WEBVTT FILE 1 00:00:00.010 --> 00:00:04.010 [plane sounds] My name is Rachael Kroodsma, I'm with 2 00:00:04.030 --> 00:00:08.040 the NASA Goddard Space Flight Center and I am instrument scientist for 3 00:00:08.060 --> 00:00:12.060 CoSMIR. CoSMIR has very similar 4 00:00:12.080 --> 00:00:16.170 frequencies to what GMI, the microwave radiometer 5 00:00:16.190 --> 00:00:20.180 on GPM has. And so by flying CoSMIR on 6 00:00:20.200 --> 00:00:24.290 the DC-8 and especially doing underflights with GPM 7 00:00:24.310 --> 00:00:28.470 passes over us, we'll be able to relate 8 00:00:28.490 --> 00:00:32.640 the measurements we see from CoSMIR with GMI, and 9 00:00:32.660 --> 00:00:36.820 by that way we can validate the measurements. What a radiometer 10 00:00:36.840 --> 00:00:40.890 does is that it measures the radiation that's naturally emitted from 11 00:00:40.910 --> 00:00:44.910 the Earth. In this case we're measuring the rain and snow, so 12 00:00:44.930 --> 00:00:48.990 there's radiation that's naturally emitted from the rain and the snow in the microwave 13 00:00:49.010 --> 00:00:53.020 spectrum, and so this is a microwave radiometer and it's measuring that 14 00:00:53.040 --> 00:00:57.050 radiation. My expertise is with microwave radiometer calibration. 15 00:00:57.070 --> 00:01:01.090 And so I do a lot of data analysis, 16 00:01:01.110 --> 00:01:05.120 checking out calibration of microwave radiometers. 17 00:01:05.140 --> 00:01:09.150 [laughs] I just think it's pretty cool to be 18 00:01:09.170 --> 00:01:13.200 part of the instruments and to be out in the field and just see 19 00:01:13.220 --> 00:01:17.240 how everything works and how it all comes 20 00:01:17.260 --> 00:01:21.270 together and be a part of that. [music] 21 00:01:21.290 --> 00:01:25.340 [music] 22 00:01:25.360 --> 00:01:28.151 [music]