The GEOstationary Coastal and Air Pollution Events (GEO-CAPE) mission was recommended
by the NRC's Earth Science Decadal Survey
to measure tropospheric trace gases and aerosols and coastal ocean phytoplankton, water quality and
biogeochemistry from geostationary orbit, providing multiple daily observations within the field of view.
Multiple observations per day are required to explore the physical, chemical, and dynamical processes that
determine tropospheric composition and air quality over spatial scales ranging from urban to continental,
and over temporal scales ranging from diurnal to seasonal. Likewise, high frequency satellite observations
are critical to studying and quantifying biological, chemical, and physical processes within the coastal ocean and beyond.
These observations are to be achieved from a vantage point near 95°-100°W,
to potentially view North and South America as well as the adjacent oceans. GEO-CAPE
will join the global constellation of geostationary atmospheric chemistry and coastal ocean color
sensors planned to be in orbit in the 2020 time frame.
The Science Working Groups (SWGs) have endorsed the concept of phased implementation
using commercial satellites to reduce mission risk and cost. Multiple instruments are being considered.