The first
of an advanced batch of Earth-watching satellites is poised to rocket spaceward
Wednesday after a year of delays that have plagued its weather forecasting
mission.
A Boeing Delta
4 rocket is set to launch the GOES-N satellite - one of a three new
spacecraft aimed at monitoring changes in Earth's weather and environment -
from Florida's Cape Canaveral Air Force Station at 6:11 p.m. EDT (2011 GMT). Technical
problems - including a last-minute launch
scrub - and Boeing's worker strike
last year have delayed the mission from its initial May 2005 target.
"It's been
a long, challenging effort," said Andre Dress, NASA's GOES deputy program
manager at Goddard Space Flight Center, Tuesday during
a prelaunch briefing. "This satellite does represent the latest in satellite
technology and promises to improve performance over its predecessor."
The $481-million
GOES-N - short for Geostationary Operational Environmental Satellite-N -
spacecraft will carry extremely precise imaging and sounding instruments capable
of resolving storm features down to 1.2 miles (two kilometers) from its
geosynchronous perch 22,000 miles (35,405 kilometers) above Earth.
Weather
satellites are a key asset for forecasters, especially as the 2006 Atlantic
Basin hurricane season - which begins June 1 - approaches, said Steve Letro, the meteorologist-in-charge for the National
Weather Service's forecast office in Jacksonville, Florida.
"There is very
little in our arsenal which allows us to gather data from the entire ocean
basin around a storm," Letro said, adding that only satellites can provide those
necessary weather pattern observations on an hourly basis or faster.
In addition
to its Earth-watching instruments, GOES-N carries a Solar X-ray Imager and
Space Environment Monitor to track space weather and Sun activity. The
satellite can also serve as an emergency relay by using a search and rescue
transponder to bounce distress signals from their origin to recovery crews,
mission managers said.
GOES-N's mission
will add a second spare satellite to aid the weather forecasting efforts of the
National Oceanic and Atmospheric Administration (NOAA). NOAA is working with
NASA on the planned spaceflight, which has a 60 percent chance of launching
during its one-hour window on Wednesday, mission weather officials said.
NOAA currently
operates GOES-10 and GOES
11 to track daily weather and severe storms, such as hurricanes and
tornadoes, with another satellite - GOES-12
- in a storage orbit. Mission managers plan to rename GOES-N as the observation
system's 13th satellite once final post-launch checks are complete,
then place it into a storage orbit until GOES-10 is retired.
"We have
been storing satellites on orbit since 1997," NOAA's GOES program manager Steve
Kirkner told reporters during the briefing, adding that orbital storage can
save more than $3 million in ground storage costs.
NOAA plans
to launch two followers - GOES-O and GOES-P - to fly in GOES-N's wake. Kirkner said
GOES-O is currently targeted for an April 2008 launch to be followed in October
2009 by GOES-P.
NASA will
broadcast the GOES-N launch live on NASA
TV beginning at 6:00 p.m. EDT (2000 GMT) on Wednesday. You are invited to
follow along with the planned space shot using SPACE.com's NASA TV feed
by clicking here.