Marble/C3/Satellites-and-Eclipses/English-timed

Time	Narration
00:01	Welcome to this Spoken Tutorial on Satellites and Eclipses.
00:06	In this tutorial we will learn about,
00:09	Satellites
00:11	Eclipses
00:13	Configure satellites and eclipses
00:17	To record this tutorial, I am using, Ubuntu Linux OS, version 16.04
00:25	Marble version 1.12.20 and
00:30	A working Internet connection.
00:32	The process demonstrated in this tutorial is identical in, Ubuntu Linux OS, version 18.04, Marble version 2.2.20
00:47	To practise this tutorial, learner should be familiar with Marble interface.
00:53	For the prerequisite Marble tutorials, please visit this site.
00:58	We will begin with satellites.
01:01	A satellite is an object in space that orbits around a bigger object.
01:07	An orbit is a regular, repeating path that an object takes around another object.
01:14	I have opened the Marble interface in the default Atlas view.
01:19	I will hide overview map, compass and scale bar plugins.
01:26	I will drag and place the windrose at a convenient location.
01:32	I will disable the view of stars for clarity.
01:36	Go to View menu and click on Stars option.
01:40	Again go to View menu and select Online Services.
01:45	From the sub-menu select Satellites option.
01:49	Observe that a number of satellites appear on the interface.
01:54	Satellites will appear only if you are connected to the internet.
01:59	Let us rotate the globe to see different satellites.
02:03	Each satellite has pivoted on the globe based on its coordinates.
02:08	I will locate one of the satellites and click on it.
02:12	You may locate any one of the satellites.
02:16	A context menu opens.
02:19	From the context menu select the name of the satellite.
02:23	Satellite information sheet opens.
02:27	The satellite’s name and NORAD ID are shown at the top of the sheet.
02:33	Next we have Coordinates table.
02:36	This table shows information about Longitude, Latitude and Altitude of the satellite.
02:47	Information sheet has a scroll-bar to scroll to the bottom of the sheet.
02:53	Below the table Geometry of a satellite orbit is shown.
02:59	Next we have Orbital Data.
03:02	It shows Perigee, Apogee, Inclination, Period and Semi major axis.
03:15	Let us close this information sheet.
03:19	Again click on the satellite.
03:22	From the context menu select Display orbit option.
03:27	Orbit of the satellite appears on the globe.
03:31	I will rotate the globe to show the orbit.
03:40	Now let us hide the orbit.
03:43	Again click on the satellite.
03:46	From the context menu un-check Display orbit option.
03:51	Let us mark the location of the satellite.
03:55	Click on the satellite.
03:57	From the context menu select Keep centred option.
04:02	Position of the satellite is shown by a position tracking arrow.
04:07	To disable the position tracking, click on Location panel.
04:12	In the panel, click on the drop-down button below Position Tracking.
04:17	Select Disabled option.
04:22	Now we will find a particular satellite, Insat 3D.
04:27	Go to the Search panel.
04:30	Type Insat 3D in the search box and press Enter.
04:35	Notice that a cross hair appears on the location of Insat 3D on the globe.
04:42	As an assignment, Explore more about different satellites of the Earth.
04:49	Let us disable all the satellites.
04:53	Go to View menu and select Online Services option.
04:59	From the sub menu click on Satellites option.
05:03	All satellites have disappeared from the interface.
05:07	Now let's configure satellites plugin.
05:11	Go to Settings menu and click on Configure Marble Virtual Globe option.
05:17	Configure window opens.
05:20	From the window, select Plugins tab.
05:24	Let us scroll down to the bottom and locate Satellites plugin.
05:29	Click on theConfigure button corresponding to Satellites plugin.
05:34	Satellites Configuration Marble –Marble Virtual Globe window opens.
05:40	Click on theActivate Plugin button in the window.
05:44	Satellites Configuration is activated.
5:48	This window has two tabs. Satellites and Data sources.
05:54	Satellites tab has opened by default.
05:58	Under Earth we have different sections and sub-sections.
06:03	Notice that all the satellites are selected by default.
06:08	I will click on Reset button available at the bottom left corner of the window.
06:14	This will un-check all the satellite check-boxes except the 100(or so) Brightest.
06:21	Click on theOK in the window.
06:24	Click on theOK button in the Configure window.
06:28	Observe that you will see only the 100(or so) Brightest satellites.
06:34	Now we see the satellites of Mars.
06:38	Go to File menu and select Download Maps.
06:42	Marble- Install Maps – Marble Virtual Globe dialog box opens. Scroll down the box.
06:51	Select Mars Topography.
06:54	Click on Install button to install it.
06:59	Click on Close to the close the dialog box.
07:03	Go to the Map View panel.
07:06	Click on Earth drop-down button and select Mars.
07:11	We can see the satellites of Mars.
07:15	I will rotate the globe to see the satellites of Mars.
07:30	As an assignment, Download Venus Topography map
07:35	Find the Venus Express satellite of Venus
07:39	Open its information data sheet
07:43	Display its orbit and Track its position
07:50	Go to Mapview panel, click on the Mars drop-down button and select Earth.
07:56	Let us disable the satellites.
07:59	Go to View menu and select Online services. From the sub menu select Satellites option.
08:07	Now let us learn about Eclipses.
08:11	An eclipse occurs, when an astronomical object or spacecraft is temporarily obscured, by passing into the shadow of another object.
08:21	Let us now see the eclipses formed in various parts of the world.
08:26	Go to View menu and select Eclipses.
08:30	Again Go to View menu and select Browse Eclipses.
08:35	Eclipse Browser – Marble Virtual Globe window opens.
08:40	Window has a table with the following columns. Start, End, Type and Magnitude.
08:49	Drag the column separator to see the information clearly.
08:55	Observe that only solar eclipses for the year are shown in the table.
09:01	Show eclipses for year: text box, has a plus and minus button.
09:07	By default year 2020 is shown.
09:11	Click on the button to see eclipses in the corresponding years.
09:17	Table shows two solar eclipses that occurred in the year 2020.
09:24	Select the first eclipse and click on Go To Selected Eclipse button.
09:31	The places of the world where eclipse was seen are shown as shaded parts.
09:37	Similarly we can see the second eclipse.
09:41	Go to View menu and select Browse Eclipses.
09:46	In the window select 2nd eclipse and click on Go To Selected Eclipse button.
09:53	Here we can see the shaded parts where eclipse was seen.
09:58	To hide the shaded parts click on View menu and select Eclipses.
10:04	Again go toView menu and selectBrowse Eclipses.
10:09	Click onSettings button at the top right corner of the window
10:14	Eclipses Configuration window opens.
10:18	Window has View and Remainder tabs.
10:22	View tab is selected by default.
10:25	In the View Options section, click on Enable Lunar Eclipses check-box.
10:31	Leave the other check-boxes as default.
10:35	Click on OK button.
10:38	Observe that of lunar eclipses are added to the table.
10:43	In this version of Marble only solar eclipses can be shown as shaded regions.
10:50	As an assignment, Using Show eclipses for year: text box change the years to 2018 and 2019.
11:00	Observe the solar eclipses in these years.
11:04	Let us summarize.
11:07	In this tutorial we have, learnt about, Satellites, Eclipses, Configure satellites and eclipses
11:16	The video at the following link summarizes the Spoken Tutorial project. Please download and watch it.
11:23	TheSpoken Tutorial Project team: conducts workshops and gives certificates. For more details, please write to us.
11:32	Please post your timed queries in this forum.
11:36	Spoken Tutorial Project is funded by, MHRD, Government of India.
11:42	This tutorial is contributed by Viji Nair and Madhuri Ganapathi from IIT Bombay. Thank you for watching.

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PoojaMoolya