Measurement : Visibility
The greatest horizontal distance in a given direction at which it is just possible to see and identify with the unaided eye (a) in the daytime, a prominent dark object against the sky at the horizon, and (b) at night, a moderately intense light source.
Categories
Atmospheric State
Instruments
The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes.
- ARM Instruments
- External Instruments
- Field Campaign Instruments
Datastreams
- LDIS : Laser Disdrometer Datastreams
- PARS2 : OTT Parsivel2 Laser Disdrometer
- METTWR : Surface and Tower Meteorological Instrumentation at NSA Datastreams
- MET : Surface Meteorological Instrumentation Datastreams
- MET : ARM-standard Meteorological Instrumentation at Surface
- RUC : Rapid Update Cycle Model Data Datastreams
- RUC20ISOB : Rapid Update Cycle (RUC) model: daily isobaric analysis data, 20 km resolution
- ALLRUC20ISOB : Rapid Update Cycle (RUC) model: isobaric main analysis data, 20-km resolution
- ALLRUC40ISOB : Rapid Update Cycle (RUC) model: isobaric main analysis data, 40-km resolution
- SYNRUC20ISOB : Rapid Update Cycle (RUC) model: isobaric output, 20 km grid, averaged to 40 km
- NOAASURF : NOAA Surface Meteorology Data, collected by NWS and NCDC Datastreams
- 60NWSSURF : National Weather Service (NWS) surface meteorology data: 60-minute averages
- MOLTS : Model Output Location Time Series Datastreams
- MOLTSEDASSFCCLASS1 : Model Output Loc. Time Ser. (MOLTS): EDAS meteor. analy., enhanced surface, params, stations