phenomenon – Project Haystack


Aspect of scientific interest with measurable quantities


Associated with electricity or with electrical force, power, or energy


Alternating current electricity


Direct current electricity


Electromagnetic radiation in the visible spectrum


Relating to energy from the sun


Matter in one the three states solid, liquid, or gas


Plant or animal material used as fuel to produce electricity or heat


Liquid or gas


Substance with neither definite volume nor shape


The mixture of gases which surrounds the earth


Formaldehyde (CH₂O)


Methane (CH₄)


Carbon monoxide (CO)


Carbon dioxide (CO₂)




Nitrous oxide (N₂O)


Fossil fuel energy source consisting largely of methane and other hydrocarbons


Nitrogen trifluoride (NF₃)


Ammonia (NH₃)


Nitrogen dioxide (NO₂)


Oxygen (O₂) - the common dioxygen allotrope in the air


Ozone (O₃)




By-product of natural gas processing and petroleum refining (C₃H₈)


Sulphur hexafluoride (SF₆)


Water in its gas form


Total volatile organic compound (TVOC)


Substance with definite volume but takes the shape of its container


Liquid phase produced by the condensation of steam or other gas


Liquid fuel specifically designed for use in diesel engines


Petroleum based oil burned for energy


Petroleum derived liquid used as a fuel source


Water in its liquid form


Water expelled from a system to remove mineral build up


Water cooled for use in HVAC and industrial processes


Water supplied to cold taps


Water used used to remove heat through condensation


Relatively cool water without active chilling


Tap water for drinking, washing, cooking, and flushing of toilets


Water present under the ground or from a well


Hot water used for HVAC heating or supplied to hot taps


Water used used to makeup water loss through leaks, evaporation, or blowdown


Water expelled from a system to remove contaminants


Relatively warm water without active heating


Fluid used in refrigeration and heat exchange


Substance with definite shape and volume


Combustible sedimentary rock


Water in its solid form


Particulate matter 0.1


Particulate matter 10


Particulate matter 2.5


Associated with atmospheric air or phenomenon


Flow of air on surface of the Earth