SAGE III/ISS Science Team (ROSES 2017)

Funding Agency:
National Aeronautics and Space Administration

Atmospheric composition changes affect air quality, weather, climate, and critical constituents such as ozone. Atmospheric exchange links terrestrial and oceanic pools within the carbon cycle and other biogeochemical cycles. Solar radiation affects atmospheric chemistry and is thus a critical factor in atmospheric composition. Atmospheric composition is central to Earth system dynamics, since the atmosphere integrates surface emissions globally on time scales from weeks to years and couples several environmental issues.

The Stratospheric Aerosol and Gas Experiment III (SAGE III) was launched to the International Space Station (ISS) on 19 February 2017. The SAGE III instrument’s primary objective is to monitor the vertical distribution of aerosols, ozone, and other trace gases in the Earth’s stratosphere and troposphere to enhance our understanding of ozone recovery and climate change processes in the stratosphere and upper troposphere (

SAGE III is the third generation of solar occultation instruments operated by NASA. SAGE I was flown from 1979 through 1981 as a follow-up to the Stratospheric Aerosol Measurement (SAM) on the July 1975 Apollo-Soyuz mission. SAGE II, launched aboard the Earth Radiation Budget Satellite (ERBS), operated from 1984 through 2005. The first SAGE III instrument was launched in 2001 on a Russian satellite, Meteor-3M, and provided data through 2005 ( For the current SAGE III mission, the ISS inclined orbit of 51.6° is ideal because the orbit permits solar occultation measurement coverage everywhere between approximately 70° N and 70° S latitudes. In addition to solar occultation measurements, SAGE III/ISS, in common with SAGE III/Meteor-3M, is making measurements using both lunar occultation and limb scattering measurement techniques. 


  • Notice of Intent: Sep. 7, 2017
  • Proposals: Nov. 7, 2017

Agency Website

Areas of Interest

This program element seeks proposals for members of the SAGE III Science Team. Proposals are sought in the following topical areas, which are presented in no particular priority order. While NASA is soliciting proposals in all of the areas, it is not committing to funding proposals in each of these areas.

  • Independent validation
  • Limb scatter retrieval algorithm development or adaptation
  • Assessing long-term changes in atmospheric composition
  • Aerosol and cloud studies
  • Data Analysis and modeling efforts using SAGE datasets
  • Multi-sensor data product development

Funding Type





Engineering and Physical Sciences
Environmental & Life Sciences

External Deadline

November 7, 2017