India's Moon Exploration Program

[pankaj nema]

 

[TopWatcher]

Truly heartwarming


this is the intent, this is everything that is achieved,
They are the future and the seeds have been sowed, they are budding engineers and scientists
all those non entities seething at our space program can cope in perpetuity, this is something that their kids will never get the pleasure of enjoying

Great to see. They are our future.

 

[Indx TechStyle]

Chandrayaan-3 Mission update:
The spacecraft's health is normal.

The first orbit-raising maneuver (Earthbound firing-1) is successfully performed at ISTRAC/ISRO, Bengaluru.

Spacecraft is now in 41762 km x 173 km orbit.

 

[skywatcher]

Scott Manley: India's Flagship Lunar Mission Chandrayaan 3: Will it Brake or Break?

 

[skywatcher]

Scott Manley: India's Flagship Lunar Mission Chandrayaan 3: Will it Brake or Break?

looks ISRO chief is under huge pressure.

The world is watching.

 

[AnantS]

 

[AnantS]

Chandrayaan-3's orbit raised, Indian spacecraft cruising smoothly in space

The Chandrayaan-3 mission was launched from the Satish Dhawan Space Centre on board India's heaviest launch vehicle, the Launch Vehicle Mark-3 on Friday.

www.indiatoday.in

 

[Indrajit]

 

[SKC]

Similar to the Launches from various launch pads in Florida - all next to ocean.

 

[TopWatcher]

 

[TopWatcher]

As LMV3 able to send 10T to LEO. If CY4 can be of 9T mass , will LMV3 able to send this to LEO and from LEO using raising orbit process , will spacecraft travel to moon ?

 

[knathan]

As LMV3 able to send 10T to LEO. If CY4 can be of 9T mass , will LMV3 able to send this to LEO and from LEO using raising orbit process , will spacecraft travel to moon ?

I hope apogee matters here.
If both perigee and apogee in LEO then need more purn time to increase apogee's... cost more fuel and less payload
CY3 final orbit after separation 170*36500 km

 

[Cheran]

 

[Cheran]

 

[TopWatcher]

View attachment 215077

No info about orbit range ??

 

[TopWatcher]

No info about orbit range ??

Chandrayaan-3 Mission: The spacecraft has attained a 51400 km x 228 km orbit, as planned.

 

[Indx TechStyle]

As LMV3 able to send 10T to LEO. If CY4 can be of 9T mass , will LMV3 able to send this to LEO and from LEO using raising orbit process , will spacecraft travel to moon ?

If you want to go to TLI from LEO, good look using more fuel weight than 70-80% of entire current launch mass. Needless to say that it would 5-6 months also instead of one.

 

[Vamsi]

The reasons to not use a high ΔV burn are:

• This is is an unmanned mission. We don't need to send the lander in a few days, when the same can be done with lesser ΔV (using Oberth effect) but requiring more time.
• Second reason is that we don't have an engine with required thrust to apply the required ΔV in one go. We need to reduce mass of the lander to do that (and nobody wants that). That's why the periapsis burn is broken into several smaller burns.

In fact, this is the not the most efficient method. ISRO could've used a weak stability boundary transfer which requires lesser ΔV than Hohmann transfer. However, it will take months to reach moon in this method.

It's not about the powerful upperstage .... LVM-3 upperstage uses highest thrust upperstage engine in the world today....it's about total payload capacity of the rocket.....if the LVM-3 had 5tons payload capacity to GTO, then it would have directly injected CY-3 into Lunar Transfer Trajectory....for eg Chinese launched 3.85 ton weighing Chang'e-3 & 4 (same weight as CY-3) using LongMarch-3B rockets which had 5ton to GTO capability....Semi-cryo variant of LVM-3 i.e LVM-3SC could directly CY-3 into a LTT

 

[Vamsi]

looks ISRO chief is under huge pressure.View attachment 214774The world is watching.
View attachment 214773

For every launch they visit the goddess changalamma, she is the guardian diety of Sriharikota, iirc

 

[Vamsi]

As LMV3 able to send 10T to LEO. If CY4 can be of 9T mass , will LMV3 able to send this to LEO and from LEO using raising orbit process , will spacecraft travel to moon ?

CY-4 aka LUPEX will be launched using Japanese H-3