[CVCC_Members] Fwd: Propagation Links - Planning for Field Day

[K3WRY at aol.com]

Here are several sources of information that are applicable to field day  
operating conditions which have been complied from my research of information 
 sources. Some are helpful and some are just interesting.
 
73's
Dr Joseph Palsa k3wry
ARRL-Virginia Section  Manager
Virginia State Government  Liaison
K3WRY at ARRL.ORG
804-350-2665

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No trees were destroyed in the sending of this message,  however, a 
significant number of electrons were terribly inconvenienced "You are  what you do, 
When it counts"

"When the disaster is at its worst,  communications should be at its best"
 

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First check for  lightning areas. It also can give you  an idea of weather 
in your target area. It might not be worth turning on the  radio – or time 
to disconnect antennas. 
 
3 hour VA forecast http://www.nws.noaa.gov/mdl/radar/NE_probltg.gif
3 hr  USA forecast http://www.nws.noaa.gov/mdl/radar/smv_03h_probltg.gif 
 
Current and past  lightning. Drill down to North America and VA. Turn on 
the buttons  <strikes>, <detectors> & <sound>. 
http://en.blitzortung.org/live_lightning_maps.php 
 
You can get a quick  snapshot of band conditions here. 
http://www.hamqsl.com/solarn0nbh.php?image=random
 MUF contours.  Sometimes shows TEP or solar flare lines too. 
http://www.spacew.com/www/realtime.gif
 This shows D-region  absorption and bands that are bad.  
http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap 
PropNET  is an automatically controlled digital communication network. 
USA  http://propnet.org/catch3.php?band=&last=1&call=&center=US
Select other areas or  bands here 

http://propnet.org/index3rp.shtml  
http://www.dxmaps.com/spots/map.php?Lan=E&Frec=ALH&ML=M&Map=W2LN&DXC=N&HF=S&
GL=S 
10 meter  map http://n3tuq.com/10meterdxmap.php 
Here  are VOCAP propagation prediction tools. Pick a Tx & Rx site here.  
Example from QTH W-zone Richmond, VA. Then  drag blue icon on map to Rx site – 
or enter in <<select a  location>> Note you can pick antenna  types and 
power. Colored clock display shows  best time / band. If you <run prediction> 
it brings up a freq-time  reliability graph with MUF. Wait while the 
calculation is run. 
http://www.voacap.com/prediction.html
Put in  your Tx info here and get signal strength map. Wait. Sometimes you 
can see skip  zones. Try different power levels, modes and antennas. 
http://www.voacap.com/coverage.html  
 
= = =  BELOW FOR VHF / UHF = = = 
 
Monitor the real-time 2m VHF  propagation here: 
http://aprs.mountainlake.k12.mn.us/
It uses APRS repeater interchanges  during the last hour. Map is updated 
several times per minute. Drag and Zoom ( Ctrl+ Ctrl- ) for better info. Hover 
in a colored blob  to see call signs. Click in a colored blob and see the 
paths. Click on a call  sign to get a table of details (expect some delay).  
Light yellows are no big deal; it just  means the band is normal to slightly 
above normal. Orange or bright orange  paths indicates enhancement.    If 
you ever see a red  swatch, it means things are really cooking.  You see this 
down near the  Gulf Coast far more often than you do up here.   If you see 
sort of a  focused, narrow red path spanning several states that sometimes 
means the 144  band is having a sporadic E-skip opening or tropo ducting. If 
you slide the map  over to Europe and zoom, you can see openings there too. 
If 2m is hot both  places, then look for 6m openings on other sites. 
 2m map   http://n3tuq.com/2meterdxmap.php 
 6m  map http://n3tuq.com/dxmap.php
 

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