India’s geosynchronous satellite TV for PC release car, GSLV MK-III-M1 efficiently released Chandrayaan-2 spacecraft at 2:43 p.m. IST on July 22,2019 into its planned orbit with a perigee (nearest factor to earth) of 169.7 km and an apogee (farthest factor to earth) of 45475 km. The release took place from the second launch pad at Satish dhawan space Centre Shar, Sriharikota.

The Chandrayaan-2 is an Indian space studies employer (ISRO) lunar project comprising an orbiter and lander (Vikram) wearing a rover (Pragyan). The moon is the closest cosmic frame at which area discovery may be tried and documented. However its south polar area has by no means been explored by means of any country before. This is the first area mission to behavior a soft landing at the moon's south polar location which has a lunar floor vicinity lots larger than that of the north pole and stays in shadow.

The GSLV MK-III in order to carry Chandrayaan 2 to its unique orbit is India's maximum powerful launcher so far. The assignment existence of the orbiter is three hundred and sixty five days and the Metre-long rover has an predicted lifestyles of 14 earth days (one lunar day). In order to test the spacecraft's lander Vikram, ISRO recreated lunar floor at its lunar terrain test facility in Challakere technological know-how town, Bengaluru.

The soil used for this check become sourced from a few sites near Salem in Tamilnadu. geologists of numerous national groups had found that it had the ‘Anorthosite’ rock that rather suits lunar soil in composition and functions. The name Vikram way Valour in Hindi. It changed into named after the daddy of the Indian area Programme, Vikram Sarabhai. Chandrayaan-2 may have 14 Indian payloads or study gadgets consisting of scientific ones to look at topography, seismography, mineral identification and distribution, and surface chemical composition.

After its release on July 15, it's going to take fifty three to fifty four days to journey the 3.eighty four Lakh km from the earth to the moon’s surface. After the injection of chandrayaan-2 spacecraft, a series of maneuvers can be finished using its On board propulsion device to raise its orbit and area it within the lunar transfer trajectory. On entering moon's sphere of impact, on-board Thrusters will slow down the spacecraft for lunar seize. Ultimately the orbit of chandrayaan-2 across the moon can be Circularised to a 100x100 km orbit via a series of orbital maneuvers.

On the day of landing, the lander (Vikram) will separate from the orbiter and then will perform a sequence of complicated maneuvers comprising of rough braking and first-class braking. Imaging of the touchdown web site region prior to touchdown can be done for locating safe and danger-unfastened zones. Vikram will try and make a gentle touchdown in a excessive simple among  craters Manzinus c and Simpelius n at a range of approximately 70° south on 7th September 2019.

Finally, the rover (Pragyan) will roll out and carry out experiments on lunar surface for a length of 1 lunar day that is equal to 14 earth days. The undertaking life of Vikram is also 1 lunar day. The orbiter will maintain its assignment for a length of 365 days.


GSLV MK III


About the Launch Vehicle

GSLV MK-III, chosen to release Chandrayaan-2 spacecraft, is a three-degree heavy lift release car advanced by way of ISRO. The vehicle has  stable strap-ons, a core liquid booster and a cryogenic top stage. GSLV MK-III is designed to hold 4 ton magnificence of satellites into geosynchronous transfer GSLV MK-II.

The two strap-on cars of GSLV MK-III are placed on both aspect of its center liquid booster. Precise as ‘S200’, each consists of 205 lots of composite stable propellant and their ignition effects in car carry-off. S200s feature for 140 Seconds. In the course of strap-ons functioning section, the 2 clustered Vikas liquid engines of L110 liquid core booster will ignite 114 sec after lift -off to similarly increase the thrust of the automobile. Those two engines preserve to function after the separation of the strap-ons at approximately one hundred forty seconds after raise -off.

the primary experimental flight of LVM3, the LVM3-X/CARE undertaking lifted off from Sriharikota on December 18, 2014 and successfully examined the atmospheric section of flight. Crew module atmospheric reentry test become also achieved on this flight. The module reentered, deployed its parachutes as deliberate and splashed down inside the bay of Bengal.

The primary developmental flight of GSLV MK-III, the GSLV MK-III-D1, effectively placed GSAT-19 satellite to a geosynchronous switch orbit (GTO) on June 05, 2017 from SDLC SAHAR, Sriharikota.

GSLV MKIII-D2, the second one developmental flight of GSLV MKIII effectively released GSAT-29, a excessive throughput communication satellite on November 14, 2018 from Satish dhawan space Centre SAHAR, Sriharikota.

GSLV MKIII-M1, efficiently injected chandrayaan-2, India’s 2nd lunar task, in to earth parking orbit on July 22, 2019 from Satish Dhawan area Centre SAHAR, Sriharikota


Geosynchronous Satellite Launch Vehicle Mark-III (GSLV Mk-III)

The GSLV Mk-III will carry Chandrayaan 2 to its designated orbit. This three-stage vehicle is India's most powerful launcher to date, and is capable of launching 4-ton class of satellites to the Geosynchronous Transfer Orbit (GTO). Its components are:


  • S200 solid rocket boosters
  • L110 liquid stage
  • C25 upper stage

Mission Objectives:

One of the essential objectives of the first Indian venture to mars is to broaden the technologies required for layout, planning, management and operations of an interplanetary venture. Following are the fundamental objectives of the challenge:


A. Technological goals:


  • Design and realisation of a mars orbiter with a functionality to survive and perform earth bound manoeuvres, cruise phase of three hundred days, mars orbit insertion / capture, and on-orbit phase round mars.
  • deep area conversation, navigation, challenge making plans and control.
  • incorporate independent features to handle contingency situations.
B. Medical goals:

Exploration of mars floor capabilities, morphology, mineralogy and martian atmosphere through indigenous scientific gadgets.

1. Geo Centric Phase
2. Helio Centric Phase
3. Martian Phase

 1. Geo Centric Phase

The spacecraft is injected into an elliptic parking orbit by means of the launcher. With six important engine burns, the spacecraft is regularly maneuvered right into a departure hyperbolic trajectory with which it escapes from the earth’s sphere of have an effect on (soi) with earth’s orbital speed + v enhance. The soi of earth ends at 918347 km from the surface of the earth beyond which the perturbing force at the orbiter is particularly because of the sun. One number one subject is a way to get the spacecraft to mars, on the least amount of gas. ISRO makes use of a way of tour called a hohmann switch orbit – or a minimum energy transfer orbit – to ship a spacecraft from earth to mars with the least quantity of fuel possible.

2. Helio Centric Phase

The spacecraft leaves earth in a direction tangential to earth’s orbit and encounters mars tangentially to its orbit. The flight course is roughly one 1/2 of an ellipse around sun. Ultimately it'll intersect the orbit of mars at the precise moment while mars is there too. This trajectory turns into feasible with certain allowances while the relative function of earth, mars and sun shape an attitude of approximately 44o. Such an arrangement recur periodically at periods of about 780 days. Minimum strength opportunities for earth-mars occur in November 2013, January 2016, May 2018 etc.


3. Martian Phase

The spacecraft arrives at the mars sphere of influence (round 573473 km from the floor of mars) in a hyperbolic trajectory. On the time the spacecraft reaches the closest method to mars (periapsis), it's miles captured into planned orbit around mars via providing ∆v unfashionable that is known as the mars orbit insertion (moi) manoeuvre. The earth-mars trajectory is shown in the above discern. isro plans to release the mars orbiter project throughout the november 2013 window utilising minimal strength transfer possibility.

Mars Orbiter Mission Spacecraft

Mars Orbiter Mission is India's first interplanetary mission to planet Mars with an orbiter craft designed to orbit Mars in an elliptical orbit. The Mission is primarily technological mission considering the critical mission operations and stringent requirements on propulsion and other bus systems of spacecraft. It has been configured to carry out observation of physical features of mars and carry out limited study of Martian atmosphere with following five payloads.


  1. Lift-off Mass 1337 kg.
  2. Structures Aluminium and Composite Fibre Reinforced Plastic (CFRP) sandwich construction-modified I-1 K Bus.
  3. Mechanism Solar Panel Drive Mechanism (SPDM), Reflector & Solar panel deployment.
  4. Propulsion Bi propellant system (MMH + N2O4) with additional safety and redundancy features for MOI. Proplellant mass:852 kg.
  5. Thermal System Passive thermal control system.
  6. Power System Single Solar Array-1.8m X 1.4 m - 3 panels - 840 W Generation (in Martian orbit), Battery:36AH Li-ion.
  7. Attitude and Orbit Control System AOCE (Attitude and Orbit Control Electronics): with MAR31750 Processor.

Sensors Star sensor (2Nos), Solar Panel Sun Sensor (1No), Coarse Analogue Sun Sensor

Actuators: Reaction Wheels (4Nos), Thrusters (8Nos), 440N Liquid Engine

Antennae: Low Gain Antenna (LGA), Mid Gain Antenna (MGA) and High Gain Antenna (HGA)

Launch Site : SDSC SHAR Centre, Sriharikota, India
Launch Vehicle: PSLV - C25

प्रमोचन भार / Launch Mass:           1337 kg
शक्ति / Power:                    840 W
प्रमोचक राकेट / Launch Vehicle:     PSLV-C25
उपग्रह का प्रकार / Type of Satellite:Science & Exploration
निर्माता / Manufacturer ISRO
स्‍वामी / Owner               ISRO
अनुप्रयोग / Application: Planetary Observation
कक्षा का प्रकार / Orbit Type:     Martian

Payloads
  1. Methane Sensor for Mars (MSM)
  2. Mars Color Camera (MCC)
  3. Lyman Alpha Photometer (LAP)
  4. Mars Exospheric Neutral Composition Analyser (MENCA)
  5. Mars Exospheric Neutral Composition Analyser (MENCA)
  6. Thermal Infrared Imaging Spectrometer (TIS)

The mars orbiter venture incorporates 5 payloads to perform its scientific targets. 3 electro-optical payloads operating in the seen and thermal infra-pink spectral degrees and a photometer to experience the mars surroundings & surface. One additional backup payload is planned in case of non-availability of the recognized payloads.



Methane Sensor for Mars (MSM)

MSM is designed to measure methane (CH4) inside the martian ecosystem with PPB accuracy and map its resources. Facts is received handiest over illuminated scene as the sensor measures meditated sun radiation. methane concentration inside the martian ecosystem undergoes spatial and temporal versions. Subsequently global records is amassed all through every orbit.


Mars Coloration Digital Camera (MCC)

This tri-coloration mars colour digicam offers pictures & records about the surface capabilities and composition of martian surface. They may be beneficial to display the dynamic occasions and weather of mars. MCC may also be used for probing the 2 satellites of mars – phobos & deimos. It also presents the context statistics for other science payloads.

Lyman Alpha Photometer (LAP)

Lyman alpha photometer (LAP) is an absorption mobile photometer. it measures the relative abundance of deuterium and hydrogen from Lyman-Alpha emission within the martian higher ecosystem (typically exosphere and exobase). Measurement of d/h (deuterium to hydrogen abundance ratio) lets in us to apprehend specifically the loss technique of water from the planet.

The targets of this instrument are as follows:


  • estimation of d/h ratio
  • estimation of escape flux of h2 corona
  • c. era of hydrogen and deuterium coronal profiles


Mars Exospheric Neutral Composition Analyser (MENCA)

MENKA is a quadruple mass spectrometer capable of analysing the impartial composition within the range of 1 to three hundred amu with unit mass resolution. the history of this payload is from chandra’s altitudinal composition explorer (danger) payload aboard the moon impact probe (mip) in Chandrayan-1 mission.

Thermal Infrared Imaging Spectrometer (TIS)

TIS degree the thermal emission and may be operated throughout both day and night. temperature and emissivity are the 2 fundamental physical parameters envisioned from thermal emission dimension. many minerals and soil sorts have function spectra in TIR vicinity. TIS can map floor composition and mineralogy of mars.

PSLV-C25

PSLV-C25, 25th flight of PSLV released mars orbiter mission spacecraft from the primary launch pad at Satish Dhawan space Centre SAHAR, Sriharikota. The hard PSLV-C25 project become optimised for the release of mars orbiter challenge spacecraft right into a notably elliptical earth orbit with a perigee (nearest aspect to earth) of 250 km and an apogee (farthest component to earth) of 23,500 km with a bent of 19.2 diploma with recognize to the equator.


Ground Segment

ISRO telemetry monitoring and command community (ISTRAC) might be supplying guide of the TTC ground stations, communications community amongst floor stations and manipulate center, manipulate center collectively with laptop structures, garage, information network and manage room facilities, and the help of Indian area technological expertise facts middle (ISSDC) for the mission. The ground section systems shape an included tool supporting both release phase, and orbital phase of the task.

Launch Phase

The discharge automobile is tracked during its flight from improve-off till spacecraft separation with the resource of a community of floor stations, which acquire the telemetry information from the release automobile and transmit it in actual time to the challenge laptop structures at Sriharikota, in which it is processed. The ground stations at Sriharikota, port blair, brunei provide continuous tracking of the PSLV-C25 from liftoff until burnout of zero. 33 degree of PSLV-C25. Ships carrying supply borne terminals (SBT) are being deployed at appropriate locations within the south pacific ocean, to assist the tracking of the launch vehicle from PS4 ignition till spacecraft separation.

Orbital Phase

After satellite TV for PC separation from the release automobile, the spacecraft operations are managed from the spacecraft manipulate Centre in Bangalore. To make sure the preferred insurance for wearing out the venture operations, the floor stations of ISTRAC at Bangalore, Mauritius, brunei, and Biak are being supplemented with the resource of Alcantara and Cuiaba TTC stations of INPE, Brazil, Hartebeestoek TTC station of Sansa and the Dsn network of JPL, NASA.


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