Re: [Repeater-Builder] 449 MHz Wind Profiler Radar?

[Joe]

I agree with Chuck,

This is according to an EPA site:

Prototypes:
404 MHZ (74 cm) profiler developed for the
Wind Profiler Demonstration Network
(WPDN) in 1988.
449 MHZ (67 cm) profiler operates at the
approved frequency for UHF profilers and will
eventually replace the 404 MHZ units.

Joe

Chuck Kelsey wrote:
> According to the NOAA site:
>
> "The original network consisted of (31) 404 MHz profiler sites located in 
> the central United States and one site in Alaska. Since January of 2000, 
> there are (32) 404 MHz profilers in the central United States and three 449 
> MHz profilers in Alaska."
>
> The press release indicated that they would all move to 449 MHz.
>
> Chuck
> WB2EDV
>
>
>
> - Original Message - 
> From: "MCH" 
> To: 
> Sent: Wednesday, March 31, 2010 8:13 PM
> Subject: Re: [Repeater-Builder] 449 MHz Wind Profiler Radar?
>
>
>   
>> No - I recall when this was mentioned
>> being at 449 MHz about 10 years ago.
>>
>> Joe M.
>>
>>
>> 
>   

Re: [Repeater-Builder] 449 MHz Wind Profiler Radar?

[Chuck Kelsey]

According to the NOAA site:

"The original network consisted of (31) 404 MHz profiler sites located in 
the central United States and one site in Alaska. Since January of 2000, 
there are (32) 404 MHz profilers in the central United States and three 449 
MHz profilers in Alaska."

The press release indicated that they would all move to 449 MHz.

Chuck
WB2EDV



- Original Message - 
From: "MCH" 
To: 
Sent: Wednesday, March 31, 2010 8:13 PM
Subject: Re: [Repeater-Builder] 449 MHz Wind Profiler Radar?


> No - I recall when this was mentioned
> being at 449 MHz about 10 years ago.
>
> Joe M.
>
> 

Re: [Repeater-Builder] 449 MHz Wind Profiler Radar?

[MCH]

No - I recall when this was mentioned
being at 449 MHz about 10 years ago.

Joe M.

Chuck Kelsey wrote:
> 
> 
> I don't think that they've been at 449 MHz. That's the new part. They 
> were much lower in the band.
>  
> Chuck
> WB2EDV
>  
>  
> 
> - Original Message -
> *From:* Nate Duehr <mailto:n...@natetech.com>
> *To:* Repeater-Builder@yahoogroups.com
> <mailto:Repeater-Builder@yahoogroups.com>
> *Sent:* Wednesday, March 31, 2010 3:32 PM
> *Subject:* Re: [Repeater-Builder] 449 MHz Wind Profiler Radar?
> 
> They've been operating for almost a decade, or more... I remember
> there's being a kerfluffle when they were first announced.  After
> they proved not to be much of an interference source, it got quiet.
> 
> 
> 
> 

Re: [Repeater-Builder] 449 MHz Wind Profiler Radar?

[Paul Plack]

Nate, as noted in the original posting, (below,) they've been at 404 MHz since 
1992, and they're apparently wide enough to be taking out 406 MHz personal 
locator beacons.

Granted, that would be a bigger issue for satellites looking down at radar 
pointing up, but it'll probably still be "Son of Pave Paws."

73,
Paul, AE4KR

  - Original Message - 
  From: Paul Plack 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Tuesday, March 30, 2010 8:27 PM
  Subject: [Repeater-Builder] 449 MHz Wind Profiler Radar?




  Did I miss this in an earlier thread, or is this a surprise?

  Paul, AE4KR

  

  Honeywell Wins Contract to Build 449 MHz Wind Profiler

  PHOENIX, March 29, 2010 -- Honeywell (NYSE: HON) today announced that it has 
been awarded a $49 million contract to upgrade the National Weather Service's 
radar wind profiler network that will predict severe storms earlier and provide 
the public with more accurate warnings of upcoming storms.

  "For nearly two decades, ground weather radar improvements have been mostly 
incremental - yet weather patterns and storms around the globe have become more 
severe," said Vince Trim, president, Honeywell Technology Solutions, Inc. 
"Honeywell is building a ground radar wind profiler network that can predict 
severe storms earlier and more reliably while better able to withstand 
hurricane force winds year after year."

  Honeywell's work on the production phase of the Next Generation National 
Oceanic and Atmospheric Administration (NOAA) Profiler Network contract 
includes upgrading the NOAA network of wind profilers that provide upper air 
wind data for crucial weather forecasting tasks.

  The NOAA Profiler Network has been operating continuously since 1992 and the 
equipment is now unsupportable. Honeywell's solution, which includes upgrades 
to the antenna, RF hardware, signal processing, networking, and other system 
components will provide the technology improvements to bring the profiler 
network up to a supportable, maintainable, and reliable level. Honeywell will 
change the radio frequency of existing 404 MHz profilers by replacing them with 
449 MHz systems. This will prevent the existing interference with search and 
rescue satellite-aided tracking transponders...



  

Re: [Repeater-Builder] 449 MHz Wind Profiler Radar?

[Nate Duehr]

On 3/31/2010 1:52 PM, Chuck Kelsey wrote:


I don't think that they've been at 449 MHz. That's the new part. They 
were much lower in the band.




That could be true... didn't remember where they were... maybe they were 
down in the weak-signal portion of the band, and that's why I remembered 
it... being a 432 aficionado...


Nate WY0X

Re: [Repeater-Builder] 449 MHz Wind Profiler Radar?

[Chuck Kelsey]

I don't think that they've been at 449 MHz. That's the new part. They were much 
lower in the band.

Chuck
WB2EDV


  - Original Message - 
  From: Nate Duehr 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Wednesday, March 31, 2010 3:32 PM
  Subject: Re: [Repeater-Builder] 449 MHz Wind Profiler Radar?




  They've been operating for almost a decade, or more... I remember there's 
being a kerfluffle when they were first announced.  After they proved not to be 
much of an interference source, it got quiet.

Re: [Repeater-Builder] 449 MHz Wind Profiler Radar?

[Nate Duehr]

On 3/30/2010 8:27 PM, Paul Plack wrote:


Did I miss *this 
* 
in an earlier thread, or is this a surprise?

Paul, AE4KR

Honeywell Wins Contract to Build 449 MHz Wind Profiler



They've been operating for almost a decade, or more... I remember 
there's being a kerfluffle when they were first announced.  After they 
proved not to be much of an interference source, it got quiet.


I haven't ever seen any significant interference problems from our 
"local" one (up near Ft. Collins).  The antennas are at ground level, 
and generally radiate straight up.  (I'm sure there's side-lobes, but 
we've never heard anything significant from the one installed "near" 
here... the engineer for our local one is a ham, if he's still there, I 
believe.)


We have the added benefit that we're high out, low in 'round here, so 
the repeater's outputs are up there... and easily cover up any noise 
that thing might be making...


Nate WY0X

[Repeater-Builder] 449 MHz Wind Profiler Radar?

[Paul Plack]

Did I miss this in an earlier thread, or is this a surprise?

Paul, AE4KR



Honeywell Wins Contract to Build 449 MHz Wind Profiler

PHOENIX, March 29, 2010 -- Honeywell (NYSE: HON) today announced that it has 
been awarded a $49 million contract to upgrade the National Weather Service's 
radar wind profiler network that will predict severe storms earlier and provide 
the public with more accurate warnings of upcoming storms.

"For nearly two decades, ground weather radar improvements have been mostly 
incremental - yet weather patterns and storms around the globe have become more 
severe," said Vince Trim, president, Honeywell Technology Solutions, Inc. 
"Honeywell is building a ground radar wind profiler network that can predict 
severe storms earlier and more reliably while better able to withstand 
hurricane force winds year after year."

Honeywell's work on the production phase of the Next Generation National 
Oceanic and Atmospheric Administration (NOAA) Profiler Network contract 
includes upgrading the NOAA network of wind profilers that provide upper air 
wind data for crucial weather forecasting tasks.

The NOAA Profiler Network has been operating continuously since 1992 and the 
equipment is now unsupportable. Honeywell's solution, which includes upgrades 
to the antenna, RF hardware, signal processing, networking, and other system 
components will provide the technology improvements to bring the profiler 
network up to a supportable, maintainable, and reliable level. Honeywell will 
change the radio frequency of existing 404 MHz profilers by replacing them with 
449 MHz systems. This will prevent the existing interference with search and 
rescue satellite-aided tracking transponders...