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M.O. Gangtok
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Basic Information: Meteorological Data at 03,06,09 and 12 UTC and also upper air data through pilot balloon observation manually at 01/ 02 and 11/12 UTC daily. Thermometers namely Maximum, Minimum, Dry Bulb & Wet Bulb thermometers are kept inside a Singles Stevenson Screen (Dry Bulb gives the air temperature at an instant. Relative Humidity & Dew Point Temperature of air is determined from the Hygrometric Table corresponding to the Dry Bulb & Wet Bulb temperatures at the instant). The Self-Recording Instruments namely Thermograph to record air temperature & Hygrograph to record Relative Humidity of air on daily basis are kept in Double Stevenson Screen. Ordinary Rainguage to record daily total rainfall and the Self-Recoding Rainguage are installed inside the observatory, besides Open Pan Evaporimeter to record the evaporation of air. Charts for all the Self-Recording Instruments are changed at 0820 hrs IST daily. The Wind Instruments namely Wind Vane to record the direction of air, Anemometer to record the wind speed and Sunshine Recorder are installed on the Pilot Balloon Observation Tower. From this tower, Upper Air Circulation over Gangtok is observed manually from instrument known as Optical Theodolite. Upper Data are analyzed digitally through Hand Held Data Logger. Both the Kew Pattern (K.P.) Barometer and Self-Recording Barograph installed in the Observatory Office records the Atmospheric Pressure at any instant.

M.O. Tadong
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Basic Information: The Observatory records Synoptic or Surface Meteorological Data at 03,06 and 12 UTC from the Meteorological Instruments as those installed at M.O. Gangtok and records soil temperatures at depths of 5, 20, 50 and 100 cm respectively at 0700 & 1400 Local Mean Time (LMT). It also records the daily Radiation Data of Incoming Solar Radiation through the Pyranometer and analyzes the data through digitally through Data Logger.

Seismological Observatory Tadong
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Basic Information: It regularly records tremors /earthquakes on charts mounted on instruments called Seismograph on regular basis; and downloads and washes the seismograph charts daily at 0800 hrs IST. Tremors of light/moderate intensity are reported daily to M.C. Gangtok and DGM (Seismology) New Delhi for record. Tremors/Earthquakes actually felt at the Station are immediately reported to suitable State Authorities at Gangtok and at the district levels, Disaster Management Cell of Civil Defense Department Gangtok, M.C. Gangtok and D.G.M. (Seismology) New Delhi and report of damage of property and loss of human life, if any, are collected from the State authorities.