2 research outputs found
EnMAP Radiometric Inflight Calibration, Post-Launch Product Validation, and Instrument Characterization Activities
This study reports the calibration and validation activities
for the Environmental Mapping and Analysis Program
(EnMAP; www.enmap.org). EnMAP is a German imaging
spectroscopy satellite mission with the declared goal to
investigate the Earth’s surface with a so far surpassing
quality. The key scientific questions to which EnMAP will
contribute are related to climate change impacts, land cover
changes and processes, natural resources, biodiversity and
ecosystems, water availability and quality, geohazards and
risk management. The satellite operates in a sun
synchronous orbit in 650 km height with a local time of the
descending node set to 11:00 and an across tilt opportunity
to improve the local revisit time. Two pushbroom
spectrometers with 242 channels in total cover the spectral
range from 420 nm to 2450 nm with a mean resolution of
6.5 nm in the visible and 10 nm in the shortwave-infrared.
The ground nadir pixel size is 30 m and 1000 spatial pixels
generate a swath with of 30 km. For the CalVal activities, the
routine calibration is conducted within the ground segment
of DLR, while the independent validation activities are lead
by GFZ. Data is operationally processed on-ground to
standardized calibrated products and delivered to the
international user community [1]. Standardized data
products will comprise radiance and reflectance products
that make use of calibration information gained pre- and in-
flight. To ensure high quality standards, additional
independent product validation activities are planned