light reflected 11 00:00:27.566 --> 00:00:31.300 from the ocean surface to study tiny ocean creatures called phytoplankton, 12 00:00:31.566 --> 00:00:33.900 as well as atmospheric properties above the ocean. 13 00:00:35.300 --> 00:00:38.700 Wrap these individual components in special spacecraft foil. 14 00:00:38.700 --> 00:00:42.766 These blankets for satellites help keep the instruments that need to be hot, hot, 15 00:00:43.100 --> 00:00:46.033 and those that need to be cold, cold while they're in space. 16 00:00:46.433 --> 00:00:48.500 We make them special right here at Goddard. 17 00:00:49.766 --> 00:00:52.900 Place the instruments in the Thermal Vacuum Chamber or TVAC. 18 00:00:53.400 --> 00:00:56.600 This chamber mimics some of the extremes the satellite will experience. 19 00:00:57.066 --> 00:01:00.433 Space can be very cold, but sunlight can heat the spacecraft up. 20 00:01:00.833 --> 00:01:03.966 This test ensures the spacecraft and its instruments will handle both. 21 00:01:04.400 --> 00:01:07.100 It also creates a vacuum, like the vacuum of space, 22 00:01:07.366 --> 00:01:09.666 to make sure the satellite can withstand those pressures. 23 00:01:10.333 --> 00:01:12.333 We'll bake the satellite components at a variety 24 00:01:12.333 --> 00:01:14.366 of temperatures and pressures for several days. 25 00:01:14.766 --> 00:01:17.400 When your timer goes off, remove PACE from TVAC. 26 00:01:18.733 --> 00:01:21.766 It's time for the last step of building a spacecraft: Assembly! 27 00:01:22.100 --> 00:01:25.866 We'll install PACE's instruments to get ready for launch in 2024 28 00:01:25.866 --> 00:01:28.766 and a new view of our home planet's ocean and atmosphere.