India make History, Mars Orbiter Spacecraft Successfully placed in Mars Transfer

[kbd-raaf]

All Asian newspapers and major foreign news-sites carried MOM news on 1-12-2013

Just checked China,s press like Peoples Daily,Global Times,China Daily.Nine of these newpapers online have reported the success of India,s Mars Orbiter leaving the earth's orbit towards Mars.
What is wrong with such Chinese childish mentality?

Only looked at one:

India's Mars Mission Leaves Earth|chinadaily.com.cn

And it was there.

 

[kurup]

Congratulations to ISRO and all Indians .......

 

[acetophenol]

Great news,bharat matha ki jai!!!

Congrats to ISRO and all the Indians!!

This is an achievement to all the Indians and the entire humanity!

Great news,bharat matha ki jai!!!

Congrats to ISRO and all the Indians!!

This is an achievement to all the Indians and the entire humanity!

 

[shuntmaster]

You are no where close to understanding what the most difficult stage is.

Try to Imagine a marble-1 kept on top of a moving car. Now try to imagine you are sitting in another moving car which is 10 km away and you throw another marble-2 and try to hit marble-1.

That is how tough the mission is. India has just thrown marble-2. So far we have only managed to throw the marble in the general direction of the moving car 10 km away. It is yet to reach anywhere near the vicinity of the other moving car. That itself is a great feat.

But to actually hit the marble-1 sitting on top of that car !!!!!! Calculate the probability of that happening. It is less than 1 in 1 billion or more.

The analogy you gave is completely wrong. There are many windows of opportunities to do mid-course correction for the MOM when going from from Earth orbit to Mars orbit. The mathematics of this is well known. ISRO has lots of experience in orbital maneuvering. But ISRO has no prior experience with orbit insertion at such long distances. Also, there is no certainty on how the 440N apogee motor will perform after almost 300 days being dormant in cold space. Lots of missions have failed before too during the Mars orbit insertion stage.
Wishing ISRO all the best during rest of the mission period.

 

[Star Wars]

All Asian newspapers and major foreign news-sites carried MOM news on 1-12-2013

Just checked China,s press like Peoples Daily,Global Times,China Daily.Nine of these newpapers online have reported the success of India,s Mars Orbiter leaving the earth's orbit towards Mars.
What is wrong with such Chinese childish mentality?

most of the western news papers were talking about poverty **** while Chinese actually congratulated Indians ..Asians need to stick together ...

 

[anjaneyashruti]

The analogy you gave is completely wrong. There are many windows of opportunities to do mid-course correction for the MOM when going from from Earth orbit to Mars orbit. The mathematics of this is well known. ISRO has lots of experience in orbital maneuvering. But ISRO has no prior experience with orbit insertion at such long distances. Also, there is no certainty on how the 440N apogee motor will perform after almost 300 days being dormant in cold space. Lots of missions have failed before too during the Mars orbit insertion stage.
Wishing ISRO all the best during rest of the mission period.

There is no radar in space to track the direction of the shuttle and to track its progress. There are no markers in space which can be used for course correction. Course correction using star mapping is a complex methodology.

When mid course correction is done there is no way to determine if the action is effective and has resulted in corrective action and has not resulted in increasing the error.

If the shuttle is spinning in space as it probably is, every thrust will push it in a different direction depending on when the motor was triggered .

You call this experiment standard or easy only because you cannot comprehend the complexities involved in such space travel. Temperature is only one factor. There is drift due to solar winds. Navigation in space is ridiculously impossible because of the size and distance involved. To control this navigation sitting on Earth is really an incredible feat.

That is the reason why most of the missions to mars has failed. Any success is another step towards learning how to navigate in space and inter planetary travel.

 

[shuntmaster]

There is no radar in space to track the direction of the shuttle and to track its progress. There are no markers in space which can be used for course correction. Course correction using star mapping is a complex methodology.

How do space probes navigate large distances with such accuracy and how do the mission controllers know when they've reached their target?

The accurate navigation of space probes depends on four factors: First is the measurement system for determining the position and speed of a probe. Second is the location from which the measurements are taken. Third is an accurate model of the solar system, and fourth, models of the motion of a probe.

For all U.S. interplanetary probes, the antennas of the Deep Space Network (DSN) act as the measurement system. These antennas transmit radio signals to a probe, which receives these signals and, with a slight frequency shift, returns them to the ground station. By computing the difference between the transmitted and received signals, a probe's distance and speed along the line from the antenna can be determined with great accuracy, thanks to the high frequency of the signals and a very accurate atomic clock by which to measure the small frequency changes. By combining these elements, navigators can measure a probe's instantaneous line-of-sight velocity and range to an accuracy of 0.05 millimeter-per-second and three meters respectively, relative to the antenna.

Many probes also carry cameras that are used to image the destination, whether it be a moon, planet or other body. During the final approach, these images are used when the distance becomes small. For example, the Cassini spacecraft's camera provides an angular measurement with an accuracy of three microradians (three kilometers) at a distance of one million kilometers. The images complement the radio data and provide a direct tie to the target.

Calculation of the trajectory of a space probe requires the use of an inertial coordinate system as well, wherein a grid is laid over the solar system and fixed relative to the star background. For interplanetary missions, an inertial coordinate system with an origin at the center of mass of the solar system is used. Because the measurements provide information on the position of a probe relative to the antenna, knowledge of the antenna's location relative to this inertial coordinate system is used to convert the measurements into elements in the system. Where the antenna is depends not only on its geographic location on Earth's surface, but on Earth's position relative to the solar system center of mass (known as the Earth ephemeris). Measurements of this ephemeris have an accuracy of about 0.5 kilometer and the location of the antenna is known to an accuracy of better than five centimeters.

The third component of interplanetary navigation is an accurate model of the solar system. Gravity is the most important force acting on a spacecraft. Determining these gravitational forces requires accurate knowledge of the locations of all of the major bodies, such as the sun and all the planets, over the course of time. This information is provided by the planetary ephemeris, which has been in continuous development since the beginning of the interplanetary space program. Thanks to this longstanding work, the location of Saturn was known to an accuracy of a few hundreds of kilometers previous to Cassini's final approach when it deployed its camera. After the probe entered Saturn orbit, the moons of the giant planet became important gravitational bodies. Their locations have been determined to an accuracy of a few kilometers relative to Saturn.

The final component of accurate navigation takes all of these other elements and, using models of the forces acting on a probe and orbital dynamics, estimates its location. By taking regular measurements over a period of time, a probe's position and velocity can be determined. For example, Cassini's location is typically determined to a kilometer or less relative to Saturn. Using a probe's known position and velocity, its future positions can be worked out. Navigators compare these positions to the predicted location of the target body--based on the ephemeris--to determine when a probe will reach its target. Then, all that's left to do is to collect the flyby data, take a deep breath, and go on to the next encounter.

 

[funtoosh]

as a good will gesture to Zaid hamid india should plan a pak flag on mars.

 

[Fireurimagination]

Whooooaaa.. Congrats ISRO

 

[anjaneyashruti]

Sorry for bursting your logic bubble, but it's not a game of marbles or poker here! It's not about probabilities at all. It is a totally scientific and mathematical approach keeping the complexities of orbital and celestial mechanics in view.

And that entails some mind boggling calculations on powerful computers to calculate trajectories not only around the Earth but also around the Sun and countering the gravitational forces acting on the spacecraft by other planetary bodies during its journey to Mars which would prompt ground controllers to initiate course corrections from the data received from on- board instruments.

I suggest you have a peek at the link below. It's not just a game of marbles or a wild punch in the dark, hoping for a knock-out. It's all about hardcore calculations. One mistake there and it's curtains......

LOL. Is that your understanding of my post. That it was about a game of marbles or poker ? ........ you need to go back to school to learn English language again. Lay more stress on reading comprehension.

Your attempt to patronize me with your strawman is rather amusing. If I want to learn anything more about inter planetary travel, I know how to use Google. Same as you. I suggest you shove your condescending advice up where the sun does not shine rather than pretend to teach simple physics over the internet to people who are more accomplished than you.

Also take a few classes in statistics and probability before making a fool your yourself.

Does it get any clearer for you ?

 

[Guynextdoor2]

most of the western news papers were talking about poverty **** while Chinese actually congratulated Indians ..Asians need to stick together ...

I agree, Asians, including Pakistan and us, need to stick and work together.

 

[anjaneyashruti]

@shuntmaster

India uses its own Deep Space Network called IDSN for Telemetry tacking command.

Telemetry is done using a 32-m antenna located in the IDSN site at Byalalu. This is connected to the Spacecraft Control Centre / Network Control Centre (ISSDC) in Bangalore. This antenna provides uplink in both S-Band snd X-Band through both circular and linear polarized signals. The standards adapted ensures cross functionality with quasi-governmental space agencies like CCSDS.

The tracking data comprising Range, Doppler and Angle data is calculated based on received signal and is used for determination location of the satellite.

India also has external tracking stations and partnership to ensure near continuous visibility. All stations shown below can communicate with the satellite. They were used for the moon mission and now will again be used for the Mars mission too.

 

[Luftwaffe]

Congratulations, one giant leap for mankind.

 

[WAR-rior]

Time to give a reply to West ..

Time to tell the British that their money is not so wasted ...

Instead we should thank the west and be humble in our achievements. No need to reply to anyone coz they already are in awe by this feat of ours.

Again, I thank NASA for setting the seed of our ISRO scientists. If it was not for the NASA scientists heading back home (SWADES examples in real life), ISRO wont have had achieved champion heights in such less timeframe.

 

[livingdead]

Congratulations, one giant leap for mankind.

lolz.. mankind has done it many times.. one giant leap for Indians probably ..