1 00:00:00,350 --> 00:00:04,360 In order to put a snow satellite into space, 2 00:00:04,380 --> 00:00:09,580 you need to test the instruments from a plane first. 3 00:00:09,600 --> 00:00:12,730 SnowEx is a five-year NASA airborne campaign to 4 00:00:12,750 --> 00:00:15,400 work towards a future snow satellite mission 5 00:00:15,420 --> 00:00:19,870 and we need to find out what sorts of remote-sensing techniques 6 00:00:19,890 --> 00:00:22,580 will work best for different kinds of snow. 7 00:00:22,600 --> 00:00:26,940 The only way to find that out is to actually take a bunch of different types of sensors, 8 00:00:26,960 --> 00:00:28,440 put them on an airplane, 9 00:00:28,460 --> 00:00:31,590 fly them out in the field under real snow conditions, 10 00:00:31,610 --> 00:00:33,440 and that's exactly what we're doing. 11 00:00:33,460 --> 00:00:36,460 What plane is being used? 12 00:00:36,480 --> 00:00:38,920 The P-3. It's an old military plane. 13 00:00:38,940 --> 00:00:45,790 The military planes are loud, and vibrate, and they're cold. 14 00:00:45,810 --> 00:00:50,310 Think of a commercial airplane. Take all the insides out. 15 00:00:50,330 --> 00:00:52,670 What you have there, what every plane will have, 16 00:00:52,690 --> 00:00:55,660 it’s what’s called seat rails. We use these. 17 00:00:55,680 --> 00:00:57,830 We build our instruments in, what we call, data racks. 18 00:00:57,850 --> 00:00:59,490 That's how we control the instrument. 19 00:00:59,510 --> 00:01:04,460 We will build our racks in such a way that they also attach on to these seat rails. 20 00:01:04,480 --> 00:01:07,260 How else is the plane different? 21 00:01:07,280 --> 00:01:09,780 So the walls of this aircraft, I find pretty interesting. 22 00:01:09,800 --> 00:01:11,650 They’re not solid like on your commercial. 23 00:01:11,670 --> 00:01:15,430 It’s like a piece of cloth you can actually remove and run wires, 24 00:01:15,450 --> 00:01:18,300 and run different instrument things and make it a lot easier to 25 00:01:18,320 --> 00:01:21,430 modify where your things are on the aircraft. 26 00:01:21,450 --> 00:01:25,330 How do you check that the instruments are measuring snow accurately? 27 00:01:25,350 --> 00:01:28,500 We have a lot of people on the ground collecting science data 28 00:01:28,520 --> 00:01:32,820 and they’re doing that to compare what we’re seeing with our instruments. 29 00:01:32,840 --> 00:01:35,760 It's a data comparison type deal. 30 00:01:35,780 --> 00:01:40,420 These flight lines are planned so that we specifically fly over 31 00:01:40,440 --> 00:01:43,380 wherever the ground truth people are with their instruments 32 00:01:43,400 --> 00:01:44,980 and taking their experiments. 33 00:01:45,000 --> 00:01:46,150 34 00:01:46,170 --> 00:01:49,080 What is the flight like? 35 00:01:49,100 --> 00:01:51,060 So flying on the P-3 is really bumpy. 36 00:01:51,080 --> 00:01:54,110 We do a lot of maneuvers that you would never do on a commercial jet. 37 00:01:54,130 --> 00:01:57,610 High bank angles, sharp turns, really low flying. 38 00:01:57,630 --> 00:01:59,590 The lower you are, the more turbulent it is. 39 00:01:59,610 --> 00:02:03,060 What are you doing on the flight? 40 00:02:03,080 --> 00:02:03,780 So when I’m on a science flight, 41 00:02:03,800 --> 00:02:05,810 I’m checking to make sure the instrument's still running 42 00:02:05,830 --> 00:02:08,000 and taking data the way I want it to. 43 00:02:08,020 --> 00:02:10,220 Everyone's very focused on their instrument. 44 00:02:10,240 --> 00:02:13,860 You're constantly checking to make sure that the data's coming in. 45 00:02:13,880 --> 00:02:17,670 My job is to make sure all the instrument operators are looking at their instruments 46 00:02:17,690 --> 00:02:21,780 and that they’re collecting all the adequate data they need. 47 00:02:21,800 --> 00:02:24,750 What is the goal for the first year? 48 00:02:24,770 --> 00:02:27,380 The best thing that we can get out of SnowEx this year one 49 00:02:27,400 --> 00:02:31,730 is really to collect a multi-sensor data set over a wide range of conditions. 50 00:02:31,750 --> 00:02:36,440 These SnowEx science flights are the combinations of two plus years of work. 51 00:02:36,460 --> 00:02:40,000 It’s really exciting to be a part of something so big. 52 00:02:40,020 --> 00:02:58,658