Washington: A satellite that aims to help weather forecasters predict extreme storms and offer scientists a better view of climate change is being readied for launch this month, NASA has said.

The 1.5 billion dollar National Polar-orbiting Operational Environmental Satellite System Preparatory Project (NPP) is the first to measure both short and long term changes in weather and climate, the US space agency said.

The launch is scheduled for Thursday, October 27 from Vandenberg Air Force Base in California between 1518 IST and 1527 IST.

"This is really the first mission that is designed to provide observations for both weather forecasters and climate researchers," said Jim Gleason, NPP project scientist.

The SUV-sized satellite will carry five instruments to study temperature and water in the atmosphere, how clouds and aerosols affect temperature, and how plants on land and in the ocean respond to environmental changes.

"The future of the environment is as much tomorrow's weather as it is long term climate," Gleason told reporters.

"NPP's observations will help scientists better predict the future environment and these predictions are incredibly valuable for economic, security and humanitarian reasons."

The satellite is one of 14 Earth observation missions currently being managed by NASA. Project managers said they hope it will operate for about five years.

The timing could not be better, after a year in which the United States saw 10 major and costly weather events from tornadoes to hurricanes according to Louis Uccellini, director of the National Oceanic and Atmospheric Administration's National Centres for Environmental Prediction.

"2011 has been the year of the billion-dollar weather disasters," Uccellini said, listing off a series of 10 fires, floods, tornadoes and hurricanes that cost the United States one billion dollars each.

"We expect to improve our forecast skills and extend those forecast skills out to five to seven days in advance for hurricanes, severe weather outbreaks and other extreme weather events," he said.

He added that the satellite is carrying infrared and microwave instruments that are "basically equivalent to a slight improvement over what we are using with the European satellites."

However, since NPP will circle the Earth at a height of 820 kilometres and will be in a polar orbit, it will help fill in data gaps left by European weather observatories, he said.