You asked, we answered! The LANCE (Land, Atmosphere Near real-time Capability for EOS) ACSI (American Customer Satisfaction Index) survey was conducted in October-November 2014. LANCE has responsed to questions and comments posed within the survey. Read more...

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OMI sample data

Ozone Monitoring Instrument (OMI)

Ozone columns, aerosols, clouds, surface UV irradiance and sulfur dioxide Level 2 and Level 3 products are available from the OMI instrument on the Aura platform.

The Ozone Monitoring Instrument (OMI) is a Dutch-­Finnish instrument on board NASA’s Aura Satellite, launched in July 2004. OMI is a wide swath, nadir viewing, near­ UV and visible spectrograph that measures ozone columns and profiles, aerosols, clouds, surface ultraviolet (UV) irradiance, and the trace gases Nitrogen Dioxide (NO2), Sulfur Dioxide (SO2), and Formaldehyde (HCHO). For this data to be used in forecast models it needs to be processed and sent to customers within 3 hours from the first measurement of a 100 minute orbit, which leaves 80 minutes for processing and distribution. In comparison the OMI “standard” products are usually processed within 6 to­ 24 hours on the OMI Science Investigator­-led Processing Systems (SIPS) and then made available for distribution. In addition, the NRT data received is raw, unfiltered data from the Spacecraft Contact Session, which is of varying lengths and includes duplicate packets. In order to produce quality data within these time constraints, algorithms need to be tuned to run faster, processing run in parallel, and data distributed to customers in a timely manner. The OMI NRT capability is an element of NASA's Land Atmosphere Near real-­time Capability for EOS (LANCE) system.

For more information on OMI near real-time data, please refer to the OMI NRT Data User’s Guide.