About
13
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Introduction
Janet L. Daniels currently works at the Science Mission Directorate, NASA. Janet does research in Applied Mathematics and Analysis. Their most recent publication is 'Ensuring continuity of earth radiation budget observations initial results of CERES FM-6 on NOAA-20 (Conference Presentation)'.
Publications
Publications (13)
Six Clouds and the Earth’s Radiant Energy System (CERES) instruments on four satellites are used to produce a global continuous multi-decadal record of Earth’s radiation budget (ERB) at the top-of-atmosphere (TOA). Each CERES instrument was calibrated and characterized on the ground before launch, while post-launch calibration is conducted using on...
Some applications of data from the Clouds and the Earth's Radiant Energy System (CERES) scanning radiometer require the use of the point response function (PRF), which describes the influence of radiance from each point on the measurement. A radiance source for the measurement of the PRF of the CERES instruments was built and installed into the Rad...
The validation of in-orbit instrument performance requires both stability in calibration source and also calibration corrections to compensate for instrument changes. Unlike internal calibrations, the Moon offers an external source whose signal variance is predictable and nondegrading. This paper describes a method of validation using lunar observa...
To make measurements of the Earth's radiation budget, a pair of Clouds and the Earth's Radiant Energy System (CERES) instruments, i.e., Flight Models (FM) 1 and 2, have flown on the Terra spacecraft since December 1999, and a pair, i.e., FM-3 and FM-4, have flown on the Aqua spacecraft since June 2002. To produce accurate radiation fluxes at the to...
The Clouds and the Earth's Radiant Energy System (CERES) scanning radiometer is designed to measure the solar radiation reflected by the Earth and thermal radiation emitted by the Earth. Four CERES instruments are supporting the EOS missions; two aboard the Terra spacecraft, launched in 1999 and two aboard the Aqua spacecraft, launched in 2002. A f...
Validation of in-orbit instrument performance is a function of stability in both instrument and calibration source. This paper describes a method using lunar observations scanning near full moon by the Clouds and Earth Radiant Energy System (CERES) instruments. The Moon offers an external source whose signal variance is predictable and non-degradin...
An overview of work related to the point response function (PRF) of the Clouds and Earth Radiant Energy System (CERES) scanning radiometer is presented. The aspects of the CERES design that affect the PRF are described, and then the design of the PRF is explained. The PRF was designed by shaping the field of view so as to minimize the blur plus ali...
The point response function (PRF) describes the response of an instrument to radiance from a point within its field of
view. The Clouds and Earth Radiant Energy System (CERES) PRF is used together with measurements from the
Moderate Resolution Imaging Spectro-radiometer (MODIS) to compute cloud information for each CERES pixel.
Knowledge of the poi...
The Clouds and Earth Radiant Energy System (CERES) Flight Model 5 (FM5) instrument is scheduled to be launched this year aboard the NPP spacecraft in order to continue the Climate Data Record for Earth radiation budget. CERES data will be used together with measurements from the Visible Infra-red Imager Radiometer Suite (VIIRS) to compute cloud inf...
