Hemisphere GPS Introduces the A21(TM) GPS Antenna

    CALGARY, April 15 /CNW/ - (TSX: HEM) Today, Hemisphere GPS announced the
latest addition to its precision product line - the A21 Antenna. Agricultural
vehicles and equipment, including aircraft, typically generate electrical
"noise" and interference which can compromise the performance of an antenna.
The new A21 antenna is designed to maintain its tracking of GPS and
differential correction signals in these types of environments, and in
high-dynamic applications where the antenna may be turned on its side.
    With its metal base, lower profile, improved Left Hand Circular
Polarization (LHCP) rejection, and ability to filter out an additional 30
decibels of radio band of frequencies, the A21 antenna offers superior noise
rejection. The new antenna will track GPS, SBAS (WAAS, EGNOS, etc.) and
OmniSTAR(R) L-band signals. The A21 Antenna also features a TNC connector,
which has a threaded coupling interface to ensure a secure connection.
    "Our new A21 antenna does a better job of mitigating the interference
from radios, transmitters, and other peripheral electronic equipment," said
Dr. Michael Whitehead, Chief Scientist for Hemisphere GPS. "This means that
even in environments that are typically filled with electronic noise, like an
aircraft cockpit, the A21 antenna will provide a constant, steady and reliable
stream of GPS data and differential corrections."
    David Habig, a pilot with Dixie Dusters from Itta Bena, MS stated, "In
the past, my GPS signal used to drop off when I keyed my radio. I would lose
GPS and have to wait for the signal to come back." In some cases, the GPS
signal would be lost for up to 15 seconds because of radio interference. An
aircraft can cover a good distance in 15 seconds, and losing a signal for that
long can significantly impact the application. Mr. Habig put the new A21
antenna to the test, and was pleased with the results. "I tried to make it
lose GPS signal in my turns, but it did not. This is a big improvement. Anyone
with interference concerns is going to want this antenna."
    The A21 antenna will begin shipping in May 2009, and will be included in
all Hemisphere GPS Air M3(TM), Flying Flagman(R), and LiteStar II(TM) GPS
guidance systems. Current Hemisphere GPS Air GLA-3(TM) antenna owners can also
upgrade to the new A21 antenna. The A21 antenna features the same mounting
footprint as previous Hemisphere GPS Air antennas. The A21 antenna technology
will soon be featured in other Hemisphere GPS product lines as well.

    About Hemisphere GPS

    Hemisphere GPS designs and manufactures innovative, cost-effective GPS
products for positioning, guidance, and machine control applications in
agriculture, marine and other markets. The Company holds numerous patents and
other intellectual property and owns leading brand names, including Outback
Guidance(R) and BEELINE(R), two of the leading brands in precision GPS for
ground agriculture. The Company is headquartered in Calgary, Alberta, with
major product development, sales, and marketing facilities in Arizona, Kansas,
Texas, and Australia. Hemisphere GPS trades on the Toronto Stock Exchange
under the symbol "HEM" and is a component of Standard & Poor's TSX SmallCap
Index. For more information about Hemisphere GPS, please go to

    The above disclosure contains certain forward-looking statements that
involve substantial known and unknown risks and uncertainties. These
forward-looking statements are subject to numerous risks and uncertainties,
certain of which are beyond Hemisphere GPS' control, including: the impact of
general economic conditions, industry conditions, increased competition, the
lack of availability of qualified personnel or management, fluctuations in
foreign exchange or interest rates, stock market volatility and market
valuations of companies with respect to the announced transactions and the
final valuations thereof, and obtaining required approvals of regulatory
authorities. Hemisphere GPS' actual results, performance or achievement could
differ materially from those expressed in, or implied by these forward-looking
statements and, accordingly, no assurances can be given that any of the events
anticipated by the forward-looking statements will transpire or occur, or if
any of them do so, what benefits, including the amount of proceed, that
Hemisphere GPS will derive therefrom.

For further information:

For further information: John Bohlke, Director of Product Marketing,
Hemisphere GPS, Phone: (480) 348-9919 x 7328, E-mail: air@hemispheregps.com,
www.hemispheregps.com; Cory Pala, Investor Relations, E.vestor Communications
Inc., (416) 657-2400, CPala@evestor.com

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