Tuesday, November 18, 2008

Images taken by chandrayan

This is the picture of moon's surface taken from lunar orbit by Chandrayaan-1 spacecraft's Terrain Mapping Camera (TMC) on November 13, 2008. Taken over the equatorial region of the moon, the picture shows the uneven surface of the moon with numerous craters. On the lower left, part of the Torricelli crater is seen.




This is the picture of moon's surface taken from lunar orbit by Chandrayaan-1 spacecraft's Terrain Mapping Camera (TMC) on November 15, 2008. Taken over the polar region of the moon, the picture shows many large and numerous small craters. The bright terrain on the lower left is the rim of 117 km wide Moretus crater.

LASER Instrument on Chandrayaan-1 Successfully Turned ON

November 16, 2008

Lunar Laser Ranging Instrument (LLRI), one of the 11 scientific instruments (payloads) carried by Chandrayaan-1 spacecraft, has successfully been turned ON today (November 16, 2008). The instrument was switched ON when the spacecraft was passing over western part of the moon’s visible hemisphere. Preliminary assessment of the data from LLRI by ISRO scientists indicates that the instrument’s performance is normal. LLRI sends pulses of infrared laser light towards a strip of lunar surface and detects the reflected portion of that light. With this, the instrument can very accurately measure the height of moon’s surface features. LLRI will be continuously kept ON and takes 10 measurements per second on both day and night sides of the moon. It provides topographical details of both polar and equatorial regions of the moon. Detailed analysis of the data sent by LLRI helps in understanding the internal structure of the moon as well as the way that celestial body evolved.

Saturday, November 15, 2008

Images From Chandrayaan-1



These two are close up pictures of the moon's surface taken by Moon Impact Probe (MIP) on November 14, 2008 as it approached it after separating from Chandrayaan-1 spacecraft. Please note that these pictures are reproduced as received. (www.isro.org)





Friday, November 14, 2008

അഭിനന്ദനങ്ങള്‍ Indian Tricolour Placed on the Moon !! CONGRATULATIONS

November 14, 2008

In a historic event, the Indian space programme achieved a unique feat today (November 14, 2008) with the placing of Indian tricolour on the Moon’s surface on Pandit Jawaharlal Nehru’s birthday. MIP :Click for Full Image The Indian flag was painted on the sides of Moon Impact Probe (MIP), one of the 11 payloads of Chandrayaan-1 spacecraft, that successfully hit the lunar surface today at 20:31 hrs (8:31 pm) IST. This is the first Indian built object to reach the surface of the moon. The point of MIP’s impact was near the Moon’s South Polar Region. It may be recalled that the modern Indian space programme was initiated in 1962 when Pandit Jawaharlal Nehru was the Prime Minister of India.

Weighing 34 kg at the time of its launch onboard Chandrayaan-1, the box shaped MIP carried three instruments – a video imaging system, a radar altimeter and a mass spectrometer. The video imaging system was intended to take the pictures of the moon’s surface as MIP approached it. The radar altimeter was included to measure the rate of descent of the probe to the lunar surface. Such instruments are necessary for future lunar soft landing missions. And, the mass spectrometer was for studying the extremely thin lunar atmosphere.

MIP’s 25 minute journey to the lunar surface began with its separation from Chandrayaan-1 spacecraft at 20:06 hrs (8:06 pm) IST. This was followed by a series of automatic operations that began with the firing of its spin up rockets after achieving a safe distance of separation from Chandrayaan-1. Later, the probe slowed down with the firing of its retro rocket and started its rapid descent towards the moon’s surface. Information from the its instruments was radioed to Chandrayaan-1 by MIP. The spacecraft recorded this in its onboard memory for later readout. Finally, the probe had a hard landing on the lunar surface that terminated its functioning.

Thus, India’s very first attempt to send a probe to the moon’s surface from its spacecraft orbiting the moon has been successfully concluded.

With the switching ON of two of Chandrayaan-1’s payloads – Terrain Mapping Camera (TMC) and Radiation Dose Monitor (RADOM) – on its journey to moon and with MIP’s successful impact on the lunar surface today, it is planned to switch ON and test the remaining eight payloads of the spacecraft in the coming few days.

Thursday, November 13, 2008

Chandrayaan-1 Successfully Reaches its Operational Lunar Orbit

November 12, 2008
Today, Chandrayaan-1 spacecraft has successfully reached its intended operational orbit at a height of about 100 km from the lunar surface. This followed a series of three orbit reduction manoeuvres conducted during the past three days by repeatedly firing the spacecraft’s 440 Newton Liquid Engine. As part of these manoeuvres, the engine was fired for a cumulative duration of about sixteen minutes. As a result of these manoeuvres, the farthest point of Chandrayaan-1’s orbit (aposelene) from the moon’s surface was first reduced from 7,502 km to 255 km and finally to 100 km while the nearest point (periselene) was reduced from 200 km to 182 km and finally to 100 km.

Tuesday, November 11, 2008

ചന്ദ്രയാന് -1 എടുത്ത ചന്ദ്രന്റെ ചിത്രം

First Lunar Orbit Reduction Manoeuvre of Chandrayaan-1 Successfully Carried Out

November 10, 2008
The first orbit reduction manoeuvre of Chandrayaan-1 spacecraft which is orbiting the moon, was successfully performed yesterday (November 9, 2008)? night. As part of that manoeuvre which began at 20:03 IST, the 440 Newton liquid engine of the spacecraft was fired for about 57 seconds. With this, the nearest point of Chandrayaan-1’s orbit (periselene) from the moon’s surface was reduced from 504 km to 200 km while the farthest point (aposelene) remained unchanged at 7,502 km. In this elliptical orbit, Chandrayaan-1 takes about ten and a half hours to circle the moon once.

Sunday, November 9, 2008

Chandrayaan-1 Successfully Enters Lunar Orbit

November 8, 2008

Chandrayaan-1, India’s first unmanned spacecraft mission to moon, entered lunar orbit today (November 8, 2008). ?This is the first time that an Indian built spacecraft has broken away from the Earth’s gravitational field and reached the moon. This historic event occurred following the firing of Chandrayaan-1 spacecraft’s liquid engine at 16:51 IST for a duration of 817 seconds. The highly complex ‘lunar orbit insertion manoeuvre’ was performed from Chandrayaan-1 Spacecraft Control Centre of ISRO Telemetry, Tracking and Command Network at Bangalore.

Indian Deep Space Network (IDSN) at Byalalu supported the crucial task of transmitting commands and continuously monitoring this vital event with two dish antennas, one measuring 18 m and the other 32 m.

Chandrayaan-1’s liquid engine was fired when the spacecraft passed at a distance of about 500 km from the moon to reduce its velocity to enable lunar gravity to capture it into an orbit around the moon. The spacecraft is now orbiting the moon in an elliptical orbit that passes over the polar regions of the moon. The nearest point of this orbit (periselene) lies at a distance of about 504 km from the moon’s surface while the farthest point (aposelene) lies at about 7502 km. Chandrayaan-1 takes about 11 hours to go round the moon once in this orbit.

The performance of all the systems onboard Chandrayaan-1 is normal. In the coming days, the height of Chandrayaan-1 spacecraft’s orbit around the moon will be carefully reduced in steps to achieve a final polar orbit of about 100 km height from the moon’s surface. Following this, the Moon Impact Probe (MIP) of the spacecraft will be released to hit the lunar surface. Later, the other scientific instruments will be turned ON sequentially leading to the normal phase of the mission.

It may be recalled that Chandrayaan-1 spacecraft was launched on October 22, 2008 by PSLV-C11 from India’s spaceport at Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota. As intended, PSLV placed the spacecraft in a highly oval shaped orbit with a perigee (nearest point to Earth) of 255 km and an apogee (farthest point to Earth) of 22,860 km. In the past two weeks, the liquid engine of Chandrayaan-1 has been successfully fired five times at opportune moments to increase the apogee height, first to 37,900 km, then to 74,715 km, later to 164,600 km, after that to 267,000 km and finally to 380,000km, as planned. During this period, the Terrain Mapping Camera (TMC), one of the eleven payloads (scientific instruments) of the spacecraft, was successfully operated twice to take the pictures, first of the Earth, and then moon.

With today’s successful manoeuvre, India becomes the fifth country to send a spacecraft to Moon. The other countries, which have sent spacecraft to Moon, are the United States, former Soviet Union, Japan and China. Besides, the European Space Agency (ESA), a consortium of 17 countries, has also sent a spacecraft to moon.

courtesy: www.isro.org

Wednesday, November 5, 2008

Chandrayaan-1 enters Lunar Transfer Trajectory

November 4, 2008

The fifth and final orbit raising manoeuvre of Chandrayaan-1 spacecraft was successfully carried out today (November 4, 2008) morning at 04:56 am IST. During this manoeuvre, the spacecraft’s 440 Newton liquid engine was fired for about two and a half minutes. ? With this, Chandrayaan-1 entered the Lunar Transfer Trajectory with an apogee (farthest point to Earth) of about 380,000 km (three lakh eighty thousand km).

The health of the spacecraft is being continuously monitored from the Spacecraft Control Centre at ISRO Telemetry, Tracking and Command Network (ISTRAC) in Bangalore with support from Indian Deep Space Network (IDSN) antennas at Byalalu. Since its launch on October 22 by PSLV-C11, all systems onboard Chandrayaan-1 spacecraft are performing normally. Chandrayaan-1 will approach the Moon on November 8, 2008 and the spacecraft’s liquid engine will be fired again to insert the spacecraft into lunar orbit.


Thursday, October 30, 2008

Chandrayaan-1’s Orbit Closer to Moon

October 29, 2008
The fourth orbit raising manoeuvre of Chandrayaan-1 spacecraft was carried out today (October 29, 2008) morning at 07:38 am IST. During this manoeuvre, the spacecraft’s 440 Newton liquid engine was fired for about three minutes. With this, Chandrayaan-1 entered into a more elliptical orbit whose apogee (farthest point to Earth) lies at 267,000 km (two lakh sixty seven thousand km) while the perigee (nearest point to Earth) lies at 465 km.? Thus, Chandrayaan-1 spacecraft’s present orbit extends more than half the way to moon. In this orbit, the spacecraft takes about six days to go round the Earth once.

The health of the spacecraft is being continuously monitored from the Spacecraft Control Centre at ISRO Telemetry, Tracking and Command Network (ISTRAC) in Bangalore with support from Indian Deep Space Network antennas at Byalalu. All systems onboard the spacecraft are performing normally. One more orbit raising manoeuvre is scheduled to send the spacecraft to the vicinity of the moon at a distance of about 384,000 km from the Earth.



Sunday, October 26, 2008

Chandrayaan-1 enters Deep Space

26 Oct 2008

Chandrayaan-1 spacecraft has entered deep space after crossing the 150,000 km (one and a half lakh km) distance mark from the Earth. This happened after the successful completion of the spacecraft’s third orbit raising manoeuvre today (October 26, 2008) morning.


During this manoeuvre which was initiated at 07:08 IST, the spacecraft’s 440 Newton liquid engine was fired for about nine and a half minutes. With this, Chandrayaan-1 entered a much higher elliptical orbit around the Earth. The apogee (farthest point to Earth) of this orbit lies at 164,600 km while the perigee (nearest point to Earth) is at 348 km. In this orbit, Chandrayaan-1 takes about 73 hours to go round the Earth once.

The antennas of the Indian Deep Space Network at Byalalu are playing a crucial role in tracking and communicating with Chandrayaan-1 spacecraft in such a high orbit. The spacecraft performance is normal. More orbit raising manoeuvres are planned in the coming few days to take Chandrayaan-1 towards the Moon.

Chandrayaan-1 Spacecraft’s Orbit Raised Further

25 Oct 2008

The second orbit-raising manoeuvre of Chandrayaan-1 spacecraft was carried out at 05:48 hrs IST this morning (October 25, 2008) when the spacecraft’s 440 Newton Liquid Engine was fired for about 16 minutes by commanding the spacecraft from Spacecraft Control Centre (SCC) at ISRO Telemetry, Tracking and Command Network (ISTRAC) at Peenya, Bangalore. With this engine firing, Chandrayaan-1’s apogee has been further raised to 74,715 km, while its perigee has been raised to 336 km. In this orbit, Chandrayaan-1 spacecraft takes about twenty-five and a half hours to go round the Earth once. This is the first time an Indian spacecraft has gone beyond the 36,000 km high geostationary orbit and reached an altitude more than twice that height.


It may be recalled that Chandrayaan-1, India’s first spacecraft to Moon, was successfully launched by PSLV-C11 on October 22, 2008 from Satish Dhawan Space Centre SHAR, Sriharikota. The launch vehicle placed Chandrayaan-1 in an elliptical orbit with a perigee (closest point to earth) of 255 km and apogee (farthest point to earth) of 22,860 km. The first orbit-raising manoeuvre was performed on October 23, 2008 by firing the spacecraft’s liquid engine for 18 minutes resulting in the increase of the spacecraft orbit’s apogee to 37,900 km and the perigee to 305 km. The Indian Deep Space Network (IDSN) at Bylalu is tracking the spacecraft in the present orbit, receiving signals in S and X bands and is sending commands to the spacecraft.

All systems onboard the spacecraft are functioning normally. Further orbit raising maneuvers to take Chandrayaan-1 to still higher orbits are planned in the next few days.

Chandrayaan-1 Spacecraft’s Orbit Raised

23 Oct 2008


The first orbit-raising manoeuvre of Chandrayaan-1 spacecraft was performed at 09:00 hrs Indian Standard Time (IST) this morning (October 23, 2008) when the spacecraft’s 440 Newton Liquid Engine was fired for about 18 minutes by commanding the spacecraft from Spacecraft Control Centre (SCC) at ISRO Telemetry, Tracking and Command Network (ISTRAC) at Peenya, Bangalore. With this engine firing, Chandrayaan-1’s apogee has been raised to 37,900 km, while its perigee has been raised a little, to 305 km. In this orbit, Chandrayaan-1 spacecraft takes about 11 hours to go round the Earth once.

Chandrayaan-1, India’s first spacecraft to Moon, was successfully launched by PSLV-C11 yesterday (October 22, 2008) from Satish Dhawan Space Centre SHAR, Sriharikota. The launch vehicle placed Chandrayaan-1 in an elliptical orbit with a perigee (closest point to the earth) of 255 km and apogee (farthest point to earth) of 22,860 km. In this initial orbit, Chandrayaan-1 orbited the Earth once in about six and a half hours. Following its successful launch, the SCC acquired the first signals and conducted preliminary operations on Chandrayaan-1. The Deep Space Network (DSN) at Bylalu tracked the spacecraft in this orbit and received signals in S and X band and has sent commands to the spacecraft.

All systems onboard the spacecraft are functioning normally. Further orbit raising maneuvers are planned in the coming few days.

Saturday, October 25, 2008

chandrayan

Chandrayaan-1 spacecraft undergoing pre-launch tests



Moon Impact Probe integration with Chandrayaan-1 spacecraft



Moon Impact Probe



Readying Chandrayaan-1 spacecraft for Thermovac test




Fully integrated Chandrayaan-1 spacecraft (left) and loading it to Thermovac Chamber (right)

INDIA'S FIRST MISSION TO MOON
CHANDRAYAAN - 1
Announcement of Opportunity (AO)


Purpose of the Announcement of Opportunity (AO)

Through this First Announcement of Opportunity (AO) in the series, the Indian Space Research Organisation (ISRO) solicits Proposals from International and Indian Scientific Community for participating in the mission by providing suitable scientific payloads for Chandrayaan-1.

Chandrayaan-1: Mission Definition and Goal

Chardrayaan-1 is the first Indian Mission to the Moon devoted to high-resolution remote sensing of the lunar surface features in visible, near infrared, X-ray and low energy gamma ray regions. This will be accomplished using several payloads already selected for the mission. In addition a total of about 10 kg payload weight and 10 W power are earmarked for proposals, which are now solicited. The mission is proposed to be a lunar polar orbiter at an altitude of about 100 km and is planned to be launched by 2007-2008 using indigenous spacecraft and launch vehicle of ISRO. The mission is expected to have an operational life of about 2 years.

Mission Objectives

  • Carry out high resolution mapping of topographic features in 3D, distribution of various minerals and elemental chemical species including radioactive nuclides covering the entire lunar surface using a set of remote sensing payloads. The new set of data would help in unravelling mysteries about the origin and evolution of solar system in general and that of the moon in particular.

  • Realize the mission goal of harnessing the science payloads, lunar craft and the launch vehicle with suitable ground support system including DSN station, integration and testing, launching and achieving lunar orbit of ~100 km, in-orbit operation of experiments, communication/telecommand, telemetry data reception, quick look data and archival for scientific utilization by identified group of scientists.

Specific areas of study

  • High resolution mineralogical and chemical imaging of permanently shadowed north and south polar regions

  • Search for surface or sub-surface water-ice on the moon, specially at lunar pole

  • Identification of chemical end members of lunar high land rocks

  • Chemical stratigraphy of lunar crust by remote sensing of central upland of large lunar craters, South Pole Aitken Region (SPAR) etc., where interior material may be expected

  • To map the height variation of the lunar surface features along the satellite track

  • Observation of X-ray spectrum greater than 10 keV and stereographic coverage of most of the moon's surface with 5 m resolution, to provide new insights in understanding the moon's origin and evolution

Saturday, May 31, 2008

Phoenix Takes Another Look Around


Mars, a cold desert planet with no liquid water on its surface, has water ice that lurks just below ground level in its arctic region. Discoveries made by the Mars Odyssey Orbiter in 2002 show large amounts of subsurface water ice in the northern arctic plain. Phoenix will use its robotic arm to dig through the protective top soil layer to the water ice below and ultimately, to bring both soil and water ice to the lander platform for sophisticated scientific analysis

NASA's Mars-Bound Phoenix Adjusts Course Successfully

Scientists have discovered what may be ice that was exposed when soil was blown away as NASA's Phoenix spacecraft landed on Mars last Sunday, May 25. The possible ice appears in an image the robotic arm camera took underneath the lander, near a footpad. "We could very well be seeing rock, or we could be seeing exposed ice in the retrorocket blast zone," said Ray Arvidson of Washington University, St. Louis, Mo., co-investigator for the robotic arm. "We'll test the two ideas by getting more data, including color data, from the robotic arm camera. We think that if the hard features are ice, they will become brighter because atmospheric water vapor will collect as new frost on the ice. "Full confirmation of what we're seeing will come when we excavate and analyze layers in the nearby workspace," Arvidson said. Testing last night of a Phoenix instrument that bakes and sniffs samples to identify ingredients identified a possible short circuit. This prompted commands for diagnostic steps to be developed and sent to the lander in the next few days. The instrument is the Thermal and Evolved Gas Analyzer. It includes a calorimeter that tracks how much heat is needed to melt or vaporize substances in a sample, plus a mass spectrometer to examine vapors driven off by the heat. The Thursday, May 29, tests recorded electrical behavior consistent with an intermittent short circuit in the spectrometer portion. "We have developed a strategy to gain a better understanding of this behavior, and we have identified workarounds for some of the possibilities," said William Boynton of the University of Arizona, Tucson, lead scientist for the instrument. The latest data from the Canadian Space Agency's weather station shows another sunny day at the Phoenix landing site with temperatures holding at minus 30 degrees Celsius (minus 22 degrees Fahrenheit) as the sol's high, and a low of minus 80 degrees Celsius (minus 112 degrees Fahrenheit). The lidar instrument was activated for a 15-minute period just before noon local Mars time, and showed increasing dust in the atmosphere. "This is the first time lidar technology has been used on the surface of another planet," said the meteorological station's chief engineer, Mike Daly, from MDA in Brampton, Canada. "The team is elated that we are getting such interesting data about the dust dynamics in the atmosphere." The mission passed a "safe to proceed" review on Thursday evening, meeting criteria to proceed with evaluating and using the science instruments. "We have evaluated the performance of the spacecraft on the surface and found we're ready to move forward. While we are still investigating instrument performance such as the anomaly on TEGA [Thermal and Evolved Gas Analyzer], the spacecraft's infrastructure has passed its tests and gets a clean bill of health," said David Spencer of NASA's Jet Propulsion Laboratory, Pasadena, Calif., deputy project manager for Phoenix. "We're still in the process of checking out our instruments," Phoenix project scientist Leslie Tamppari of JPL said. "The process is designed to be very flexible, to respond to discoveries and issues that come up every day. We're in the process of taking images and getting color information that will help us understand soil properties. This will help us understand where best to first touch the soil and then where and how best to dig."
for more details read: http://marsweb.jpl.nasa.gov

Tuesday, May 27, 2008

This is a raw, or unprocessed, image taken by the Phoenix lander on Mars, May 25, 2008. This is a screen grab taken from NASA TV.

PHOENIX parachuting down to Mars


NASA's Mars Phoenix Lander can be seen parachuting down to Mars, in this image captured by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. This is the first time that a spacecraft has imaged the final descent of another spacecraft onto a planetary body. From a distance of about 310 kilometers (193 miles) above the surface of the Red Planet, Mars Reconnaissance Orbiter pointed its HiRISE obliquely toward Phoenix shortly after it opened its parachute while descending through the Martian atmosphere. The image reveals an apparent 10-meter-wide (30-foot-wide) parachute fully inflated. The bright pixels below the parachute show a dangling Phoenix. The image faintly detects the chords attaching the backshell and parachute. The surroundings look dark, but corresponds to the fully illuminated Martian surface, which is much darker than the parachute and backshell. Phoenix released its parachute at an altitude of about 12.6 kilometers (7.8 miles) and a velocity of 1.7 times the speed of sound. The HiRISE, acquired this image on May 25, 2008, at 4:36 p.m. Pacific Time (7:36 p.m. Eastern Time). It is a highly oblique view of the Martian surface, 26 degrees above the horizon, or 64 degrees from the normal straight-down imaging of Mars Reconnaissance Orbiter. The image has a scale of 0.76 meters per pixel. This image has been brightened to show the patterned surface of Mars in the background. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems, Denver, is the prime contractor for the project and built the spacecraft. The High Resolution Imaging Science Experiment is operated by the University of Arizona, Tucson, and the instrument was built by Ball Aerospace & Technologies Corp., Boulder, Colo.

PHOENIX PHOENIX PHOENIX

HURRAY

the other Marslander "PHOENIX" landed successfully on Mars.


This image, one of the first captured by NASA's Phoenix Mars Lander, shows the vast plains of the northern polar region of Mars. The flat landscape is strewn with tiny pebbles and shows polygonal cracking, a pattern seen widely in Martian high latitudes and also observed in permafrost terrains on Earth. The polygonal cracking is believed to have resulted from seasonal freezing and thawing of surface ice. Phoenix touched down on the Red Planet at 4:53 p.m. Pacific Time (7:53 p.m. Eastern Time), May 25, 2008, (about 7:23 am of May 26, 2008 in India time) in an arctic region called Vastitas Borealis, at 68 degrees north latitude, 234 degrees east longitude. This is an approximate-color image taken shortly after landing by the spacecraft's Surface Stereo Imager, inferred from two color filters, a violet, 450-nanometer filter and an infrared, 750-nanometer filter. The Phoenix Mission is led by the University of Arizona, Tucson, on behalf of NASA. Project management of the mission is by NASA's Jet Propulsion Laboratory, Pasadena, Calif. Spacecraft development is by Lockheed Martin Space Systems, Denver.

Friday, March 21, 2008

Milestones-4


01-Apr-2005
One Step Closer to Launch: Rocket Delivery

Lockheed Martin just delivered the Atlas V rocket to Cape Canaveral! The rocket will now go through a series of tests to ensure it's ready to send Mars Reconnaissance Orbiter to the red planet. Lift-off is expected on August 10, 2005.

Tuesday, January 8, 2008

Milestones-3

18-May-2005 Getting Closer to Countdown: Spacecraft Undergoes Readiness Tests
It's no easy task getting Mars Reconnaissance Orbiter ready for launch. Workers stabilized the crane holding one of the enormous billboard-sized solar panels temporarily removed from the spacecraft prior to rigorous testing. This test is one of many "checkups" the spacecraft must undergo to verify its readiness for launch.

Sunday, January 6, 2008

Milestones-2

30-Apr-2005
Next Vital Step: Spacecraft Delivery

The Mars Reconnaissance Orbiter was delivered in two large containers from Lockheed Martin to Cape Canaveral on an Air Force C-17 cargo plane. Over the next several months, engineers and technicians would prepare the spacecraft for its scheduled launch in August.