Bharat Rakshak

SSSalvi

Rover has started to roam around: https://twitter.com/sdhrthmp/status/1694549093455139294?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1694549093455139294%7Ctwgr%5E5c84ee65e89d34c9b87346b08348c189482990dd%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fforum.nasaspaceflight.com%2Findex.php%3Ftopic%3...

SSSalvi

Q. Will a satellite in a large elliptical orbit around the earth be within line of sight of the far side of the moon (even a partial amount of the far side) or is the Langrange point the only spot that can provide line of sight to both the earth and moon? Thanks. Appreciate your knowledge sharing a...

SSSalvi

https://twitter.com/isro/status/1694545322251571687

Lander on surface

SSSalvi

How does the rover control it's speed on the ramp as its quite steep. The gravity on the moon is less, so that helps. Are there any other mechanisms that will slow it down while it gets down the ramp? Dry lubricated Mechanical disk breaks are the simplest way to control the speed of the rover. I do...

SSSalvi

Cyrano wrote: ↑24 Aug 2023 00:28
BTW, who makes our camera optics ? ISRO? DRDO? Pvt Co?
thanks.

Fully ISRO product

SSSalvi

Yes, That was confusing.

SSSalvi

^^^
AI use karo .. Land wherever you want, in picture.

SSSalvi

Happy for the Safe Landing.
Late because was on a panel discussion about landing.
Great achievement for India.
Want to see the Rover sliding dow the ramp, saying ... Mai aya hoon!!!

SSSalvi

Dilbu wrote: ↑22 Aug 2023 18:39 I hope they wont postpone and go for plan B. The tension is unbearable.

If what you mean by Plan B is the last option of alternate location while touching down, then no tension.. only a few minutes of hold your breath.

SSSalvi

Reg Prakash Raj cartoon:
Currently we Indians have lost enjoyment and think only "Anti Nationalist "...
Very sad change in our attitude,
We even celebrate Luna25 problem.

SSSalvi

https://ria.ru/20230820/luna-1891116639.html Translation Scientist says problems with Luna-25 began before attempt to go into orbit "Disturbing signs" at the station "Luna-25" were noticed even before the attempt to transfer to the preorbit, but the decision to postpone the mane...

SSSalvi

Is it just me that I find CY3 photos a bit meh ? I would have hoped better quality this time around since CY1 and MoM … also a decent video would have been nice… I know ISRO’s priorities and all but kids would do a better job with visuals these days ! More funding is needed to make this a proper sp...

SSSalvi

^^^ Only for non engineers -- Order of control system I want to go to some destination. If my vehicle can move with a fixed speed.. and I only have clutch to move or stop. if I press clutch after Reaching destination then I will go ahead or stop before the destination. That is type 1 system.. called...

SSSalvi

https://sankara.net/chandrayaan3.html will it be possible for this kind of animations to include all the 3 craft of interest: 1. lm 2.pm 3.cy2 ( relay station ) of particular interest is the relative positions of lm and cy2 during the landing phase. For CH2, orbiter,lander and ch2 were 3 separate b...

SSSalvi

No, this is only half dilbu.
Real dilbu is only in last sentence.

SSSalvi

^^^ 17th? Have they planned for a change of touchdpoint?.. From the slides shown by S Somnath at the IISC lecture, the lander and propulsion module separation was planned for the 17th, then the lander will go through two de-orbit steps on 18th & 20th with the final touchdown on 23rd. Thanks for...

SSSalvi

^^^ 17th? Have they planned for a change of touchdpoint?.. Too bad if it happens, just to be ahead of a mad dog? World has respected Indian philosophy of slow but systematic planning. Hope it is not poli compulsion. BTW, in earlier translation of rus publicity material, it is said, that automated se...

SSSalvi

Space Research Institute showed first pictures taken by the Luna25 cameras during the flight to the Moon on August 13 - The article . A quick translation of essential part of this: They flew away from the Earth. We fly to the moon August 14, 2023 Project news The Space Research Institute of the Rus...

SSSalvi

^^^
US payload aboard CH3 is LRR

SSSalvi

Anyone know if the Doppler signal received from CY3 is generated by CY3 or is it generated from earth-bound radars and bounced off CY3? CY3 transmits its fixed frequency Telemetry channel. The doppler is generated due to varying distances between Earth ( Receive antenna ) and CH3 Transmitter. Under...

SSSalvi

For those who want to read about LUNA25 launch :

https://russianspaceweb.com/luna-glob-flight.html

SSSalvi

Here is support video for last post.

It shows how the 4 locations get sunlight one after another with timegap of one day between each.

The arrow from South Pole is the Sun direction.

SSSalvi

LUNA26 has 1 Targeted location and 2 standby locations. It is interesting to see the spread of these locations on Moon surface. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhBcilqdqiGNP2JR0CiHrTGfOaBWMrMiAzCtaT6WC8mgFWTTGcJD54w08na8N4PlTkF9QE1codewpmbMuxEILvzoxPizfby3rXyJNKroBTHRLQiDMA...

SSSalvi

........ since their "TEST_PLACE" is in full sunlight all the time! ...... lets calculate the orbits and get an orientation with maximum sunlight. Like CH3 landing site , "TEST_PLACE" , is also illuminated for 1 Lunar day of 14 Earth days. ( Only when Moon is above ( Northern ha...

SSSalvi

we will carry more discussions in space thread.

Thanks for moving to appropriate thread. This will be in continuation of other similar discussions already going on there.

SSSalvi

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg2z2YEkiOml5We7JE0BR30_9cjp-h9xXt2zjeGy5A5XufHSb2QxT0HrJ77iEPJYy9r9jgRg9NA5chYt-ORCbNd5bEKNzbGfzJYcnDWO3OfLFYZ077LTq1LJy0wb7aY9AHOY8qI_wIYgWvnswvbdFu7zluNtxFiiFUBZNDXyQRtAu4_dRjo9TsP1rZUsiYe/s1744/Luna251.jpg Location of Russian craft LUNA2...

SSSalvi

Some Info about Luna 25 Goal and Landing site: https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGnpz0WbmVfS2KW1OFKut32S90Yy_5HO_2le8dVGqNKOPElE_MjJMmaDT1EXDj7x62vtllOsan925v295hqIwLZPc6WfVzwYzhWbZnZ__26uxv1ThwTWm5wiFHgO2OjdKTwTCiDmsRqbstDLv0yfxRy9hHz0pFKy7420v7cQ3ob1erf5NKHT3FU-sGab1V/s11...

SSSalvi

deleted

SSSalvi

^^^ Luna 25 descent starts from 18 kms altitude against 30 Kms of CH3 and Congrats from CH3 https://twitter.com/isro/status/1689845612865523713?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1689845612865523713%7Ctwgr%5E4964a9e3c48f34d4d7e7cdfe68bce6b8ae9a5f99%7Ctwcon%5Es1_&ref_url=https%3...

SSSalvi

Russian craft Tweet:

Roscosmos reported that #Luna25 successfully separated from the Fregat upper stage and is on its way to the Moon: https://t.me/roscosmos_gk/10427

https://twitter.com/katlinegrey/status/ ... 4161192960
https://twitter.com/katlinegrey/status/ ... 60/photo/1

SSSalvi

https://www.isro.gov.in/Current_Space_S ... sment.html

SSSalvi

Chupa Rustom! Went un-noticed Earth 🌏 viewed by Lander Imager (LI) Camera on the day of the launch & Moon 🌑 imaged by Lander Horizontal Velocity Camera (LHVC) a day after the Lunar Orbit Insertion. When everyone is looking at ISRO handle , SAC Ahmedabad, who developed these cameras published on ...

SSSalvi

Latest tweeter post by ISRO:

The retrofiring of engines brought it closer to the Moon's surface, now to 170 km x 4313 km.

SSSalvi

Horizons updated
Apolune : 6.053490647869025E+03 kms
SMA : 3.980368646406959E+03 Kms

Hats off to Amberg,s back of the table napkin calculator

SSSalvi

Current Orbit around Moon with updated Status: As on 8Aug 9:30 IST https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEif6KXE3KmGhDnu1XVjtuAegoS7bbqrG6l1zVfMtpXcwyA-zmki27Pu4EWZj7hN6Y4HENaIQkcKgEHnFyEoW0CJxDTDPGc4fYZntqcEle3UiPrptfs7cXj8IVt2ZRBolLZmN3xBaWQIODZBeUi411KmhkBxh6w-_cPK28fxU-OmsoRG...

SSSalvi

^^^ suryag post : Done some extensive search... CH1:launched on a PSLV . 256 x 22,866 km x 17.8 deg > i 37,000 km> 73,000 km > 387,000 km. Chandrayaan 2 was launched on(GSLV) Mark III. (170 x 40400 km altitude) [ There is an interesting side show: Instead of shutting off last stage at intended Launc...

SSSalvi

^^^
Thrilling to see going from light to darkness. To remind its purpose... Tamaso maa... Jyotirgamaya.
Let there be no darkness
Make the things bright.. unveil the hidden region

BTW, publication of 1st image by Boss.. not chief.

SSSalvi

Landing location ( within 2 3 kms margin) is mentioned in mission document published by ISRO

SSSalvi

The next Lunar bound orbit maneuver is scheduled for August 6, 2023, between 22:30 and 23:30 Hrs. IST.

SSSalvi

Stupid q: Is the firing to reduce the orbit done at apogee or perigee? Why? Does it reverse for increasing the orbit? General rule dictated by Mr. Kepler .....Firing at one end changes the other end. Fire to add velocity will increase other end altitude and Fire in reverse direction of motion to re...

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