[image: Seasons' Current Conditions (Parenthetical).PNG] Under Current Conditions in the Seasons skin, the Barometer value is appended with a parenthetical value; e.g., 1024.3 hPa(-0.1)
1) What is the meaning of the appended parenthetical value? In all truthfulness, I've only now have just taken note of it as I prepare to make a calibration adjustment on the display console (Ambient Weather WS-2000), my first such adjustment since enlisting weewx. My guess is that it shows the change in pressure when compared to the previous report; e.g., 5 minutes ago. 2) The related question to this pertains to the first value; e.g., 1024.3 hPa, should it be exactly identical with the value shown on the display console when the pressure is steady through multiple update intervals? I've read <http://weewx.com/docs/usersguide.htm#pressure_calibration> that weewx receives 'pressure' from FineOffset hardware and then calculates 'barometer' values. This brings up two more questions. 3) What is the formula that is being used and to how many places to the right of the decimal is this formula applied? 4) Loop packets suggest that 'pressure' is being reported by the hardware in units of inHg to 2 significant digits, is this a false assumption? and how might it be proven? pi@raspberrypi:/etc/weewx $ sudo /etc/init.d/weewx stop [ ok ] Stopping weewx (via systemctl): weewx.service. pi@raspberrypi:/etc/weewx $ sudo weewxd weewx.conf LOOP: 2019-04-28 10:51:20 EDT (1556463080) altimeter: 29.8717169546, appTemp: 42.072810622, barometer: 29.8843336142, cloudbase: 3250.42822233, dateTime: 1556463080, dewpoint: 33.8944955053, heatindex: 47.5, humidex: 47.5, inDewpoint: 41.4872761332, inHumidity: 39, inTemp: 67.3, maxSolarRad: 815.85703395, outHumidity: 59, outTemp: 47.5, pressure: 29.71, radiation: 881.07, rain: 0.0, rainRate: 0, usUnits: 1, UV: 8, windchill: 46.1399181728, windDir: 290, windGust: 4.5, windSpeed: 3.8 LOOP: 2019-04-28 10:51:36 EDT (1556463096) altimeter: 29.8717169546, appTemp: 42.2517904021, barometer: 29.8843336142, cloudbase: 3154.86029954, dateTime: 1556463096, dewpoint: 34.3149943656, heatindex: 47.5, humidex: 47.5, inDewpoint: 41.4872761332, inHumidity: 39, inTemp: 67.3, maxSolarRad: 816.299633379, outHumidity: 60, outTemp: 47.5, pressure: 29.71, radiation: 878.37, rain: 0.0, rainRate: 0, usUnits: 1, UV: 8, windchill: 46.3046187182, windDir: 307, windGust: 4.5, windSpeed: 3.6 LOOP: 2019-04-28 10:51:52 EDT (1556463112) altimeter: 29.8717169546, appTemp: 41.6321945021, barometer: 29.8843336142, cloudbase: 3154.86029954, dateTime: 1556463112, dewpoint: 34.3149943656, heatindex: 47.5, humidex: 47.5, inDewpoint: 41.4872761332, inHumidity: 39, inTemp: 67.3, maxSolarRad: 816.741118563, outHumidity: 60, outTemp: 47.5, pressure: 29.71, radiation: 877.51, rain: 0.0, rainRate: 0, usUnits: 1, UV: 8, windchill: 45.478419953, windDir: 312, windGust: 5.8, windSpeed: 4.7 LOOP: 2019-04-28 10:52:08 EDT (1556463128) altimeter: 29.8717169546, appTemp: 42.6460787021, barometer: 29.8843336142, cloudbase: 3154.86029954, dateTime: 1556463128, dewpoint: 34.3149943656, heatindex: 47.5, humidex: 47.5, inDewpoint: 41.4872761332, inHumidity: 39, inTemp: 67.3, maxSolarRad: 817.181491045, outHumidity: 60, outTemp: 47.5, pressure: 29.71, radiation: 874.46, rain: 0.0, rainRate: 0, usUnits: 1, UV: 8, windchill: 47.5, windDir: 291, windGust: 4.5, windSpeed: 2.9 LOOP: 2019-04-28 10:52:24 EDT (1556463144) altimeter: 29.8717169546, appTemp: 40.9662707821, barometer: 29.8843336142, cloudbase: 3060.68950083, dateTime: 1556463144, dewpoint: 34.7293458799, heatindex: 47.5, humidex: 47.5, inDewpoint: 41.4872761332, inHumidity: 39, inTemp: 67.3, maxSolarRad: 817.620605418, outHumidity: 61, outTemp: 47.5, pressure: 29.71, radiation: 874.46, rain: 0.0, rainRate: 0, usUnits: 1, UV: 8, windchill: 44.6901761734, windDir: 310, windGust: 9.2, windSpeed: 6.0 LOOP: 2019-04-28 10:52:40 EDT (1556463160) altimeter: 29.8717169546, appTemp: 39.4917723021, barometer: 29.8843336142, cloudbase: 3154.86029954, dateTime: 1556463160, dewpoint: 34.3149943656, heatindex: 47.5, humidex: 47.5, inDewpoint: 41.4872761332, inHumidity: 39, inTemp: 67.3, maxSolarRad: 818.058803625, outHumidity: 60, outTemp: 47.5, pressure: 29.71, radiation: 874.46, rain: 0.0, rainRate: 0, usUnits: 1, UV: 8, windchill: 43.5112234785, windDir: 308, windGust: 11.4, windSpeed: 8.5 LOOP: 2019-04-28 10:52:56 EDT (1556463176) altimeter: 29.8817634304, appTemp: 40.8999448021, barometer: 29.8943922927, cloudbase: 3154.86029954, dateTime: 1556463176, dewpoint: 34.3149943656, heatindex: 47.5, humidex: 47.5, inDewpoint: 41.665600342, inHumidity: 39, inTemp: 67.5, maxSolarRad: 818.495940296, outHumidity: 60, outTemp: 47.5, pressure: 29.72, radiation: 874.09, rain: 0.0, rainRate: 0, usUnits: 1, UV: 8, windchill: 44.6901761734, windDir: 257, windGust: 6.9, windSpeed: 6.0 Thank you very much for any reply. Kind regards, Kelly -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
