Discussion in 'Defence & Strategic Issues' started by Indx TechStyle, Oct 6, 2016.
India plans to send seismometer to study moonquakes
4 types of such quakes
Story of the Week
Discovery of new suprathermal proton population around the Moon by SARA onboard Chandrayaan-1
Schematic of the new suprathermal population of protons observed around Moon. The Sun is on the left hand side. Orbit of Chandrayaan-1 is shown by cyan colored dotted curve. The green colored filled circles represent the newly observed population of suprathermal protons, the source of which is located at altitudes >500 km above the dayside surface. The yellow curve shows a sample trajectory of the suprathermal protons - a possible way of transportation from the source location to near the Moon where they are observed by SARA.
Story of the Week - Archive
Jun 27, 2017 : Discovery of new suprathermal proton population around the Moon by SARA onboard Chandrayaan-1
Jun 19, 2017 : Mars Orbiter Mission Completes 1000 Days in Orbit
Jun 10, 2017 : The first developmental flight of GSLV-Mk-III
Jun 05, 2017 : Enhanced use of Space based Applications in Governance and Development- Madhya Pradesh
May 22, 2017 : National Database for Emergency Management (NDEM) Version 3.0 Released
May 15, 2017 : Observing Reservoir and River Water Levels from Satellite Altimetry
May 08, 2017 : NARL MST Radar Observations Help Resolve Ionospheric Echoing Riddle
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India to see two moon missions by March
A look at the TeamIndus spacecraft that will take India to the Moon
TeamIndus is launching its spacecraft to the Moon in 2018. This will be the first time any private entity attempts to land on the lunar surface. We will soon be posting details on how we built our spacecraft to survive the landing. Meanwhile, here’s an overview of our spacecraft.
The TeamIndus spacecraft. Seen here are the solar panels (left) and the mounted rover (right).
The spacecraft has 3 major systems:
Spacecraft Bus: The spacecraft bus consists of the structural skeleton, thermal and propulsion systems.
Avionics: This system houses the on-board computer, power and communications systems.
Payloads: Our rover ECA, the Japanese rover Sorato (which we are also carrying) and all the Lab2Moon experiments are the major payloads onboard the spacecraft.
#1: The structure and thermal systems of the spacecraft
The spacecraft has optical solar reflectors and heat shields to keep itself cool. The lander structure is designed to withstand the impact forces during the launch and landing. The landing gear uses crushable aluminium honeycomb to absorb the impact forces during touchdown on the Moon.
The main structure of the spacecraft that ensures the safety of the subsystems and payloads.
The spacecraft design thus ensures the safety of the payloads and all the subsystems in the spacecraft. The maximum diameter of the spacecraft is decided by the launch vehicle, which for us is the trusty PSLV from ISRO.
The interface ring as shown in the diagram below will be used to connect to the PSLV for launch.
1: TeamIndus spacecraft (older version) in the PSLV envelope. 2: The intersection ring of the spacecraft that docks to the PSLV.
#2: Propulsion system
The primary engine on the spacecraft is a liquid rocket engine with a thrust capability of 440 N for major maneuvers. It is accompanied by sixteen small 22 N thrusters for finer orbital maneuvers and directional control.
Bottom view of the spacecraft showing the primary and the secondary thrusters.
The propellant is provided by the two helium-pressurized tanks onboard the spacecraft. Hydrazine is used as the fuel combined with Nitrogen Tetroxide as the oxidizer. The propulsion is controlled by the Heater Propulsion Card (HPC) onboard the spacecraft.
#3: Power & Communication systems
The three solar panels on the spacecraft are the primary power source, generating 235 W. A 24 Ah Lithium-ion battery is also present for additional power. Spacecraft communication with the control center is handled via the radio S-band and X-band.
Radio frequency bands (in GHz) used for satellite communication. Source: ESA
S-band is the same channel used by NASA for communication with the International Space Station (ISS). The X-band is used for high frequency transmission as in air traffic control and defense applications. A TM/TC card is used for processing both the data that is sent and received.
#4: The on-board computer (OBC)
The on-board computer (OBC) orchestrates the command+telemetry data processing and related operations. The most important job of the OBC is to act as a guidance, navigation and control system (GNC) for the entire mission duration. The lunar descent is controlled through the GNC using data from a host of sensors as detailed in the following post:
TeamIndus Lunar Descent Strategy
The science and art of executing a Moon landingmedium.com
The TeamIndus spacecraft is carrying two of the world’s lightest rovers to the lunar surface. The Indian rover is the ECA a.k.a. Ek Choti si Asha (Hindi for ‘A small hope’), while the Japanese rover is Sorato.The lander will be used to communicate with both the rovers.
1: TeamIndus rover ECA. 2: Japanese rover Sorato. Source: GLXP
The six Lab2Moon experiments designed by students across the world will also go onboard the spacecraft. What’s amazing about these soda-can sized experimentsis that they can help humanity become a multi-planetary species.
This was an overview of the TeamIndus spacecraft. In the coming weeks, we will be diving deeper into each of the subsystems of the spacecraft. Through these articles, we want you to get familiar with all the technology that goes behind building a mission to the Moon.
We want this mission to be inspiring for the next generation of creators and scientists across the world and beyond.
Space is the final frontier that we all must fight towards, together.
@Indx TechStyle Bro, You work in Chd TBRL? Anyway do you know why thrusters for ECA sourced from IHI Japan and not ISRO?
Experience and quality mate, our thrusters haven't been even demonstrated properly while about Japanese robotics.
Obviously, they are a for profit private startup avoiding risks.
Brother is the rover indigenous?
I vaguely remember(from team indus doc) that Team Indus had a plan of hoisting flag on Moon on 26th Jan.
They were planning to brew beer (yeast cells) with some other Institute.
Any info on this
Cdy-2 is indigenous while INA one is Indian one with foreign payloads.
Not having any update but it has been posted in thread earlier.
Moon Mission a calculated risk: Chairman Sivan
Let's do this in Style within IST aka ISRO Standard Timeline.
Code made in Bengaluru to aid moon mission
Oct 12, 2018
ISRO successfully tests Cryogenic Engine (CE-20) for GSLV Mk-III / Chandrayaan-2 Mission
ISRO - Government of India
Mission rescheduled from Jan,03 2019 to Jan 30, 2019.
India’s tryst with Moon: 10 years and two missions
Unloading a PSLV-C11 strap-on from transporter at Vehicle Assembly Building
Soon, India will send its second probe to the Moon — Chandrayaan-2 — for lunar studies
October 22 marks the 10th anniversary of Chandrayaan-1
Isro says the map Chandrayaan-2 will provide from its experiment is expected to yield the firmest conclusions on the distribution of water on the Moon’s surface
PRL develops 3 payloads for India's second lunar exploration mission Chandrayaan-2
While the country's first lunar probe was launched in October 2008, the schedule of the proposed Chandrayaan-2 lift-off is being eagerly awaited. (Image Credit: Twitter)
Oct 26, 2018
CHANDRAYAAN-2 LANDER ACTUATOR PERFORMANCE TEST (LAPT PHASE-2)
LAPT Module tethered to tower crane
ISRO successfully conducts crucial test ahead of Chandrayaan-2’s launch
Lunar lander faces crucial testChandrayaan 2’s landing sensors to be tested at artificial site at Challakere
Chandrayaan-2 not to blast off on Jan 3, Isro yet to fix launch date
Isro chairman Sivan K
The Isro has confirmed it will not launch Chandrayaan-2 — its second lunar mission — on January 3.
It is scrambling to launch the mission at the earliest in 2019, but does not have a date yet.
Isro chairman Sivan K told TOI the space agency was busy with launches in the second half of 2018 and this affected the mission schedule. “We’ll be able to decide on the launch date in 10-12 days,” he added.
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