| reply to Spice300
Re: FAP Flap Follow-up 
WB FAP Meter Compared to Actual Usage
Green curve = rolling monthly download usage derived from netstat (actual usage)
Red curve = Wildblue FAP meter as read by Fapzilla
FAPPeriod = 29.79 days
delay = 30 minutes
Adjustment: the usage during the flat line at the end of June is removed from the green curve.
From June 1 to June 6 my WB FAP meter updated about twice per day.e
From June 6 to June 22 my WB FAP meter updated more rapidly than once every 30 minutes which is the fastest rate observed to date. This short delay began after my WB FAP meter was restored after the reset on June 26.
Linear Error
This is a plot of the data between July 6 and July 23 showing the linear relationship of the error between my actual usage and my WB FAP meter. Covering a range of more than 25% of my FAP threshold the error retains a linear relationship rather accurately. The pairs of approximately vertical dots extending from 5700 to 6500 on the x-axis correspond to the big decrease around July 14. The variations are caused by my sampling interval of 30 minutes being different than the actual update interval of my WB FAP meter and provide a measure of the accuracy of the data. The vertical dots at x-ordinate 5350 are caused by my WB FAP meter returning to twice daily updates starting July 23 GMT. I have omitted the data from July 1 to July 6 to reduce the error that twice daily updates introduce.
The line's slope of .923 corresponds to WB's FAP meter overstating my usage uniformly by about 8.3%. This could be caused by the "satellite wrapper" (a phrase coined by News). I interpret the intercept of -125 as the error introduced by canceling page loads and understatements of my netstat meter due to WIN XP locking up & shutting off my computer. 125 MB is about right for those errors. The intercept varies considerably when I add more data to the graph.
Here is proof that Wildblue's FAP meter consistently overstates usage relative to netstat without proving why.
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Value Pack, beam 31, Riverside gateway |
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 dbirdmanPremium,MVM
join:2003-07-07
Eureka, CA
kudos:4 | What do you think the odds are that WB uses "Millions of Bytes" when they quote MB? We are pretty sure that Hughes does that with their FAP, just as disk drive manufacturers usually do. That introduces a 5% overage, since an MB standard is 1048576 Bytes.
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W2K Server|Toshiba Satellite XP Pro|HughesNet IA8/1410/7000 2-watt Business Internet on .98 meter fixed | Datastorm .98 XF2 2-watt on 1990 Blue Bird Wanderlodge "Blue Thunder" 22 tons of rolling steel! |
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 BasilAR WildBlue
join:2006-07-20
Parks, AR | You mean 1MB of allowed FAP is 1,000,000 bytes and
1MB of usage is 1,048,576 bytes? 
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Beam 35 - value |
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