Spectral and radiometric performance of the Goddard laser for absolute measurement of radiance

Barsi, Julia A.; McCorkel, Joel T.; McAndrew, Brendan; Shuman, Timothy M.; Sushkov, Andrei B.; Rodriguez, Michael R.; Reed, Nicholas G.

doi:10.1117/12.2678195

Cited by 3 publications

(2 citation statements)

References 16 publications

(16 reference statements)

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“…The SCR instrument is expected to undergo a thorough laboratorybased characterisation during the assembly, integration, and test phase to provide the baselines of the instrument before launch. In a state-of-the-art sensor characterisation laboratory such as the Goddard Laser for Absolute Measurement of Radiance (GLAMR) Facility, absolute radiometric calibration with an uncertainty of <0.09% in the visible and 0.3 to 1% uncertainty in other spectral regions can be achieved [33]. After launch, an ex- To capture the SNOs equally across all latitudes as shown in Figure 8, the MLT difference between the SCR and the reference satellite should be minimal, ideally less than 20 min.…”

Section: Scr Instrument Calibrationmentioning

confidence: 99%

Concept of a Satellite Cross-Calibration Radiometer for In-Orbit Calibration of Commercial Optical Satellites

Thankappan,

Christopherson,

Cantrell

et al. 2024

Remote Sensing

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The satellite Earth observation (EO) sector is burgeoning with hundreds of commercial satellites being launched each year, delivering a rich source of data that could be exploited for societal benefit. Data streams from the growing number of commercial satellites are of variable quality, limiting the potential for their combined use in science applications that need long time-series data from multiple sources. The quality of calibration performed on optical sensors onboard many satellite systems is highly variable due to calibration methods, sensor design, mission objective, budget, or other operational constraints. A small number of currently operating well-characterised satellite systems with onboard calibration, such as Landsat-8/9 and Sentinel-2, and planned future missions, like the NASA Climate Absolute Radiance and Refractivity Observatory (CLARREO) Pathfinder, the European Space Agency (ESA)’s Traceable Radiometry Underpinning Terrestrial and Helio Studies (TRUTHS), and LIBRA from China, are considered benchmarks for optical data quality due to their traceability to international measurement standards. This paper describes the concept of a space-based transfer calibration radiometer called the Satellite Cross-Calibration Radiometer (SCR) that would enable the calibration parameters from satellites such as Landsat-8/9, Sentinel-2, or other benchmark systems to be transferred to a range of commercial optical EO satellite systems while in orbit. A description of the key characteristics of the SCR to successfully operate in orbit and transfer calibration from reference systems to client systems is presented. A system like the SCR in orbit could complement SI-Traceable satellites (SITSats) to improve data quality and consistency and facilitate the interoperable use of data from multiple optical sensor systems for delivering higher returns on the global investment in EO.

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Section: Scr Instrument Calibrationmentioning

confidence: 99%

Concept of a Satellite Cross-Calibration Radiometer for In-Orbit Calibration of Commercial Optical Satellites

Thankappan,

Christopherson,

Cantrell

et al. 2024

Remote Sensing

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“…The OCI spectral characteristics were determined by sweeping a monochromatic source across the OCI spectral range. The test program used the Goddard Laser for Absolute Measurement of Radiance (GLAMR) as a tunable monochromatic source [39]. The laser source was fed into a 20 inch integrating sphere with three NIST (National Institute of Standards and Technology) traceable calibrated radiometers.…”

Section: A Spectral Characteristicsmentioning

confidence: 99%

The Ocean Color Instrument (OCI) on the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) Mission: System Design and Prelaunch Radiometric Performance

Meister,

Knuble,

Gliese

et al. 2024

IEEE Trans. Geosci. Remote Sensing

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The Ocean Color Instrument (OCI) is the primary payload on NASA's Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission. Its primary purpose is to enable new scientific studies of ocean biology, aerosols, and clouds. This paper describes the design of the instrument and its radiometric performance as measured during the prelaunch characterization campaign. OCI will be the first radiometer to provide hyperspectral (340nm-895nm) daily global coverage of top-of-atmosphere radiances.Seven multispectral bands cover wavelengths from 940nm to 2260nm. The spatial resolution is about 1.2km. OCI performance is optimized for ocean color applications, with a focus on high signal-to-noise ratio (SNR) at low radiance levels and high radiometric accuracy.

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The JPSS-3 VIIRS version 2 at-launch relative spectral response characterization

Moeller,

Schwarting,

Moyer

et al. 2023

Earth Observing Systems XXVIII

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The JPSS-3 VIIRS sensor has completed its pre-launch test program including measurements for characterizing the VIIRS relative spectral response (RSR) in support of the Sensor and Environmental Data Records (SDR and EDR, resp.) that will be generated from VIIRS on-orbit observations. Government team subject matter experts of the VIIRS DAWG have analyzed the VIIRS spectral measurements and produced the VIIRS spectral characterization, in the form of band-average and supporting detector level RSR for each VIIRS band. The characterization is based upon the analysis of independent SpMA dual monochromator (all bands) and GSFC GLAMR laser system (reflectance bands only) spectral measurements. The SpMA and GLAMR measurements for reflectance bands (DNB LGS and MGS, I1-I3, M1-M11) were combined to produce a “fused” RSR. For emissive bands (I4, I5, M12-M16), the SpMA measurements provide the characterization. The effort has led to the VIIRS Version 2 RSR release, the official at-launch RSR characterization for the JPSS-3 VIIRS mission. The JPSS-3 RSR are a close match to those of JPSS-2. An assessment on compliance with spectral performance metrics finds that VIIRS band-average RSR are compliant on nearly all metrics, with only a single minor exception. The Version 2 RSR release is available under EAR99 restrictions to the science community on the restricted access NASA Sharepoint.

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Spectral and radiometric performance of the Goddard laser for absolute measurement of radiance

Cited by 3 publications

References 16 publications

Concept of a Satellite Cross-Calibration Radiometer for In-Orbit Calibration of Commercial Optical Satellites

Concept of a Satellite Cross-Calibration Radiometer for In-Orbit Calibration of Commercial Optical Satellites

The Ocean Color Instrument (OCI) on the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) Mission: System Design and Prelaunch Radiometric Performance

The JPSS-3 VIIRS version 2 at-launch relative spectral response characterization

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