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The Southern Hemisphere ADditional OZonesondes (SHADOZ) project supports the collection of tropospheric ozone data through balloon-borne ozonesonde measurements for validating and Total Ozone Mapping Spectrometer (TOMS) data from satellites. The project launches ozondesoondes approximately every two weeks from 10 tropical and subtropical southern hemisphere sites. Currently, twelve active sites are participating in SHADOZ. The sites are at Ascension Island; American Samoa; Fiji; Irene, South Africa; Java, Indonesia; Malindi and Nairobi, Kenya; Natal, Brazil; Paramaribo, Surinam; La Réunion, France; San Cristóbal, Galapagos; and Kuala Lumpur, Malaysia. For more information and access to data, see: "http://croc.gsfc.nasa.gov/shadoz/"
SHADOZ