WEBVTT 00:03.000 --> 00:08.080 ATLO is an acronym, it stands for assembly, test and launch operations. 00:09.000 --> 00:12.080 Basically we'll assemble it, and we'll do all the system level testing, 00:13.000 --> 00:17.080 we'll do all the environmental testing, we'll do all the launch processing and then we will go ahead and launch it. 00:18.000 --> 00:21.080 So, in ATLO, you basically start with a bunch of pieces. 00:22.000 --> 00:29.080 We had what was known as the prop module -- that's the large base piece of the structure. On top of the prop module sits the vault. 00:30.000 --> 00:34.080 Individual boxes, flight computers, our power subsystem, all came in separate pieces. 00:35.000 --> 00:41.080 In ATLO, our job is to take all those pieces and come up with a plan and strategy of putting them all together in an organized manner that makes sense. 00:42.000 --> 00:48.080 We have a philosophy at Lockheed Martin to test as you fly. 00:49.000 --> 00:54.080 We have to try to replicate the environment that the spacecraft is going to see in space. 00:55.000 --> 00:59.080 So we basically trick it, through another piece of software, into thinking that it's flying 01:00.000 --> 01:04.080 and so we run through all these scenarios, just like in flight, and we verify that it functionally does what its supposed to do. 01:05.000 --> 01:16.080 So in order to accurately represent all different environments that the spacecraft is exposed to, we need to kind of break up the test individually. 01:17.000 --> 01:23.080 One of the more exciting tests that we got to run on the spacecraft was the solar array deployment test. 01:24.000 --> 01:32.080 We have very large solar arrays on this spacecraft so that once we get to Jupiter, we have enough electricity to operate the spacecraft. 01:33.000 --> 01:44.080 In order to be able to deploy them with low friction, we use a flat floor and a pneumatic device that's kind of like a hovercraft. 01:45.000 --> 01:53.080 A thermal vacuum test is probably the largest, most thorough, complete test that we'll do on a whole entire spacecraft assembly. 01:54.000 --> 02:01.080 So, once we get the spacecraft fully assembled, we will put it in a large chamber that tries to replicate space. 02:02.000 --> 02:11.080 Also within the chamber is a shroud that is filled with liquid nitrogen and it can get as cold as negative 180 degrees C. 02:12.000 --> 02:17.080 So, we try to simulate what environment the spacecraft is going to experience in space. 02:18.000 --> 02:21.080 So we get through these major environmental milestones, verify that the spacecraft is working as we planned, 02:22.000 --> 02:25.080 take it out, verify that functioning works after we do all tests 02:26.000 --> 02:28.080 and we prep it to ship down to the launch site. 02:29.000 --> 02:34.080 On launch day, of course, it's a dream to have perfect weather, no clouds in the sky, 02:35.000 --> 02:39.080 but we have to do with what we have. There are weather rules in place, weather criteria that we cannot violate. 02:40.000 --> 02:45.080 There are rules for cumulus clouds, there are rules for anvil weather clouds, there are rules for lightning within the area, 02:46.000 --> 02:51.080 within 10 miles, within 5 nautical miles, so there are several weather rules in place. 02:52.000 --> 02:58.080 Making a list to get through a launch countdown is the only way to get through a launch, 02:59.000 --> 03:05.080 and even once my list is checked off, I still won't throw it away, because I want to go back and double and triple check to make sure that I did everything on that list. 03:06.000 --> 03:12.080 As soon as we get the go ahead from ULA, we will power up the spacecraft for the final time. We make our spacecraft dirt simple, 03:13.000 --> 03:21.080 so that at the end, there's very few things to go wrong in this very critical time, so our spacecraft is a very easy spacecraft to launch.