WEBVTT FILE 1 00:00:00.040 --> 00:00:04.060 [music] 2 00:00:04.080 --> 00:00:08.120 [music] 3 00:00:08.140 --> 00:00:12.240 Joe: The weather here is very unique in that we have all these different types of precipitation 4 00:00:12.260 --> 00:00:16.390 occurring in the same spot and the underlying factor behind all of it is 5 00:00:16.410 --> 00:00:20.420 rain, rain, rain. It's one storm system after another comes in from the 6 00:00:20.440 --> 00:00:24.610 coast, and the rainfall just piles up. Patrick: Really what we're looking at here 7 00:00:24.630 --> 00:00:28.740 are these big midlatitude frontal systems that make landfall 8 00:00:28.760 --> 00:00:32.930 onto the Olympic Peninsula and how these systems kind of go 9 00:00:32.950 --> 00:00:36.930 from the ocean onto the land and hit the mountains and start really 10 00:00:36.950 --> 00:00:40.980 growing vertically and where some really intense convection 11 00:00:41.000 --> 00:00:45.030 and rainfall can occur. So ground validation basically helps us understand 12 00:00:45.050 --> 00:00:49.040 how well the satellite is seeing precipitation. Patrick: So what we're trying 13 00:00:49.060 --> 00:00:53.090 to do with GPM is kind of build a three dimensional view of 14 00:00:53.110 --> 00:00:57.240 precipitating clouds. And so in order to do that we need 15 00:00:57.260 --> 00:01:01.260 measurements that are directly on the ground and then we need measurements 16 00:01:01.280 --> 00:01:05.310 of the cloud and then measurements kind of looking from different perspectives of the cloud. 17 00:01:05.330 --> 00:01:09.390 David: NASA will be providing two aircraft, the DC-8, 18 00:01:09.410 --> 00:01:13.460 which will be flying at mid-levels, 39,000 feet or so, and 19 00:01:13.480 --> 00:01:17.640 then the ER-2 aircraft, which flies much higher above the clouds. 20 00:01:17.660 --> 00:01:21.710 On the ground the main assets are the NASA Polarmetric Radar, is where 21 00:01:21.730 --> 00:01:25.780 we are now, along with the D3R radar, which is a dual-frequency, dual- 22 00:01:25.800 --> 00:01:29.940 polarization radar that has the same frequencies as the GPM satellite 23 00:01:29.960 --> 00:01:34.110 Well we're quite remote, which is fine, but he hardest part actually 24 00:01:34.130 --> 00:01:38.250 for my group was to acquire land on the Quinault Indian 25 00:01:38.270 --> 00:01:42.320 Nation Territory. There was a lot of--we needed to make sure we 26 00:01:42.340 --> 00:01:46.390 were doing the right thing environmentally, get all the right permits. We worked very closely with the 27 00:01:46.410 --> 00:01:50.480 Quinault Indian Nation, they were wonderful. Then once we got all the regular permits, 28 00:01:50.500 --> 00:01:54.520 we had to then kind of cap the top of the mountain to support our radar 29 00:01:54.540 --> 00:01:58.730 which requires about 1500 pounds per square foot for it to be set on 30 00:01:58.750 --> 00:02:02.780 stable. Patrick: some of my colleauges 31 00:02:02.800 --> 00:02:06.930 actually had to hike in and put instruments in or go maintain instruments 32 00:02:06.950 --> 00:02:11.010 you know, 14-mile journeys into the woods basically. It's really neat 33 00:02:11.030 --> 00:02:15.040 to get to work in such a unique environment like that 34 00:02:15.060 --> 00:02:19.150 where you can actually put these instruments in places where there's never been measurements 35 00:02:19.170 --> 00:02:23.330 like that before. Matt: You know we have sites all the way on the 36 00:02:23.350 --> 00:02:27.380 coast, they're going to see probably 6 inches of rain for the season. We're going to have some 37 00:02:27.400 --> 00:02:31.430 sites that are going to be up in the mountains that are going to see a couple of feet of rain for 38 00:02:31.450 --> 00:02:35.460 the season, and we also have instruments sitting around 5000 feet that are going to see probably 39 00:02:35.480 --> 00:02:39.650 a few feet of snow. So we're going to see quite a breadth of precipitation for 40 00:02:39.670 --> 00:02:43.700 this project. [music] 41 00:02:43.720 --> 00:02:47.740 [music] 42 00:02:47.760 --> 00:02:51.770 [music] 43 00:02:51.790 --> 00:02:53.136