Sokol-M1: Difference between revisions
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== '''<big> | == '''<big>Principle of operation of sensors and metrological characteristics of Sokol-M1</big>''' == | ||
'''<u> | '''<u>The operating principle</u>''' of sensors for various measuring channels of stations is shown in '''Table 2.''' | ||
''' | '''Table 2''' – Principle of operation of the '''SOKOL-M1''' weather station sensors | ||
{| class="wikitable" | {| class="wikitable" | ||
|''' | |'''Measured parameter''' | ||
|''' | |'''Principle of operation''' | ||
|- | |- | ||
|''' | |'''Air temperature''' | ||
| | |Based on the change in the conductivity of the sensitive element depending on the ambient temperature | ||
|- | |- | ||
|''' | |'''Relative air humidity''' | ||
| | |Based on the change in the conductivity of the sensitive element depending on the air humidity | ||
|- | |- | ||
|''' | |'''Wind speed''' | ||
| | |Based on the conversion of the airflow speed into the rotational motion of the shaft with а set of cups that is detected and measured by means of the Hall sensor | ||
|- | |- | ||
|''' | |'''Wind/Airflow direction''' | ||
| | |Based on the conversion of the wind vane's angle of rotation into an electrical signal using а magnetic rotation angle recorder (encoder) | ||
|- | |- | ||
|''' | |'''Atmospheric pressure''' | ||
| | |Based on the piezo-resistive effect: а change in the membrane’s resistance when it deforms under atmospheric pressure is registered and recorded | ||
|- | |- | ||
|''' | |'''Amount of precipitation''' | ||
| | |Based on the measurement of the precipitation/rainfall intensity (the total of the mm of rainfall per day | ||
|- | |- | ||
|''' | |'''Rainfall intensity''' | ||
| | |The intensity of rainfall is measured based on the number of tilts of a tray mechanism (small container) with one tilt being equal to 0.29 mm; the counter is reset every time the Station is polled via ModBUS or transmits its data to a server via GSM. | ||
|- | |- | ||
|''' | |'''Ultraviolet level of solar radiation''' | ||
| | |Based on the occurrence of current through the p-n transition under the influence of ultraviolet radiation on the photodiode | ||
|- | |- | ||
|''' | |'''Level of the visible solar radiation spectrum''' | ||
| | |Based on the occurrence of current through the p-n transition under the influence of visible radiation spectrum on the photodiode | ||
|} | |} | ||
'''The SOKOL-M1''' automatic meteorological station measures '''<u>meteorological parameters</u>''' in accordance with '''Table 1.''' | |||
''' | '''Table 1''' – Metrological characteristics of '''SOKOL-M1''': | ||
{| class="wikitable" | {| class="wikitable" | ||
|''' | |'''Name of characteristic''' | ||
|''' | |'''Measurement range/measurement tolerance limits''' | ||
|''' | |'''Characteristic value''' | ||
|- | |- | ||
| rowspan="2" |''' | | rowspan="2" |'''Atmospheric pressure''' | ||
| | |Range of measurements of atmospheric pressure, hPa | ||
| | |from 540 to 1100 | ||
|- | |- | ||
| | |Absolute permissible error limits of atmospheric pressure measurement, hPa | ||
|±0,5 | |±0,5 | ||
|- | |- | ||
| rowspan="2" |''' | | rowspan="2" |'''Air temperature''' | ||
| | |Range of measurements of air temperature, <sup>o</sup>C | ||
| | |from -60 to +55 | ||
|- | |- | ||
| | |Limits of allowed absolute measurement error of air temperature, °C: | ||
- | - range: -30…55 inclusive | ||
- range: -60…-30 inclusive | |||
|±0,4 | |±0,4 | ||
±0,5 | ±0,5 | ||
|- | |- | ||
| rowspan="2" |''' | | rowspan="2" |'''Relative air humidity''' | ||
| | |Range of relative humidity measurement, % | ||
| | |from 1 to 100 | ||
|- | |- | ||
| | |Absolute permissible error limits of air humidity measurements, % | ||
|±5 | |±5 | ||
|- | |- | ||
| rowspan="2" |''' | | rowspan="2" |'''Soil temperature (if additional equipment is used)''' | ||
| | |Range of measurements of soil temperature, ° C: | ||
| | |from -60 to +70 | ||
|- | |- | ||
| | |Limits of allowed absolute error of soil temperature measurements, °C: | ||
- | - range: -30…50 inclusive | ||
- range: -60…-30 and 50…70 inclusive | |||
|±0,2 | |±0,2 | ||
±0,4 | ±0,4 | ||
|- | |- | ||
| rowspan="2" |''' | | rowspan="2" |'''Water temperature (if additional''' | ||
| | '''equipment is used)''' | ||
| | |Range of measurements of water temperature, ° C: | ||
|from -10 to +65 | |||
|- | |- | ||
| | |Limits of allowed absolute error of measurement of water temperature, °C | ||
|±0,2 | |±0,2 | ||
|- | |- | ||
| rowspan="2" |''' | | rowspan="2" |'''Rainfall volume''' | ||
| | |Precipitation measurement range, mm | ||
| | |from 0,2 | ||
|- | |- | ||
| | |Limits of permissible relative error of atmospheric precipitation measurements, % | ||
|±(0,2 + 0,05∙Х*) | |±(0,2 + 0,05∙Х*) | ||
|- | |- | ||
| rowspan="2" |''' | | rowspan="2" |'''Rainfall intensity''' | ||
| | |Rainfall intensity measurement range, mm/h | ||
| | |from 0 to 120 | ||
|- | |- | ||
| | |Limits of permissible absolute error of atmospheric precipitation intensity measurements, mm | ||
|±(0,2+0,05∙I*) | |±(0,2+0,05∙I*) | ||
|- | |- | ||
| rowspan="2" |''' | | rowspan="2" |'''Wind speed''' | ||
| | |Range of measurement of air flow rate, m/s | ||
| | |from 1 to 60 | ||
|- | |- | ||
| | |Limits of permissible relative wind speed measurement error, m/s | ||
- range: 1 … 5 m / s inclusive; | |||
- range: 5 … 60 m / s | |||
|±0,5 | |±0,5 | ||
±(0,5 + 0,05∙V*) | ±(0,5 + 0,05∙V*) | ||
|- | |- | ||
| rowspan="2" |''' | | rowspan="2" |'''Wind direction''' | ||
| | |Measurement range of airflow direction | ||
| | |from 0˚ to 360˚ | ||
|- | |- | ||
| | |Absolute permissible error limits of wind direction | ||
|±3˚ | |±3˚ | ||
|- | |- | ||
| colspan="3" |'' | | colspan="3" |''Notes'' | ||
1) X* – | 1) X* – measured value of atmospheric precipitation, mm. 2) I* – measured value of atmospheric precipitation intensity, mm/min. 3) V* – measured air flow velocity, m/s. | ||
|} | |} | ||