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Created page with "{|border=1 | <center>'''Time'''</center> | <center>'''Narration'''</center> |- || 00:01 || Welcome to this Spoken Tutorial on '''Satellites and Eclipses'''. |- || 00:06 ||..."

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{|border=1
| <center>'''Time'''</center>
| <center>'''Narration'''</center>

|-
|| 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 the'''Configure''' button corresponding to '''Satellites plugin.'''
|-
|| 05:34
|| '''Satellites Configuration Marble –Marble Virtual Globe''' window opens.

|-
|| 05:40
|| Click on the'''Activate 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 the'''OK''' in the window.
|-
|| 06:24
|| Click on the'''OK''' 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 to'''View''' menu and select'''Browse Eclipses'''.

|-
|| 10:09
|| Click on'''Settings''' 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
|| The'''Spoken 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.
|-
|}

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

PoojaMoolya: Created page with "{|border=1 | '''Time''' | '''Narration''' |- || 00:01 || Welcome to this Spoken Tutorial on '''Satellites and Eclipses'''. |- || 00:06 ||..."