Do the planned mid-course corrections impart additional velocity to the spacecraft?
Or is there some figure or math that I got wrong here?
Assuming that the current escape velocity of the spacecraft as around 11 km/s, I do get the math of covering 1 million km a day. But with that speed, wouldn't we be covering only around 300+ million km in 300 days? How would we cover 680 million km within the same timeframe (unless the spacecraft receives an acceleration to attain nearly double the escape velocity, that is..). Do the planned mid-course corrections impart additional velocity to the spacecraft? Or is there some figure or math that I got wrong here?
Quote from: vineethgk on 12/02/2013 06:07 amAssuming that the current escape velocity of the spacecraft as around 11 km/s, I do get the math of covering 1 million km a day. But with that speed, wouldn't we be covering only around 300+ million km in 300 days? How would we cover 680 million km within the same timeframe (unless the spacecraft receives an acceleration to attain nearly double the escape velocity, that is..). Do the planned mid-course corrections impart additional velocity to the spacecraft? Or is there some figure or math that I got wrong here?11 km/s is the speed of the probe relative to Earth. that translates into more than 40 km/s relative to the Sun. then you have to consider that this speed is not constant at all along the elliptical orbit. it's not simple math anyway
Spacecraft has travelled a distance of 536,000 km by 17:00 hrs (IST) of Dec 2, 2013. It has crossed the distance to Moon's orbit around Earth (mean distance 385,000 km) this morning.
Spacecraft has traversed beyond the Sphere of Influence (SOI) of Earth extending about 925,000 km at around 1:14 hrs (IST) on Dec 4, 2013.
It's interesting that the Indian language has short, simple words for such large numbers ("one hundred thousand" and "ten million" in English).
Those are indeed wild ideas. Wild to the point of silly. The solar system is an enormous structure. Spacecraft are built for specific purposes. Flitting about is pointless and impractical, most likely impossible. Plus there were already discussions of slightly less-than-impossible ideas like aero-braking for extended missions. As it stands our Indian colleagues are doing remarkable things incredibly fast on extremely lean budgets. These are stellar and thoroughly admirable accomplisments.
"We have not yet started any twitter feed. Please note that,facebook.com/isromom is the only social media entity officially hosted byISRO."
Well, I take my words back regarding twitter stream! Mars Orbiter Mission @Mangalyaan1 #MangalyaanIndia Space @India_inSpace If anyone interested like me: MAVEN Mission @MAVEN2Mars
Controllers of its various systems met at tracking centre ISTRAC in the evening to take stock of its situation and plan the operation, called trajectory correction manoeuvre (TCM). Team ISRO calls it fine-tuning of its course.This TCM is needed as the spacecraft slightly overachieved its parameter, which can happen during operations such as the crucial December 1 manoeuvre, said M. Annadurai, Programme Director of the Mars Orbiter Mission.Monday’s meeting was to take stock, finalise the duration of firing the smaller thrusters — tentatively for about 40 seconds at 6.30 a.m. [IST] on December 11 — and the rest of the TCM-1 strategy.This time, all eight small 22-Newton thrusters on the spacecraft would be used to minutely slow it down.
ISRO's Mars Orbiter Mission spacecraft started the 44 seconds long firing of its 22N thrusters, for the First Trajectory Correction Manoeuver.
First Trajectory Correction Manoeuver completed successfully.
The first Trajectory Correction Manoeuvre (TCM) of Spacecraft was carried out successfully at 06:30 hrs (IST) by firing the 22 Newton Thrusters for a duration of 40.5 seconds. The spacecraft is travelling at a distance of about 29 lakh (2.9 million) km away from Earth.
Yes, but @Mangalyaan1 is not an ISRO account as far as I can tell. Don't know about India in Space.
Quote from: jcm on 12/10/2013 05:21 amYes, but @Mangalyaan1 is not an ISRO account as far as I can tell. Don't know about India in Space.I'm not registered (only use them for corporate presence/support) on Twitter or FB, yet those twitter handles shed some info so it's kinda complementary to FB.Something is better than nothing
That press release makes no sense because it goes against the spirit of sharing knowledge. Example, Curiosity mission.
“The Mars orbiter was more than four million km away as of yesterday. The spacecraft is in good health,” he said on Tuesday from Bangalore. Every day, precision ranging of the spacecraft was being done to know where exactly it was and how far away it was. Ground controllers from the ISRO Telemetry, Tracking and Command Network (ISTRAC) in Bangalore, and the Indian Deep Space Network (IDSN) at Byalalu, near Bangalore, were communicating with the spacecraft.Since the Mars spacecraft had travelled more than four million km away, “there is a communication delay of 12 seconds” each way, Dr. Radhakrishnan said.
The orbiter “is in a parabolic trajectory around the sun towards Mars” said Deviprasad Karnik, ISRO spokesperson. The spacecraft had to be “seen” continuously, that is, it should be monitored all the time. So ground controllers from ISTRAC and IDSN were communicating with it.As of now, the ground controllers at the IDSN were communicating with the spacecraft, using the dish-antenna with a diameter of 18 metres. From April 2014, they would use the 32-metre antenna to keep a tab on it, Mr. Karnik said.
Few updates on ISRO MOM: QuoteThe orbiter “is in a parabolic trajectory around the sun towards Mars” said Deviprasad Karnik, ISRO spokesperson. The spacecraft had to be “seen” continuously, that is, it should be monitored all the time. So ground controllers from ISTRAC and IDSN were communicating with it. http://www.thehindu.com/sci-tech/science/mars-orbiter-well-on-its-way/article5471052.ece
The orbiter “is in a parabolic trajectory around the sun towards Mars” said Deviprasad Karnik, ISRO spokesperson. The spacecraft had to be “seen” continuously, that is, it should be monitored all the time. So ground controllers from ISTRAC and IDSN were communicating with it. http://www.thehindu.com/sci-tech/science/mars-orbiter-well-on-its-way/article5471052.ece