@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/8394197b-b391-45fe-bce4-dc156f8fe447>
  ns0:resource [ ] ;
  ns0:altLabel [ ] ;
  skos:definition """The Stratospheric Aerosol and Gas Experiment I (SAGE I)
instrument was launched February 18, 1979, aboard the
Applications Explorer Mission-B (AEM-B) satellite (McCormick et
al., 1979). The SAGE I instrument had four spectral channels
centered at wavelengths of 1000, 600, 450, and 385 nanometers
for nearly global measurement of aerosol extinction profiles and
ozone and nitrogen dioxide concentration profiles. The AEM-B
satellite was placed in an orbit of approximately 600 kilometers
at an inclination of 56 degrees to extend the latitudinal
coverage for the solar occultation measurements from 79 degrees
South to 79 degrees North. The SAGE I instrument collected data
for almost three years until the AEM-B satellite power subsystem
failed.

The SAGE I instrument was a sun photometer that measured the
attenuation of solar radiation through the Earth's atmosphere
during spacecraft sunrise and sunset in the four spectral
regions mentioned above. The solar radiance data were combined
with spacecraft ephemeris and NOAA meteorological data and then
numerically inverted to yield altitude profiles of aerosol
extinction at wavelengths of 1000 and 450 nanometers and
altitude profiles of ozone and nitrogen dioxide concentration.

The SAGE I aerosol data were validated by comparison with
correlative lidar and dustsonde in situ measurements; the ozone
data were validated by comparison with balloon ECC ozonesonde
and rocket measurements; and the nitrogen dioxide measurements
were compared with climatology.

[Summary provided by NASA]


Group: Instrument_Details
   Entry_ID: SAGE I
   Group: Instrument_Identification
      Instrument_Category: Earth Remote Sensing Instruments
      Instrument_Class: Passive Remote Sensing
      Instrument_Type: Spectrometers/Radiometers
      Instrument_Subtype: Spectrometers
      Short_Name: SAGE I
      Long_Name: Stratospheric Aerosol and Gas Experiment I
   End_Group
   Group: Associated_Platforms
      Short_Name: AE-B
   End_Group
   Online_Resource: http://eosweb.larc.nasa.gov/GUIDE/campaign_documents/sage1_project.html
   Sample_Image: http://eosweb.larc.nasa.gov/guide/sage1/images/sage1.gif
End_Group"""@en ;
  skos:prefLabel "SAGE I"@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/8394197b-b391-45fe-bce4-dc156f8fe447> .