1. Horizontal visibility (vihh) separate codes for instrumental measurements (00 to 89, excluding 51-55) for visual observaties (90 to 99) as follows:
2. Total (NThh) and low (NLhh) cloud fraction is estimated visually by observers in units of 10ths of cloud cover coded from 0 to 10. The value 0 indicates no clouds or cloud covering less than 1/10 of the sky. The value 10 indicates that the sky is completely covered with clouds. 11 indicates that clouds cover the entire sky but with some insignificant sections of clear sky could be detectable.
3. The soil state of surface is coded as follows:
Description of the archive of upper-air data from radiosoundings, executed in GMO Tiksi since 2010 year
The archive of upper-air data presents veryfied values of air pressure, geopotential, temperature, dew point deficit, wind direction and speed at ground level, standard Isobaric surfaces, at the tropopause level, at the levels of singular points in temperature and humidity, the levels of singular points in the wind profiles and at the level of maximum wind; additionally there are presented values of pressure, wind direction and speed at the level of wind rotation of wind, data on wind shear, data about clouds.
Archive created with data coming in RIHMI - WDC in the operational mode via the communication channels according to WMO codes fm 35 temp (kN-04), fm 32 pilot (kN-03). The archive presents data of radiosoundings executed in 0 ana 12 UTC.