Looking for Ridge Lift/Turbulence Diagram

"Jack Glendening" wrote in message
ink.net...
Tim Shea wrote:
The drawing at the flymorninggside site looks funny to me. Are you SURE
that
is accurate? It looks like ridge lift, not standing mountain wave. The
wave
sets up *after* the mountain range, not above and in front as depicted
in
the wave.htm link.
The best diagram I've seen was made by Dan Gudgel (works for the
National
Weather Service in Hanford, CA). ***DELETED*** he may be able to
e-mail it.
Tim

Tim,

The morningside diagram _is_ misleading - lift does occur upwind of the
ridge but it is normal "ridge" lift and disconnected from the wave flow.
I will contact Dan Gudgel since I know him, thanks for the lead. BTW
it's a bad idea to include an email address in a RAS posting unless it
is first altered or "munged" to prevent it's being harvested by spammers.

Jack

Both the wave and ridge diagrams are poorly drawn conceptually, surely there
are better examples.

munging happens on the right side of the @ only

altering the left side may only create an alias

if you have an effective and powerful spam filter, neither matters, and once
_everyone_ has one, the spammers are dead. choose your ISP wisely

Frank Whiteley
posting in the clear from the same e-mail for 7 years;^), blackholing 10,000
spams/month at the user-configurable server pre-filter. FWIW, most ISPs are
seeing about 80% SPAM, in terms of volume, on mail servers.

Better

"Charles Petersen" wrote in message
...
Check out the animated graphics at
http://www.yorksoaring.com/whatissoaring.html. You may have to click
along
several pages to get to the ridge lift page.

Charles Petersen, grateful user of Dr. Jack's Blip Maps

"DrJack" wrote in message
...
I'm giving a (paid!) talk Saturday on soaring and soaring meteorology
to a group of power-rated pilots as part of a continuing education
aviation seminar. I have not been able to find a diagram which
depicts flow over a ridge showing both the lift on the upwind side and
the turbulence/sink on the downwind side and hope someone here might
know of one, particularly if available on the internet so I can get a
copy.

--
Dr. John W. (Jack) Glendening Meteorologist

which?

"Jack Glendening" wrote in message
link.net...
My thanks to all who responded. I am going to use two of the diagrams,
one to illustrate soaring lift over a ridge and another to illustrate
dangers to aircraft downstream of a ridge.

"F.L. Whiteley" wrote:
...
if you have an effective and powerful spam filter, neither matters, and once
_everyone_ has one, the spammers are dead. choose your ISP wisely
...

There is no difference for the spammers if you receive the spam and don't
read it or if some filter avoid that you even see it. As almost everyone
who has no filter is in the first case, why should it change anything if
they go in the second case? As long as the spammers would believe that there
is a 1/1000000 chance that their spam is read, they will try to send 1000000000000
spam (approximatively :-), this is the basic principle of spam. The only
correct solution is that their providers block the spam at its source,
but all this waste of bandwith is source of income for the providers,
so there is little chance that they will do anything to cut it. And we all
pay for it.

F.L. Whiteley wrote:
which?

"Jack Glendening" wrote in message
link.net...

My thanks to all who responded. I am going to use two of the diagrams,
one to illustrate soaring lift over a ridge and another to illustrate
dangers to aircraft downstream of a ridge.



One that Peter Deane sent to me outside RAS and one that I altered heavily
from the French version http://www.drjack.net/TEMP/ridgeflow.png

But I should add that I also grabbed some of the other images that
looked better than the ones I had, such as some from York Soaring

"Robert Ehrlich" wrote in message
...
"F.L. Whiteley" wrote:
...
if you have an effective and powerful spam filter, neither matters, and
once
_everyone_ has one, the spammers are dead. choose your ISP wisely
...

There is no difference for the spammers if you receive the spam and don't
read it or if some filter avoid that you even see it. As almost everyone
who has no filter is in the first case, why should it change anything if
they go in the second case? As long as the spammers would believe that
there
is a 1/1000000 chance that their spam is read, they will try to send
1000000000000
spam (approximatively :-), this is the basic principle of spam. The only
correct solution is that their providers block the spam at its source,
but all this waste of bandwith is source of income for the providers,
so there is little chance that they will do anything to cut it. And we all
pay for it.
When it costs more to send than they receive they will stop, and that will
be sometime well before 1/1000000 ratio is reached. Either method will
work, eventually. By filtering at the gateway, we do save performance on
the mail servers and the user pipes. It also stops mail viruses, so I shed
a few hundreds of those each month, especially recently the Gibe.C which
seems to be heavily propagated among aviation enthusiasts.

Frank Whiteley

F.L. Whiteley wrote:
blackholing 10,000 spams/month at the user-configurable server pre-filter

If you are getting and ignoring over 3000 emails per _day_ I can't see
that you can know that none of those are legitimate email. I don't know
of any perfect spam filter and the black hole lists are also not perfect
as there are documented cases of innocent IPs being "collateral damage"
of over-zealous listings.

With a thick English accent:

Q: What's for breakfast?

A: Spam Spam Spam Spam Spam Spam Spam Spam Beans and Spam.

But I don't like Spam!

We also have Beans Beans Beans Spam and Beans.

I DON'T LIKE SPAM!

"Jack Glendening" wrote in message
hlink.net...
F.L. Whiteley wrote:
blackholing 10,000 spams/month at the user-configurable server
pre-filter

If you are getting and ignoring over 3000 emails per _day_ I can't see
that you can know that none of those are legitimate email. I don't know
of any perfect spam filter and the black hole lists are also not perfect
as there are documented cases of innocent IPs being "collateral damage"
of over-zealous listings.

340/day. Not ignored, but a quick scan suffices.

Please visit www.mailarmory.com and look over the website, including the
tools. It's a combo of fuzzy logic, RBL's,

Also www.greeleynet.com/mailarmory/mailarmory.ppt for a user view.

Sorry the PP presentation is a devoid of comments, that was an audible at
our monthly users group meeting. Briefly,

1. It's user configurable. You can view what is filtered and choose to add
it to your accept list, reject list, or ignore it. The accept and reject
lists also allow wildcards, like *drjack.net, which would allow anything
from that domain through, list or whatever. Customer education is important
and it does take some time daily to tweak settings. I check in and purge
the AM and PM and again when demonstrating to new clients.

2. I currently run my account at aggression 2. Two points and it's
filtered. The captured mail can be sorted by any column and there is also a
search tool. Personally I recommend sorting by Type, that is, the 'weight'
given any particular message. The lower the weight, the less likely to be
spam. Since the mailarmory engine 'learns', there is the possibility of
weights being a little odd after a major engine upgrade as we did for the
first time this past July. That was the first time I'd seen legitimate
e-mail gaining 8 points and it only happened over a period of 3-4 days while
the engine 're-educated' itself to mail patterns so that no legitimate
e-mail gets 8 points again. No legitimate e-mail got over 8 points during
this short period. If you notice, you can optionally Autotrash e-mail 8
points and above. Trust me, most Viagra and Porn gets at least 8 points and
often over 10. The virus filtering is as effective as any installed. We
still recommend an client anti-virus since cracked web sites can still
download trojans and malicious scripts that may can download dangerous code.

3. The claim that it can be 99.7 effective is not spurious, but it is an
interactive tool and requires the user to pay some attention. Mailarmory
resides on a Sonet pipe that can lit to meet subscriber needs. It operates
across multiple servers, n-expandable to accomodate business, corporate, and
ISP mail servers. An Incredimail message forwarded by an AOL or Hotmail
user may come in at 6 or 7, but the bulk of these are forwarded noise. Mail
may reside in the captured area for 4 hours to 14 days, by user discretion.
I have about 120 entries in my accept list and 6 in my reject list after 18
months. I've been posting to the USENET from this e-mail address since
1996. The biggest increase in SPAM followed expiration of our MAPS RBL
subscription in August 2002 accompanied by the release of Mailarmory to all
customers.

4. Yeah, it's been DDOS'd. Results in some queuing, but no loss. Stood up
a lot better than the RBL sites that were thrashed.

Frank Whiteley
fuzzy logic, RBL databases, carries a price, and takes a chunk of processing
power