Publications by authors named "Aisheng Wu"

The inter-comparison of MODIS reflective solar bands onboard Aqua and Terra is very important for assessment of each instrument's calibration. One of the limitations is the lack of simultaneous nadir overpasses. Their measurements over a selected Earth view target have significant differences in solar and view angles, which magnify the effects of atmospheric scattering and Bidirectional Reflectance Distribution Function (BRDF).

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Article Synopsis
  • The MODerate-resolution Imaging Spectroradiometer (MODIS) is a key Earth observation tool on the Terra and Aqua satellites, successfully operating beyond their initial design lifespans.
  • MODIS has a high duty cycle, allowing it to capture data from almost the entire Earth in under 2 days, utilizing specialized thermal bands for detailed measurements.
  • The paper evaluates calibration and noise performance using various techniques, including measuring temperature stability and noise metrics, to ensure accurate data collection from the sensor's thermal emissive bands.
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The VIIRS instrument on board the S-NPP spacecraft has successfully operated for more than four years since its launch in October, 2011. Many VIIRS environmental data records (EDR) have been continuously generated from its sensor data records (SDR) with improved quality, enabling a wide range of applications in support of users in both the operational and research communities. This paper provides a brief review of sensor on-orbit calibration methodologies for both the reflective solar bands (RSB) and the thermal emissive bands (TEB) and an overall assessment of their on-orbit radiometric performance using measurements from instrument on-board calibrators (OBC) as well as regularly scheduled lunar observations.

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