Mangalyaan: ISRO's Mars Orbiter Mission

The Technology & Economic Forum is a venue to discuss issues pertaining to Technological and Economic developments in India. We request members to kindly stay within the mandate of this forum and keep their exchanges of views, on a civilised level, however vehemently any disagreement may be felt. All feedback regarding forum usage may be sent to the moderators using the Feedback Form or by clicking the Report Post Icon in any objectionable post for proper action. Please note that the views expressed by the Members and Moderators on these discussion boards are that of the individuals only and do not reflect the official policy or view of the Bharat-Rakshak.com Website. Copyright Violation is strictly prohibited and may result in revocation of your posting rights - please read the FAQ for full details. Users must also abide by the Forum Guidelines at all times.
Varoon Shekhar
BRF Oldie
Posts: 2178
Joined: 03 Jan 2010 23:26

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Varoon Shekhar »

^
Thanks prasannasimha! Nice graphics and info. As good as the ISRO facebook page is, and prompt and accurate as their responses to general queries from the public are, there is an irritating absence of detail on a day-to-day basis. Laymen( particulary this layman ;-)) want to know: the distance that MOM has travelled so far, updated every day, even twice a day;
the distance of MOM from the earth; the distance from the Sun; the distance remaining to reach Mars. This is hardly esoteric information, it's something the public can understand, relate to, and be excited about.
member_28108
BRFite
Posts: 1852
Joined: 11 Aug 2016 06:14

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by member_28108 »

Varoon,I don't know if any space agency gives continuous information.Most of the so called "real time" sites are just giving extrapolated data.There have been requests for a count down clock of some sort(They had put one for the launch).
At least now we are getting some information. Previously even this was not there so it is indeed an improvement. I suspect that they have deputed one interested scientist to write on their facebook page so he may be posting whenever he can.

Problem now is that it is a 300 day trip so they may only give updates during a trajectory correction maneuver.
This is an example of extrapolated data

http://www.sankara.net/mom.html
putnanja
BRF Oldie
Posts: 4665
Joined: 26 Mar 2002 12:31
Location: searching for the next al-qaida #3

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by putnanja »

Mars Orbiter spent 55% of the total fuel so far: ISRO scientist
...
"We have already spent 470 kilogram of the bio-propellant we are carrying. However, we have not overspent,despite the glitch that we encountered during the fourth burn (while circling the earth. We are well within the nominal limit of spending," said AS Kiran Kumar, a senior scientist working on the Mars Orbiter Mission (MOM) and the director of city-based Space Application Centre (SAC), an arm of ISRO.
...
The senior ISRO scientist said that indigenously developed Ceramic Servo Accelerometer (CSA) that measures the precise amount of velocity the satellite gains when the thrusters are burnt have "enabled in preserving the fuel on-board." This CSA on the MOM is an improved version of the one deployed during the Chandrayaan Mission.
...
...
Kakarat
BRF Oldie
Posts: 2225
Joined: 26 Jan 2005 13:59

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Kakarat »

VSSC Chief Hints at Second Mars Mission Using GSLV

...
“The project is not yet approved. But we are planning a second mission to Mars with a more powerful launch vehicle in two years. The GSLV will be ready by then and also the GSLV Mk-III version,” he said. The second mission, unlike the first, will have a lander. The final clearance to the mega project will depend on the feedback received from the Mars Orbiter Mission (MOM) which is on its way to the Red Planet at present, he said. ISRO had to be satisfied with a modest payload on MOM as it had to depend on the Polar Satellite Launch Vehicle (PSLV) for the mission’s launch. A prototype of the crew capsule that will be used for ISRO’s future manned space flight will be tested aboard the GSLV Mk-III, the heftiest rocket to be built in the country, before April 2014, he said.
...
SSSalvi
BRFite
Posts: 785
Joined: 23 Jan 2007 19:35
Location: Hyderabad

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by SSSalvi »

A Datewise chart showing how far is MOM ( in Million Kms ) is reproduced here from http://indiaspaceactivity.blogspot.in/2 ... ssion.html.


Image
Varoon Shekhar
BRF Oldie
Posts: 2178
Joined: 03 Jan 2010 23:26

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Varoon Shekhar »

From ISRO's facebook site, a posting :

SkyLark: "While MOM's distance from earth is now 11.04 million km, it has actually traveled more than 120 million km."

So the distance between Earth and Mars seems to be fluctuating since their orbits are not 'even' with one another(?).

But the total distance travelled in the heliocentric orbit is an amazing 120 million km!
SaiK
BRF Oldie
Posts: 36424
Joined: 29 Oct 2003 12:31
Location: NowHere

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by SaiK »

I hope we can seriously work on a nuke engine.

like:
http://www.energy.gov/ne/nuclear-reacto ... er-systems
member_28108
BRFite
Posts: 1852
Joined: 11 Aug 2016 06:14

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by member_28108 »

Varoon the paths are two ellipses so the distance fluctuates.If you see SSalvi's diagram you can see the sudden spurt in distance after April 2012 - this is because we would have crossed the perigee points of the two orbital paths (earth and mars) so there will now be a huge difference accumulating though the speed of the probes will remain constant.
member_28108
BRFite
Posts: 1852
Joined: 11 Aug 2016 06:14

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by member_28108 »

Saik we need the RTG's to power systems when sunlight is insufficent to activate the solar panels or when there is a along period of "night" that cannot be compensated by on board batteries.Of course we need to work on this but with our current missions it would not be needed.When we plan things to the big gas giants and beyond we will definitely need them. It should not be a big problem for our nuclear industry to produce them if needed.
One problem is the potential radioactive pollution that can occur if the space craft carrying an RTG fails and explodes.This has caused a lot of demonstrations even in the US related to accidents with radioactive materials in rocketry.

http://en.wikipedia.org/wiki/Radioisoto ... _generator
member_28108
BRFite
Posts: 1852
Joined: 11 Aug 2016 06:14

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by member_28108 »

Image

Image
SSSalvi
BRFite
Posts: 785
Joined: 23 Jan 2007 19:35
Location: Hyderabad

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by SSSalvi »

Added a figure explaining the difference in ' Distance between Earth and MOM' and ' Distance travelled by MOM ' towrds the end in my blog http://indiaspaceactivity.blogspot.in/2 ... .html#more
SSSalvi
BRFite
Posts: 785
Joined: 23 Jan 2007 19:35
Location: Hyderabad

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by SSSalvi »

A good figure about distances.. from https://www.facebook.com/isromom by Skylark More

Image
Jayram
BRFite
Posts: 362
Joined: 14 Jan 2003 12:31

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Jayram »

http://www.nytimes.com/2014/02/18/busin ... hoofinance

Good Article by Sarita Rai in NYTimes.. Finally some pointed repostes to the poverty before space argument
Amber G.
BRF Oldie
Posts: 9265
Joined: 17 Dec 2002 12:31
Location: Ohio, USA

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Amber G. »

^^^(xpost in other thread) ...For those who criticizes about space programs in " a country starved of even basic necessities like clean drinking water and toilets" and condemn the Mars mission as nothing more than showing off...

Here is a quote from Mr. Narasimha, the aerospace scientist according to NY Times:
If the Mars mission’s $75 million was distributed equally to every Indian, they would be able to buy a cup of roadside chai once every three years,” said Mr. Narasimha, the aerospace scientist, referring to the tea that many Indians drink.

“My guess is that even the poorest Indians will happily forgo their chai to be able to see their country send a rocket all the way to Mars.”
The whole story is quite interesting ..
SSridhar
Forum Moderator
Posts: 25087
Joined: 05 May 2001 11:31
Location: Chennai

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by SSridhar »

Parameters of Mars Orbiter Normal - The Hindu
All health parameters of the Mars Orbiter Mission are normal and a mid-course correction manoeuvre is likely to be carried out in early April, according to S. Arunan, Project Director, Mangalyaan.

“The second of the four trajectory correction manoeuvres will be made, probably on April 9, to make minor changes that may be required owing to the solar radiation pressure on the spacecraft,” he told journalists here on Saturday, on the sidelines of Probe-2014, a symposium at the National Institute of Technology, Tiruchi (NITT).

The mission boasted several new technologies, and the onboard autonomy was an important feature. Since there would be a communication delay in view of the long distance involved, the autonomy enabled the spacecraft to take decisions on its own. This option could be incorporated in the future missions of the ISRO as it would help to cut ground complexities and improve the reliability of satellites, he said.

The success of Mars Orbiter Mission, he said, enhanced the image and brand of the country in space technology. The ISRO proposed to bring India’s science laboratories under a wider umbrella to develop scientific payloads for more elaborate studies and investigations on planets, even possibly for a landing mission.

Later, in a presentation at the symposium, hosted by the Electronics and Communication Engineering Association of the NITT, Mr. Arunan said the Mars Orbiter Mission proved the country’s capabilities in deep space communication, navigation, mission planning and management.
member_28505
BRFite -Trainee
Posts: 1
Joined: 11 Aug 2016 06:14

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by member_28505 »

why the mission duration was fixed at 300 days?
member_28108
BRFite
Posts: 1852
Joined: 11 Aug 2016 06:14

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by member_28108 »

Fuel load etc
member_28452
BRFite -Trainee
Posts: 8
Joined: 11 Aug 2016 06:14

How is the tracking done?

Post by member_28452 »

Sirs, Can some one explain how the MOM is tracked enroute to Mars without any GPS with such precision?Can a star tracker do this?Wouldn't dust/meteor/asteroid/bright light from a star explosion make it difficult to use?
member_28108
BRFite
Posts: 1852
Joined: 11 Aug 2016 06:14

Re: How is the tracking done?

Post by member_28108 »

ray_donovan wrote:Sirs, Can some one explain how the MOM is tracked enroute to Mars without any GPS with such precision?Can a star tracker do this?Wouldn't dust/meteor/asteroid/bright light from a star explosion make it difficult to use?

For ranging etc they use Delta Dor
http://en.wikipedia.org/wiki/Delta-DOR

Also look at the references in the Wiki which gives detailed explanation (Delta Dor is being used in conjunction with NASA and Russian space agencies)

Star tracking etc is also used. Space is less noisy as far as star tracking is concerned comparing to atmospheric perturburations.
rsingh
BRF Oldie
Posts: 4451
Joined: 19 Jan 2005 01:05
Location: Pindi
Contact:

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by rsingh »

Any news about orbit correction yet ? It is 9th April.
Varoon Shekhar
BRF Oldie
Posts: 2178
Joined: 03 Jan 2010 23:26

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Varoon Shekhar »

^
Since Mangalyaan is doing very well and in an excellent trajectory, no course correction at this time was required.

ISRO website http://isro.org/pressrelease/scripts/pr ... Apr09_2014

MOM has travelled half the distance to Mars. Which means it has gone about 340 million km.
SSSalvi
BRFite
Posts: 785
Joined: 23 Jan 2007 19:35
Location: Hyderabad

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by SSSalvi »

cskindia wrote:why the mission duration was fixed at 300 days?
Not 300 days ..

Launch was on 5th Nov 13.
6 orbit raisings were done upto 16 Nov 13
Launched in interplanetary orbit on 1st Dec 13 of 244 days .. MOM will reach Mars around 14 sept 14.

The 244 days are required if we use Solar Gravity alone ( no other active driving force .. thus no fuel is used and mission becomes very efficient ) to traverse the distance between Earth and Mars wherein the spacecraft acts as if it is a solar planet with an orbit of high eccentricity ( 0.2 ) and inclined to Ecliptic @ 2.22 deg.

Of course there are other possibilities also ( NASA's MAVEN is also taking a similar but not same route .. Inclination = 2.02 deg. ). It was launched on 18th Nov ( directly in interplanetary orbit .. no Earth orbits like MOM ) and reach Mars on 22nd Sept 14.

Incidentaly .. the reason why both missions using the same time frame is that 4th April 14 is the shortest distance between Mars and Earth .. next oppertunity for such a situation is 26 months later.
SSSalvi
BRFite
Posts: 785
Joined: 23 Jan 2007 19:35
Location: Hyderabad

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by SSSalvi »

A Trajectory correction is announced:

To be carried out today @ 1630 Hrs.

Firing duration 16 seconds imparting a deltaV of 1.577 m/sec.

Based on Kakarat's post dated 30th Nov ( The 440 N Liquid Engine has commenced its 23 minute long firing for Tran-Mars Injection.

This will impart an incremental velocity of 648 m/s consuming 198 kg of fuel. ) this correction should consume about 2.2 Kgs of fuel.
deejay
Forum Moderator
Posts: 4024
Joined: 11 Aug 2016 06:14

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by deejay »

fingers crossed and a prayer on my lips.
Murugan
BRF Oldie
Posts: 4191
Joined: 03 Oct 2002 11:31
Location: Smoking Piskobidis

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Murugan »

30 minutes ago

Image
Murugan
BRF Oldie
Posts: 4191
Joined: 03 Oct 2002 11:31
Location: Smoking Piskobidis

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Murugan »

Image
Murugan
BRF Oldie
Posts: 4191
Joined: 03 Oct 2002 11:31
Location: Smoking Piskobidis

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Murugan »

ISRO @ISROOFFICIAL · 8s
Yes it’s 4:30 PM now. MOM TCM2 firing should have started-Confirmation awaited from MOM.
Rahul M
Forum Moderator
Posts: 17168
Joined: 17 Aug 2005 21:09
Location: Skies over BRFATA
Contact:

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Rahul M »

@ISROOFFICIAL 4m

A missive from MOM confirms the TCM2-Firing completion as planned. Team MOM is busy crunching numbers to determine the post-TCM2 trajectory.
member_28108
BRFite
Posts: 1852
Joined: 11 Aug 2016 06:14

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by member_28108 »

Mars Orbiter Mission’s second Trajectory Correction Manoeuver completed successfully. Keep Cruising MOM ! pic.twitter.com/tz9g1tXhZq
member_28108
BRFite
Posts: 1852
Joined: 11 Aug 2016 06:14

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by member_28108 »

Image
JE Menon
Forum Moderator
Posts: 7127
Joined: 01 Jan 1970 05:30

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by JE Menon »

MOM India...
Amber G.
BRF Oldie
Posts: 9265
Joined: 17 Dec 2002 12:31
Location: Ohio, USA

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Amber G. »

Mangalyaan to encounter Siding Spring comet in October
The passage of a comet, Siding Spring, will be the first astronomical event that the Indian Mars Orbiter Mission (MOM) spacecraft or 'Mangalyaan'...
The comet that is scheduled to fly past the red planet on October 19 could pose a potential threat to the survival of the orbiter.
"After the spacecraft is captured in the Mars' orbit, we will encounter the Siding Spring comet that will engulf Mars in October," said AS Kiran Kumar, director Space Applications Centre, Indian Space Research Organisation (ISRO) while talking about the spacecraft that is scheduled to enter the orbit of Mars on September 24.
In a spectacular event on October 19, the MOM will encounter comet Siding Spring, that will come closer to the Red planet than any recorded comet has ever passed Earth. The comet was discovered in 2013 by Robert H McNaught at Siding Spring Observatory.

Mangalyaan on track, no path correction in August

...Also ..
India already planning second mission to Mars
With just two months before India's first mission to Mars arrives at its destination, the country's space agency has announced a second mission to launch between 2017 and 2020.

The mission would be in addition to a one to the Sun planned for launch in 2017 and is a signal of India's ever-growing ambitions for space exploration....
Ranjani Brow

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Ranjani Brow »

Image
SaiK
BRF Oldie
Posts: 36424
Joined: 29 Oct 2003 12:31
Location: NowHere

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by SaiK »

chetak
BRF Oldie
Posts: 32277
Joined: 16 May 2008 12:00

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by chetak »

^^^^^^^^^^
Hold on, Sir.

nazar na lage
Mort Walker
BRF Oldie
Posts: 10033
Joined: 31 May 2004 11:31
Location: The rings around Uranus.

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Mort Walker »

Calling Negi to please place your reverse nazar here.
Surya
BRF Oldie
Posts: 5034
Joined: 05 Mar 2001 12:31

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by Surya »

someone please take the keyboard away from Rien
member_22733
BRF Oldie
Posts: 3788
Joined: 11 Aug 2016 06:14

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by member_22733 »

damn it, plz to nawt jinx.... plzzz

Let us hold our breath until orbital injection is successful. Until then lets not start celebrating.
member_23360
BRFite
Posts: 152
Joined: 11 Aug 2016 06:14

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by member_23360 »

+1 ^^^^^^^^^^

plzzz don't jinx it .....
JE Menon
Forum Moderator
Posts: 7127
Joined: 01 Jan 1970 05:30

Re: Mangalyaan : ISRO's Mars Orbiter Mission

Post by JE Menon »

Fu(k this shite...post deleted. BRF won't be to blame :D
Post Reply