A5004940104- Calibration and Measurement Techniques
- Atmospheric Ozone and Climate
- Marine and coastal ecosystems
- Atmospheric and Environmental Gas Dynamics
- Infrared Target Detection Methodologies
- Water Quality Monitoring and Analysis
- Atmospheric aerosols and clouds
- Remote Sensing in Agriculture
- Urban Heat Island Mitigation
- Grey System Theory Applications
- Water Quality Monitoring Technologies
- Spacecraft Design and Technology
- Remote Sensing and LiDAR Applications
- Advanced Measurement and Metrology Techniques
- Color Science and Applications
- Computer Graphics and Visualization Techniques
- Satellite Image Processing and Photogrammetry
- 3D Surveying and Cultural Heritage
- Impact of Light on Environment and Health
- Physics and Engineering Research Articles
- Planetary Science and Exploration
- Oceanographic and Atmospheric Processes
- Remote-Sensing Image Classification
- Remote Sensing and Land Use
- Spacecraft and Cryogenic Technologies
Goddard Space Flight Center
2014-2025
Arge Vegetationsökologie und Landschaftsplanung
2023
Science Applications International Corporation (United States)
2004-2017
National Aeronautics and Space Administration
2008
University of Maryland, College Park
2001
Universität Hamburg
1998-2000
Lenzing (Austria)
1998
University of Hagen
1987
Nord University
1953
University of Palestine
1953
Abstract The Plankton, Aerosol, Cloud, Ocean Ecosystem (PACE) mission represents the National Aeronautics and Space Administration’s (NASA) next investment in satellite ocean color study of Earth’s ocean–atmosphere system, enabling new insights into oceanographic atmospheric responses to changing climate. PACE objectives include extending systematic cloud, aerosol, biological biogeochemical data records, making essential measurements further understand marine carbon cycles, food-web...
Abstract. The Collection 6 (C6) MODIS (Moderate Resolution Imaging Spectroradiometer) land and atmosphere data sets are scheduled for release in 2014. C6 contains significant revisions of the calibration approach to account sensor aging. This analysis documents presence systematic temporal trends visible near-infrared (500 m) bands 5 (C5) Terra and, lesser extent, Aqua geophysical sets. Sensor degradation is largest blue band (B3) on decreases with wavelength. Calibration causes negative...
Abstract The Deep Blue (DB) algorithm's primary data product is midvisible aerosol optical depth (AOD). DB applied to Moderate Resolution Imaging Spectroradiometer (MODIS) measurements provides a record since early 2000 for MODIS Terra and mid‐2002 Aqua. In the previous version (Collection 5, C5), production from was halted in 2007 due sensor degradation; new Collection 6 (C6) has both improved science algorithms radiometric calibration. This includes additional calibration corrections...
The Ocean Color Instrument (OCI) is the primary payload on NASA's Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission. Its purpose to enable new scientific studies of biology, aerosols, and clouds. This paper describes design instrument its radiometric performance as measured during prelaunch characterization campaign. OCI will be first radiometer provide hyperspectral (340nm-895nm) daily global coverage top-of-atmosphere radiances. Seven multispectral bands cover wavelengths from 940nm...
Ocean-color applications require maximum uncertainties in blue-wavelength water-leaving radiances oligotrophic ocean of approximately 5%. Water-leaving from Moderate Resolution Imaging Spectroradiometer (MODIS) on the Terra satellite, however, exhibit temporal drift order 15% as well sensor changes response versus scan and polarization sensitivity, which cannot be tracked by onboard calibrators. This paper introduces an instrument characterization approach that uses Earth-view data a...
The Ocean Biology Processing Group (OBPG) at NASA's Goddard Space Flight Center is responsible for the processing and validation of oceanic optical property retrievals from Sea-viewing Wide Field-of-view Sensor (SeaWiFS) Moderate Resolution Imaging Spectroradiometer (MODIS). A major goal this activity production a continuous ocean color time-series spanning mission life these sensors September 1997 to present time. This paper presents an overview calibration strategy employed optimize verify...
The Moderate Resolution Imaging Spectroradiometer (MODIS) is currently flying on both the Terra and Aqua satellite platforms. Ocean Biology Processing Group (OBPG) at NASA Goddard Space Flight Center producing operational ocean color products from MODIS-Aqua sensor; however, documented uncertainties instabilities in prelaunch on-orbit characterization have inhibited production of similar MODIS-Terra. In particular, radiometric response 412-nm band has degraded by more than 40% over 7-year...
The National Aeronautics and Space Administration ocean color products of Sea-viewing Wide Field-of-view Sensor (SeaWiFS) Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua have been reprocessed in 2009. This paper describes the changes to calibration approach for MODIS Aqua. Due a significant downward trend operational water-leaving radiances at 412 nm, previous was no longer sufficient. new uses SeaWiFS adjust temporal trends radiometric bands 443 nm. adjustments beginning scan are...
Ocean color climate data records (CDRs) require water-leaving radiances with 5% absolute and 1% relative accuracies as input. Because of the amplification any sensor calibration errors by atmospheric correction, accuracy requirement translates into a 0.1% long-term radiometric stability for top-of-the-atmosphere (TOA) radiances. The rigorous prelaunch on-orbit program developed implemented Sea-viewing Wide Field-of-view Sensor (SeaWiFS) NASA Biology Processing Group (OBPG) has led to...
Observations of the Moon provide a primary technique for on-orbit cross calibration Earth remote sensing instruments. Monthly lunar observations are major components strategies SeaWiFS and MODIS. has collected more than 132 low phase angle 59 high over 12 years, Terra MODIS 82 scheduled 297 unscheduled nine Aqua 61 171 seven years. The NASA Ocean Biology Processing Group Calibration Validation Team Characterization Support use USGS RObotic Lunar Observatory (ROLO) photometric model to...
The NASA Ocean Biology Processing Group (OBPG) developed two independent calibrations of the Suomi National Polar-Orbiting Partnership (SNPP) Visible Infrared Imaging Radiometer Suite (VIIRS) moderate resolution reflective solar bands using diffuser measurements and lunar observations, implemented a combined solar- lunar-based calibration to track temporal changes in radiometric response instrument. Differences between data sets have been used identify issues verify improvements each....
The polarization correction for the Moderate-Resolution Imaging Spectroradiometer (MODIS) instruments on Terra and Aqua satellites is described. focus prelaunch characterization derivation of coefficients processing ocean color data. effect demonstrated. radiances at top atmosphere need to be corrected by as much 3.2% in 412 nm band. water-leaving can exceed 50%. produces good agreement MODIS radiance time series with data from another, independent satellite-based sensor, Sea-Viewing Wide...
The Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission represents NASA's next investment in satellite color and the study of Earth's ocean-atmosphere system, enabling new insights into oceanographic atmospheric responses to changing climate. PACE objectives include extending systematic cloud, aerosol, biological biogeochemical data records, making essential measurements further understand marine carbon cycles ecosystem a climate, as well improving knowledge how aerosols influence...
This paper summarizes the results from system level test campaign of Engineering Test Unit (ETU) ‘Ocean Color Instrument’ (OCI), primary payload NASA’s ‘Plankton, Aerosol, Cloud and ocean Ecosystem’ (PACE) mission. The main goals were to optimize characterization procedures evaluate performance relative model predictions. Critical parameters such as radiometric gain, signal-to-noise ratio, polarization, instantaneous field-of-view, temperature sensitivity, spectral response stability...
The Ocean Color Instrument (OCI) onboard NASA's Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission has performed three monthly lunar calibrations. moon is an extended source over a large dark background, making it ideal target for evaluating OCI's straylight and crosstalk performance. data analysis showed the to be lower than prelaunch measurements, especially in along-track direction, where very little detected. Based on data, measured coefficients were reduced, correction was tested...
Following its launch from Kennedy Space Center in February 2024, NASA’s Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission has been revolutionizing our understanding of Earth’s systems. The observatory hosts three cutting-edge instruments: the Ocean Color Instrument (OCI), a hyperspectral radiometer, and two multi-angular polarimeters, SpexOne HARP2. Together, these instruments are collecting unprecedented data on living oceans, atmospheric aerosols clouds,...
The Sea-Viewing Wide-Field-of-View Sensor (SeaWiFS) has made monthly observations of the Moon since 1997. Using 66 measurements, SeaWiFS calibration team developed a correction for instrument's on-orbit response changes. Concurrently, lunar irradiance model been by U.S. Geological Survey (USGS) from extensive Earth-based Moon. irradiances measured are compared with USGS model. comparison shows essentially identical histories SeaWiFS, differences less than 0.05% per thousand days in long-term...
Ocean color products such as, e.g., chlorophyll-a concentration, can be derived from the top-of-atmosphere radiances measured by imaging sensors on earth-orbiting satellites. There are currently three National Aeronautics and Space Administration in orbit capable of providing ocean products. One these is Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua satellite, whose most widely used three. A recent improvement to MODIS calibration methodology has land targets improve accuracy....
The SeaWiFS Project uses monthly lunar calibrations to monitor the on-orbit radiometric stability of over course its mission. Ongoing analyses steadily increasing calibration data set have led improvements in methodology time. measurements must be normalized a common viewing geometry for time series track instrument. Corrections computed from and observations include Sun-Moon instrument-Moon distances, oversampling image, variations phase angles. has recently implemented correction libration...
The Moderate Resolution Imaging Spectroradiometer (MODIS) on the Aqua platform has nine spectral bands with center wavelengths from 412 to 870 nm that are used produce standard ocean color data products. Ocean scenes usually contain high contrast due presence of bright clouds over dark water. About half MODIS pixels flagged as spatial stray light contaminated. been characterized for effects prelaunch. In this paper, we derive point-spread functions based prelaunch line-spread function...
The retrieval of aerosol properties from spaceborne sensors requires highly accurate and precise radiometric measurements, thus placing stringent requirements on sensor calibration characterization. For the Terra/Moderate Resolution Imaging Spectroradiometer (MODIS), characteristics detectors certain bands, particularly band 8 [(B8); 412 nm], have changed significantly over time, leading to increased uncertainty. In this paper, we explore a possibility utilizing cross method developed for...
Scheduled for launch in January 2024, the Phytoplankton, Aerosol, Cloud, and ocean Ecosystem (PACE) mission represents NASA's next investment biology, clouds, aerosol data records [1]. A key feature of PACE is inclusion an advanced satellite radiometer known as Ocean Color Instrument (OCI), a global mapping that combines multispectral hyperspectral remote sensing. This paper describes results prelaunch test campaign OCI Flight Unit. The measured flight unit performance exceeded requirement...