India's Mars mission suffers glitch, ISRO says spacecraft healthy

[cnleio]

India's Mars mission suffers glitch, ISRO says spacecraft healthy

After having successfully completed three orbit raising manoeuvres, ISRO's Mars Orbiter mission today suffered a glitch as it failed to achieve the targeted apogee (farthest distance from Earth) of one lakh km during the fourth orbit raising operation in the early hours.However, the national space agency clarified that the MarsOrbiter was "normal" and said a supplementary orbit raising operation has been planned at 5 AM (IST) Tuesday to raise the apogee to nearly one lakh km.

During the fourth orbit raising operations which commenced at 2:06 AM Monday, the redundancies built-in for the propulsion system were exercised, including energising the primary and redundant coils of the solenoid flow control valve of 440 Newton Liquid Engine and logic for thrust augmentation by the attitude control thrusters, when needed."However, when both primary and redundant coils were energised together, as one of the planned modes, the flow to the liquid engine stopped.The thrust level augmentation logic, as expected, came in and the operation continued using the attitude control thrusters.This sequence resulted in reduction of the incremental velocity," ISRO said in a statement.

The space agency said while this parallel mode of operating the two coils was not possible for subsequent operations, they could be operated independently in sequence.

During the orbit raising operations conducted since November 7, ISRO has been testing and exercising the autonomy functions progressively, that are essential for Trans-Mars Injection and Mars Orbit Insertion.

During the first three orbit-raising operations,the prime and redundant chains of gyros, accelerometers, 22 Newton attitude control thrusters, attitude and orbit control electronics as well as the associated logics for their fault detection isolation and reconfiguration were exercised successfully, the space agency said.

"The prime and redundant star sensors have been functioning satisfactorily. The primary coil of the solenoid flow control valve was used successfully for the first three orbit-raising operations," it said in a statement.

In the fourth orbit raising operation today, the apogee was raised to 78,276 km against the target of about one lakh km, because incremental velocity imparted to the spacecraft was 35 m/s against the targeted 130 m/s, ISRO said.

The first three orbit raising manoeuvres were conducted last week in a series of five such operations scheduled on the Mars mission.

After successfully completing these operations, the mission is expected to take on the "crucial event" of the trans-Mars injection around 12:42 AM on December 1.

ISRO's PSLV C 25 successfully injected the 1,350-kg Mangalyaan Orbiter (Mars craft) into orbit around Earth some 44 minutes after a textbook launch at 2:38 PM from Satish Dhawan Space Centre at Sriharikota on Tuesday, marking the successful completion of the first stage of the Rs 450-crore mission.

The International Designator or NSSDC ID of India's Mars mission is 2013-060A.

India's Mars orbiter met "a little fault":
The 440 Newton Liquid Engine fail to work only fly by 22 Newton Attitude Control Engines, planed to the targeted 130 m/s but now the spacecraft was 35 m/s, just doubt whether it can fly to Mars ?

 

[Indo-guy]

ISRO Press Release

Supplementary Orbit Raising Manoeuvre Planned for Mars Orbiter Spacecraft


In the fourth orbit-raising operation conducted this morning (Nov 11, 2013), the apogee (farthest point to Earth) of Mars Orbiter Spacecraft was raised from 71,623 km to 78,276 km by imparting an incremental velocity of 35 metres/second (as against 130 metres/second originally planned to raise apogee to about 100,000 [1 lakh] km). The spacecraft is in normal health. A supplementary orbit-raising operation is planned tomorrow (November 12, 2013) at 0500 hrs IST to raise the apogee to nearly 1 lakh km.

During the orbit-raising operations conducted since November 7, 2013, ISRO has been testing and exercising the autonomy functions progressively, that are essential for Trans-Mars Injection (TMI) and Mars Orbit Insertion (MOI).

During the first three orbit-raising operations, the prime and redundant chains of gyros, accelerometers, 22 Newton attitude control thrusters, attitude and orbit control electronics as well as the associated logics for their fault detection isolation, and reconfiguration have been exercised successfully. The prime and redundant star sensors have been functioning satisfactorily. The primary coil of the solenoid flow control valve was used successfully for the first three orbit-raising operations.

During the fourth orbit-raising operations held today (November 11, 2013), the redundancies built-in for the propulsion system were exercised, namely, (a) energising the primary and redundant coils of the solenoid flow control valve of 440 Newton Liquid Engine and (b) logic for thrust augmentation by the attitude control thrusters, when needed. However, when both primary and redundant coils were energised together, as one of the planned modes, the flow to the Liquid Engine stopped. The thrust level augmentation logic, as expected, came in and the operation continued using the attitude control thrusters. This sequence resulted in reduction of the incremental velocity.

While this parallel mode of operating the two coils is not possible for subsequent operations, they could be operated independently in sequence. 

India's Mars mission suffers glitch, ISRO says spacecraft healthy

India's Mars orbiter met "a little fault":
The 440 Newton Liquid Engine fail to work only fly by 22 Newton Attitude Control Engines, planed to the targeted 130 m/s but now the spacecraft was 35 m/s, just doubt whether it can fly to Mars ?

Indian Mars mission suffers glitch but 'no setback'
(AFP) – 2 hours ago
New Delhi — India's Mars spacecraft suffered a brief engine failure Monday as scientists tried to move it into a higher orbit around Earth, but controllers denied any setback to the ambitious low-cost mission.
The Mars Orbiter Mission, which blasted off on November 5 for a 11-month trip to the Red Planet, is being launched on its way via an unusual "slingshot" method for interplanetary journeys.
Lacking a large enough rocket to blast directly out of Earth's atmosphere and gravitational pull, the Indian spacecraft is orbiting Earth until the end of the month while building up enough velocity to break free.
On Monday, during a fourth repositioning to take it 100,000 kilometres (62,000 miles) from Earth, the thruster engines briefly failed, leading the auto-pilot to take over.
"It's not a setback at all. Tomorrow again we'll raise the orbit to 100,000 kilometres," a spokesman for the Indian Space Research Organisation (ISRO), Deviprasad Karnik, told AFP.
The spacecraft is currently at an orbit of 78,276 kilometres and will be raised again at 5 am Tuesday (2330 GMT Monday), an ISRO statement said.
India has never before attempted interplanetary travel and more than half of all missions to Mars have ended in failure, including China's in 2011 and Japan's in 2003.
The cost of the project, at 4.5 billion rupees ($73 million), is less than a sixth of the $455 million earmarked for a Mars probe by NASA which will launch later this month.
ISRO chairman K. Radhakrishnan has called the mission a "turning point" for India's space ambitions and one which would go on to prove its capabilities in rocket technology 
.
Speaking to Pallava Bagla, science editor at Indian broadcasting network NDTV, Isro's chairman K Radhakrishnan said: "The space craft is healthy and it encountered a problem when a specific redundancy test was being conducted and it failed to reach the desired velocity it was to achieve."
This failure to reach the intended velocity raised the spacecraft's apogee (the point in its orbit farthest away from Earth) from 71,623km to just 78,276km - about 25% of the way to the target of 100,000km.
Mr Bagla told BBC News that the attempt on Monday morning used up about 2kg of the craft's 852kg fuel load.
But Mr Bagla added that the spacecraft's insertion into Earth orbit after launch on 5 November had been so precise, 6kg of liquid fuel had been saved. Even with Monday's glitch, the mission still had a fuel surplus of 4kg.
Nevertheless, Mr Radhakrishnan said that a failure analysis committee would examine why the problem occurred.

BBC News - Indian Mars mission hit by snag

 

[OrionHunter]

Murphy's law
http://en.wikipedia.org/wiki/Murphy's_law
"If anything bad can happen, it probably will."

In other words, this mission can get badly fu@ked up. But hopefully it won't!

 

[Indo-guy]

From analysis of ISRO Press release it is clear that this is not the instance of Engine failure but failure of alternate programme .


ISRO is therefore going for supplementary Orbit raising maneuver tonight - which is indicative of the fact that engine is in good shape ....

The glitch happened due to faulty algorithm ....


An additional incremental velocity is required for orbit raising, and additional fuel from satellite will be expended.

Incremental changes in velocity will cause the satellite to change orbit, but the point at which this is executed will lie on the new orbit. For an elliptical orbit, the equilibrium relationship does not exist and the velocity varies depending on the earth-satellite separation and the earth gravitational force/centrifugal force balance. The raising of the orbit is very difficult but so far ISRO has handled things with high degree of perfection

 

[Star Wars]

miniscule problem..already fixed

 

[Guynextdoor2]

some people are going to get o*gasmic today

 

[Indo-guy]

Murphy's law
"If anything bad can happen, it probably will."

In other words, this mission can get badly fu@ked up. But hopefully it won't!

all is not lost until everything is lost !


No need to panick just yet .

I trust ISRO press release ...Had it been anything serious ISRO would have had clarified so ....

Mission is not in danger as it still has surplus fuel ....and engine is fine !

wait till tomorrow .....we will know the result of supplementary orbit raising maneuver !!!

 

[GR!FF!N]

thanks @Indo-guy for clearing the air...



Recent News...........................................

Mangalyaan takes glitch in stride, mission 100% safe

India’s ambitious Mars mission remained on track despite an orbit-raising manoeuvre falling short of the targeted height due to a glitch in the propulsion system on Monday.

The manoeuvre at 2.06am to raise the apogee (farthest point from Earth) of Mangalyaan from 71,623 km to 100,000 km could only achieve 78,276 km.

This was the first orbit-raising move to fall short ofobjective after three successful manoeuvres following the launch on November 5.

The Indian Space Research Organisation (Isro) dismissed alarms over the below par performance.

“The spacecraft is in normal health. There is no concern at all. There is no problem at all in th

e system. The Mars mission is 100% safe,” a spokesperson of the Bangalore-headquartered Isro said.

On the glitch, an Isro statement said, “During the fourth orbit-raising operations, the redundancies built-in for the propulsion system were exercised. However, when both primary and redundant coils were energised together, as one of the planned modes, the flow to the liquid engine stopped.”

The space agency has planned a supplementary orbit-raising operation at 5am on Tuesday to raise the apogee to the targeted 100,000 km.

During the orbit-raising operations conducted since November 7, Isro has been testing and exercising the autonomy functions progressively that are essential for Trans-Mars Injection (TMI) and Mars Orbit Insertion.

The Mars Orbiter Spacecraft is scheduled to leave Earth’s sphere of influence on December 1 and move to the Trans Martian Orbit. It is slated to move into the Mars orbit on September 24, 2014.

The Mangalyaan probe, India’s first interplanetary mission, has a Rs. 450-crore price tag, which is less than a sixth of the amount earmarked for a Mars probe to be launched by the National Aeronautics and Space Administration (Nasa).

Only the US, Europe, and Russia have sent probes that have orbited or landed on Mars. Probes to Mars have a high failure rate and a success will be a boost for national pride, especially after a similar mission by China failed to leave Earth’s orbit in 2011.

China closely followed Mangalyaan’s successful launch, which will aid India’s efforts to capture more of the $304 billion (Rs 18.73 lakh crore) global space market with its low-cost technology.

Mangalyaan takes glitch in stride, mission 100% safe - Hindustan Times

 

[Indo-guy]

thanks @Indo-guy for clearing the air...



Recent News...........................................

Mangalyaan takes glitch in stride, mission 100% safe

India’s ambitious Mars mission remained on track despite an orbit-raising manoeuvre falling short of the targeted height due to a glitch in the propulsion system on Monday.

The manoeuvre at 2.06am to raise the apogee (farthest point from Earth) of Mangalyaan from 71,623 km to 100,000 km could only achieve 78,276 km.

This was the first orbit-raising move to fall short ofobjective after three successful manoeuvres following the launch on November 5.

The Indian Space Research Organisation (Isro) dismissed alarms over the below par performance.

“The spacecraft is in normal health. There is no concern at all. There is no problem at all in th

e system. The Mars mission is 100% safe,” a spokesperson of the Bangalore-headquartered Isro said.

On the glitch, an Isro statement said, “During the fourth orbit-raising operations, the redundancies built-in for the propulsion system were exercised. However, when both primary and redundant coils were energised together, as one of the planned modes, the flow to the liquid engine stopped.”

The space agency has planned a supplementary orbit-raising operation at 5am on Tuesday to raise the apogee to the targeted 100,000 km.

During the orbit-raising operations conducted since November 7, Isro has been testing and exercising the autonomy functions progressively that are essential for Trans-Mars Injection (TMI) and Mars Orbit Insertion.

The Mars Orbiter Spacecraft is scheduled to leave Earth’s sphere of influence on December 1 and move to the Trans Martian Orbit. It is slated to move into the Mars orbit on September 24, 2014.

The Mangalyaan probe, India’s first interplanetary mission, has a Rs. 450-crore price tag, which is less than a sixth of the amount earmarked for a Mars probe to be launched by the National Aeronautics and Space Administration (Nasa).

Only the US, Europe, and Russia have sent probes that have orbited or landed on Mars. Probes to Mars have a high failure rate and a success will be a boost for national pride, especially after a similar mission by China failed to leave Earth’s orbit in 2011.

China closely followed Mangalyaan’s successful launch, which will aid India’s efforts to capture more of the $304 billion (Rs 18.73 lakh crore) global space market with its low-cost technology.

Mangalyaan takes glitch in stride, mission 100% safe - Hindustan Times

The 1,340-kg Mars Orbiter carries 852 kg of fuel on-board. Around 360 kg fuel was likely to be expended on the six orbit raising activities.

MOM saved 6 kg of precious fuel due to precise insertion of spacecraft by PSLV .

of this 2 kg fuel was wasted in the recent maneuver....so there is still surplus of 4 kg fuel .


This is besides back up extra fuel kept for contingency in space craft !!!

I think there is more than enough fuel still in MOM ....

We will know outcome of Supplementary Orbit raising maneuver planned tomorrow early morning ....

Hopefully next orbit raising maneuver is successful !

 

[Destro]

Mission has probably been abandoned already, they just won't admit it for pride.

 

[President]

Mission has probably been abandoned already, they just won't admit it for pride.

anything esle..did not exepect anything from our dear neighbours anyway..after sucessfull blastoff..the chinese were the first for mutual collaboration theory...

 

[Dandpatta]

anything esle..did not exepect anything from our dear neighbours anyway..after sucessfull blastoff..the chinese were the first for mutual collaboration theory...

Eating too much pork-meat in daily diet has that effect .

 

[isro2222]

Latest news. Congratulation india and ISRO.... Midnight it achieved desired distance. Its successful. Must read
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