[wxqc] Optimum reporting times for APRS

[Dave Helms]

Hi Guys,

Jaggies will always be part of the analysis as long as people/networks 
contribute at different intervals and have uncorrected/uncalibrated 
data, regardless of the interval you happen to upload to CWOP. I don't 
think jaggies are a "bad" thing since they alert us to the likelihood of 
uncalibrated station(s) in the neigbhorhood. Once we know this, we can 
try and resolve the problem.

The strength of CWOP is its near real-time feed. We have suggested in 
the CWOP Guide that people with broadband Internet upload at 5 minute 
intervals as this period allows for detection flash flood rain events 
and for detection of "pulse" thunderstorms (indicated by a rapid 
pressure jump, strong winds, and heavy precip). 5 minute uploads also 
ensure the longest possible data latency is no more than 20 minutes (5 
minutes between APRS/FINDU uploads and 15 minutes between FINDU/MADIS 
data exchanges). Going to 30 minute uploads increases the maximum 
latency to 45 minutes and 1 hour uploads pushes the maximum latency to 
1:15 hour.

For people with dial-up like my ol' buddy Art, we will always take half 
a loaf over none at all and gladly welcome those station's data who 
upload their data at hourly rates or less as many times their stations 
are in the boonies and therefore a valuable contribution to the network.

Bottom line: As long as the APRS2 servers, FINDU, and your PC setup can 
take the load of 5 minute uploads, bring it on!

On the other hand... 5 minute uploads is also the maximum frequency we 
request from members because data higher rates stress the servers and 
have lessor meteorological value (weather only changes so fast, so why 
measure sensor "noise").


Hope this helps,

Dave
CW0351

Mark Wyman wrote:

> Hi Carol,
>
> I do 10 minute intervals since that is what peak gust reporting is on 
> I believe (I am a little vague in this point). In that fashion the 
> peak gusts are not missed between reporting intervals, but it isn’t so 
> much data that most of it is useless. 30 minutes is fine if you are on 
> dial-up because I am sure it is better than nothing.
>
> -Mark CW3833
>
> ------------------------------------------------------------------------
>
> *From:* wxqc-bounces at lists.gladstonefamily.net 
> [mailto:wxqc-bounces at lists.gladstonefamily.net] *On Behalf Of *Carol A 
> Locke
> *Sent:* Monday, March 06, 2006 12:44 PM
> *To:* wxqc at lists.gladstonefamily.net
> *Subject:* [wxqc] Optimum reporting times for APRS
>
> **Regarding the reporting times for MADIS and the jaggies, I report on 
> the half hour. What is best?**
>
> **CWOP4498.**
>
> **Thank you for your forum.**
>
> **Carol**
>
> **Carol A Locke**
>
> **SYSTEMS/MANAGEMENT INTEGRATION, INC.**
>
> **P O Box**** 50677**
>
> **Colorado Springs****, CO 80949**
>
> **Tel: 719 599-9197**
>
> **Fax: 719 599-9198**
>
> **email: CAL at sysmanint.com**
>
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