Author Topic: ISRO Mars Orbiter Mission - Nov 2013 launch to September 2014 arrival - UPDATES  (Read 453110 times)

Offline Steven Pietrobon

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From the ISRO Chair interview, the final trans Mars injection (TMI) burn is scheduled for 1 December.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline vyoma

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Orbit raising manoeuvre dates: November 6, 7, 8, 9, 11, 16, and December 1.

http://timesofindia.indiatimes.com/india/Mars-mission-Journey-has-only-begun-challenging-phase-is-coming-Isro-says/articleshow/25270007.cms
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What follows in the next 10 days would be six crucial "orbit raising operations," in the wee hours of November 6, 7, 8, 9, 11 and 16.

And then, at 12.42am on December 1, the orbiter will leave the earth's orbit for a 300-day journey to the red planet.


« Last Edit: 11/06/2013 05:22 AM by vyoma »

Offline plutogno

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I have not seen it mentioned elsewhere. from the parameters of the first orbit, the orbital period seems to be close to 6h 50 min

Offline vyoma

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MOM NORAD tracking:
http://www.n2yo.com/satellite/?s=39370

http://timesofindia.indiatimes.com/india/Mars-Orbiter-Mission-most-tracked-spacecraft/articleshow/25326491.cms
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It is now at an altitude of 17,376km going at a speed of 1.21km/second at 5.25pm [IST].

"The health of the spacecraft is being monitoring continuously as it is good," a spokesperson of Indian Space Research Organisation (Isro) told The Times of India.

Offline seshagirib

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Was it possible now or maybe possible at a future date (when the planets are in the right position ) to have a more energy efficient trajectory, with venus flyby ( gravitational slingshot ).

I remember seeing such a trajectory for a simulated Ares mission on youtube.

Such a trajectory if possible would mean more intrumentation payload , and bonus science @ venus flyby.

Offline ugordan

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Such a trajectory if possible would mean more intrumentation payload , and bonus science @ venus flyby.

And probably also bonus thermal problems...

Offline antriksh

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1. Early tomorrow (Thursday) at 1.17 a.m. the on-board motors of Mars Orbiter will be fired for around 200 seconds to raise its orbit by around 4,120 km to 28,785 km

2. around 40 kg of the on-board fuel was expected to be burnt in the first orbit raising activity slated for Thursday.

3. around 360 kg fuel was likely to be expended on the six orbit raising activities.

4. Mars Orbiterís orbit would be raised on 7,10, 15 and 30 of November.

5. The fuel requirement in the Mars orbit is not much. The Orbiter needs only two kg fuel for six months.

So roughly 400-500 kg propellant will be left with the orbiter after six months of orbit around Mars.


Source: http://www.firstpost.com/india/mars-mission-isro-to-raise-mangalyaan-orbit-to-28485-km-tomorrow-1214513.html?utm_source=hp-footer
Nasadiya Sukta:
Srishti se pehle sat nahin thaa, asat bhi nahin | Antariksh bhi nahin, aakaash bhi nahin thaa | chhipaa thaa kyaa, kahaan, kisne dhakaa thaa | us pal to agam, atal jal bhi kahaan thaa ||

From: 1st verse of 129th Hymn of the 10th Book of Rig Veda

Offline antriksh

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Was it possible now or maybe possible at a future date (when the planets are in the right position ) to have a more energy efficient trajectory, with venus flyby ( gravitational slingshot ).

I remember seeing such a trajectory for a simulated Ares mission on youtube.

Such a trajectory if possible would mean more intrumentation payload , and bonus science @ venus flyby.

Future missions will use more powerful GSLV or LVM3, so perhaps such extreme trajectories may not be required.
Nasadiya Sukta:
Srishti se pehle sat nahin thaa, asat bhi nahin | Antariksh bhi nahin, aakaash bhi nahin thaa | chhipaa thaa kyaa, kahaan, kisne dhakaa thaa | us pal to agam, atal jal bhi kahaan thaa ||

From: 1st verse of 129th Hymn of the 10th Book of Rig Veda

Offline seshagirib

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^ not clear if this includes fuel for breaking into mars orbit....

Offline antriksh

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Update ISRO FB:


ISRO's Mars Orbiter Mission Spacecraft has to go several rounds around Earth to gradually increase its velocity to attain the escape velocity with minimum fuel consumption.
This is planned in a series of Midnight manoeuvers (a.k.a Earth Bound Manoeuvers) in which MOMís engine will be fired in a direction tangential to Earth while MOM is at its closest orbital position to Earth.
The six ellipses represent the various orbits of the spacecraft around Earth and the outward trajectory represents the Trans-Mars Injection Manoeuver.

The first of this series of Midnight Manoeuvers is planned at 01: 17 Hrs IST tonight !
Nasadiya Sukta:
Srishti se pehle sat nahin thaa, asat bhi nahin | Antariksh bhi nahin, aakaash bhi nahin thaa | chhipaa thaa kyaa, kahaan, kisne dhakaa thaa | us pal to agam, atal jal bhi kahaan thaa ||

From: 1st verse of 129th Hymn of the 10th Book of Rig Veda

Offline antriksh

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^ not clear if this includes fuel for breaking into mars orbit....

Yeah, I didn't account for that. So also considering the MOI burn, perhaps roughly 50-100 kgs will be left.
Nasadiya Sukta:
Srishti se pehle sat nahin thaa, asat bhi nahin | Antariksh bhi nahin, aakaash bhi nahin thaa | chhipaa thaa kyaa, kahaan, kisne dhakaa thaa | us pal to agam, atal jal bhi kahaan thaa ||

From: 1st verse of 129th Hymn of the 10th Book of Rig Veda

Offline antriksh

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Nerve Center of MOM mission- ISTRAC
Nasadiya Sukta:
Srishti se pehle sat nahin thaa, asat bhi nahin | Antariksh bhi nahin, aakaash bhi nahin thaa | chhipaa thaa kyaa, kahaan, kisne dhakaa thaa | us pal to agam, atal jal bhi kahaan thaa ||

From: 1st verse of 129th Hymn of the 10th Book of Rig Veda

Offline Lars_J

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A great launch - Congratulations to all involved!

Offline baldusi

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By the way, there are no slingshots or magnetic fields involved in this. To perform a slingshot requires three bodies, one of them being the spacecraft. Examples of the two other bodies are the Earth and the Moon (spacecraft in orbit around Earth slingshots past the Moon) or the Sun and the Earth (spacecraft in orbit around Sun slingshots past the Earth). As MOM is in orbit around Earth and won't be going near the Moon, there can be no slingshot.
Isn't the efficiency of the perigee burn given because of the Oberth Effect? If somebody tried to explain to a journalist that it takes advantage of the stronger gravitational field and subsequent maximum on momentum energy to maximize the efficiency of the reaction mass wrt to the apogee, I wouldn't be surprised if the journalist would have understood a slingshot and may be remembered the word field, thus, it surely meant a sling shot through the magnetic filed.

Offline ss1_3

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^ not clear if this includes fuel for breaking into mars orbit....

Yeah, I didn't account for that. So also considering the MOI burn, perhaps roughly 50-100 kgs will be left.

Plus, there will be at least three mid course corrections en route as well.

http://timesofindia.indiatimes.com/india/A-star-trek-300-day-game-of-maths-maze-and-Mars/articleshow/25279010.cms   (second last para)

Offline Olaf

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1. Early tomorrow (Thursday) at 1.17 a.m. the on-board motors of Mars Orbiter will be fired for around 200 seconds to raise its orbit by around 4,120 km to 28,785 km
If this is IST, than it just happened.

Offline vyoma

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Update from ISRO MOM Facebook page:
Quote
First Midnight Manouever of ISROís Mars Orbiter Mission Spacecraft completed successfully.

https://www.facebook.com/pages/ISROs-Mars-Orbiter-Mission/1384015488503058
« Last Edit: 11/06/2013 07:07 PM by vyoma »

Offline Star One

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Update from ISRO MOM Facebook page:
Quote
First Midnight Manouever of ISROís Mars Orbiter Mission Spacecraft completed successfully.

https://www.facebook.com/pages/ISROs-Mars-Orbiter-Mission/1384015488503058

Good. One down five to go.

Offline sanman

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^ not clear if this includes fuel for breaking into mars orbit....

Yeah, I didn't account for that. So also considering the MOI burn, perhaps roughly 50-100 kgs will be left.

This article says that their nominal objective is to use 800 kg of fuel for completing the mission, and they've kept 50 kg in reserve for any unplanned corrective maneuvers required:

http://www.deccanherald.com/content/367441/saving-fuel-critical-mars-mission.html

If by some miracle everything were to go perfectly and that 50 kg reserve still remained, I wonder if it could be enough to fling it somewhere else? Is the asteroid belt too far?

Offline vyoma

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Attaching the details about apogee and perigee of MOM, as on Nov 6th and Nov 7th. Apogee has been increased from 23,903 km to 28,746 km.
(source: http://www.n2yo.com/satellite/?s=39370)
« Last Edit: 12/02/2013 06:52 AM by input~2 »

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