Tag: Indian Space Research Organisation

No Space Age for us

There’s a 500-word section on the Wikipedia page for the NASA Space Shuttle that describes the markings on the programme’s iconic orbiter vehicle (OV). Specifically, it talks about where the words ‘NASA’ and ‘USA’ appeared on the vehicle’s body, if there were any other markings, as well as some modifications to how the flag was positioned. Small-time trivia-hunters like myself love this sort of thing because, whether in my imagination or writing, being able to recall and describe these markings provides a strong sense of character to the OV, apart from making it more memorable to my readers as well as myself.

These are the symbols in our memories, the emblem of choices that weren’t dictated by engineering requirements but by human wants, ambitions. And it’s important to remember that these signatures exist and even more so to remember them because of what they signify: ownership, belonging, identity.

Then again, the markings on an OV are a part of its visual identity. A majority of humans have not seen the OV take off and land, and there are many of us who can’t remember what that looked like on TV either. For us, the visual identity and its attendant shapes and colours may not be very cathartic – but we are also among those who have consumed information of these fascinating, awe-inspiring vehicles through news articles, podcasts, archival footage, etc., on the internet. There are feelings attached to some vague recollections of a name; we recall feats as well as some kind of character, as if the name belonged to a human. We remember where we were, what we were doing when the first flights of iconic missions took off. We use the triggers of our nostalgia to personalise our histories. Using some symbol or other, we forge a connection and make it ours.

This ourness is precisely what is lost, rather effectively diluted, through the use of bad metaphors, through ignorance and through silence. Great technology and great communication strive in opposite directions: the former is responsible, though in only an insentient and mechanistic way, for underscoring the distance – technological as much as physical – between starlight and the human eye that recognises it; the latter hopes to make us forget that distance. And in the absence of communication, our knowledge becomes clogged with noise and the facile beauty of our machines; without our symbols, we don’t see the imprints of humanity in the night sky but only our loneliness.

Such considerations are far removed from our daily lives. We don’t stop (okay, maybe Dennis Overbye does) to think about what our journalism needs to demand from history-making institutions – such as the Indian Space Research Organisation (ISRO) – apart from the precise details of those important moments. We don’t question the foundations of their glories as much as enquire after the glories themselves. We don’t engender the creation of sanctions against long-term equitable and sustainable growth. We thump our chests when probes are navigated to Mars on a Hollywood budget but we’re not outraged when only one scientific result has come of it. We are gratuitous with our praise even when all we’re processing are second-handed tidbits. We are proud of ISRO’s being removed from bureaucratic interference and, somehow, we are okay with ISRO giving access only to those journalists who have endeared themselves by reproducing press releases for two decades.

There’s no legislation that even says all knowledge generated by ISRO lies in the public domain. Irrespective of it being unlikely that ISRO will pursue legal action against me, I do deserve the right to use ISRO’s findings unto my private ends without anxiety. I’m reminded every once in a while that I, or one of my colleagues, could get into trouble for reusing images of the IRNSS launches from isro.gov.in in a didactic video we made at The Wire (or even the image at the top of this piece). At the same time, many of us are proponents of the open access, open science and open knowledge movements.

We remember the multiwavelength astronomy satellite launched in September 2015 as “India’s Hubble” – which only serves to remind us how much smaller the ASTROSAT is than its American counterpart. How many of you know that one of the ASTROSAT instruments is one of the world’s best at studying gamma-ray bursts? We discover, like hungry dogs, ISRO’s first tests of a proto-RLV as “India’s space shuttle”; when, and if, we do have the RLV in 2030, wouldn’t we be thrilled to know that there is something wonderful about it not just of national provenance but of Indian provenance, too?

Instead, what we are beginning to see is that India – with its strapped-on space programme – is emulating its predecessors, reliving jubilations from a previous age. We see that there is no more of an Indianess in them as much as there is an HDR recap of American and Soviet aspirations. Without communication, without the symbols of its progress being bandied about, without pride (and just a little bit of arrogance thrown in), it is becoming increasingly harder through the decades for us – as journalists or otherwise – to lay claim to something, a scrap of paper, a scrap of attitude, that will make a part of the Space Age feel like our own.

At some point, I fear we will miss the starlight for the distance in between.

Update: We are more concerned for our machines than for our dreams. Hardly anyone is helping put together the bigger picture; hardly anyone is taking control of what we will remember, leaving us to pick up on piecemeal details, to piece together a fragmented, disjointed memory of what ISRO used to be. There is no freedom in making up your version of a moment in history. There needs to be more information; there need to be souvenirs and memorabilia; and the onus of making them needs to be not on the consumers of this culture but the producers.

An identity for ISRO through a space agreement it may or may not sign

Indians, regardless of politics or ideology, have a high opinion of the Indian Space Research Organisation (ISRO). Conversations centred on it usually retain a positive arc, sometimes even verging on the exaggerated in lay circles – in part because the organisation’s stunted PR policies haven’t given the people much to go by, in part because of pride. Then again, the numbers by themselves are impressive: Since 1993, there have been 32 successful PSLV launches with over 90 instruments sent into space; ISRO has sent probes to observe the Moon and Mars up close; launched a multi-wavelength space-probe; started work on a human spaceflight program; developed two active launch vehicles with two others still in the works; and it is continuing its work on cryogenic and scramjet engines.

The case of the cryogenic engine is particularly interesting and, as it happens, relevant to a certain agreement that India and the US haven’t been able to sign for more than a decade now. These details and more were revealed when a clutch of diplomatic cables containing the transcript of conversations between officials from the Government of India, ISRO, the US Trade Representative (USTR) and other federal agencies surfaced on Wikileaks in the week of May 16. One of themdelineates some concerns the Americans had about how the Indian public regarded US attempts to stall the transfer of cryogenic engines from the erstwhile USSR to India, and the complications that were born as a result.

In 1986, ISRO initiated the development of a one-tonne cryogenic engine for use on its planned Geosynchronous Satellite Launch Vehicle (GSLV). Two years later, an American company offered to sell RL-10 cryogenic engines (used onboard the Atlas-Centaur Launch Vehicle) to ISRO but the offer was turned down because the cost was too high ($800 million) and an offer to give us the knowhow to make the engines was subject to approval by the US government, which wasn’t assured. Next, Arianespace, a French company, offered to sell two of its HM7 cryogenic engines along with the knowhow for $1,200 million. This offer was also rejected. Then, around 1989, a Soviet company named Glavkosmos offered to sell two cryogenic engines, transfer the knowhow as well as train some ISRO personnel – all for Rs.230 crore ($132 million at the time). This offer was taken up.

However, 15 months later, the US government demanded that the deal be called off because it allegedly violated some terms of the Missile Technology Control Regime, a multilateral export control regime that Washington and Moscow are both part of. As U.R. Rao, former chairman of ISRO, writes in his book India’s Rise as a Space Power, “While the US did not object to the agreement with Glavkosmos at the time of signing, the rapid progress made by ISRO in launch vehicle technology was probably the primary cause which triggered [the delayed reaction 15 months later].” Officials on the Indian side were annoyed by the threat because solid- and liquid-fuel motors were preferred for use in rockets – not the hard-to-operate cryogenic engines – and because India had already indigenously developed such rockets (a concern that would be revived later). Nonetheless, after it became clear that the deal between Glavkosmos and ISRO wouldn’t be called off, the US imposed a two-year sanction from 1992 that voided all contracts between ISRO and the US and the transfer of any goods or services between them.

Remembering the cryogenic engines affair

This episode raised its ugly head once again in 2006, when India and the US – which had just issued a landmark statement on nuclear cooperation a year earlier – agreed on the final text of the Technical Safeguards Agreement (TSA) they would sign three years later. The TSA would “facilitate the launch of US satellite components on Indian space launch vehicles”. At this time, negotiations were also on for the Commercial Space Launch Agreement (CSLA), which would allow the launch of American commercial satellites onboard Indian launch vehicles. The terms of the CSLA were derived from the Next Steps in Strategic Partnership (NSSP), a bilateral dialogue that began during the Vajpayee government and defined a series of “quid-pro-quos” between the two countries that eventually led to the 2005 civilian nuclear deal. A new and niggling issue that crept in was that the US government was attempting to include satellite services in the CSLA – a move the Indian government was opposed to because it amounted to shifting the “carefully negotiated” NSSP goalposts.

As negotiations proceeded, the cable, declassified by the then US ambassador David Mulford, reads:

“Since the inception of the NSSP, reactionary holdouts within the Indian space bureaucracy and in the media and policy community have savaged the concept of greater ties with the US, pointing to the progress that India’s indigenous programs made without assistance from the West. The legacy of bitterness mingled with pride at US sanctions continues in the present debate, with commentators frequently referring to US actions to block the sale of Russian cryogenic engines in the 1990s as proof that American interest continues to focus on hobbling and/or displacing India’s indigenous launch and satellite capabilities.”

The timing of the Glavkosmos offer, and the American intervention to block it, is important when determining how much the indigenous development of the cryogenic upper stage in the 2000s meant to India. After ISRO had turned down Arianespace’s HM7 engines offer, it had decided to develop a cryogenic engine from scratch by itself over eight years. As a result, the GSLV program would’ve been set back by at least that much. And it was this setback that Glavkosmos helped avoid (allowing the GSLV development programme to commence in 1990). Then again, with the more-US-friendly Boris Yeltsin having succeeded Mikhail Gorbachev in 1991, Glavkosmos was pressurised from the new Russian government to renegotiate its ISRO deal. In December 1993, it was agreed that Glavkosmos would provide four operational cryogenic engines and two mockups at the same cost (Rs.230 crore), with three more for $9 million, but without any more technology transfer.

The result was that ISRO had to fabricate its own cryogenic engines (with an initial investment of Rs.280 crore in 1993) with little knowledge of the challenges and solutions involved. The first successful test flight happened in January 2014 on board the GSLV-D5 mission.

So a part of what’re proud about ISRO today, and repeatedly celebrate, is rooted in an act whose memories were potential retardants for a lucrative Indo-US space deal. Moreover, they would also entrench any concessions made on the Indian side in a language that was skeptical of the Americans by default. As the US cable notes:

“While proponents point to ISRO’s pragmatism and scientific openness (a point we endorse), opponents of the [123] nuclear deal have accused ISRO of selling out India’s domestic prowess in space launch vehicles and satellite construction in order to serve the political goal of closer ties with the US. They compare ISRO’s “caving to political pressure” unfavorably with … Anil Kakodkar’s public statements drawing a red line on what India’s nuclear establishment would not accept under hypothetical civil-military nuclear separation plans.”

How do we square this ‘problematic recall’ with, as the same cable also quotes, former ISRO chairman G. Madhavan Nair saying a deal with the US would be “central to India’s international outreach”? Evidently, agreements like the TSA and CSLA signal a reversal of priorities for the US government – away from the insecurities motivated by Cold-War circumstances and toward capitalising on India’s rising prominence in the Space Age. In the same vein, further considering what else could be holding back the CSLA throws more light on what another government sees as being problematic about ISRO.

Seeing the need for the CSLA

The drafting of the CSLA was motivated by an uptick in collaborations between Indian and American entities in areas of strategic interest. The scope of these collaborations was determined by the NSSP, which laid the groundwork for the civilian nuclear deal. While the TSA would allow for American officials to inspect the integration of noncommercial American payloads with ISRO rockets ahead of launch, to prevent their misuse or misappropriation, it wouldn’t contain the checks necessary to launch commercial American payloads with ISRO rockets. Enter CSLA – and by 2006, the Americans had started to bargain for the inclusion of satellite services in it. (Note: US communications satellites are excluded from the CSLA because their use requires separate clearances from the State Department.)

However, the government of India wasn’t okay with the inclusion of satellite services in the CSLA because ISRO simply wasn’t ready for it and also because all other CSLAs that the US had signed didn’t include satellite services. The way S. Jaishankar – who was the MEA joint secretary dealing with North America at the time – put it: “As a market economy, India is entitled to an unencumbered CSLA with the US”. This, presumably, was also an allusion to the fact that Indian agencies were not being subsidised by their government in order to undercut international competitors.

A cable tracking the negotiations in 2009 noted that:

“ISRO was keen to be able to launch U.S. commercial satellites, but expected its nascent system to be afforded flexibility with respect to the market principles outlined in the CSLA. ISRO opposed language in the draft CSLA text on distorting competition, transparency, and improper business practices, but agreed to propose some alternate wording after Bliss made clear that the USG would not allow commercial satellites to be licensed in the same way as non-commercial satellites … indicating that commercial satellites licenses would either be allowed through the completion of a CSLA or after a substantial period of time has passed to allow the USG to evaluate ISRO’s pricing practices and determine that they do not create market distortions.”

ISRO officials present at the discussion table on that day asked if the wording meant the US government was alleging that ISRO was unfairly undercutting prices (when it wasn’t), and if the CSLA was being drafted as a separate agreement from the TSA because it would allow the US government to include language that explicitly prevented the Indian government from subsidising PSLV launches. USTR officials countered that such language was used across all CSLAs and that it had nothing to do with how ISRO operated. (Interestingly, 2009 was also the year when SpaceX ditched its Falcon 1 rocket in favour of the bigger Falcon 9, opening up a gap in the market for a cheaper launcher – such as the PSLV.)

Nonetheless, the underlying suspicion persists to this day. In September 2015, the PSLV C-30 mission launchedASTROSAT and six foreign satellites – including four cubesats belonging to an American company named Spire Global. In February 2016, US Ambassador Richard Verma recalled the feat in a speech he delivered at a conference in New Delhi; the next day, the Federal Aviation Administration reiterated its stance that commercial satellites shouldn’t be launched aboard ISRO rockets until India had signed the CSLA. In response to this bipolar behaviour, one US official told Space News, “On the one hand, you have the policy, which no agency wants to take responsibility for but which remains the policy. On the other, government agencies are practically falling over themselves to grant waivers.” Then, in April, private spaceflight companies in the US called for a ban on using the PSLV for launching commercial satellites because they suspected the Indian government was subsidising launches.

A fork in the path

India also did not understand the need for the CSLA in the first place because any security issues would be resolved according to the terms of the TSA (signed in 2009). It wanted to be treated the way Japan or the European Union were: by being allowed to launch American satellites without the need for an agreement to do so. In fact, at the time of signing its agreement with Japan, Japan did not allow any private spaceflight entities to operate, and first considered legislation to that end for the first time in 2015. On both these counts, the USTR had argued that its agreement with India was much less proscriptive than the agreements it had struck with Russia and Ukraine, and that its need for an agreement at all was motivated by the need to specify ‘proper’ pricing practices given India’s space launches sector was ruled by a single parastatal organisation (ISRO) as well as to ensure that knowhow transferred to ISRO wouldn’t find its way to military use.

The first news of any organisation other than ISRO being allowed to launch rockets to space from within India also only emerged earlier this year, with incumbent chairman A.S. Kiran Kumar saying he hoped PSLV operations could be privatised – through an industrial consortium in which its commercial arm, Antrix Corporation, would have a part – by 2020 so the rockets could be used on at least 18 missions every year. The move could ease the way to a CSLA. However, no word has emerged on whether the prices of launches will be set to market rates in the US or if ISRO is considering an absolute firewall between its civilian and military programmes. Recently, a group of universities developed the IRNSS (later NAVIC), India’s own satellite navigation system, alongside ISRO, ostensibly for reducing the Indian armed forces’ dependence on the American GPS system; before that was the GSAT-6 mission in August 2015.

If it somehow becomes the case that ISRO doesn’t ever accede to the CSLA, then USTR doubts over its pricing practices will intensify and any commercial use of the Indian agency’s low-cost launchers by American firms could become stymied by the need for evermore clearances. At the same time, signing up to the CSLA will mean the imposition of some limits on what PSLV launches (with small, commercial American payloads) can be priced at. This may rob ISRO of its ability to use flexible pricing as a way of creating space for what is after all a “nascent” entity in global terms, besides becoming another instance of the US bullying a smaller player into working on its terms. However, either course means that ISRO will have to take a call about whether it still thinks of itself as vulnerable to getting “priced out” of the world market for commercial satellite launches or is now mature enough to play hardball with the US.

Special thanks to Prateep Basu.

The Wire
May 23, 2016

So what’s ISRO testing on May 23?

Apologies about the frequency of updates having fallen off. Work’s been hectic at The Wire – we’re expanding editorially, technologically and aesthetically – but more to the point, Delhi’s heat ensures my body has no surplus energy when I get back from work to blog (it’s a heartless 38 ºC at 10 pm). Even now, what follows is a Facebook Note I posted on The Wire‘s page yesterday (but which didn’t find much traction because of the buildup to today’s big news: the election results from five states).

At about 9.30 am on Monday, May 23, a two-stage rocket will take off from the Sriharikota High Altitude Range and climb to an altitude of 48 km while reaching a speed of ~1,770 m/s. At that point, the first stage – a solid-fuel booster – will break off from the rocket and fall down into the Bay of Bengal. At the same time, the second stage will still be on the ascent, climbing to 70 km and attaining a speed of ~1,871.5 m/s. Once there, it will begin its plummet down and so kick off the real mission.

Its designation is RLV-TD HEX1 – for Reusable Launch Vehicle Technology Demonstration, Hypersonic Experiment 1. The mission’s been in the works for about five years now, with an investment of Rs.95 crore, and is part of the Indian Space Research Organisation’s plans to develop a reusable launch vehicle in another 15 years. The HEX1 mission design suggests the vehicle won’t look anything like SpaceX’s reusable rockets (to be precise, reusable boosters). Instead, it will look more like NASA’s Space Shuttle (retired in 2011): with an airplane-like fuselage flanked by delta wings.

Screenshot from a presentation made by M.V. Dhekane, deputy director of the Control Guidance & Simulation Entity, VSSC, in 2014.
Screenshot from a presentation made by M.V. Dhekane, deputy director of the Control Guidance & Simulation Entity, VSSC, in 2014.

And the one that’ll be flying on Monday will be a version six-times smaller in scale than what may ultimately be built (though still 6.5-m long and weighing 1.7 tonnes). This is because ISRO intends to test two components of the flight for which the RLV’s size can be smaller. The first (in no specific order) will be the ability of its body to withstand high temperatures while falling through Earth’s atmosphere. ISRO will be monitoring the behaviour of heat-resistance silica tiles affixed to the RLV’s underside and its nose cone, made of a special carbon composite, as they experience temperatures of more than 1,600º C.

The second will be the RLV’s onboard computer’s ability to manoeuvre the vehicle to a designated spot in the Bay of Bengal before crashing into the water. That spot, in a future test designated LEX and a date for which hasn’t been announced, will hold a floating runway over 5 km long – and where the RLV will land like an airplane. A third test will check for the RLV’s ability to perform a ‘return flight experiment’ (REX) and the final one will check the scramjet propulsion system, currently under development.

ISRO has said that the RLV, should it someday be deployed, will be able to bring down launch costs from $5,000 per kg to $2,000 per kg – the sort of cuts SpaceX CEO Elon Musk has repeatedly asserted are necessary to hasten the advent of interplanetary human spaceflight. However, the development of advanced technologies isn’t the only driver at the heart of this ambition. Private spaceflight companies in the US recently lobbied for a ban against the launch of American satellites onboard ISRO rockets “because it would be tough for them to compete against ISRO’s low-cost options, which they also alleged were subsidised by the Indian government”.

Then again, an ISRO official has since clarified that the organisation isn’t competing against SpaceX either. Speaking to Sputnik News, K. Sivan, director of the Vikram Sarabhai Space Centre in Thiruvananthapuram, said on May 17, “We are not involved in any race with anybody. We have our own problems to tackle. ISRO has its own domestic requirements which we need to satisfy.”

So, good luck for HEX1, ISRO!

Featured image: The PSLV C33 mission takes off to launch the IRNSS 1G satellite. Credit: ISRO.

Note: This post earlier stated that the HEX1 chassis would experience temperatures of 5,000º C during atmospheric reentry. It’s actually 1,600º C and the mistake has been corrected.

The GSLV Mk-III is no jugaad

Scroll
December 18, 2014

(Note: This piece was written in the future-tense and published before ISRO’s successful test flight this morning.)

Come Thursday, the Indian Space Research Organisation will launch its GSLV Mk-III rocket from its launch pad in Sriharikota. In the run-up, most media attention has been on a conical module the rocket will carry on board. But of greater interest is the rocket itself, which holds the key to making ISRO a serious contender in the international satellite-launch sector.

The module is part of the Crew-Module Atmospheric Reentry Experiment, which will see it being released at an altitude of 126 kilometres, upon which it will re-enter earth’s atmosphere and crash into the Bay of Bengal, some 200 kilometres west of the Andaman Islands.

Scientists at ISRO will monitor CARE during its journey and gather important data about its surface and interiors. If the module’s performance matches their predictions, India will be that much closer to using it as a crew capsule for a manned mission into space planned in the early 2020s.

Cashing in on the growth

Forgotten in the media buzz around the module is the rocket itself.

The Mk-III, a next-generation variant of ISRO’s fleet of geosynchronous satellite launch vehicles, boasts of India’s highest payload capacity yet: 10,000 kilograms to low-earth orbit and 4,000 kilograms to the highly elliptical geostationary-transfer orbit.

If the launch is successful – and if future test flights establish reliability – ISRO’s commercial space programme will be in a position to cash in on the rapidly growing global satellite-launching industry as well as give domestic engineers the leeway to design more sophisticated satellites.

This was an important consideration during the Mars Orbiter Mission. The orbiter itself, currently revolving around the Red Planet, weighs only 15 kilograms because the Polar Satellite Launch Vehicle’s payload limit to earth orbit is 1,350 kilograms. This includes all the other instruments on board to ensure a smooth journey. A heavier orbiter could have included more than the five instruments it did.

Dependence on others

In this regard, the GSLV Mk-III will be important because it will determine where India’s native space research programme is headed and how it plans to leverage the increased payload mass option.

It will also reduce India’s dependence on foreign launch vehicles to get heavier satellites into orbit, although self-reliance comes with problems of its own. The common choice in lieu of a reliable GSLV has been the French Arianespace programme, which currently serves almost 65% of the Asia-Pacific market. The Mk-III bears many structural similarities to the Ariane 6 variant. Also, both rockets have a liquid main-stage, a cryogenic upper-stage and two solid-fuel boosters.

The Ariane 6 can lift 6,500 kilograms to the geostationary-transfer orbit, and each launch costs India about $95 million. Assuming the cost-per-launch of the Mk-III is comparable to the Mk-II’s, the number approximately comes down to $40 million (this is likely to be slightly higher). Compare this to the global average price-per-launch of vehicles capable of reaching the geostationary-transfer orbit: $145.57 million, as of 2013.

Skyrocketing profits

From 1999 to 2014, ISRO launched 40 foreign satellites, all with PSLV rockets, and earned EUR 50.47 million and $17.17 million (or Rs 505.74 crore) from 19 countries. Antrix, the commercial arm of ISRO in charge of handling the contracts with foreign space agencies, has reported profits ranging from Rs 19 crore to Rs 169 crore between 2002 and 2009.

This is a pittance compared to what Arianespace made in 2013 alone: EUR 680.1 million. A reliable launch vehicle to the geostationary-transfer orbit can change this for the better and position ISRO as a serious contender in the space-launch sector, assuming it is accompanied by a more efficient Antrix and an ISRO that is willing to work with foreign counterparts, both private and governmental.

It must also consider expanding its launch capabilities to the geostationary-transfer orbit and prepare to keep up with the 5-15% growth rate recorded in the last five years in the satellites industry. Now is an opportune time, too, to get on the wagon: the agency’s flags are flying high on the success of the Mars Orbiter Mission.

Facing other challenges

ISRO has to be ready to confront the likes of SpaceX, a space transport services company which already has the Falcon 9 rocket that can launch 13,150 kilograms to low-earth orbit and 4,850 kilograms to the geostationary-transfer orbit at starting costs of $57 million per launch.

On another front, ISRO will have to move the public dialogue away from its fixation on big science missions and toward less grandiose but equally significant ones. These will help establish the space agency’s mettle in reliably executing higher-altitude launches, enhancing India’s capabilities in the space-launch and space-research sectors. These will also, in turn, serve to make high-cost missions more meaningful than simple proofs of concepts.

For example, ISRO Chairman K Radhakrishnan has announced that a project report compiled by the agency envisages a Rs 12,400-crore manned space mission by 2021. In the next seven years, thus, ISRO aims to master concepts of re-entry technology, human spaceflight and radiation protection. This will happen not just through repeated test flights and launches of crew modules but also using satellites, space-borne observatories and data analysis.

For all these reasons, the GSLV Mk-III marks an important step by ISRO, one that will expose it to greater competition from European and American launchers, increase its self-reliance in a way that it will have to justify its increasing launch capabilities with well-integrated projects, and help the agency establish a legacy over and beyond the jugaad that took it to Mars.

The Mars Orbiter Mission was launched around the same time as NASA’s MAVEN mission to Mars, and with comparable instrumental specifications. While MOM cost ISRO $74 million, MAVEN cost NASA $672 million. In fact, ISRO’s orbiter was by far the least expensive Mars satellite ever built.

A “Dear ISRO” moment

I published a quick analysis in The Hindu, republished with permission from Scienceline, about the ISRO Mars Orbiter. Gist (excerpted):

Even if [ISRO] has launched a spacecraft to Mars, the payload limit and the lack of an inclusive scientific agenda still stand in the way of taking full advantage of scientific interest and infrastructure on the ground.

These are some of the replies I received on Twitter in response to the piece.

You probably didn’t read my piece, and you probably don’t know what “one-hit wonder” means either.

Who are “Thomeses”?

I don’t understand why you think I’ve not been courteous. My arguments weren’t barbaric. And I think it’d be wonderful if people considered constructive criticism the utmost courtesy. I know I do.

A friend of mine recently told me he couldn’t criticize my piece for me because he said that’s not what friends do. But that’s what I think friends do do because appreciation that is completely honest is something very hard to come by.

This is a common blight plaguing the perception of scientific research in India. It’s easy to just say “nanosatellites” and then think about it inside your head. However, what’re they for? Who comes up with such ideas? Who builds them? And at the end of the day where would ISRO go with it? Answer them reasonably and then I’ll concede nanosatellites make sense.

Another aspect of this comment is that you’re thinking in terms of gee-whiz stuff, you’re thinking of demonstrating more technology, but ISRO is too important to indulge in things like that over and over again. It’s a national space agency so let’s be respectful of that.

Someone’s made an allegation and you’re batting it away. Do you know something that nobody else does?

Thanks.

Scienceline

I also received the following comments on the same piece as published on Scienceline (you should check the site out, it’s my NYU program’s science portal and has some other amazing pieces as well).

Thanks you for writing such a wonderful article to put the facts straight.Hope we don’t get overconfident as we have put only small payload of 15 kg whereas others have put 64 kg of payload. Hope a new mission to use GSLV-D5 to put more payload gets approved quickly and gets successful.Anyway achieving success on first maiden flight is no small feat and kudos to Indian Space scientists!!! – Ravikanth V

I’m glad you understand my sentiment.

Mr.Vasudevan, I don’t think you are a father. Only if you have become a father you can appreciate the baby’s steps in the beginning and that which ends even as an Olympic champion. But one has to go thru what is called growth. Hope you understood what I meant. – Bindo

Yeah, I get you, but I don’t want ISRO – nor the nation – to think of its interplanetary exploration program as it would of a child.

Dear writer, You crave attention so bad that, on the day of a historical achievement, you have published such a negative aticle. Shame on you. Have you designed any electronics before? And do you know how challenging is it to achieve that with limited budget? Please do not write such articles for ISRO. People of India take pride in this organization. You should have waited for atleast a day. – Kc

Because all my opinions are suddenly okay after 24 hours? And I think it is my duty as someone who does take pride in ISRO that I feel such things need to be said before we ramp up our expectations to heights the agency may never even have plans for.

Now it’s time for us to show our gratitude to the nation. Indians who are draining their brain to foreign countries, come back to our country as soon as possible. Finish ur commitments soon, ur nation has just made a history and waiting for you. – Dilip

I resent that you’re implying that all those who left the country in search of greener fields are/were opportunists. I also resent that you think the proverbial system is working well enough to be able to reject the oodles of talent still present in the country.

Very well articulated article, thank you. The mission is symbolic and demonstrates our ISRO’s scientific capability. I’m hopeful our new govt. will only be supportive of country’s scientific community, encourage with all means available and pragmatic enough to have or build a plan so, in a decade least, we indeed achieve what we want to be – equally a ‘space superpower’. Albeit this is still a proud moment for we the people of India. Congratulations to the ISRO’s scientific community who made this possible. – Guru Dwarakanath

Again, I’m glad you understand what I’m trying to say.

And the GSLV flew!

The Copernican
January 6, 2014

Congratulations, ISRO, for successfully launching the GSLV-D5 (and the GSAT-14 satellite with it) on January 5. Even as I write this, ISRO has put out an update on its website: “First orbit raising operation of GSAT-14 is successfully completed by firing the Apogee Motor for 3,134 seconds on Jan 06, 2014.”

With this launch comes the third success in eight launches of the GSLV program since 2001, and the first success with the indigenously developed cryogenic rocket-engine. As The Hindu reported, use of this technology widens India’s launch capability to include 2-2.5 tonne satellites. This propels India into becoming a cost-effective port for launching heavier satellites, not just lighter ones as before.

The GSLV-D5 (which stands for ‘developmental flight 5′) is a variant of the GSLV Mark II rocket, the successor to the GSLV Mark I. Both these rockets have three stages: solid, liquid and cryogenic. The solid stage possesses the design heritage of the American Nike-Apache engine; the liquid stage, of the French Vulcain engine. The third cryogenic upper stage was developed at the Liquid Propulsion Systems Centre, Tamil Nadu—ISRO’s counterpart of NASA’s JPL.

There is a significant difference of capability based on which engines are used. ISRO’s other more successful launch vehicle, the Polar Satellite Launch Vehicle (PSLV), uses four stages: alternating solid and liquid ones. Its payload capacity to the geostationary transfer orbit (GTO), from which the Mars Orbiter Mission was launched, is 1,410 kg. With the cryogenic engine, the GSLV’s capacity to the same orbit is 2,500 kg. By being able to lift more equipment, the GSLV hypothetically foretells our ability to launch more sophisticated instruments in the future.

The better engine

The cryogenic engine’s complexity resides in its ability to enhance the fuel’s flow through the engine.

An engine’s thrust—its propulsive force—is higher if the fuel flows faster through it. Solid fuels don’t flow, but they let off more energy when burnt than liquid fuels. Gaseous fuels barely flow and have to be stored in heavy, pressurised containers.

Liquid fuels flow, have higher energy density than gases, and they can be stored in light tanks that don’t weigh the rocket down as much. The volume they occupy can be further reduced by pressurising them. Recall that the previous launch attempt of the GSLV-D5, in August 2013, was called off 74 minutes before take-off because fuel had leaked from the liquid stage during the pre-pressurisation phase.

Even so, there seems no reason to use gaseous fuels. However, when hydrogen burns in the presence of oxygen, both gases at normal pressure and temperature, the energy released provides an effective exhaust velocity of 4.4 km/s—one of the highest (p. 23, ‘Cosmic Perspectives in Space Physics’, S. Biswas, 2000). It was to use them more effectively that cryogenic engines were developed.

In a cryogenic engine, the gases are cooled to very low temperatures, at which point they become liquids—acquiring the benefits of liquid fuels also. However, not all gases are considered for use. Consider this excerpt from a NASA report written in the 1960s:

A gas is considered to be cryogen if it can be changed to a liquid by the removal of heat and by subsequent temperature reduction to a very low value. The temperature range that is of interest in cryogenics is not defined precisely; however, most researchers consider a gas to be cryogenic if it can be liquefied at or below -240 degrees fahrenheit [-151.11 degrees celsius]. The most common cryogenic fluids are air, argon, helium, hydrogen, methane, neon, nitrogen and oxygen.

The difficulties arose from accommodating tanks of super-cold liquid propellants—which includes both the fuel and the oxidiser—inside a rocket engine. The liquefaction temperature for hydrogen is 20 kelvin, just above absolute zero; for oxygen, 89 kelvin.

Chain of problems

For starters, cryopumps are used to trap the gases and cool them. Then, special pumps called turbopumps are required to move the propellants into the combustion chamber at higher flow-rates and pressures. Next, relatively expensive igniters are required to set off combustion, which also has to be controlled with computers to prevent them from burning off too soon. And so forth.

Because using cryogenic technology drove advancements in one area of a propulsion system, other areas also required commensurate upgrades. Space engineers learnt many lessons from the American Saturn launch vehicles, whose advanced engines (for the time) were born of using cryogenic technology. They flew between 1961 and 1975.

In the book ‘Rocket Propulsion Elements’ (2010) by George Sutton and Oscar Biblarz, some other disadvantages of using cryogenic propellants are described (p. 697):

Cryogenic propellants cannot be used for long periods except when tanks are well insulated and escaping vapours are recondensed. Propellant loading occurs at the launch stand or test facility and requires cryogenic propellant storage facilities.

With cryogenic liquid propellants there is a start delay caused by the time needed to cool the system flow passage hardware to cryogenic temperatures. Cryogenically cooled fluids also continuously vaporise. Moreover, any moisture in the same tank could condense as ice, adulterating the fluid.

It was in simultaneously overcoming all these issues, with no help from other space-faring agencies, that ISRO took time. Now that the Mark II has been successfully launched, the organisation can set its eyes on loftier goals—such as successfully launching the next, mostly different variant of the GSLV: the Mark III, which is projected to have a payload capacity of 4,500-5,000 kg to GTO.

While we are some way off from considering the GSLV for manned missions, which requires mastery of reentry technology and spaceflight survival, the GSLV Mark III, if successful, could make India an invaluable hub for launching heavier satellites at costs lesser than ESA’s Ariane program, which India used in lieu of the GSLV.

Good luck, ISRO!