Selected Results Obtained with DLR’s Airborne EnMAP Demonstrator
C. Köhler, M. Bachmann, A. Baumgartner, S. Holzwarth, B. Pflug, M. Schneider
WHISPERS 2021 | C. H. Koehler et al. | 2021-03-24DLR.de • Chart 1
Optical Airborne Remote Sensing
(OpAiRS)
Collaboration across departments of the DLR Earth
Observation Center in Oberpfaffenhofen
ISO 9001 certified user service since 2007
We acquire airborne imaging spectroscopy data to support
DLR scientists and their associates in
• developing novel remote sensing applications
• preparing upcoming satellite missions
• validating data of spaceborne imaging spectrometers
Strong focus on data quality, instrument characterisation &
calibration
We perform usually 1-2 campaigns per year with 5-10
surveys per campaign
WHISPERS 2021 | C. H. Koehler et al. | 2021-03-24DLR.de • Chart 2
Camarena
Sailershausen
www.dlr.de/opairs
Mecklenburg
OpAiRS HySpex Surveys in 2020
Sensors and Calibration Facilities
DLR EnMAP Simulator since 2012: HySpex VNIR-1600 +
SWIR-320m-e on DLR Cessna Grand Caravan and Dornier 228
HySpex VNIR-3000N & SWIR-384 currently in commissioning phase
Calibration Laboratory partly funded by ESA as Calibration Home
Base (CHB) for ESA’s Airborne PRISM Experiment (APEX)
Current setups for geometric, spectral & radiometric characterisation
including linearity, stray light & temperature dependence
Traceable to national standards (PTB, NIST)
Used for the development of improved Level 1 products
(measurement techniques & algorithms)
WHISPERS 2021 | C. H. Koehler et al. | 2021-03-24DLR.de • Chart 3
Baumgartner, Andreas and Köhler, Claas H. (2020)Transformation of point spread functions on an individual pixel scale.Optics Express, 28 (26), DOI: 10.1364/oe.409626
DESIS Validation at CHIME Preparation Site Camarena (Spain)
Airborne & in-situ reflectance measurements for the validation of
• L2A product (BOA surface reflectance)
• L1 product (radiometric calibration) by simulation of TOA at-sensor radiance
• Higher-level products such as Cover% (fCover) or Soil Organic Matter
DESIS scene HySpex flight line
August 2020
WHISPERS 2021 | C. H. Koehler et al. | 2021-03-24DLR.de • Chart 4
EnMAP Preparation at University Forest Sailershausen (Germany)
Airborne and ground based spectroscopic measurements in 2018 & 2020 to investigate
drought stress effects on different tree species
Additionally regular scientific activities for research and education are organized by Julius-
Maximilians-Universität of Würzburg (JMU)
JMU established patches to study multidiversity and multifunctionality in production forests
→ monitoring since 2018
Forest health classification Ground based measurements HySpex false color RGB
WHISPERS 2021 | C. H. Koehler et al. | 2021-03-24DLR.de • Chart 5
Sentinel-2 Validation at Mecklenburg Lake District (Germany)
WHISPERS 2021 | C. H. Koehler et al. | 2021-03-24DLR.de • Chart 6
0.000
0.001
0.002
0.003
0.004
0.005
400 500 600 700 800 900
Re
mo
te s
en
sin
g s
urf
ace
ref
lect
ance
Wavelength [nm]
Lake Stechlin 2018 MCS
HySpex
S2 ATCOR
0.000
0.100
0.200
0.300
0.400
400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200
Irra
dia
nce
su
rfac
e r
efle
ctan
ce
Wavelength [nm]
Meadow 2018 SVC
HySpex
S2 ATCOR
Airborne and ground based spectroscopic measurements over land and water in May 2018
Validation of the Sentinel-2 L2A product (BOA surface reflectance)
Top Related