Lightning in XM weather

Someone asked a while back what the source was for the opinion that XM
shows only cloud to ground lightning.

This is explicitly stated in the XM manual that came with my new 396.

On 8/14/2007 11:08:09 AM, Paul kgyy wrote:

This is explicitly stated in the XM manual that came with my new 396.

That was me doing the asking, Paul. Thanks for that. Again, I was curious
from a comparison PoV between XM and WSI, which is the downlinked weather
service to which I currently subscribe.

--
Peter

Peter R. wrote:
On 8/14/2007 11:08:09 AM, Paul kgyy wrote:

This is explicitly stated in the XM manual that came with my new 396.

That was me doing the asking, Paul. Thanks for that. Again, I was
curious from a comparison PoV between XM and WSI, which is the
downlinked weather service to which I currently subscribe.

I certainly wouldn't do any equipment changes now since WSI is feeding via
the Sirius sat system & XM is via it's own system. Things are liable to
change one way or the other when they merge.

On 8/14/2007 2:19:49 PM, "Gig 601XL Builder" wrote:

I certainly wouldn't do any equipment changes now since WSI is feeding via
the Sirius sat system & XM is via it's own system. Things are liable to
change one way or the other when they merge.

I have no choice but to change equipment here shortly. Most if not all
installed WSI In Flight receivers are still pulling data from WSI's legacy
satellite network. AFAIK (typing as a customer with a focused interest in
this), WSI has yet to begin shipping their new Sirius satellite receivers to
which we must upgrade.

--
Peter

Peter R. wrote:
On 8/14/2007 2:19:49 PM, "Gig 601XL Builder" wrote:

I certainly wouldn't do any equipment changes now since WSI is
feeding via the Sirius sat system & XM is via it's own system.
Things are liable to change one way or the other when they merge.

I have no choice but to change equipment here shortly. Most if not all
installed WSI In Flight receivers are still pulling data from WSI's
legacy satellite network. AFAIK (typing as a customer with a focused
interest in this), WSI has yet to begin shipping their new Sirius
satellite receivers to which we must upgrade.

Ouch, I didn't realize they were requireing the change now. That would make
me nervous as hell. What is WSI saying about ther XM/Sirius merger?

On 8/14/2007 5:35:57 PM, "Gig 601XL Builder" wrote:

Ouch, I didn't realize they were requireing the change now.

Yep, required because the legacy system will be deactivated sometime early
2008. All customers must be over to the new receiver by that time.

That would
make me nervous as hell. What is WSI saying about ther XM/Sirius merger?

There are a few things about WSI InFlight that have incited my ire since I
have been a customer. Reverse engineering weather on the Garmin GNS430/530
that then resulted in Garmin abandoning WSI and leaving those of us with MX20
moving maps no longer supported starts the list. Frequent service outages and
this mandated upgrade round it out. When the service works it is excellent,
however.

Since XM and Sirius haven't officially merged yet (I think they are being
slowed/stopped by the US gov't, no?) I am confident that WSI will not muddy
the waters by mentioning any more constraints to their customers.


--
Peter

In article .com,
Paul kgyy wrote:

Someone asked a while back what the source was for the opinion that XM
shows only cloud to ground lightning.

This is explicitly stated in the XM manual that came with my new 396.

Most weather providers obtain lightning data from the National Lightning
Detection Network, which is operated by Vaisala. The network displays
cloud to ground strikes.

WSI uses data from their own lightning detection network, which can
detect both cloud to cloud and cloud to ground. I'm not sure what their
InFlight product displays.

In any case, both products pale in comparison to sferics devices for
in-flight lightning detection.


JKG

On Wed, 15 Aug 2007 12:03:41 -0400, Jonathan Goodish wrote:

The network displays
cloud to ground strikes.

How does it work that it can discern the difference?

- Andrew

"Jonathan Goodish" wrote in message
...
In article .com,
Paul kgyy wrote:

Someone asked a while back what the source was for the opinion that XM
shows only cloud to ground lightning.

This is explicitly stated in the XM manual that came with my new 396.

Most weather providers obtain lightning data from the National Lightning
Detection Network, which is operated by Vaisala. The network displays
cloud to ground strikes.

WSI uses data from their own lightning detection network, which can
detect both cloud to cloud and cloud to ground. I'm not sure what their
InFlight product displays.

In any case, both products pale in comparison to sferics devices for
in-flight lightning detection.

The engineer in me is dying to know how the sensors knows the difference
between cloud to ground and cloud to cloud. Anybody know.

Danny Deger
www.dannydeger.net




JKG

"Danny Deger" wrote in message ...

The engineer in me is dying to know how the sensors knows the difference between cloud to ground and cloud to cloud.
Anybody know.

Danny Deger
www.dannydeger.net



Polarity? Maybe something with the pulse shape?