How 1W transmitters are capable of jamming civilian GPS systems within a 300-mile area around facility?

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Country Global
Category Environment
(Orig.) Publ.Date: 2015-03-15
References The Newport Antenna Measurement Facility radar towers off Newport Road in Newport.
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Website URL http://www.uticaod.com/article/20150315/Opinion/150319620
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ow 1 W transmitters are capable of jamming civilian GPS systems within a 300-mile area around facility?

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NEWPORT RADAR FACILITY: Two guest opinions heat up debate over possible health effects

These guest columns continue the conversation about the levels of electromagnetic radiation that is emitted by the Newport Antenna Measurement Facility. Questions are being raised by a group named "Kuyahoora Valley – What's Making Us Sick," who are pushing for a state investigation. The group is seeking answers as an unusual number of rare cancers have surfaced in their community.

Let me first thank the Observer-Dispatch, Dr. David Carpenter, director of the University at Albany's Institute for Health and the Environment, and Col. David P. Blanks, commander of the Rome Research Site and Deputy Director of the Information Directorate, for all taking part in this discussion.

I keep reminding myself that this is for the children and the families and to assist the community in finding answers to the local cluster of disease in the Newport and immediate surrounding area.

Let me also state that I have the utmost respect for the medical community and the role the military plays in defending our freedoms. My mother, father and brother all served in the military.

I grew up in rural Maine in a town of less than 2,000 people and I have kids, so I can imagine how the health problems must impact the community.

I would like to comment on Col. Blanks’ March 11 O-D guest column from a technical standpoint. I am doing this in hope that the public and military will see that more information is required by the public to fully assess the environmental impact of the Newport Antenna Radiation Pattern Test Facility on the surrounding area.

In my career I have assisted in writing environmental permits and applications and have searched the New York state database and FCC registrations and I find nothing regarding the Newport facility.

Let me start by assuming the colonel is correct and the facility radars tested are “only 1 watt each.”

Assuming that is a correct statement, I would like to ask the colonel how 1 watt transmitters are capable of jamming civilian GPS systems within a 300-mile area around the facility as happened accidently in 1998?

As radio/microwave power densities drop off with the square of the distance from the transmitter, my calculations using 5 watts show that would be impossible, and if true would warrant a Nobel Prize in Physics.

I would also like to ask the colonel what those 10-foot diameter parabolic dishes are in his photograph because my WiFi access point does not have one.

My research shows those 10-foot diameter antennas can boost 1 watt of power to an equivalent isotropic radiated power (EIRP) of 3,162 watts due to a gain of 35 dBi (decibels).

It is important to compare apples to apples, and I disagree with most of what the colonel is saying. Regarding the site, the colonel said “it doesn’t emit various frequencies of electromagnetic radiation” and yet the facilities’ own brochure says they test a full range of frequencies from 0-60 GHz.

This referenced document (www.dtic.mil/dtic/tr/ fulltext/u2/a347013.pdf) states each radar can generate up to 1000 watt (1kW) pulsed power which is then boosted by the 35 dBi antenna to an EIRP of up to 3,162,277 watts each according to my calculations. Multiple that by 5 radars and you can now understand how 15 million watts of pulsed EIRP power can jam civilian airliner GPS systems from hundreds of miles away and also potentially make personnel ill in the surrounding area.

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