WEBVTT FILE 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