In January this year, NASA has launched $1-billion Soil Moisture Active Passive (SMAP) satellite with an aim to map global soil moisture. On Thursday, NASA officials said they have lost the use of one of the two important radars.

In comparison to the radar that is in no more working condition, the second instrument's level of detail is quite limited. The high-powered radar system, which was able to gather data in swaths of land that are as small as 2 miles across, stopped working in July. NASA said that investigation is taking place to know the cause of the failure.

SMAP has been designed to spend at least three years in orbit. It will take measurements on the amount of water in the upper two inches of the earth's soil. Lead researcher Dara Entekhabi, professor at the Massachusetts Institute of Technology, said that the project will make it best efforts to meet the expectations of the science community.

In order to fill in eth gaps, Dara said they will use advanced data processing along with the data from the mission. "What I will miss most about the SMAP radar is the opportunity for chance discovery. It was unique among the other instruments in orbit now because it provided frequent microwave mapping of the Earth's surface", said Dara.

The other instrument continues to perform its tasks of receiving, utilizing the same lasso antenna. Currently, scientists estimate soil moisture with the help of computer modeling.