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Ambient Weather and Ecowitt and other Fine Offset clones / Re: Will the real pressure please stand up?
« Last post by CW2274 on Today at 07:53:51 PM »I guess the point I was making (or trying to make) is the term “sea level pressure” applies to both Altimeter setting and SLP. SLP is called sea level pressure (Aviation Weather Center) - that's what S-L-P stands for, but Altimeter is also “sea level pressure.” In other words, both are converted down to sea level.I get what's trying to be conveyed. Problem is, they're not the same. I think a lack of further explanation here (by whomever) has some people thinking that they actually are. For instance, my altimeter right now 29.82, but my SLP is 29.62. Quite the difference.
I think the aviation industry got it right; QNH = QNH and QFF = QFF. No confusion there and no head scratching about sea level pressure, barometric pressure, etc, etc.
Aviation had to get it right. It's used for vertical separation from other aircraft and terrain below 18,000' (FL180).