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Questions tagged [isro]

Questions about Indian Space Research Organization (ISRO), its missions, research projects, and other activities financed, organized, planned, managed, or otherwise arranged under this organization's umbrella.

2
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0answers
144 views

Does this rocket engine test run look healthy?

The new Ariane 6's upper stage engine "Vinci" is expected to challenge the RL-10C, which is currently the most efficient chemical rocket engine on the market. The European aerospace conglomerate aims ...
1
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0answers
67 views

Why does the PSLV first stage's exhaust plume turn to bluish at high altitude?

After few seconds, post liftoff(anywhere between 60s and 90s), the exhaust plume of PSLV turns into a bluish colour. This is quite evident in night launches than day launches(obviously because the ...
5
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1answer
188 views

Why does PSLV use four stages to get to LEO, and why do they alternate solid, liquid, solid, liquid?

Is there a simple way to explain why ISRO's PSLV launch vehicle uses four stages to get to LEO, and why they alternate as follows: ...
2
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1answer
52 views

help understanding this complicated structure that will deploy HySIS

This ISRO page for the HysYS spacecraft says: HysIS, the primary satellite of PSLV-C43 mission, weighing about 380 kg, is an earth observation satellite configured around ISRO’s Mini Satellite-2 (...
5
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0answers
74 views

Acceleration Profile of PSLV and GSLV

What is the way to find out the acceleration profiles of IRSO's GSLV and PSLV from launch until achieving orbit?
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0answers
92 views

Why would ISRO's MOM-2 Mars orbiter mission's apoarion already be decided in such an early call for proposals?

ISRO's announcement Announcement of Opportunity (AO) for future Mars Orbiter Mission (MOM-2) says in part: It is now planned to have the next orbiter mission around Mars for a future launch ...
5
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2answers
274 views

Why does only Space X release every stage of rocket launch for the public viewing?

What I mean is Space X telecast every stage of rocket launch. But in NASA and ISRO, they just telecast rocket ignition launch. ISRO and NASA never does this thing why so?
3
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2answers
195 views

Why is ISRO Launch Escape System so SLOW?

I've just watched a video of the recent test and one thing I noticed is that comparing to other LES, like Mercury, Dragon, Soyuz, it looks really sluggy - like it has like 1.3-1.5 TWR. For pad abort, ...
36
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1answer
3k views

What kind of orbit makes this wave shaped ground track?

Here is a screen shot from NY2O of the ground track from GSAT-6A (43241, 2018-027A). What kind of orbit can make this wave shaped ground track?
4
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2answers
207 views

Which ISRO satellite was built in 24 hours?

In the video New ISRO Chief Rocket Man Sivan K, A Farmer's Son, Takes On SpaceX after about 08:33 the interviewer asks ISRO's chairperson Kailasavadivoo Sivan about ...
1
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1answer
297 views

Why is ISRO's PSLV named “Polar”? Are there challenges for other inclinations?

The "P" in ISRO's PSLV stands for "Polar". Is there anything particularly "polar" about this launch vehicle, or is the use of the word in the name of the rocket more historical or for marketing ...
5
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1answer
412 views

What are the falling parts in this ISRO rocket launch?

ISRO launched IRNSS-1I satellite yesterday using its versatile PSLV-XL. In the launch video (from 00:35 to 00:40), within five seconds of the launch, many large parts of the rocket are seen to be ...
5
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1answer
50 views

What are the regulatory steps to be taken by a private aerospace company in India to launch a satellite?

The idea is to launch a satellite with ISRO or any other foreign launch service provider like SpaceX. The satellite in question is a simple CubeSat for basic remote sensing.
2
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1answer
45 views

Users of GSAT-6A or similar communication satellites

Who are the actual users of the recently launched GSAT-6A(or similar communication satellites). Are these satellites only for millitary communication(using satellite phones)? I have a suspicion that ...
12
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3answers
565 views

Might ISRO's 2018-004 launch be at least a technical violation of the Outer Space Treaty by India?

The IEEE News article FCC Accuses Stealthy Startup of Launching Rogue Satellites as well as the question What checks are supposed to be carried out to prevent illegal satellite launches? address the ...
5
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1answer
1k views

Launching sounding rockets from the magnetic equator (ISRO's Thumba)

The Thumba Equatorial Rocket Launching Station is operated by ISRO for launching sounding rockets because magnetic equator passes through it. Equator gives additional velocity, But what advantage ...
6
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1answer
146 views

How was it difficult for the PSLV to launch a record of 104 satellites?

Last year, ISRO launched 104 satellites successfully into orbit. People praised it as an 'astounding achievement'. Besides a more complicated-than-usual satellite separation, what truly was ...
0
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1answer
169 views

Is there any central world organization which authenticate achievement of various space agencies missions?

Recently Isro's mars orbitor has completed 4 years in mars orbit I guess. I am proud of that as I am Indian. but as curious person I still wonder for proofs of that mars orbitor is still in mars ...
5
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0answers
189 views

Is ISRO Making a Methane Engine?

I'd read some stray comment on the internet claiming that ISRO is working on a methane-LOX engine, just as a technology demonstrator. Is this true?
2
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0answers
135 views

How have the 'gift' transponders on ISRO's GSAT-9 been used by other countries?

edit: It's been seven months close to two years now, have any of the 'gift' transponders been used or at least tested yet by the gift recipient nation? The BBC news item India launches 'invaluable' ...
6
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1answer
296 views

What is the magnetic equatorial anomaly and how is GAGAN unique in its ability to compensate?

ISRO's GPS Aided GEO Augmented Navigation system (GAGAN) (see ISRO and Wikipedia) is the first GPS augmentation system designed to deal with ionospheric effects near the geomagnetic equator. From ...
3
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1answer
198 views

Which of these configurations is preferred and why?

I came across an article with the following infographic: infographic source The GSLV rockets use solid/liquid engines as core stage and cryogenic engine as upper stage while the Ariane V rocket has ...
3
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1answer
236 views

How have/how will Indian ground stations be used for comms or tracking of deep space spacecraft?

I have a few data points, but not the big picture. 19-10-2016, the Giant Metre Wave Telescope was used to monitor the doppler shift of a beacon signal from the Schiaparelli spacecraft as it descended ...
11
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2answers
446 views

ISRO's space plane on top of of a rocket - how unstable was it?

ISRO's space plane was launched on top of a rocket into a sub-orbital trajectory, with separation from the lift vehicle around 45 km and a maximum altitude of about 65 km, based on an analysis of the ...
5
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1answer
574 views

What is happening to the rocket in this ISRO photo - what are these huge platforms?

The News Nation (India) article ISRO PSLV-C37 launch: Why it is crucial for India? Everything you should know about the 104 satellites mission includes this photo, with the caption "ISRO's biggest ...
6
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1answer
276 views

ISRO's PSLV-C37 with 104 satellites - after 56 hours only six TLEs, which factor is greatest challenge?

It's been 24 hours 56 hours since ISRO's PSLV-C37 launched from Satish Dhawan Space Centre (SRI) at 09:28 local time (03:58 UTC). I see satcat numbers and object names for 105 total objects; ...
29
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3answers
4k views

Why is China still not invited to the ISS? (Or, why do certain countries not get invited/rejected to work on the ISS?)

I understand that U.S. Congress passed a law in 2011 barring space agency collaboration with CNSA because of concerns over "national security". I also get that China blew-up one of their own ...
4
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1answer
157 views

What does CLG INIT mean?

During India's PSLV-C35 launch on 26 September 2016, mission control's launch sequence events (stage separations, stage ignitions, etc.) included 'CLG INIT'. What does it mean?
22
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3answers
4k views

Why do some rockets not ignite all their engines during liftoff? (GSLV MK3 LV)

As I understand it, a rocket should produce its maximum thrust on liftoff. As time progresses, the mass of the rocket will decrease, but since the engines produce the same thrust, the rocket will ...
9
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3answers
1k views

GSLV MK2 vs Falcon 9 - Reasons for Huge performance difference

Yesterday ISRO operated the GSLV MK2 launch vehicle, which is a medium lift launch vehicle with a capability to lift 5 tonnes to LEO. I just compared Falcon 9 with GSLV MK2. Falcon 9 capability to ...
2
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1answer
144 views

How can ISRO's RISAT satellites search for the lost IAF AN-32?

The Indian Air Force has lost contact with AN-32 (transport aircraft) on a mission. ISRO is going to deploy RISAT to search for the missing plane as the search area has widened. How will such ...
4
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1answer
172 views

Does ISRO's RLV have a future manned spacecraft in mind?

The Indian Space Research Organization (ISRO) is currently testing a Reusable Launch Vehicle (RLV) in a technology demonstration program. Does this program have a future manned vehicle in mind? Or is ...
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0answers
62 views

What is the current status of India's RLV craft? [closed]

What is their underlying technology, and is it going to be cheaper like their Mars orbital mission?
8
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1answer
672 views

What have been India's Mars mission's benefits to science?

From Wikipedia, it seems the objective is to gain experience in Mars missions and taking some scientific observations. My question is, did ISRO scientists discover anything new from their observations?...
1
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1answer
80 views

Utilization of data from satellites mantained by India

What are the prerequisites to utilize the data from 'astrosat' or 'mangalyaan'. My aim is to check how useful the data generated by an Indian scopes are? I could not make any sense in the catalogs.
6
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1answer
157 views

How are these 3D terrain models of Mars generated?

Recently ISRO released 3D terrain models of Mars' Ophir Chasma terrain as shown here. LiDAR is one instrument which helps in generating such 3D models. ISRO's MARS orbiter sensor payload does not have ...
1
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1answer
240 views

Indian Manned Flight to 'Near Space' by ISRO?

I recently read about Google exec Alan Eustace's record skydiving jump from a 'near space' altitude of 135,890 feet and was surprised to learn that the balloon which lofted him up to that height was ...
7
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2answers
519 views

Methane detection on Mars by MOM?

It's been almost a month since the ISRO's Mars Orbiter Mission (MOM) was put into orbit. Though it doesn't carry much scientific payload, the one most talked about is the methane sensor, which even ...
10
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3answers
640 views

Why is MOM in a very retrograde orbit?

A recent question/discussion on this site brought out the interesting fact that most probes around Mars are in Sun synchronous near polar orbit. The ISRO web-site for the Mars Orbiter Mission writes ...
3
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0answers
247 views

What will MOM do when Earth isn't looking?

A quick follow-up to Is each instrument on ISRO MOM independently in 24x7 contact with Earth? Every 26 months Sol interposes to occult Earth from the gaze of the Warlord. The last time this occurred ...
2
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0answers
167 views

Is each instrument on ISRO MOM independently in 24x7 contact with Earth?

The ISRO Mars Orbiter Mission web-site writes to say Mars Orbiter Mission carries five scientific payloads to observe Martian surface, atmosphere and exosphere extending up to 80,000 km for a ...
16
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3answers
3k views

Cheap cost of Mangalyaan

It has been reported that India's Mars mission, Mangalyaan, cost only \$74 million compared to \$671 million cost of Maven. What is the reason for this difference in cost? Are there any significant ...
9
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3answers
618 views

Is there any active collision avoidance aboard the spacecraft in Mars' orbit?

Wikipedia writes to say As of 2009, about 19,000 pieces of debris larger than 5 cm (2.0 in) are tracked,[1] with another 300,000 pieces smaller than 1 cm below 200 km altitude Control collision ...
3
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1answer
322 views

ISRO's Mars Orbiter Mission - LAM vs Attitude thrusters reliability

ISRO expressed concerns on restarting the Liquid Apogee Motor (LAM) for Mars Orbit Insertion (MOI) after a long coasting period of its Mars Orbiter Mission (MOM). ISRO has redesigned the LAM plumbing ...
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2answers
292 views

Is it possible to know the position of MOM?

How far has the MOM (Mars Orbiter Mission) travelled, and Where is it now? It is scheduled to reach Mars orbit on September 1 this year.
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6answers
6k views

Why is there a “coasting” phase in some space launches?

During the PSLV (India's Polar Satellite Launch Vehicle) C24 launch on 4 April 2014, once stage 3 (PS3) had burned out, it wasn't immediately jettisoned, but instead there was a coasting phase for ...
6
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1answer
773 views

What specifications is the ISRO crew module fabricated to?

http://www.thehindubusinessline.com/news/science/human-space-flight-prog-hal-hands-over-crew-module-assembly-to-isro/article5685195.ece writes to say Hindustan Aeronautics Ltd (HAL) has handed ...
10
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1answer
655 views

Cause of ISRO MOM's LAM shutdown during the 4th orbit raising manoeuvre

The 4th orbit raising manoeuvre of ISRO's Mars probe (MOM or Mars Orbiter Mission, informally called Mangalyaan) did not go as planned, as the LAM (Liquid Apogee Motor) shut down prematurely. ...
12
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3answers
575 views

Does ISRO's Cryogenic Upper Stage have restart capability?

Does the CUS of ISRO have restart capability? If so why was it not tested in the recent GSLV-D5 flight? Maybe by restarting the stage after S/C release? What enhancements are required to make a ...
8
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3answers
8k views

Could India Send a Lander to Mars?

India has recently sent a small spacecraft to Mars, as a technology demonstration mission. It has also subsequently successfully demonstrated its much-delayed cryogenic upper stage engine with the ...