Where the Data Did Go…?
Dave Jesse on October 19, 2016

In my last two blogs I explained that we had identified a problem where small amounts of data were occasionally being lost with uQAR-equipped aircraft. After ten years of satisfactory operation, this was very puzzling. I also outlined how we built a test set using a Raspberry Pi computer and showed some sample test data. […]

Of Raspberries and Pies
Dave Jesse on October 13, 2016

In my previous post I explained that we were suffering data loss, and needed to be able to test the uQAR with various different recorder and data card combinations. This unusual post explains how we built a test rig and what we found. Introduction to the Raspberry Pi If you have come across the Raspberry […]

Where did the data go?
Dave Jesse on October 6, 2016

  Data going missing… Recently, our monitoring systems here at Flight Data Services identified that the number of flights processed was slightly down on the expected values, and although this was only a few per cent, it was enough to be concerning as we strive to reach 100% and many customers have data coverage as […]

Defying the Laws of Nature
Dave Jesse on September 26, 2016

One of the joys of these blogs is that I can repeatedly show that life is more complicated than you would first think. This blog post follows on naturally from the previous one, in which I clearly stated that you can’t measure something before it happens. No-one contacted me to protest at this bold statement, […]

Another Spectacular Data Error
Dave Jesse on September 6, 2016

  Another Spectacular Data Error   For those of you new to flight data, may I offer this week’s blog as a salutary lesson to always expect the unexpected. With only 39 years working with flight data I have never come across an error like this, and it just goes to show that there is […]

When is a Frame Not a Frame – The Sequel
Dave Jesse on August 31, 2016

When is a Frame Not a Frame – The Sequel So avid readers will remember the importance of superframe sequence numbering from my previous blog, and be wondering why this is such an issue. Surely you just number 16 superframes, and Bob’s your Uncle. Let’s take a simple example to start the blog going. Here […]

When is a Frame not a Frame?
Dave Jesse on August 23, 2016

Well, it’s a silly question but there is a point to it. In next week’s blog I am going to explain how superframes can go wrong, but first I need to explain subframes and superframes so that you, gentle reader, can understand what is going on. If you think you know all about frames and […]

When things go missing
Dave Jesse on August 4, 2016

There are sometimes when you just yearn for things to go smoothly, but as we have established in earlier blogs, life just isn’t that simple. Today we had a good case in point which illustrates some techniques we can use to get around practical problems with flight data. Helicopter Parameters One of the more challenging […]

Taking a Journey
Dave Jesse on July 6, 2016

Philosophically there are two ways to go from one place to another, from an origin to a destination. They are characterized by the saying attributed to Lao Tzu “The journey of a thousand miles begins with one step” and by Eddie Cochran’s hit “Three Steps to Heaven” (where would we be without Google and Wikipedia?). […]

Beware of Trolls – 2
Dave Jesse on June 17, 2016

Beware of Trolls – 2 Here’s an odd not really a blog, more a word of caution. I’ll return to data analysis next week (promise). Still, this week I ask you to watch a video for ten minutes. Back in 2013 I wrote a blog entitled “Beware of Trolls”. This was about patent infringement and […]

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