Pre-Launch Radiometric Characterization of JPSS-1 VIIRS Thermal Emissive Bands

Jeff McIntire, David Moyer, Hassan Oudrari, Xiaoxiong Xiong
2016 Remote Sensing  
Pre-launch characterization and calibration of the thermal emissive spectral bands on the Joint Polar Satellite System (JPSS-1) Visible Infrared Imaging Radiometer Suite (VIIRS) is critical to ensure high quality data products for environmental and climate data records post-launch. A comprehensive test program was conducted at the Raytheon El Segundo facility in 2013-2014, including extensive environmental testing. This work is focused on the thermal band radiometric performance and stability,
more » ... ncluding evaluation of a number of sensor performance metrics and estimation of uncertainties. Analysis has shown that JPSS-1 VIIRS thermal bands perform very well in relation to their design specifications, and comparisons to the Suomi National Polar-orbiting Partnership (SNPP) VIIRS instrument have shown their performance to be comparable. on-orbit thermal band calibration; and a view of the solar diffuser at about 159 degrees off nadir, used for reflective band calibration on-orbit. The RTA directs the light onto a two-sided rotating fold mirror, known as the half angle mirror (HAM). The HAM, rotating at half the speed of the RTA, de-rotates the light beam and directs it into the fixed aft-optics. The light entering the aft-optics passes through a fold mirror, a four mirror anastigmat, and two dichroic beamsplitters. The first beamspitter reflects the visible and near-infrared light onto a focal plane assembly (FPA), while longer wavelengths pass through to the second dichroic beamsplitter. The second beamsplitter separates the short and mid-wave infrared (∼1-7 µm) from the long-wave infrared (∼7-16 µm), and directs the light onto two separate FPAs (via a steering mirror for the short and mid-wave infrared). Both of these FPAs will be cryogenically controlled at about 80.5 K on-orbit by means of a three-stage radiative cooler.
doi:10.3390/rs8010047 fatcat:bcbkezhrrreorm4bzvhemlfvhe