The Global Space-Based Inter-Calibration System

Goldberg, Mitchell D.; Ohring, George; Butler, J.; Cao, Changyong; Datla, R.; Doelling, David R.; Gärtner, V.; Hewison, Tim J.; Iacovazzi, B.; Kim, D.; Kurino, T.; Lafeuille, J.; Minnis, Patrick; Renaut, D.; Schmetz, Johannes; Tobin, David C.; Wang, L.; Weng, F.; Wu, Xiangqian; Yu, Fangfang; Zhang, P.; Zhu, T.

doi:10.1175/2010bam2967.1

Cited by 127 publications

(19 citation statements)

References 8 publications

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“…Similarly, brightness temperature errors could compromise the effectiveness of the cloud screening algorithms leading to classification errors allowing pixels with cloud contamination to be misidentified as cloud-free. The objective of the Global Space-based Inter-Calibration System (GSICS) program is to assess the calibration accuracy of thermal infrared (IR) channels of imaging radiometers on geostationary satellites [63]. The reference sensors are the hyperspectral Infrared Atmospheric Sounding Interferometers (IASI) on the European polar-orbiting MetOp satellites [64].…”

Section: Discussionmentioning

confidence: 99%

The Accuracies of Himawari-8 and MTSAT-2 Sea-Surface Temperatures in the Tropical Western Pacific Ocean

et al. 2018

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Over several decades, improving the accuracy of Sea-Surface Temperatures (SSTs) derived from satellites has been a subject of intense research, and continues to be so. Knowledge of the accuracy of the SSTs is critical for weather and climate predictions, and many research and operational applications. In 2015, the operational Japanese MTSAT-2 geostationary satellite was replaced by the Himawari-8, which has a visible and infrared imager with higher spatial and temporal resolutions than its predecessor. In this study, data from both satellites during a three-month overlap period were compared with subsurface in situ temperature measurements from the Tropical Atmosphere Ocean (TAO) array and self-recording thermometers at the depths of corals of the Great Barrier Reef. Results show that in general the Himawari-8 provides more accurate SST measurements compared to those from MTSAT-2. At various locations, where in situ measurements were taken, the mean Himawari-8 SST error shows an improvement of~0.15 K. Sources of the differences between the satellite-derived SST and the in situ temperatures were related to wind speed and diurnal heating.

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Section: Discussionmentioning

confidence: 99%

The Accuracies of Himawari-8 and MTSAT-2 Sea-Surface Temperatures in the Tropical Western Pacific Ocean

et al. 2018

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“…With the complete image of the Moon in a single swath, the north, south, east, and west edges can be clearly identified, which permits every detector sample to be precisely registered to the lunar surface. The World Meteorological Organization (WMO), through the Global Space-based Inter-Calibration System (GSICS) [5], coordinates international collaboration to develop a standard methodology for vicarious calibration of satellites instrument using lunar irradiance. ABI is particularly well suited for such an approach.…”

Section: Observations Of the Moonmentioning

confidence: 99%

From Photons to Pixels: Processing Data from the Advanced Baseline Imager

et al. 2018

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Abstract:The Advanced Baseline Imager (ABI) is the primary Earth observing sensor on the new generation Geostationary Operational Environmental Satellites (GOES-R) series, and provides significant spectral, spatial and temporal observational enhancements compared to the legacy GOES satellites. ABI also provides enhanced capabilities for operational sensor calibration and image navigation and registration (INR) to enable observations of the Earth with high spectral fidelity as well as creating images that are accurately mapped and co-registered over time. Unlike earlier GOES Imagers, ABI has onboard calibration capability for all sixteen bands in the reflective and emissive bands. The calibration process includes periodic and routine views of the internal reflective and blackbody targets as well as views of space and the moon. Improvements in INR are made possible by having a Global Positioning System (GPS) on board the spacecraft and routine measurements of stars through the sensor's boresight for orbit and attitude determination through a Kalman filter. This paper describes how the sensor data are processed into calibrated and geolocated radiances that enable the generation of imagery and higher level products for both meteorological and non-meteorological Earth science applications. Some examples of ABI images and calibration are presented to demonstrate the capabilities and applications of the sensor.

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“…Special studies of the involved visible channel radiances have also been carried out within the framework of the Infrared and Visible Optical Sensors Subgroup (IVOS) of the Committee on Earth Observation Satellites (CEOS) Working Group on Calibration and Validation (WGCV, [14]). Lastly, continuous evaluation of corresponding infrared radiances is also carried out within the context of Global Space-based Intercalibration System (GSICS, [15]). Thus, the study reported here could be seen as results of a sanity check of the used radiances before applying more advanced retrieval schemes.…”

Section: Purpose and Backgroundmentioning

confidence: 99%

Multi-Sensor Calibration Studies of AVHRR-Heritage Channel Radiances Using the Simultaneous Nadir Observation Approach

Karlsson

Johansson

2014

Remote Sensing

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-18), AATSR, and MERIS channel radiances were evaluated using the simultaneous nadir (SNO) approach. Results show generally agreeing radiances within approximately 3% for channels at 0.6 µm and 0.8 µm . Larger deviations (+5%) were found for the corresponding AATSR channel at 0.6 µm. Excessive deviations but with opposite sign were also indicated for AATSR 1.6 µm and MERIS 0.8 µm radiances. Observed differences may largely be attributed to residual temporal and spatial matching differences while excessive AATSR and MERIS deviations are likely partly attributed to incomplete compensation for spectrally varying surface and atmospheric conditions. However, very good agreement was found for all infrared channels among all the studied sensors. Here, deviations were generally less than 0.2% for the measured brightness temperatures with the exception of some remaining non-linear deviations at extreme low and high temperatures.

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The Global Space-Based Inter-Calibration System

Cited by 127 publications

References 8 publications

The Accuracies of Himawari-8 and MTSAT-2 Sea-Surface Temperatures in the Tropical Western Pacific Ocean

The Accuracies of Himawari-8 and MTSAT-2 Sea-Surface Temperatures in the Tropical Western Pacific Ocean

From Photons to Pixels: Processing Data from the Advanced Baseline Imager

Multi-Sensor Calibration Studies of AVHRR-Heritage Channel Radiances Using the Simultaneous Nadir Observation Approach

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