Saturday 28 December 2013

COP-19,WARSAW CLIMATE CHANGE CONFERENCE-NOV 2013

COP-19, WARSAW CLIMATE CHANGE CONFERENCE

Guest article by Dr.Karthick,Tutor in Paediatrics,Dept of Paediatrics,Govt.Dharmapuri Medical College and Hospital.

COP 19, one more on the lines of progressive talks planned for collective action against the climate change ,which has been going on for the past two decades, was held in the phoenix city of warsaw. The main goal of COP 19 was to arrive at a constructive pause of the discussions, paving way for the Global Treaty on Climate Change to be signed at the crunch meeting in paris in 2015.The global agreement will be in effect after 2020.But before such an agreement can be signed, many conflicting issues are to be addressed and different blocks of countries are to be arrived for a satisfactory consensus.

To understand the issues clearly, it is needed to compare the reasons of climate change and the economic advantages and prices for different sections of the world. Climate Change in itself is not a newer concept but the causes and intensity of this present change is significantly newer. In the past, the factors responsible for climate change were Changes in the earth’s orbit, Sun Cycle, and Volcanic activity.But the present climate change is due to human activities like deforestation, burning of fossil fuels, synthetic fertilisers and animal farming on industrial scale. The causes are significant in the sense that it clearly differentiates the offenders and the victims and shows way for the victims to claim compensation from the benefitted sections of the world.

The developed countries ,like minded developing countries, small island nations, least developed countries are the different sections ,whose collective satisfaction alone can lead to a successful global treaty. But different sections have different claims and aspirations ,apart from the blame game towards each other, making the effective agreement’s process difficult. The stand by the developed countries is that their historical responsibility for climate change is no excuse for a common binding agreement for all and the concept of ‘common but differentiated responsibilities’ enshrined in the UNFCCC needs a change.

In this line, the modern talks were processed mostly to deviate the actions out of UNFCCC’s original principles and the non binding commitments  for developing countries set by KYOTO protocol. Even before Kyoto came into existence, the United States passéd the Byrd-Hagel resolution ,stating that it would not ratify any agreement, where the developing countries who were its economic competitors, were immune to binding commitments. These modern talks mainly started with Bali roadmap and ending with the Copenhagen Accord, the very next year. The accord was significant in one sense that it set newer path ,which mainly was intentional by the developed countries to take the focus away from UNFCCC’s original principles and making common binding commitments.

Like Minded Developing Countries, on the other hand are not ready for binding commitments and are always looking for the equitable sharing of responsibilities and advantages. It needs compensation from the earlier industrialised countries who reaped the economic benefits and also carbon space for their growing economies, especially the fossil rich china and india. They claim the equitable share in the carbon budget which is about 1000 Giga tonnes of carbon dioxide, if co2 alone is taken.

Despite these varied interests, Warshaw talks began with the aims of
*Effective implementation of previous COP decisions,
*Building of confidence in the process,
*Making progress on the way to new global agreement in 2015.
The results achieved were,
*Intended nationally determined contributions—This has come as a compromise for the original demand by developed countries for a clear timetable stating the commitments by all countries before the first quarter of 2015,and assessment by a transparent mechanism of their targets. But the developing countries opposed for an oversight by International agency and settled with their acceptance of ‘self determined contributions’.

*The key agenda in the conference was regarding ‘Loss and Damage’ involving some emotional speeches from the victim countries who were affected by the extreme weather events. The developed countries did not accept any liability to compensate for such disasters. But they settled with the setting up of ‘Warshaw International Mechanism’ which favours for the aid to the developing  countries by the developed countries to cope with losses from extreme weather events.

*The next issue of financial assistance was an important matter to encompass every successful move. It was originally decided in Copenhagen to commit $100bn per annum from the developed countries by 2020 ,to help developing countries adapt to the climate change through technology. But the mid term financial issues were not addressed, leaving 2012 to 2020 in vaccum. Also the Green Climate Fund which was accepted to be set up after 2009 was recognised to be operationalised but not capitalised. So,the aim of warshaw conference in building the confidence ,failed.

*The supportive talks in the COP19,which were accepted commonly by everyone was regarding agriculture. It was to keep agriculture away from the agreements and focussing mainly on the fossil fuels, keeping in mind the livelihoods of majority population in developing countries.

*REDD+ ,an initiative to use market and financial incentives to reduce emissions from deforestation and forest degradation gained some positives in the warshaw conference, with the countries pledging $100 mn to the adaptation fund. Coalition of Rainforest countries which was formed due to the neglect of forest conservation in Kyoto was instrumental in taking forward REDD+ from Bali Action Plan to Warshaw.

So,it can be said the three original aims of implementing past decisions, confidence building and making progress for next global treaty were all partly discussed with compromises, not arriving at any linear and conclusive decision .It hangs to hit the next geographical location of peru, next year with more expectations from the climate enthusiasts..

Science and Tech

How pricing of Crude oil done ?

  • Crude oil is priced using a market-based formula in which the price of a certain variety of crude oil is set as a differential to a certain marker or reference price.
  • Market referencing pricing of spot crude markets is based on spot such as West Texas Intermediate (WTI), Dated Brent and Dubai.
  • The price of a barrel of oil is dependent on both its grade—determined by factors such as its specific gravity and its sulphur content—and location.
  • WTI is a light sweet crude oil used as a benchmark in oil pricing and its properties and production sites makes it deal for being refined in the United States. 
  • Brent is also a sweet light crude oil, though not as light and sweet as WTI, and is sourced from the North Sea. 
  • Dubai crude has the highest sulphur content among the three and is considered to be heaviest.
  • Sweet and sour refers to the level of sulphur, an undesirable impurity. Sweet crude contains less sulphur and sour contains more.

Friday 27 December 2013

Polity

Cabinet clears constitutional status for Judicial Appointments Commission

  • The Union Cabinet on 26 Dec,2013, gave its nod for conferring constitutional status on the proposed Judicial Appointments Commission  for appointment and transfer of judges to the higher judiciary.
  • The Judicial Appointments Commission once created,will replace the collegium system of appointments to High court and Supreme court.
  • Article 124 (2) of the constitution will be amended to suggest that the president shall appoint judges on the ''recommendation'' of the JAC.
  • The constitution(120th Amendment) bill.2013 introduced by the UPA in parliament suggests the JAC's composition will be determined by ordinary law.
  • This law-the Judicial Appointments Commission bill,2013-suggests that the JAC will consists of three supreme court judges,the Union Law Minister.the Law Secretary as its convenor,and two''eminent persons''appointed by a body comprising the Prime Minister.Leader of the opposition and the Chief Justice of India.
  • As per the Union Cabinet's decision,however the composition as well as functions of the JAC will be incorporated into the constitution.
  • This will ensure the JAC'c terms cannot be modified but through a constitutional amendment requiring 2/3rd majority in parliament,as opposed to an ordinary law which requires a simple majority.
  • New Article 124 A of the constitution will define the Composition of the JAC.
  • Article 124 B will define its functions.
  • JAC Bill seeks to set up a six member body under the chairmanship of the Chief Justice of India for recommending names to the President of individuals with outstanding legal acumen and impeccable integrity and credibility for judgeship in the Supreme Court and the High Courts.
  • It would also recommend transfer of judges of one High Court to another.
  • The Constitution (120th Amendment) Bill, 2013, provides for the setting up of a Judicial Appointments Commission by inserting Article 124 (A) in the Constitution and amending Articles 124(2), 217(1) and 222(1).





PERSONS IN NEWS

PERSONS IN NEWS

Nawaz Sharif                -- Pakistan's PM (Richest                                               elected representative in                                             Pakistan )  
Shinzo Abe                   -- Japan's PM
Xi Jinping                     -- China's President
Hailemariam Desalegn  -- Ethiopia's PM
Salva Kiir                     -- South Sudan's President
Uhuru Kenyatta            -- Kenya's President
Recep Tayyip Erdogan   -- Turkey's PM

Titbits

  • M.B.Shah Commission --Report on illegal iron and manganese ore mining.

          

Thursday 26 December 2013

Indian Culture


Konyak Naga tribesmen display head hunting techniques in Kisama village on the outskirts of Kohima city, during the Hornbill Festival, on Tuesday. Konyak Nagas are known for their strong warrior tradition.— Photo: Ritu Raj Konwar

Cultural extravaganza

Konyak Naga tribesmen

display head hunting

techniques in Kisama

village on the outskirts of

Kohima city, during the

Hornbill Festival, on Dec

3,2013.

 Konyak Nagas are known for their strong warrior tradition.

Saturday 21 December 2013

Science and Tech


FLYING HIGH:Tejas performing at the Initial Operational Clearance function at the HAL Airport in Bangalore on Friday.— Photo: G.P. Sampath Kumar

Tejas an ideal replacement for MiG

  • The aircraft gets initial clearance for joining IAF, 30 years after the project was sanctioned.
  • Tejas is a Light Combar Aircraft.
  • It is tailless,multi role fighter aircraft.
  • Power by a single engine.
  • Tejas has night vision goggles combatible-Glass cock pit

 

Sunday 15 December 2013

China's probe land on moon

China probe lands on Moon

Third country after the U.S. and the erstwhile Soviet Union to achieve a “soft landing

  • China on Saturday ( December 14 2013) for the first time landed a rover on the Moon — the first country to do so since 1976 — marking a landmark for the country’s fast-developing space programme.
  • A lunar probe carrying the “Jade Rabbit” or Yu Tu rover landed in the Bay of Rainbows, or Sinus Iridum, on the Moon’s surface, 12 days after the Chang’e-3 probe — the country’s third major lunar mission — blasted off from southwestern China.
  • China becoming the third country after the United States and the erstwhile Soviet Union to achieve a “soft landing”.
  • China’s mission is more advanced, having “designed the suspension and obstacle-avoiding phases to survey the landing area much more precisely through fitted detectors”. The rover will spend the next few weeks exploring the lunar surface.


Saturday 14 December 2013

International News

Air Defence Identification Zone (ADIZ)- Recent controversies and its meaning.


Recently .China has announced that it now had an Air Defence Identification Zone (ADIZ) in the East China Sea. 

What is an ADIZ?
  • It’s a section of international airspace over which a country declares its right to identify aircraft, ostensibly to protect itself from foreign threat. 
  • It’s a product of customary international law but it’s not jurisdictional.
What happens once an ADIZ is established?
  • A country would use radar to detect unexpected aircraft flying in the ADIZ and observe them. 
  • This would sort some, if not most, into the category of being unthreatening. 
  • Using radio, it would query those it was concerned about. 
  • The country may ask who they are and what they are doing. 
  • If they are not a security threat, that would be sufficient. 
  • If the country was still not sure, it would launch an aircraft to intercept and observe.
  • The country would not have the authority to do anything else unless it thought the aircraft was a direct threat to the country.
What’s the problem with China declaring an ADIZ?
  •  The problem is that China’s ADIZ overlaps with the ADIZ that was created by the U.S. after World War-II and transferred to Japan in 1969.
  •  Japan sees this as an affront to its sovereignty.
  •  The bigger problem is that China’s ADIZ encompasses the Diaoyu/Senkaku islands claimed by both China and Japan. 
  • This is the first time an overlapping ADIZ has been declared in an area where there is a sovereignty dispute. As a result, with China monitoring the space, and the U.S. and China’s neighbours defying it, there is now an increased risk of either a deliberate or accidental incident involving military aircraft. 
  • Some are also concerned that China thinks the ADIZ will strengthen its claim over the Diaoyu/Senkaku islands.



Thursday 5 December 2013

CIVIL SERVICES MAINS 2013,ESSAY AND GENERAL STUDIES -1 & 2 QUESTION PAPER

CIVIL SERVICES MAINS-2013 

QUESTION PAPER

ESSAY

Write an essay on any of the following 

topics in not more than 2500 Words (Word

 Limit Should Be Strictly Adhered)

1. “Be The Change You Want To See In Others” 

– Gandhiji

2. Is The Colonial Mentality Hindering India’s 

Success?

3. GDP (Gross Domestic Product) Along with 

GDH (Gross Domestic Happiness) Would Be 

The Right Indices For Judging The Well-being Of 

A Country

4. Science and Technology Is The Panacea For 

The Growth and Security Of The Nation

GENERAL STUDIES PAPER-1
general studies 2013 mains paper 1
general studies 2013 mains paper 1
general studies 2013 mains paper 1
general studies 2013 mains paper 1

GENERAL STUDIES PAPER-2

general studies paper 2 upsc mains 2013 question paper
general studies 2013 mains question paper 2
general studies 2013 mains question paper 2
general studies 2013 mains question paper 2
general studies 2013 mains question paper 2
general studies 2013 mains question paper 2
general studies 2013 mains question paper 2

Friday 29 November 2013

Science and Tech

Contaminant in baby formula killed by garlic

S. SIVA SARAVANANA first ever study has identified two compounds derived from garlic — diallyl sulfide and ajoene — that significantly reduce the contamination risk ofCronobacter sakazakii in the production of dry infant formula powder.




Supernova remnant hit by Mach 1,000 wave

APStudying the star Tycho's supernova remnant, astronomers have discovered that a reverse shock wave racing inward at Mach 1,000 (1,000 times the speed of sound) is heating the remnant and causing it to emit X-ray light.



Saturday 16 November 2013

SACHIN TO RECEIVE BHARAT RATNA


Sachin Tendulkar

SACHIN TO RECEIVE BHARAT RATNA

In a fitting finale to what has been a glorious career, batting maestro Sachin Tendulkar was on Saturday chosen for the prestigious Bharat Ratna, the country's highest civilian award, making him the first sportsperson to be bestowed with the honour.

The 40-year-old icon, who called time on his glittering international career today, was chosen for the top award soon after his farewell Test against the West Indies ended in Mumbai.
A brief statement issued by Rashtrapati Bhavan spokesperson Venu Rajamony said the President has awarded the Bharat Ratna to Tendulkar, who retired from the International cricket on Saturday.

Tendulkar bows out as the most successful batsman in international cricket with 15,921 runs in 200 Tests. In his ODI career, which he needed last year, Tendulkar amassed 18,426 runs in 463 matches.

The Mumbaikar is the only batsman in international cricket to score 100 centuries. He was the first batsman to get a double hundred in one-dayers.

The award is a perfect send off gift to Tendulkar whose career spanned 24 years making him an inspiration for an entire generation of cricketers.

There have been continuous demands for him to be conferred the honour for a long time and the eligibility criteria of the award was revised last year to accommodate sportspersons as well.

Tendulkar, who became the first active sportsperson to become a Rajya Sabha member last year, is being given the honour along with Professor C N R Rao, the man behind India's maiden Mars mission.

The Bharat Ratna is being conferred after a gap of years with classical vocalist Pandit Bhimsen Joshi being the last recipient
.

Friday 15 November 2013

TRIBUTE TO SACHIN RAMESH TENDULKAR

  • Sachin Tendulkar, the most prolific batsman in international cricket, walked on to the field to a rousing reception from his home crowd at the Wankhede Stadium on Friday.
    PTISachin Tendulkar, the most prolific batsman in international cricket, walked on to the field to a rousing reception from his home crowd at the Wankhede Stadium on Friday.
  • Rohit Sharma plays a shot during the second day of the second test match against West Indies at Wankhede Stadium in Mumbai on Friday. Photo: K.R. Deepak
    The HinduRohit Sharma plays a shot during the second day of the second test match against West Indies at Wankhede Stadium in Mumbai on Friday. Photo: K.R. Deepak
  • Rohit Sharma celebrates his century against West Indies on Day 2 of the final Test at Wankhede Stadium in Mumbai on Friday.
    PTIRohit Sharma celebrates his century against West Indies on Day 2 of the final Test at Wankhede Stadium in Mumbai on Friday.
  • Rohit Sharma scored a brilliant unbeaten 111 with the help of tailenders as India tightened its grip over West Indies during the second day of the second Test at Wankhede Stadium in Mumbai. File photo
    PTIRohit Sharma scored a brilliant unbeaten 111 with the help of tailenders as India tightened its grip over West Indies during the second day of the second Test at Wankhede Stadium in Mumbai. File photo
  • Sachin Tendulkar and Cheteshwar Pujara run between the wicket during their 144-run partnership in the second test at Wankhede stadium on Friday. Photo: Vivek Bendre
    The HinduSachin Tendulkar and Cheteshwar Pujara run between the wicket during their 144-run partnership in the second test at Wankhede stadium on Friday. Photo: Vivek Bendre
  • Sachin Tendulkar acknowledges cheers from crowd after his fifty during the second Test between India and West Indies at the Wankhede stadium, in Mumbai on Friday. Photo: Vivek Bendre
    The HinduSachin Tendulkar acknowledges cheers from crowd after his fifty during the second Test between India and West Indies at the Wankhede stadium, in Mumbai on Friday. Photo: Vivek Bendre

Magnificient career ( 15 Nov 1989 to 15 Nov 2013 ) has come to an end after 24 years.No doubt SACHIN RAMESH TENDULKAR is greatest of all time in cricket.Sachin has made India proud.Thank u Sachin Sir, for all these entertainment you have given for the cricket fans all around the world.We are lucky that we are born in Sachin's cricket era.. . 


Batting maestro Sachin Tendulkar enthralled with a majestic 74 in his farewell knock as India put themselves on course for a clean-sweep by taking a mammoth 313-run first innings lead in the second and final cricket Test against the West Indies in Mumbai on Friday.
Millions of Tendulkar’s adoring fans waited for a last magical knock from his blade as the 40-year-old batting legend walked into the ground to resume his innings at an overnight 38. He seemed to be in a positive frame of mind as he played an array of breathtaking shots much to the delight of a packed Wankhede stadium.
But the dream three-figure mark eluded the champion batsman in his farewell match.
It was Tendulkar who hogged the limelight for the second day running with a sublime knock which included some of his trademark shots, which got rousing cheers from the crowd and a host of VVIPs including Congress vice-President Rahul Gandhi, state chief minister Prithviraj Chavan and Bollywood superstars Aamir Khan and Hrithik Roshan.
Silence descended at the Wankhede when Tendulkar was dismissed when he thick-edged a Deonarine delivery to Darren Sammy at first slip. The crowd quickly recomposed itself to give Tendulkar a standing ovation as he trudged off the ground one last time.
Starting the day on 38, Tendulkar looked fluent during his 68-minute stay at the wicket on the day. He faced 118 balls in all hitting 12 boundaries, all of which were pure class.
He added 148 runs for the second wicket with Pujara, who hit a patient 113 en route his fifth Test century. Pujara hit 12 fours in his 167 ball knock. Rohit hit a classy unbeaten knock of 111 which came off 127 deliveries laced with 11 fours and three sixes.
On Friday, all roads led to the Wankhede Stadium in anticipation of a century but on 74, it was offie Narsingh Deonarine, who got one to bounce that bit extra as Tendulkar tried a cut shot which ended in rival captain Darren Sammy’s hands in the first slip.
Deonarine’s name will certainly feature in the record books for years to come as it is unlikely that West Indies will be able to get India bat second time on a pitch that has shown considerable wear and tear.
However, the time he was at the crease was pure unbridled joy for all those who witnessed a ‘Vintage Tendulkar’ on display.
With Pujara playing an ideal second fiddle by rotating the strike, Tendulkar played some delightful strokes that were taken out of the top drawer.
His late cut off Shane Shillingford, a backfoot punch through the covers off Tino Best and the drive past Best that brought up his half-century were pure class. It was Tendulkar’s 68th Test half-century that came in 91 deliveries.
Best, who first tried to unsettle Tendulkar with bouncers and then with verbal volleys surrendered in the end as he had hands on his knees at the end of one of his overs.
It was Tendulkar who gave him a friendly pat on the shoulders probably to remind “who’s the boss today“.
The hallmark of Tendulkar’s innings was his assured footwork, leaving a lot of fuller deliveries outside the off-stump and getting the body behind the ball while executing those drives.
Probably, being pressure-free helped him to go for his shots as each and every stroke-attack or defence were lustily cheered by a vociferous crowd.


Saturday 9 November 2013

ISRO'S MARS MISSION ( SCIENCE AND TECH )








                       ISRO'S MISSION TO MARS

ON November 5, the workhorse launcher of the Indian Space Research Organisation (ISRO), the Polar Satellite Launch Vehicle (PSLV),has launched successfully the spacecraft for the organisation’s maiden mission to Mars in its uprated and extended configuration PSLV-XL.The official announcement for this mission was made on August 15, 2012, by Prime Minister Manmohan Singh in his Independence Day speech.


  •                       HIGHLIGHTS


  • PSLV has delivered the orbiter in an elliptical 250 km x 23,500 km parking orbit around the earth.
  • The mass of the orbiter satellite is 1,350 kg, 
  • It carries nearly 852 kg of fuel, that is, a combination of mono methyl hydrazine (MMH) and mixed oxides of nitrogen (MON3)—fuel and oxidiser respectively.
  • The apogee of the orbit will gradually be raised,with five burns of the spacecraft’s main engine, the Liquid Apogee Motor (LAM), which would bring the spacecraft to the final earth-bound orbit of about 600 km x 2,00,000 km with an orbital period of 95.5 hours.
  • From here the spacecraft will enter a Mars transfer trajectory (MTT) at an appropriate time so that Mars can be reached with minimum fuel consumption.
  • The mission life is targeted for six months. However, there is a possibility of extending this lifetime.
  • The spacecraft has to travel a distance of about 690 million km (Mkm) to reach Mars, which will take 300 days. This brings with it far greater challenges in propulsion, navigation and communication.
  • One ground station at Byalalu [near Bangalore] as our deep-space ground station, which has been augmented from 2 kilowatt to 20 kw of power.
  • Functions of the five instruments on board the Mars orbiter

  1. Methane sensor- study about the likelihood of the presence of methane there [which is an indicator of possible life on the planet]. 
  2. Thermal infrared sensor-Studies the origin of the methane, whether it comes from a biological or a geological process.  It will give information on the geological activity on Mars.
  3. The Lyman Alpha Photometer-It will look at the escape processes of deuterium and hydrogen.
  4.  Martian Exospheric Neutron Composition Analyser, or MENCA,-It will look at the exosphere of Mars.
  5. Mars colour camera -For optical imaging of the surface of Mars.
Methane sensor and Thermal infrared sensor was made by Space Application Centre, Ahmedabad.
Lyman Alpha Photometer was made by Laboratory for Electro-Optic Systems (LEOS), Bangalore,
 Martian Exospheric Neutron Composition Analyser, or MENCA was made by Space Physics Laboratory, Thiruvananthapuram.



A primary consideration in all Mars missions is reaching the planet by expending the least amount of energy or fuel. This is achieved by sending the spacecraft along a trajectory called the Hohmann Transfer Orbit or Minimum Energy Transfer Orbit.

From the final earth-bound orbit, the spacecraft will leave the earth in a hyperbolic trajectory in a direction tangential to the earth’s orbit. This is the MTT along which the spacecraft will escape from the earth’s sphere of influence (SOI) with a velocity equal to the earth’s orbital velocity plus the cumulative boost (Δv) of about 1.5 km/s given by the five LAM firings (880 m/s) and the sixth LAM firing into trans-Mars injection (640 m/s).

The earth’s SOI extends up to about 1 Mkm and that of Mars extends up to about 0.6 Mkm. 

 In this trans-Mars trajectory, the spacecraft will be primarily under the influence of the sun; that is, from the geocentric phase it will now be in the heliocentric phase. It will take 10 months of journey in this phase before it enters the Mars’ orbit tangentially

The possibility of encountering Mars at that exact moment of the spacecraft’s intersection with Mars’ orbit depends on the relative positions of the earth, Mars and the sun. When the configuration of these three bodies is such that they form an angle of approximately 44°, this becomes possible, and this occurs a few days before or after the time of closest approach of Mars to the earth, which distance is about 55 Mkm.

 Such a configuration recurs periodically at intervals of about 780 days (about 26 months). In the case of the earth-Mars system, minimum energy opportunities occur only if the spacecraft launch takes place in November 2013, January 2016 or May 2018.

A straight line may not be the most energy-efficient way to reach Mars. This is because the straight line translates into a huge, inefficient orbit around the sun. To put the spacecraft in such an extreme solar orbit would require enormous amounts of energy and fuel. The minimum energy transfer path is a much longer one.

The propulsion requirements and associated challenges for the minimum energy transfer to Mars and subsequent capture include orbit raising, trans-Mars injection, three mid-course corrections and finally arresting the spacecraft for capture.

Once injected into the MTT, the mission sequence requires three mid-course corrections to be made to the trajectory and the last correction to be carried out about 15 days before the spacecraft’s capture into the Martian orbit so that an accuracy of ±50 km is achieved in the rendezvous.

 The final Mars Orbit Injection (MOI) is achieved by a braking or de-boost manoeuvre of about 1.1 km (a negative Δv) at the periapsis (closest approach to Mars) of the hyperbolic MTT. This, in fact, is the largest incremental (albeit negative) velocity, which means the MOI will demand the longest retro firing of LAM and it will have to deliver after lying idle for 300 days.

Together, with the incremental velocity of 1.5 km/s given up to trans-Mars injection, the magnitude of the cumulative incremental velocity required of LAM is thus 2.6 km/s. The spacecraft will enter the Martian orbit in September 2014. The size of the spacecraft’s Martian orbit will be, as mentioned earlier, 377 km x 80,000 km and its orbital period will be 3.66 days.

The LAM that will be used in this mission, both for orbit raising and MOI, is the same 440 Newton thruster that is used in geostationary satellite launches by ISRO. 

The first operation of orbit raisings is limited to the first one week. But MOI is only after 300 plus days of MTT.

 Once the valves get wetted by the propellant, they can swell a little bit and the performance will come down. They may also begin to leak. So the strategy that has been adopted is to close this path after orbit raisings, isolate the engine by operating pyro valves and open additional flow lines and valves when restarting the engine 10 months later to take care of the problem. The engine has been tested for its performance for a given number of days after use.


 

The PSLV-XL will deliver the spacecraft in an elliptical orbit of 250 km x 23,500 km. This orbit, by design, will have an inclination of 17° and an argument of perigee (AOP) of about 280°. 

 (AOP is the angle between the spacecraft orbit’s perigee, the point of closest approach from the earth, and the orbit's ascending node, the point where the body crosses the plane of the Equator from south to north. The angle is measured in the orbital plane and in the direction of motion. Essentially, it is the relative orientation of the spacecraft’s elliptical orbit with respect to the equatorial plane.)

 Unlike normal launches where the AOP is 180°, this highly unusual orientation is dictated by the following consideration pertaining to the Mars mission.From the perspective of the mission plan and objectives, the desired inclination of the spacecraft’s Martian orbit is about 30° with respect to the Martian equator.

To reach that along the minimum energy path, the spacecraft needs to be launched in its parking orbit around the earth with the correct AOP. If the spacecraft’s orbit around the earth does not have this correct orientation at launch, the desired Martian orbit can still be achieved, but at the expense of more energy.

Since every day the relative positions of the planets are changing, depending on the day and time of the launch, the argument of perigee will also change.

The November 5 launch, had the AOP of 282°

Because of the considerations of a minimum energy transfer into the Martian orbit, the date for trans-Mars injection from the spacecraft’s earth-bound orbit is fixed. This date is November 27 and it will get out of the earth’s SOI on November 30. The launch window available for the mission was October 21 to November 19.

 The spacecraft will, therefore, have to make several earth-bound orbits before its injection into the MTT. Therefore, the spacecraft will pass through the high-radiation environment of high-energy electrons in the Van Allen belts surrounding the earth, twice for each orbit. And, the earlier the launch, the more will be the number of such orbits and transits through the Van Allen belts. 

 The spacecraft’s components have been designed for the maximum cumulative radiation dose expected on each component. For a maximum of 60 passes through the radiation belts, it has been worked out to be 6 krad. Thus, radiation hardening or radiation shielding has been provided to the components such that they can withstand 12 krad (margin of a factor of 2) with a 22 AWG aluminium shielding. 

Originally, the launch date had been fixed as October 28. But because of adverse weather conditions over the Bay of Bengal, it was postponed by a week to November 5. This would, of course, mean that the spacecraft will have to make fewer transits through the Van Allen belts and, correspondingly, the radiation dose will be lower.
The number of earth-bound orbits will now be only 19, which means 38 passes through the radiation belts.

Compared to the previous PSLV missions, here there is a long coasting phase between the third stage (PS3) burn-out and the fourth stage (PS4) ignition. This is to achieve the correct argument of perigee at the time of the spacecraft’s injection from PS4. The coasting phase is increased by about 20 minutes. “This is the largest coasting phase that ISRO has ever had.

 Owing to the long coasting phase, ground stations are required in the Pacific to monitor the PS4 ignition, its burn-out and the spacecraft injection. For this, two ship-borne terminals (Nalanda and Yamuna) have been placed in the Pacific, at about 3,000 nautical miles from Fiji. (It is the delay in one of these ships reaching its destination due to bad weather that led to the postponement of the October 28 launch.)

 In these 20 minutes there is also a phase where, because of the position, there will be no telemetry in real time for about a few minutes, but the ship-borne stations will take charge. Also, there will be some cooling, and mechanisms such as the solar panel deployment, soon after the spacecraft’s injection, have to operate at negative temperatures of -20 °Celsius. The mechanisms themselves have been tested for -60 °C.

Communication challenges 

Besides, the radio-silence period during the launch and the communication challenges at crucial phases of the mission arise from the distances involved.

 For instance, at the time of capture into the Martian orbit, the communication range or the line of sight distance from the earth is about 230 Mkm. Once in the Martian orbit, given the fact that the distance between the earth and Mars vary, and also because the spacecraft orbit is highly elliptical, the communication range varies from a minimum of 60 Mkm to a maximum of 380 Mkm.

Correspondingly, time delays in two-way communication will vary from 6.8 min to 43 min. This is the time that will be taken for a command from the earth to reach the spacecraft and receive the response. A command cannot be given and corrected in real time, so some storage is required. What has been done, therefore, is to provide the satellite with an on-board three-level in-built autonomous capability, which is a new challenge for ISRO. These include autonomously switching over from primary to redundant systems, self-generation of appropriate commands when a certain expected command is not received from the earth, and bringing the spacecraft to a “safe mode” when it is in a non-normal condition and enable intervention from the earth.

Challenges from power requirements also arise because the orbit of Mars is farther from the sun. The average solar flux at Mars is 598 W/m (watts per square metre), which is 42 per cent of what the earth receives in its orbit. Also, because of the highly eccentric orbit, the solar flux varies by ± 19 per cent during a Martian year compared with 3.5 per cent on the earth. To compensate for this lower solar irradiance, the orbiter spacecraft is equipped with three solar panels of size 1.8 m x 1.4 m generating a total of 840 watts in the Martian orbit. A single 36 Ah (ampere hour) lithium ion battery will provide power during eclipse phases during the geocentric phase and in the Martian orbit.

Scientific payload 

 The scientific payload has limited mass of 15 kg that MOM carried  three instrument packages with a total of five instruments. 

 MOM includes experiments that had not been carried out before by other missions.In particular, the methane sensor has not been carried by other nations in the past and the National Aeronautics and Space Administration’s (NASA) MAVEN, which will travel to Mars almost simultaneously with MOM, too, does not carry one. Methane would provide the evidence for biological processes on the planet.

NASA’s Mars rover Curiosity, that there is no evidence of methane on Mars does not mean that there is no methane on the planet because Curiosity is only exploring one region of the planet.

But it should not come as a surprise if MOM does return evidence for methane. 
 Mars has two satellites and one of them called Phobos, is likely to be in the vicinity of the Mars orbiter and we will study Phobos from our orbiter. 

There is a comet likely to pass by the side of Mars at a distance of 50,000 km. NASA [National Aeronautics and Space Administration] scientists have forecast this. If this should happen, it will be another opportunity to observe the comet.


  •  The success rate of international missions to Mars is only 42 per cent.

Russia's Phobos Grunt Mission to Mars was a failue in 2011.
China's Mars mMission,Yinghuo-1 in 2011 was also a failure.