Concept information
Preferred term
NMASS II
Definition
- The nucleation-mode aerosol size spectrometer (NMASS) 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 NMASS. Within the instrument, the sample flow is carried to 5 parallel condensation nucleus counters (CNCs) as shown in Fig. 1. 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. (en)
Broader concept
Change note
- 2021-12-02 13:39:14.0 [sritz] Insert Concept add broader relation (NMASS II [b2f03a5a-056d-44c9-af48-b0e46a1b94fb,835958] - Spectrometers/Radiometers [ecd58f82-8f96-45e1-9547-dd4a02291bd9,828525]);
URI
https://gcmd.earthdata.nasa.gov/kms/concept/b2f03a5a-056d-44c9-af48-b0e46a1b94fb
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