Mangalyaan: ISRO's Mars Orbiter Mission

Victor · Post by **Victor** » 16 Nov 2013 01:26

440N Liquid Engine completed firing successfully to raise the apogee to about 1.92 lakh km in this 5th Manoeuver
Link

putnanja · Post by **putnanja** » 16 Nov 2013 02:27

[/quote]

It was supposed to be 199k+ kms after the fifth firing. It is now around 192k+ kms. Will it have much of an effect on transferring to the Mars orbit?

Indranil · Post by **Indranil** » 16 Nov 2013 02:51

^^^ There are some discrepancies with that chart.

NRao · Post by **NRao** » 16 Nov 2013 03:07

indranilroy wrote:^^^ There are some discrepancies with that chart.

..........................? Waiting.

Will it have much of an effect on transferring to the Mars orbit?

I was under the understanding that it first went into an orbit around the Sun (the transit between Earth and Mars) and then Mars. No? do I have that wrong?

Victor · Post by **Victor** » 16 Nov 2013 03:31

putnanja wrote:
It was supposed to be 199k+ kms after the fifth firing. It is now around 192k+ kms. Will it have much of an effect on transferring to the Mars orbit?

FB announcement sometime before the maneuver said "This manoeuver, scheduled at 01:27 hrs IST, will take the spacecraft to - almost half the way to moon - about 1.92 lakh kilometers." and looks like that's what was achieved.

Sridhar · Post by **Sridhar** » 16 Nov 2013 03:33

NRao,

The next orbit raising maneuver (on December 1) will take the spacecraft outside the sphere of influence of the earth - it will then essentially be in an orbit around the Sun that intersects with the orbit of Mars in September next year at the precise moment when Mars arrives there. At that point, it will be within the sphere of influence of Mars, and appropriate firing of the spacecraft's engine will slow it down sufficiently for it to be captured by Mars and enter an orbit around it.

Sridhar · Post by **Sridhar** » 16 Nov 2013 03:34

This image from the mission's website explains it like no words can.

manoba · Post by **manoba** » 16 Nov 2013 18:10

From N2YO Real Time Satellite Tracking site:

NORAD ID: 39370
Int'l Code: 2013-060A
Perigee: 853.1 km
Apogee: 194,683.1 km
Inclination: 19.4 °
Period: 5,574.2 minutes
Semi major axis: 104139 km
Launch date: November 5, 2013
Source: India (IND)

It says the apogee is 1,94,683.1 km. But ISRO's press release says apogee is 1,92,874 km.

The fifth orbit raising manoeuvre of Mars Orbiter Spacecraft, starting at 01:27 hrs(IST) on Nov 16, 2013, with a burn Time of 243.5 seconds has been successfully completed.The observed change in Apogee is from 118642km to 192874km.

Which one is correct? Will the around 2,000 km makes a big difference or it's negligible, especially with such an elongated orbit?

N2YO source

ISRO Press Release

SaiK · Post by **SaiK** » 16 Nov 2013 18:56

Do we have fuel status now for the next green line traversal?

member_28108 · Post by **member_28108** » 16 Nov 2013 19:29

Hello. I am a new "active member" of BF(I used to just read the posts because I did not have a "non free email address"
I had sent an email regarding the tracking data at N2yo as it showed wrong values during the perigee burn (It showed an altitude of 22 Kms !!) and the owner of the website and I discussed this issue. He said it could be due to some issues with the AFPSC data. The Satflare sight calculated a higher value. He suggested that I see the values in different calculators based on the orbital elements. He will be removing the tracking of MOM shortly as the highly eccentric orbital path makes it difficult to track.I requested him to keep it till at least Dec 2nd so that we can continue to track it.

SSSalvi · Post by **SSSalvi** » 17 Nov 2013 19:47

Mangalyaan altitude at 1 hr interval from 17th Nov to 2nd Dec in a graphical manner

Generated with follwing Values

MARS ORBITER MISSION
1 39370U 13060A 13319.85296673 -.00001668 00000-0 00000+0 0 188
2 39370 19.4167 122.9551 9306301 288.8779 2.1288 0.25833433 156

Which yields: ( Rounded up for clarity )

Ap=194676
Per=846
Period : 92.9 Hrs
S Maj A : 104139
S Min A : 38111

Lilo · Post by **Lilo** » 17 Nov 2013 22:14

prasannasimha wrote:Hello. I am a new "active member" of BF(I used to just read the posts because I did not have a "non free email address"
I had sent an email regarding the tracking data at N2yo as it showed wrong values during the perigee burn (It showed an altitude of 22 Kms !!) and the owner of the website and I discussed this issue. He said it could be due to some issues with the AFPSC data. The Satflare sight calculated a higher value. He suggested that I see the values in different calculators based on the orbital elements. He will be removing the tracking of MOM shortly as the highly eccentric orbital path makes it difficult to track.I requested him to keep it till at least Dec 2nd so that we can continue to track it.

Welcome Prasannasimha ji,
And thanks for your efforts.

member_28108 · Post by **member_28108** » 17 Nov 2013 22:24

Thanks for the Welcome Lilo. I am a cardiac surgeon.
Lot of good discussion also going on the ISRO Mars Orbiter Mission page .Good for learning a bit of Orbital Astronomy.

Lilo · Post by **Lilo** » 17 Nov 2013 22:35

Good to have you with us doctor .
When you come across snippets of interest from the discussion happening on ISRO MOM page , do cross post them here for us !

member_28108 · Post by **member_28108** » 17 Nov 2013 22:49

SSSalvi, How did you calculate the apogee and perigee from the two line element? (Using the first and second derivative of the mean motion ?)

member_28108 · Post by **member_28108** » 17 Nov 2013 23:11

http://www.satflare.com/news/n39370/Mom_OrbitRises.png

http://www.satflare.com/news/n39370/MomOrbit_Nov16.png

http://www.satflare.com/news/n39370/MomApogee_Nov19.png

SaiK · Post by **SaiK** » 18 Nov 2013 00:46

as of now from http://science.nasa.gov/iSat/

sanjaykumar · Post by **sanjaykumar** » 18 Nov 2013 04:12

Thanks for the Welcome Lilo. I am a cardiac surgeon.
Lot of good discussion also going on the ISRO Mars Orbiter Mission page .Good for learning a bit of Orbital Astronomy.

Welcome...I have an 'MIT' IQ.

member_28108 · Post by **member_28108** » 18 Nov 2013 08:08

I am unable to see the MOM satellite in the choices in the nasa iSat site.Where is the satellite mentioned ?(ie which drop down menu ?)

SriKumar · Post by **SriKumar** » 18 Nov 2013 08:43

^^^ Your bowser needs updating. On the page, click on TEXT only
Or the link below. It has only one dropdown menu: Choose "Last 30 day launches"
http://science.nasa.gov/iSat/iSAT-text-only/

SSSalvi · Post by **SSSalvi** » 18 Nov 2013 15:20

prasannasimha wrote:SSSalvi, How did you calculate the apogee and perigee from the two line element? (Using the first and second derivative of the mean motion ?)

Used to do calculations a few years ago. Now many multipurpose tools ( Online and standalone ) are available so stopped.

E.g. NOVA for Widows ( used for generating graphics uploaded in this thread earlier), SATSCAPE ( Heard about it but not checked )

Since you have already done calculations I am sure you must have visited following

http://en.wikipedia.org/wiki/Orbital_elements
http://www.satobs.org/tletools.html
http://satelliteorbitdetermination.com/ ... s_wiki.htm

kaldag · Post by **kaldag** » 18 Nov 2013 18:37

SSSalvi wrote:Mangalyaan altitude at 1 hr interval from 17th Nov to 2nd Dec in a graphical manner

Which yields: ( Rounded up for clarity )

Ap=194676
Per=846
Period : 92.9 Hrs
S Maj A : 104139
S Min A : 38111

Lets say S Maj A = a and S Min A = b.
Then eccentricity e = sqrt(1 - b^2/a^2)

Apogee = a+a*e
Perigee = a-a*e

By my calculations that yields e=0.93063, Apogee=201053.823, Perigee=7224.2.
Where am I going wrong? Thanks a lot.

juvva · Post by **juvva** » 18 Nov 2013 20:14

^kaldag: looks like the perigee and apogee being stated here, are distances from the surface of earth -not the centre, you may need to factor in the radius of earth.

SBajwa · Post by **SBajwa** » 18 Nov 2013 20:35

Today Around 10:30 AM (Eastern Standard Time) NASA reported this which is approximately when LAM will be fired on Dec 1st. This is the closest point to the earth just when its height starts getting increased and velocity starts going down.

Velocity 10.056 (km/s)
Latitude -17.266
Longitude - 126.861
Height - 254.061 KM

member_28108 · Post by **member_28108** » 18 Nov 2013 21:55

Still no luck with those sites .Can't imagine why.

SaiK · Post by **SaiK** » 18 Nov 2013 23:01

http://www.thehindu.com/features/kids/f ... epage=true
At stake

Past missions to Mars include flyby missions like Mariner 7 (NASA), orbiters like Mangalyaan (ISRO), landers like Viking 1 (NASA) and rovers like Curiosity (NASA). Though more than half of all Mars missions have been failures, the mistakes made helped scientists evolve their design and plan future successful missions.

Why some missions failed:

Bad timing: Though the Russian Kosmos 419 (1971) reached Earth’s orbit, it never reached Mars’ orbit because of a wrong ignition time setting. Instead of being set for 1.5 hours after launch, it was accidentally set for 1.5 years after launch. The spacecraft soon re-entered Earth’s orbit and disintegrated.

Faulty software: Bad mathematics may not kill you, but they can kill spacecraft! NASA’s Mars Climate Orbiter (1998) disintegrated because at one instance, its software used the wrong units (pounds, instead of Newtons). This caused the spacecraft to be placed too close to Mars where atmospheric stresses destroyed it.

Solar flares and fuel shortage: The communication systems of Japan’s Nozomi orbiter (1998) were disrupted by powerful solar flares. It also damaged the heat control system causing the fuel to freeze. It was unable to attain Mars orbit and operation was terminated.

Nobody really knows: Just three days away from Mars, all communication was suddenly lost with NASA’s Mars Observer (1992). For months, scientists could not explain what became of the spacecraft, but investigations finally concluded that a fuel and gas leak had probably sent the spacecraft into an uncontrollable spin damaging critical electrical circuits.

Hiten · Post by **Hiten** » 19 Nov 2013 09:46

SriKumar wrote:^^^ Your bowser needs updating. On the page, click on TEXT only
Or the link below. It has only one dropdown menu: Choose "Last 30 day launches"
http://science.nasa.gov/iSat/iSAT-text-only/

Mangalyaan not listed here
http://s017.radikal.ru/i442/1311/d3/140e1ab6b44c.jpg

Tried it on Firefox & Chrome, all updated to the latest version

Bade · Post by **Bade** » 19 Nov 2013 09:51

Mon Nov 18 2013 23:50:31 GMT-0500 (Eastern Standard Time)

Name ID Velocity Latitude Longitude Height (Km) Height (M)
SHIJIAN-16 (SJ-16) 39358 6979 18.882 22.621 603.278 374.860
CZ-4B R/B 39359 6890 14.027 -149.876 513.377 318.998
SIRIUS FM-6 39360 42167 0.074 -120.645 35788.987 22238.239
BREEZE-M R/B 39361 29840 -17.944 48.609 23463.498 14579.537
BREEZE-M DEB [TANK] 39362 11461 -49.545 70.792 5095.497 3166.194
YAOGAN 18 39363 6883 73.985 -130.783 524.140 325.686
CZ-2C R/B 39364 6935 57.916 -115.740 572.228 355.566
CZ-2C DEB 39365 7023 -45.579 -95.599 655.686 407.425
CZ-2C DEB 39366 6881 -3.456 75.062 502.618 312.312
CZ-2C DEB 39367 6724 -82.615 -2.813 366.899 227.980
CZ-2C DEB 39368 6695 -69.972 56.507 335.742 208.620
MARS ORBITER MISSION 39370 121066 15.242 -240.263 114689.598 71264.790
PSLV R/B 39371 23279 8.481 -218.806 16901.760 10502.263
SOYUZ-TMA 11M 39373 6800 -51.770 -163.616 434.867 270.213
RADUGA-1M 3 39375 41958 -0.056 86.940 35579.706 22108.198
BREEZE-M R/B 39376 41953 0.075 -210.038 35574.690 22105.081
BREEZE-M DEB [TANK] 39377 22801 32.572 69.456 16429.453 10208.786

Hiten · Post by **Hiten** » 19 Nov 2013 09:57

^^ is it a Geo-Location thing?
list it shows when accessed in India

Bade · Post by **Bade** » 19 Nov 2013 10:21

I would be surprised if there is an explicit ban in India to display MOM data. Or has it something to do with regulations ?

member_28108 · Post by **member_28108** » 19 Nov 2013 14:35

I think it is related to some Browser issue. I saw MOM on my Mobile phone the first time but could not access it again whereas I caould not access it at all from my desktop.

member_28026 · Post by **member_28026** » 19 Nov 2013 16:36

Thankyou ISRO

rsingh · Post by **rsingh** » 19 Nov 2013 21:57

Bhy eye see MALE sign onlee.........

member_22539 · Post by **member_22539** » 20 Nov 2013 07:08

^I think that is the astronomical symbol for Mars.

member_28108 · Post by **member_28108** » 20 Nov 2013 08:25

http://en.wikipedia.org/wiki/Mars_symbol

juvva · Post by **juvva** » 20 Nov 2013 09:02

^For sake of completeness, the Venus symbol:

http://en.wikipedia.org/wiki/Venus_symbol

member_28108 · Post by **member_28108** » 20 Nov 2013 09:39

deleted

SaiK · Post by **SaiK** » 20 Nov 2013 10:42

Satellite ID
39370
Velocity (km/s)
1.618
Velocity (mi/s)
1.005
Latitude (°)
19.596
Longitude(°)
70.395
Height (km)
117322.771
Height (mi)
72900.967

it looks like 2/3rd distance from perigee.
iSat site

manoba · Post by **manoba** » 20 Nov 2013 10:47

rsingh wrote: Bhy eye see MALE sign onlee.........

As the old saying goes... "Men are from Mars, Women are from Venus".

It's a decent logo for MOM. Shows ISRO's PR is maturing.
Also, now they are interacting with the public with their Facebook pages, it's a good sign.

member_28108 · Post by **member_28108** » 20 Nov 2013 18:21

From the f MOM ISRO FB page All health checks are OK and so for a Go on Dec 1st
So far so good:
On November 05, MOM was put into an orbit of 247 km by 23,567 km around the Earth, by PSLV-C25. Thus began MOM’s geo-centric phase of its journey to Mars! In the last two weeks, the spacecraft has been moved to higher apogee height of almost 2 lakh km in six manoeuvres. The spacecraft is now preparing for the final burn planned on Dec 01, 2013 targeted to achieve the velocity required to escape from Earth's gravity. We have also been evaluating various subsystems and payloads on-board MOM. Performance of all the spacecraft subsystems and payloads is normal.