On the low-bands, ionospheric absorption is a limiting factor. The
application PropView uses the IONCAP engine to generate predictions,
plotting both the MUF-based limits on refraction as well as absorption
effects to show you what bands are likely to be open between your QTH
and a specified location over a 24 hour period. PropView is free, and
available via www.qsl.net/propview .
PropView is a member of the DXLab Suite, a free set of applications that
can work independently, but sense each other's presence and interoperate
automatically. For example, running PropView and DXView simultaneously
means that clicking on a location on DXView's World Map will
automatically set the "destination" location in PropView, allowing you
to generate a forecast with a single mouse click. Similarly,
SpotCollector automatically forwards current solar flux readings to
PropView, eliminating the need for manual entry of that parameter.
While it won't help you on the low bands, PropView has the ability to
monitor the IARU/NCDXV HF beacon network, assembling schedules based on
band, location, or bearing. If Commander (the DXLab transceiver control
application) is running, PropView will QSY your transceiver as required
to monitor each beacon in the schedule; if DXView is running, the beacon
being currently monitored will be highlighted on the world map, and
(optionally) your beam will be rotated to the correct bearing. All
DXLab applications are free, and available via www.qsl.net/dxlab .
73,
Dave, AA6YQ
-----Original Message-----
From: propagation-bounces@contesting.com
[mailto:propagation-bounces@contesting.com] On Behalf Of Jeff Maass
Sent: Sunday, September 26, 2004 15:35
To: NW7US, Tomas; propagation
Subject: RE: [Propagation] Critical vs. Maximum Usable Frequency map
Tomas:
How does the MUF map predict availablity of a DX path
for 80 Meter QSOs (which was the original question),
or for 160 Meters?
Are there better tools available for realtime display
of current conditions for 160/80 DX paths?
73,
Jeff Maass K8ND
> -----Original Message-----
> From: propagation-bounces@contesting.com
> [mailto:propagation-bounces@contesting.com]On Behalf Of NW7US, Tomas
> Sent: Sunday, September 26, 2004 3:23 PM
> To: propagation
> Subject: [Propagation] Critical vs. Maximum Usable Frequency map
>
>
> On Sun, 26 Sep 2004 06:09:16 -0000, David Ackrill
> <dave.g0dja@tiscali.co.uk> wrote:
>
> > If you want the local F2 Critical frequency (the one where signals
> > go almost straight up and down, try looking at this map.
> > http://www.spacew.com/www/fof2.html
>
> Excellent map for this.
>
> Also of interest are the "live" (using real measurements) HAP maps
> from
> IPS:
>
> North America HAP maps:
> http://www.ips.gov.au/Main.php?CatID=6&SecID=4&SecName=North%20America
> &SubSecID=
> 1&SubSecName=HAP%20Charts
>
> North America Ionospheric map:
> http://www.ips.gov.au/Main.php?CatID=6&SecID=4&SecName=North%20America
> &SubSecID=
> 3&SubSecName=Ionospheric%20Map
>
> The best jump off point for IPS HF-related data is:
> http://www.ips.gov.au/Main.php?CatID=6
>
> These HAP maps are "Hourly Area Predictions" of communication
> frequencies based on current observed conditions in the North America
> ionosphere. Because of the variability of the ionosphere this type of
> prediction can only be made for the current hour.
>
> For paths that are more typical of "DX" (3000 km paths), there is also
> this map:
>
> http://www.spacew.com/www/realtime.html
>
> 73 de Tomas, NW7US (AARØJA/AAAØWA)
>
> : Propagation Editor for CQ, CQ VHF, and Popular Communications :
> : Quarterly Propagation Columnist for Monitoring Times Magazine :
> : Creator of live propagation center - http://prop.hfradio.org/ :
> : Member, US Army Miltary Affiliate Radio Service (MARS) AARØJA :
> : 122.93W 47.67N / Brinnon, Washington USA - CN87 - CW/SSB/DIGI :
> : Website, software, database design - http://newwebmakers.com/ :
> : Washington State Army MARS, State Army MARS Director - AAAØWA :
> : 1Øx56526, FISTS 7Ø55, FISTS NW 57, AR Lighthouse Society 144 :
> _______________________________________________
> Propagation mailing list
> Propagation@contesting.com
> http://lists.contesting.com/mailman/listinfo/propagation
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