The LCROSS mission is a search for water on the moon. The LCROSS mission is going to do this by sending a rocket crashing into the moon causing a big impact and creating a crater, throwing tons of debris and potentially water ice and vapor above the lunar surface. This impact will release materials from the lunar surface that will be analyzed for the presence of hydrated minerals which would tell researchers if water is there or not. The two main components of the LCROSS mission are the Shepherding Spacecraft (S-S/C) and the Centaur upper stage rocket. The Shepherding Spacecraft guides the rocket to a site selected on the moon that has a high probability of containing water. Because they have only one chance with this mission in finding water, the researchers have to be very precise where they program the Shepherding Spacecraft to guide the rocket.
The Shepherding Spacecraft and Centaur rocket are launched together with another spacecraft called the Lunar Reconnaissance Orbiter (LRO). All three are connected to each other for launch, but then the LRO separates one hour after launch. The Shepherding Spacecraft guides the Centaur rocket through multiple Earth orbits, each taking about 38 days.
The rocket then separates from the Shepherding Spacecraft and impacts the Moon at more than twice the speed of a bullet, causing an impact that results in a big plume or cloud of lunar debris, and possibly water. While this is happening the Shepherding Spacecraft, which has scientific instruments on-board including cameras, is taking pictures of the rocket’s descent and impact into the moon.
Four minutes later, the Shepherding Spacecraft follows almost the exact same path as the rocket, descending down through the big plume and analyzing it with special instruments.
The analysis is specifically looking for water (ice and vapor), hydrocarbons and hydrated materials. The Shepherding Spacecraft is collecting data continuously and transmitting it back to Earth before its own demise. This crash will be so big that we on Earth may be able to view the resulting plume of material it ejects with a good amateur telescope.
The science payload consists of a total of nine instruments consisting of one visible, two near infrared, and two mid-infra- red cameras; one visible and two near-infrared spectrometers; and a photometer. A data handling unit (DHU) collects the information from each instrument for transmission back to LCROSS Mission Control. Due to the schedule and budget constraints, the LCROSS team took full advantage of available rugged, commercially available components.
Although the selected instruments are considered rugged for their intended uses on Earth, space is a harsh environment. The LCROSS payload team put the individual instruments though a rigorous testing cycle that simulated launch and the conditions of space. The team identified design weakness and modifications for space use and worked with the manufac- turers to strengthen their designs. The payload was assembled and underwent additional tests to determine how the system worked together. Once the payload met all testing criteria and the team was satisfied, it was shipped to Northrop Grum- man, Redondo Beach, Calif., for integration into the LCROSS spacecraft.
Instrument checkout and calibration will be performed during the swing-by of the moon 5 days after launch. One hour prior to impact, instruments will be powered on and will return data until impact of the spacecraft.
More from Nasa link
http://lcross.arc.nasa.gov/mission.htmI think its a good mission after all they did it to a comet and got tons
of data that will take years of analysis
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