Hi, I’m newbie here, apologies if this is the wrong board. I’ve done a search for FAQs and existing threads, and can’t find anything - maybe my technique/terms are amiss as I’m sure this isn’t a first:
Tracking my little brother on BA193 (BAW, EGLL / LHR - KDFW) this morning on his first international flight, noticed the altitude drop from over 30,000ft to just under 4,000ft.
I was wondering if this was due to flying over very high ground or something similar, but through reading your FAQs I read the wiki page on it being a barometric altitude rather than sea level or ground level.
This led me to think that the data appeared this way due to the air pressure/weather, rather than an actual altitude change for the plane, but could someone please shed some light on my thoughts and possible causes? I’m intrigued by the science if you have the time please.
As you can see, the latitude and longitude seem out of sync with the general pattern, which I thought may mean it’s just a glitch in the matrix…