Marble/C3/Satellites-and-Eclipses/English-timed
From Script | Spoken-Tutorial
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| 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. |
