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--- meteorological_measurements [2023/12/11 11:45] – [Gust] river
+++ meteorological_measurements [2024/04/28 03:13] (current) – river
@@ Line 2: / Line 2: @@
 Terms and standards for automated weather station reports.
+===== Essential Climate Variables =====
+<blockquote>An Essential Climate Variable (ECV) is a physical, chemical or biological variable or a group of linked variables that critically contributes to the characterization of Earth’ s climate. GCOS currently specifies 55 ECVs.
+<cite>[[https://gcos.wmo.int/en/essential-climate-variables/about|ECV - About]]</cite>
+</blockquote>
+The interesting bit for me is the specifications of accuracy that are required for data to be useful for climatology. Measurements for weather forecasts are probably more helpful. I don't know if they are different.
 ===== Wind =====
+[[https://gcos.wmo.int/en/essential-climate-variables/surface-wind]]
 ==== Gust ====
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 Sparkfun wind instruments: https://www.sparkfun.com/products/15901
 USD. Wind direction seems to be detected by switches - not continuous.
+[[https://calypsoinstruments.com/shop/product/ultra-low-power-ultrasonic-wind-meter-ulp-std-6?category=2#attr=38,71,65|Calypso Ultrasonic (Wired, NMEA0183)]] - 475 EUR.