Λεπτομέρειες βιβλιογραφικής εγγραφής
| Τίτλος: |
A NIST-Traceable Lab-to-Sky Spectral and Radiometric Calibration for NASA's High-Altitude Airborne Hyperspectral Pushbroom Imager for Cloud and Aerosol Research and Development (PICARD). |
| Συγγραφείς: |
Hoffmann, Gary D., Ellis, Thomas, Su, Haiping, Shrestha, Alok, Barsi, Julia A., Dominguez, Roseanne, Fraim, Eric, Jacobson, James, Platnick, Steven, Arnold, G. Thomas, Meyer, Kerry, McCarty, Jessica L. |
| Πηγή: |
Remote Sensing; Apr2026, Vol. 18 Issue 8, p1168, 34p |
| Θεματικοί όροι: |
Calibration, Airborne-based remote sensing, Hyperspectral imaging systems, Atmospheric aerosols, Spectrum analysis instruments, Wavelength measurement, Diffraction gratings |
| Εταιρία/Οντότητα: |
United States. National Aeronautics & Space Administration |
| Περίληψη: |
Highlights: What are the main findings? Spectral and radiometric lab calibrations for a new airborne hyperspectral imager agree well in comparison to multiple real-world reference data sources and targets. Spectral stray light characterization facilitates radiometric calibration independent of large spectral differences between incandescent lab sources and solar illumination. What are the implications of the main findings? Characterizing spectral stray light using a GLAMR-like setup with tunable lasers is highly beneficial for diffraction grating spectrometers used for remote sensing. PICARD lab calibrations are validated at high altitudes for environmental remote sensing and testing cloud and aerosol retrieval algorithms or new sensor designs. The Pushbroom Imager for Cloud and Aerosol Research and Development (PICARD) visible through shortwave infrared imaging spectrometer was developed to carry a calibration laboratory environment to high altitudes, while also providing high-dynamic-range bright cloud-top radiance measurements across a field of view just under 50 degrees. The in-flight performance of this new spectroradiometer was validated in comparison to multiple reference data sources and targets using imagery collected aboard NASA's ER-2 high-altitude aircraft during the Western Diversity Time Series (WDTS) airborne science campaign in April 2023 and the September 2024 Plankton, Aerosol, Cloud, and ocean Ecosystem (PACE) Postlaunch Airborne eXperiment (PACE-PAX), both operating out of southern California. PICARD measurements from flights over Railroad Valley Playa, Nevada, USA, were compared to high-resolution radiance spectra of the dry lakebed provided by the Radiometric Calibration Network (RadCalNet) Working Group. Direct comparison to satellite cloud radiometry was enabled by the ER-2 flying in coordination with simultaneous overpasses of the Terra, Aqua, and NOAA-20 Earth-observing satellites during WDTS and with the PACE observatory during PACE-PAX. To account for large spectral differences between incandescent laboratory sources and solar illumination, PICARD calibration relies on measurements using the Goddard Laser for Absolute Measurements of Radiance (GLAMR) to characterize and minimize spectral stray light from the instrument's twin Offner grating spectrometers. Good agreement in comparison to reference measurements demonstrates PICARD's ability to provide imagery for environmental science or for testing new sensor designs and retrieval algorithms for cloud and aerosol research with verified laboratory calibrations at high altitudes. [ABSTRACT FROM AUTHOR] |
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| Βάση Δεδομένων: |
Complementary Index |