ATK will integrate EMCORE's solar panels into its heritage-designed solar arrays for final flight configuration for the GPIM satellite.

ALBUQUERQUE, N.M., May 21, 2013 -- EMCORE Corporation

(Nasdaq:EMKR), a leading provider of compound semiconductor-based components
and subsystems for the fiber optic and solar power markets, announced today
that it has been awarded a contract by ATK (NYSE:ATK) to design and
manufacture solar panels for NASA's Green Propellant Infusion Mission (GPIM)
planned for launch in 2015.

Solar panels populated with EMCORE's most advanced ZTJ triple-junction solar
cells will power a satellite that will carry the GPIM payload.
ATK will integrate EMCORE's solar panels into its heritage-designed solar
arrays for final flight configuration for the GPIM satellite.

The GPIM project will demonstrate the practical capabilities of AF-M315E, a
high-performance green alternative to hydrazine that has traditionally been
used to fuel many spacecraft. This innovative, low-toxicity propellant is
expected to improve overall vehicle performance. It boasts a higher density
than hydrazine, meaning that more can be stored in containers of the same
volume, and it delivers a greater thrust per given quantity of fuel.

GPIM is supported by co-investigators including NASA's Glenn Research Center
and the U.S. Air Force Research Laboratory at Wright-Patterson Air Force
Base in Ohio; Aerojet Corporation, a GenCorp company in Washington; NASA's
Kennedy Space Center in Florida; and the U.S. Air Force Space & Missile
Systems Center at Kirtland Air Force Base in New Mexico.

"ATK is pleased to be providing the solar arrays for the GPIM project to
Ball Aerospace, and we look forward to another successful collaboration with
EMCORE in support of this innovative program," said Dave Messner, General
Manager of ATK Space Systems in Goleta, Calif.

"EMCORE is extremely pleased and honored to receive this program award from
ATK," said Brad Clevenger, Ph.D., General Manager of EMCORE's Photovoltaics
Division. "EMCORE has partnered with ATK on many successful missions, and we
greatly value our long-standing business relationship. We look forward to
supporting ATK on the Green Propellant Infusion Mission."

EMCORE is the world's leading manufacturer of highly-efficient
radiation-hard solar cells for space power applications. With a
Beginning-Of-Life (BOL) conversion efficiency nearing 30% and the option for
a patented, onboard monolithic bypass diode, EMCORE's industry-leading
multi-junction solar cells provide amongst the highest available power to
interplanetary spacecraft and earth orbiting satellites. EMCORE's proven
manufacturing capability, technology leadership and high-reliability solar
cells and panels make us the supplier of choice for demanding spacecraft
power systems.

About EMCORE

EMCORE Corporation offers a broad portfolio of compound semiconductor-based
products for the fiber optics and solar power markets. EMCORE's Fiber Optics
business segment provides optical components, subsystems and systems for
high-speed telecommunications, Cable Television (CATV) and
Fiber-To-The-Premise (FTTP) networks, as well as products for satellite
communications, video transport and specialty photonics technologies for
defense and homeland security applications. EMCORE's Solar Photovoltaics
business segment provides products for space power applications including
high-efficiency multi-junction solar cells, Coverglass Interconnected Cells
(CICs) and complete satellite solar panels. For further information about
EMCORE, visit http://www.emcore.com.

About ATK

ATK is an aerospace, defense, and commercial products company with
operations in 21 states, Puerto Rico, and internationally. Further news and
information about ATK can be found on the Internet at www.atk.com, on
Facebook at www.facebook.com/atk, or on Twitter @ATK.