NORTHWEST
RESEARCH
ENGINEERING,
LLC
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Design and manufacturing of specialized equipment for ionospheric research,
especially for Ionospheric Tomographic imaging Systems (ITS), a coherent receiver design.
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Various ITS Receiver Installations

John Begenisich manning the first installation of an ITS10 Receiver at the HAARP site at Gakona, AK. Note the test equipment and space shared with other experiments.

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Antenna installation at Gakona, Alaska, at the HAARP site. The dimensions of the ground screen are 10' X 20' (3m X 6m). This was the first field deployment of the ITS Receiver System.

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Outside view of the equipment shelter at Science Pad 1 at the HAARP site.

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The idea of a mesh is to let the snow fall through. It does not always work, but the snow was dry and the data was still good.

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TS30I installation at Ascension Island operated by the University of Bath, UK. The receivers have been modified to act as an Interferometer; the antennas are separated by 500 meters (N-S).

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Installation at Ascension Island (one of four). Snow is not an issue, so there is no need to elevate the structure.

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At Qaanaaq, Greenland (76 degrees North Latitude), the ITS10 shared rack space with many other instruments as part of a Danish weather observatory.

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Installation at Qaanaaq, Greenland. The ground plane is a 1.5 m x 1.5 m piece of fencing mesh fitted over an aluminum frame.

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Initial installation of an ITS10 Receiver at Cordova High School. The conflict with student-teacher activities and poor antenna reception caused this site to be quickly abandoned.

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The antenna installed at Cordova High School utilizes a 1.5 x 1.5 meter ground plane. The antenna / ground-plane assembly is lightweight (albeit awkward) and easily movable by one person.

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The present Cordova, Alaska installation is at Cordova Auto Rental. The ITS10S receiver shares space with a Naval Research Labs receiver in a cabinet in the tiny lobby of the rental office.

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Old-Style ITS10 (2-band) antenna at Cordova, Alaska. The antenna is positioned on top of an 8 foot x 40 foot shipping container. Since the container is all metal, it serves as an excellent ground plane. However, occasionally, snow must be swept off.

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This ITS30 installation is at the Aquarium Research Facility at CheCheng in southern Taiwan. This is one of 3 ITS30 installations in Taiwan.

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Antenna installation at Checheng, Taiwan, with the Taiwan Straits in the background. Note the protective dome over the antenna, and the 1.5 m x 1.5 m flat metal ground plane.

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When used for mobile operations, the ITS30m and a laptop ride to the required site in the passenger seat. The antenna is transported in the back of the vehicle, and is set up once on site.

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This is a mobile setup wherein the antenna can be located at a specific latitude and longitude. The antenna is transported inside the vehicle and set up at the desired site. The Receiver and laptop computer are operated from the vehicle battery through a power invertor. This arrangement is in support of operations at the HAARP facility, Gakona, Alaska.

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This view is of another mobile installation using a larger vehicle which allows the receiver to be placed in the back. While somewhat more difficult for the driver to access, it provides much more room for cables.

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This picture shows a mobile setup where the antenna is set up on the ground about 25 feet from the vehicle. This arrangement greatly lessens the chance of a signal-destroying feedback between the receiver and the antenna. Note the small (3' x 6') ground plane. The antenna pattern from this configuration is quite good.

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This is an installation in San Lorenzo, California.  The station is located in a residence, in an urban neighborhood, and occupies "space-available" in the homeowners' office.
The antenna is mounted atop a 12' x 14' pergola, the whole top of which is covered with metal mesh fencing material as ground screen.  This is a particularly good installation considering the urban environment.


This station is installed at a residence near Medford, Oregon.  The receiver and computer are located in a spare 'office' in the home.  The receiver was collecting data at the time the picture was taken. The antenna being installed in the backyard of the residence.  Neither the proximity of the barbed-wire fence, nor the positioning of the LNA Module (above the ground screen) is ideal, and the ground screen is rather too small for close-to-the-horizon observations.  Data from higher elevation satellite passes, however, seems to be satisfactory.
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Contact: Frank Smith, Northwest Research Engineering, LLC  10522 Lake City Way NE #C-201, Seattle, WA 98125  206.300.5752
www.nw-re.us