== Weather station ==

 * [[https://docs.google.com/spreadsheets/d/1xISFWRnT9Y2N-bxVqAFHlwZMDI-AxOJUF_S3deEMjW8/edit#gid=885258318|Installed weather station]]

Acording to [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9269|JGW-T1809269]], calibration factor from output voltage to each unit is given with
{{{
temp = ( Vout/78/0.001-100)/0.388  [deg_c]
humd = (Vout/2)/5*100 [%]
pressure = (Vout/2)/5*300 + 800 [hPa]
}}}
Then, "_GAIN" and "_OFFSET" parameters in cds filter of each channels are calculated by above equation with count value not voltage,
||<#F0F0FF> Name ||<#F0F0FF> Value ||<#F0F0FF> Unit ||
|| _TEMP_OFFSET || -1.278e4|| count ||
|| _HUMD_OFFSET || 0.0|| count ||
|| _PRES_OFFSET || 4.369e4 || count ||
|| _TEMP_GAIN || 2.017e-2|| deg_c/count||
|| _HUMD_GAIN || 6.104e-3|| %/count ||
|| _PRES_GAIN || 1.831e-2 || hPa/count ||
,where ransformation coefficient from voltage to adc count is given with c2V = 2.0 * 10/2**15 [V/count], because output signal from sensor is measured with single-end not differential.
These parameters are '''managed by SDF with observe.snap. So, plase do not change this file.