0:00:05.400,0:00:07.960
Hello and welcome to this tutorial video.

0:00:08.600,0:00:12.637
In this video I will show you how to find synthetic aperture ...

0:00:12.637,0:00:14.119
radar or SAR imagery.

0:00:14.680,0:00:18.272
I will also go over how to view the spatial extent of a SAR ...

0:00:18.272,0:00:19.599
image. Let's begin.

0:00:21.960,0:00:23.920
First we will turn off the default layer.

0:00:24.520,0:00:27.720
Click on the trash can icon in the upper right-hand side.

0:00:28.360,0:00:30.120
This will clear all current layers.

0:00:33.320,0:00:36.560
We will also close the legend and intro tabs.

0:00:40.360,0:00:42.463
Second, we will select a desired ...

0:00:42.463,0:00:45.034
region. In this example I will select an ...

0:00:45.034,0:00:46.358
area around Hawaii.

0:00:47.040,0:00:50.330
This region is where the Sentinel 1 satellite has made ...

0:00:50.330,0:00:51.719
a passing on July 19th.

0:00:52.240,0:00:54.680
It should have some SAR imagery for us to see.

0:00:55.560,0:00:57.200
Use the plus button to zoom in.

0:01:05.640,0:01:08.560
We will go ahead and set the date to July 19th.

0:01:09.280,0:01:13.120
Click on L1/L2 spatial search.

0:01:22.560,0:01:24.640
Click on the 5th option from the top.

0:01:25.160,0:01:28.560
S-1A/B NRCS

0:01:33.000,0:01:37.800
Then we will click on polygon and draw a rectangle around Hawaii.

0:01:48.080,0:01:50.120
Next click on search results.

0:01:50.800,0:01:53.539
You might have to close the date/calendar panel to reach ...

0:01:53.539,0:01:54.879
the search results button.

0:02:00.840,0:02:03.843
Click on search results and then on the right hand side of ...

0:02:03.843,0:02:06.079
the screen open the search results panel.

0:02:13.680,0:02:18.600
Click on show spatial extent to view the spatial extent of the image.

0:02:26.400,0:02:29.320
Lastly click on a thumbnail to view the SAR image.

0:02:35.960,0:02:39.287
This SAR image shows the surface roughness of the ...

0:02:39.287,0:02:41.559
water around 2 Hawaiian Islands.

0:02:43.520,0:02:47.840
Here we see an example of island shadowing behind the islands.

0:02:48.760,0:02:53.480
With the wind blowing toward the West the islands act as a wind blockade

0:02:54.080,0:02:55.600
creating wind shadows.

0:02:56.840,0:03:01.080
These areas behind the islands have little wind and appear black

0:03:01.640,0:03:04.080
because the surface is calm and smooth.

0:03:07.560,0:03:10.200
These features are known as wind Shadows.

0:03:15.200,0:03:18.613
In the next example we will look at us our image from the ...

0:03:18.613,0:03:19.599
Gulf of Mexico.

0:03:20.680,0:03:24.960
First we will click reset on the L1/L2 spatial search.

0:03:29.040,0:03:32.938
S we will select a new region this time we will look at the ...

0:03:32.938,0:03:34.039
Gulf of Mexico.

0:03:35.560,0:03:37.080
Press the minus the zoom out.

0:03:46.120,0:03:49.160
We will go ahead and set the date to July 17th.

0:04:03.360,0:04:08.080
Next we will click on polygon and draw a rectangle around the region.

0:04:18.680,0:04:20.720
Then click on the search results button.

0:04:30.320,0:04:34.280
Click on show spatial extent to view where the image was taken.

0:04:40.360,0:04:43.360
Lastly click on a thumbnail to view the SAR image.

0:04:51.040,0:04:55.353
This SAR image shows oil seeps and oil platforms in the ...

0:04:55.353,0:04:56.599
Gulf of Mexico.

0:04:59.040,0:05:03.008
The lower half of this image shows oil on the surface from ...

0:05:03.008,0:05:04.359
natural oil seeps.

0:05:10.760,0:05:14.231
These spots appear black because the oil dampens the ...

0:05:14.231,0:05:16.519
water and makes it smooth and flat.

0:05:21.240,0:05:24.280
If you zoom in you can see small white points.

0:05:25.200,0:05:27.960
These are shipping vessels and oil platforms.

0:05:37.640,0:05:41.267
The long black streaks in the upper half of the image are ...

0:05:41.267,0:05:45.999
natural surfactants and are created by microbes that live in the ocean.

0:05:56.560,0:06:00.189
In this last example we will look at mesoscale convection ...

0:06:00.189,0:06:02.079
cells north of the Caribbean.

0:06:03.080,0:06:04.920
We will go ahead and click reset

0:06:05.680,0:06:07.240
and move to the Caribbean Sea.

0:06:14.880,0:06:17.200
We will set the date to July 16th.

0:06:24.560,0:06:27.640
And draw a rectangle around the desired region.

0:06:36.400,0:06:38.600
Next will click on search results.

0:06:49.800,0:06:54.080
Now we can show the spatial extent and view the SAR image.

0:07:04.720,0:07:08.080
This SAR image shows mesoscale convection cells ...

0:07:08.080,0:07:09.719
north of the Caribbean.

0:07:10.720,0:07:14.440
These large convection cells look like craters in the image.

0:07:20.000,0:07:23.560
They are formed when the cold air mixes with warm air.

0:07:24.120,0:07:28.297
The dense cold air sinks and the warm air rises creating ...

0:07:28.297,0:07:30.839
the convection cells we see here.

0:07:38.880,0:07:42.427
SAR images like this one can synthetically produce ...

0:07:42.427,0:07:46.799
high-resolution images in any weather condition day or night.

0:07:47.960,0:07:51.394
And help oceanographers monitor and study the ocean ...

0:07:51.394,0:07:52.799
and coastal regions.

0:07:54.080,0:07:56.360
Thank you for watching this tutorial video.