@prefix ns0: <http://gcmd.gsfc.nasa.gov/kms#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/2ef354d6-de14-42f5-99ec-73fbc9dac4de>
  ns0:altLabel [ ] ;
  skos:definition """N-MASS (Nucleation-Mode Aerosol Size Spectrometer) measures the
concentration of particles as a function of diameter from
approximately 4 to 60 nm.  A sample flow is continuously
extracted from the free stream using a decelerating inlet and is
transported to the N-MASS.  Within the instrument, the sample
flow is carried to 5 parallel condensation nucleus counters
(CNCs).  Each CNC is tuned to measure the cumulative
concentration of particles larger than certain diameter. The
minimum detectable diameters for the 5 CNCs are 4.0, 7.5, 15, 30
and 55 nm, respectively. An inversion algorithm is applied to
recover a continuous size distribution in the 4 to 60 nm
diameter range.

Additional information available at
"http://www.engr.du.edu/aerosol/nmass.htm\""""@en ;
  skos:prefLabel "N-MASS"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/055a79c7-61db-4250-abad-f1e09909f14c> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/055a79c7-61db-4250-abad-f1e09909f14c>
  skos:prefLabel "Spectrometers"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/2ef354d6-de14-42f5-99ec-73fbc9dac4de> .