Author Topic: ISRO Mars Orbiter Mission - Nov 2013 launch to September 2014 arrival - UPDATES  (Read 453589 times)

Offline Blackstar

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The correction in the trajectory of Mangalyaan was required to keep the power supply strong during the eclipse - caused by shadow of Mars falling on it for 7-8 hours - so that it could continue to function longer, as Mangalyaan's battery cannot support long-duration eclipse.


I give them credit--it looks like they did a very good job of working out the thermal cycles and other longevity issues for the spacecraft systems. No batteries blowing up or electronics dying on them.
« Last Edit: 01/21/2017 02:35 PM by Blackstar »

Offline plutogno

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Offline vyoma

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Isro-Mars orbiter mission life extended up to 2020

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The fate of the probe was in jeopardy as it was to face an eclipse during which dark shadows of the Red Planet was to fall on the satellite, denying its solar panels any light.

The on-board battery which was to take over had a life of just about 1.4 hours, while the eclipse was to last for 8 hours. The spacecraft's future was bleak.

The scientists thought of a solution. On the night of January 17, a team of eight engineers at Indian Space Research Organisation's Telemetry, Tracking and Command Network, Bengaluru, sent a time-delayed command to the Mars probe.

The command set in motion firing of eight on-board thruster rockets. Each of them were fired for 431 seconds, pushing the Mars Orbiter Mission (MOM) space probe to a new orbit that completely avoids an eclipse up to September 2017. The shadowing in September is of a smaller duration, which the satellite's batteries can handle.

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Last month's orbital manoeuvre exhausted almost 20 kg of fuel from the MOMís stock of 30 kg.

The remaining 13 kg of fuel, Kiran Kumar said, was sufficient for the rest of its life.
The 1,337 kg probe, designed and developed on a shoestring budget of Rs 450 crore, was inserted into the Martian orbit in September 2014.

Offline vineethgk

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Three linked Craters of Mars
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This image covers about  55 km x 55 km area with 28 m per pixel resolution in Margaritifer quadrangle of Mars.  This image portrays the envelope of three linked craters outer rims.

This MCC picture was taken on December 26, 2016 from an altitude of 534 km. This RGB image has been color enhanced for better visual appeal.

Offline vineethgk

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Observation of Suprathermal Argon in Mars Exosphere
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MENCA has discovered 'hot' (suprathermal) Argon in the exosphere of Mars. The words 'hot' as well as 'suprathermal' indicate that they are more energetic compared to the thermal populations and hence their kinetic temperatures are higher. These observations were conducted during December 2014, when periapsis of MOM was closest to the Mars.
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The presence of hot Argon atoms is revealed by the changes in its scale height in certain orbits. The increase inscale height indicates an increase in exospheric temperature, which in normal conditions is about 270 K while on orbits when hot argon is seen, the exospheric temperature is observed to be greater than 400 K. This increase in temperature is because of the significant presence of suprathermal neutral Argon atoms in the Martian exosphere. The discovery has important implications in the context of understanding the energy deposition in the Martian upper atmosphere and will help understand why the Martian atmospheric escape rates are higher than what was believed previously.

MENCA is a mass spectrometer, developed at Space Physics Laboratory of Vikram Sarabhai Space Centre at Thiruvananthapuram. MENCA is providing in-situ measurements of the neutral composition of the exosphere of Mars. MENCA has provided several measurements of the composition of the key species of the Martian neutral exosphere. Observations pertaining to the evening time exosphere of Mars, has already been published on May 02, 2016.

The above result has been published recently in the American Geophysical Union (AGU) journal Geophysical Research Letters vol. 44, 2017. doi:10.1002/2016GL072001.

Offline vyoma

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Offline vineethgk

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This image covers about  450 km x 450 km area with 220 m per pixel resolution in sinus Sabaeus quadrangle of Mars, having Bakhuysen Crater of 64 km diameter size qualifying for large basin impact structure candidate in the southern hemisphere. There are many small craters seen above and below these features.

This MCC picture was taken on May 27, 2017 from an altitude of 4406 km. This RGB image has been color enhanced/local contrast enhanced for better visual appeal.
Source

Offline vineethgk

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Away from all the limelight, little MOM completes 1000 Earth days in Martian orbit.

Mars Orbiter Mission Completes 1000 Days in Orbit
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Mars Orbiter Mission (MOM), the maiden interplanetary mission of ISRO, launched on November 5, 2013 by PSLV-C25 got inserted into Martian orbit on September 24, 2014 in its first attempt.  MOM completes 1000 Earth days in its orbit, today (June 19, 2017) well beyond its designed mission life of six months. 1000 Earth days corresponds to 972 Mars Sols (Martian solar day) and MOM completed 388 orbits.
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Satellite is in good health and continues to work as expected. Scientific analysis of the data received from the Mars Orbiter spacecraft is in progress.

..and an overview of its payloads and observations so far..

Online sanman

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I'm wondering if MOM will continue operating long enough to see the arrival of the next ISRO Mars mission?

Offline maint1234

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Sep 25, 2017
ISRO released MOM Second year science data
On the occasion of three year completion of Mars Orbiter Mission (MOM) in its Martian orbit on 24th Sept 2017, ISRO released MOM Second year science data from 24Sep-2014 to 23-Sep-2016 to public.

For more details visit https://mrbrowse.issdc.gov.in/MOMLTA

Does anyone have login access  to  ISRO ?

Offline maint1234

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"Global Shot of Mars taken by MOM
This image covers Mars Disc in a Perspective/Ortho view with 3.5 km per pixel resolution and obtained after the blackout period experienced by MOM.  Olympus mons, and three volcano systems Arsia mons, Pavonis mons, Ascraeus mons opposite to Olympus mons system are seen prominently in this shot.

This is the  latest picture by MCC on Oct 08, 2017 from an altitude of 70,157 km.  This RGB image has been color corrected for better visual appeal."
https://www.isro.gov.in/pslv-c25-mars-orbiter-mission/global-shot-of-mars-taken-mom

Offline Phil Stooke

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"Does anyone have login access  to  ISRO ?"


You don't need access to ISRO. Emily Lakdawalla of the Planetary Society has downloaded everything, converted it to more accessible formats and posted it with supporting information:

http://www.planetary.org/blogs/emily-lakdawalla/2017/1003-mom-mcc-data-release-2.html


(in the article are links to the new data and to the previous release a year ago)

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