September 8, 2015
A NASA satellite launched just seven months ago lost the use of one of two science instruments, but the space agency said the mission to map global soil moisture will continue.
February 3, 2015
The successful launch of NASA’s Soil Moisture Active Passive (SMAP) satellite on Jan. 31, 2015, promises more accurate measurements of soil dampness. Using microwave pulses, the instrument is able to detect how much moisture is in the ground, because the moisture affects how many microwaves bounce back.
December 31, 2014
Scheduled for launch on Jan. 29, 2015, NASA's Soil Moisture Active Passive (SMAP) instrument will measure the moisture lodged in Earth's soils with an unprecedented accuracy and resolution. The instrument's three main parts are a radar, a radiometer and the largest rotating mesh antenna ever deployed in space. Remote sensing instruments are called “active” when