[FedCom] 400-406 Inquiry

[Chris Parris]

On Dec 20, 2009, at 8:03 PM, MONIX wrote:

> I have been doing some research lately and am wondering what is in the
> 400-406 MHz band?
>
> Apparently it is restricted to only use by US government and  
> Military users!
>
> MONIX


If you look through your copy of the NTIA Redbook, you will see that  
various chunks of spectrum from 399.9 MHz to 406.0 MHz are assigned to  
several services, including:
METEOROLOGICAL AIDS
SPACE OPERATION (space-to-Earth)
EARTH EXPLORATION-SATELLITE (Earth-to-space)
METEOROLOGICAL-SATELLITE (Earth-to-space)

There is also mention of "Fixed & Mobile except aeronautical mobile"  
use, which appears to be some rare federal & military land-mobile use.

There are quite a few uplinks to the GOES satellites (I think) in the  
401-402 MHz range. I often see a small UHF crossed polarized Yagi  
antenna pointed up. They seem to be often located near rivers, streams  
and lakes monitoring water movement and levels.

Don't have a copy of the NTIA Redbook? Well head on over to hear and  
download it:

http://www.ntia.doc.gov/osmhome/redbook/redbook.html

Chris

  --
Chris Parris
Fed Files Columnist
Monitoring Times Magazine
chrisparris at monitoringtimes.com
http://www.monitoringtimes.com
http://mt-fedfiles.blogspot.com/