Webtags (preserving history): Difference between revisions

Webtags (preserving history) (view source)

Revision as of 16:57, 13 April 2015

901 bytes added , 16:57, 13 April 2015

m

→‎Davis: THSW expanded

Sfws

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@@ Line 1,757: / Line 1,757: @@
 |<#DavisTotalPacketsMissed>
 |Number of missed data packets
-|-
-|<#DavisNumberOfResynchs>
-|Number of times the console resynchronised with the transmitter
 |-
 |<#DavisMaxInARow>
@@ Line 1,766: / Line 1,763: @@
 |<#DavisNumCRCerrors>
 |Number of packets received with CRC errors
+|-
+|<#DavisFirmwareVersion>
+|The console firmware version
+|-
+|<#DavisNumberOfResynchs>
+|Number of times the console resynchronised with the transmitter
 |-
 |<#THWindex>
-|A derived temperature using Temperature/Humidity/Wind values
+|A derived temperature using Temperature/Humidity/Wind values.
+*The THW Index uses humidity and temperature (like Heat Index), but includes the cooling effects of wind (like wind chill).
+*Available from 1.9.2 Build 1009 (Aug 2011).
 |-
 |<#THSWindex>
-|A derived temperature using Temperature/Humidity/Solar/Wind values
+|A heat stress indicator using Temperature/Humidity/Solar/Wind values.
-|-
+*The THSW Index uses humidity and temperature (like the Heat Index), but also includes the heating effects of sunshine, and the cooling effects of wind.
-|<#DavisFirmwareVersion>
+*Therefore requires Davis station with solar sensor.
-|The console firmware version
+Approx calculation: Decrease heat index by 1 unit for each 1 mph increase in wind speed, and for each, either 3 Langley increase in solar radiation, or 10% increase in cloud cover.
+'''IMPORTANT NOTES:'''
+#Although this tag is available in Cumulus 1.9.x, there is an issue somewhere in the Davis code that prevents Cumulus 1 obtaining the value (so tag always displays zero).
+#Search the forum for several discussions about "THSW".
+#Cumulus MX reads "LOOP2" packets, and the correct value for this tag can be read there.
 |-
 |<#battery>