If they are in New Jersey or anyplace on the east coast and only using 40
watts or less, they are getting out phenomenally well LOL. I think they must
be using more than that. Why does it have to run 24/7 ? I always thought
radar operated at much higher frequencies.
"starman" wrote in message
...
Rick KB1KIL wrote:
"If you try to fail and succeed, which have you done?"
"Maximus" wrote in message
ink.net...
I received this email reply to my letter regarding intererence from
CODAR
in
New Jersey:
Michael,
I apologize about the interference. What frequencies encompass the
60
meter band?
We (Rutgers University) operate several sites along the New Jersey
coast.
There are many other groups, most academics, who run other sites all
over
the world. There are many users of the data outside the academic
community,
including the Coast Guard, NOAA, and K-12 education
All the systems operate at low power (~ 40 watts). Since there are
many
sites around the world, the operators are making efforts to get
primary
bands for the system. I have already spoken with several SW listeners
and
asked what frequencies we should try and avoid. I was told to try and
stay
below 4.7 MHz.
We are trying to do this. Unfortunately, the FCC is restricting the
frequencies we can use and has asked that we move some of our sites to
4.8
MHz. The primary bands will allow us to stay at the lower frequencies
without having the FCC ask us to move.
I am not sure if our sites are causing your particular interference ,
but
please be aware that the CODAR community is taking steps to get
primary
bands that will not interfere with others. It is difficult, as you
know,
because of all the different users that occupy these bands.
Please do not hesitate to ask any questions that you may have. I hope
that
this information has helped.
Regards,
Josh
http://marine.rutgers.edu/mrs/codar.html
He replied very promptly and was very polite as well as you can see. I
think
they would be responsive to polite letters explaining our concerns as
shortwave listeners within the constraints of the FCC.
I received a similar letter.
I am sorry that you are experiencing this interference. Rutgers
University
operates 6 of these sites along the New Jersey coast. Two are at 24.7
MHz
and the other 4 are at 4.55 MHz. I do not think that they are
responsible
for your interference.
(Your email mentioned that the interference was in the 4.775 khz to
4.805khz
band. I assume that you meant mhz.)
There are other sites operating closer to Maine. I know there are
systems
on Block Island, RI; Nantucket MA; Nauset MA, Race Point, MA; Green
Island,
ME; and Yarmouth, CAN.
The HF Radar sites operate at very low power (40 W) and are used to
measure
the ocean surface currents. This information is used by the Coast Guard
for
Search and Rescue, fisheries research, pollution spill response and
scientific research to name a few.
The operators of these sites have made efforts to work with the
shortwave
listening community. I spent quite a bit of time speaking with several
shortwave listeners to select frequencies that would be less obtrusive.
In
fact, the sites on Block Island, Nantucket and Nauset were originally
set to
operate at 4.45 MHz as per the request of the SW community to try and
keep
our frequencies below 4.7 MHz. These sites operated at 4.45 MHz for 6
months before the FCC requested that we move to 4.8 MHz.
Unfortunately we cannot control the wishes of the FCC. Since we all
have
secondary licenses we are subject to the discretion of the FCC.
I hope that this response has answered some of your concerns. If you
have
any more questions please do not hesitate to ask.
Regards,
Josh
--
73's
Rick
Interesting that the FCC doesn't care if US based CODAR interferes with
international broadcasters in the 60-m band. Apparently the FCC needs to
get some emails about this subject too.
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