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发表于 2017-3-26 20:17:36
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It is beneficial to collect both the temporal and
spatial data of small particles in the atmosphere. The
CALIPSO mission allows scientists to study the radiative
effects of clouds and aerosols on a global scale. Level 2
CALIPSO data are available in two different forms: the
nominal product and the expedited product. The
nominal product is available approximately five days
after measurements are collected and is the primary
dataset for science analysis. The expedited product is
designed to support real-time applications and uses a
simple calibration scheme. Expedited processing does
not wait for the arrival of more accurate ephemeris data
and also uses climatology data instead of assimilated
meteorological data. The expedited dataset is available
~12 hours after Level 0 data are down linked to a
ground receiving station. Being that the nominal product
goes through a more rigorous computational process
and does not make calibration and climatology
assumptions, we assume the nominal product to be the
truth in comparison to the expedited product. |
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