[aprssig] Re: Balloon Altitude (was Clipped menus in Xastir andother ?'s)

Larry Cerney lcerney at viawest.net
Mon Dec 13 10:33:53 EST 2004

Hi Steve,

Maybe you could help me with a problem with your cgi script below.  We flew
a balloon yesterday with two APRS packages on it.  The first package,
AE0SS-11 reports correctly with the last=9999 as it hadn't been seen by
FindU until yesterday.  My package, K0ANI-11, I had tested in my yard 30
feet away from my I-gate antenna and so FindU has a good base of altitude
data.  When I use the cgi below with last=9999 it works fine.  When I try to
change it to last=24 or last=0024 I get an error message.
"The image "http://www.findu.com/cgi-bin/altitude.cgi?call-k0ani-11&last=24"
cannot be displayed, because it contains errors."

I just tested a few last='s and found that it does work starting at
last=1400.  Strangely, with last=1390 it only shows the downward slope.

I'm assuming the last= refers to hours, not minutes.  I that correct?

This cgi is a great tool for us balloonatics.

Thanks for everything you do...


"The only reason for time is so that everything doesn't happen at once." 
--Albert Einstein 
-----Original Message-----
From: aprssig-bounces at lists.tapr.org [mailto:aprssig-bounces at lists.tapr.org]
On Behalf Of Steve Dimse
Sent: Monday, December 13, 2004 1:51 AM
To: TAPR APRS Mailing List
Subject: Re: [aprssig] Re: Balloon Altitude (was Clipped menus in Xastir
andother ?'s)

On 12/13/04 at 2:18 AM M. Schneider <msokla at brightok.net> sent:

>Cool feature, Steve!  Is this going to be available for any balloon launch,
>or was it just a one-time thing?  

No, its available for everyone, not just balloons. For example, his URL
shows my
altitude profile through my 6 week trip out west:


i still need to work on improving the time labeling, but this cgi will hang

>I've got some friends who launch balloons
>here in Oklahoma who'd like to see this as a regular feature.  Also, does
>need anything running on their computer (such as QuickTime) to see the
>chart?  I'm getting the impression from their emails to me that they are
>having problems seeing the graph.  Shows up fine on my computer, though.

The cgi produces a PNG, which all current browsers handle correctly. Some
browsers do not handle direct png graphics, this is addressed as the last
in my FAQ. If people aren't seeing it, grabbing a current copy of any
will fix that...

Steve K4HG

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