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The SAGE III instrument employs the occultation measurement technique to obtain measurements of the transmission of the atmosphere.
Solar measurements are collected twice each orbit when the satellite ascends or descends from behind the Earth.
Lunar measurements are collected when at least 50% of the moon is visible and the sun is not.
The high inclined orbit for the Meteor-3M spacecraft yields primarily coverage for SAGE III solar measurements between 50° and 80° North and 30° and 50° South.
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The high northern latitude coverage provides insight into processes leading to ozone depletion during the boreal winter.
This solar coverage complements the mid and low latitude measurements provided by SAGE II mission.
Lunar measurements have greater latitudinal coverage.
Predicted measurement coverage for the SAGE III/Meteor-3M mission is available in two forms: (1) an annual plot (latitude/time) updated monthly, and (2) through a search engine.
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