Abstract
The Cross-track Infrared Sounder (CrIS) is a Fourier transform Michelson interferometer instrument on the Suomi National Polar-orbiting Partnership Satellite (NPP), the first in a series of next generation weather satellites in the Joint Polar Satellite System (JPSS). The NPP CrIS instrument provides radiance measurements with 1305 channels in the three bands from 650 to 1095, 1210 to 1750 and 2155 to 2550 cm-1 with resolutions of 0.625, 1.25 and 2.5 cm-1, respectively. The raw interferograms received from the instrument are transformed into calibrated radiance spectra by the CrIS Sensor Data Record (SDR) software. The SDR data will be used to improve weather forecast and understanding of climate change. NPP was launched on October 28, 2011 and the CrIS instrument was powered up on January 18, 2012. Since then, the CrIS SDR team has been working on SDR in-orbit calibration and validation (CalVal). The CalVal process includes three phases: Early Orbit Checkout (EOC), Intensive Calibration and Validation (ICV) and Long Term Monitoring (LTM). At the time when this presentation is given, the CalVal process will be in ICV. The CrIS SDR product will be provided at three stages of validation level: the Beta, Provisional and Validated. This presentation will provide an overview of the CrIS SDR CalVal process, results and the product.
Overview of Post-launch CrIS SDR Calibration and Validation
The Cross-track Infrared Sounder (CrIS) is a Fourier transform Michelson interferometer instrument on the Suomi National Polar-orbiting Partnership Satellite (NPP), the first in a series of next generation weather satellites in the Joint Polar Satellite System (JPSS). The NPP CrIS instrument provides radiance measurements with 1305 channels in the three bands from 650 to 1095, 1210 to 1750 and 2155 to 2550 cm-1 with resolutions of 0.625, 1.25 and 2.5 cm-1, respectively. The raw interferograms received from the instrument are transformed into calibrated radiance spectra by the CrIS Sensor Data Record (SDR) software. The SDR data will be used to improve weather forecast and understanding of climate change. NPP was launched on October 28, 2011 and the CrIS instrument was powered up on January 18, 2012. Since then, the CrIS SDR team has been working on SDR in-orbit calibration and validation (CalVal). The CalVal process includes three phases: Early Orbit Checkout (EOC), Intensive Calibration and Validation (ICV) and Long Term Monitoring (LTM). At the time when this presentation is given, the CalVal process will be in ICV. The CrIS SDR product will be provided at three stages of validation level: the Beta, Provisional and Validated. This presentation will provide an overview of the CrIS SDR CalVal process, results and the product.