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... > Instruments > Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Spectrometers > SAGE I

Preferred term

SAGE I  

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)

Broader concept

URI

https://gcmd.earthdata.nasa.gov/kms/concept/8394197b-b391-45fe-bce4-dc156f8fe447

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