Abstract:
The Clouds and the Earth's Radiant Energy System (CERES) instrument requires in-flight calibration and validation to maintain its accuracy during orbit operations over an...Show MoreMetadata
Abstract:
The Clouds and the Earth's Radiant Energy System (CERES) instrument requires in-flight calibration and validation to maintain its accuracy during orbit operations over an extended period. An internal calibration system provides calibration for the three channels; however, there is no device for calibration of the shortwave response of the total channel. A three-channel comparison technique has been developed to calibrate the shortwave response of the total channel using the tropical oceans as a vicarious calibration target. The difference between day and night outgoing longwave radiances (OLR) averaged over the tropical oceans is used to validate the day OLR. This paper evaluates the efficacy of the technique. A relation is computed at night between the window channel radiance and the OLR retrieved from the total channel for each month for each instrument. The relation has a standard deviation of 0.28 W · m-2 · sr-1. Given 120 months of data, the precision of the curved line faired through these data is better than 0.05 W · m-2 · sr-1. A bias is found between FM-1 and FM-3 of 0.3 W · m-2 · sr-1, which is taken to be the accuracy with which the total channels can be calibrated with the internal blackbodies. This result includes the differences of longwave spectral responses of the instruments. The tropical mean OLR is between 87.4 and 90.2 W · m-2 · sr-1 at night, with a standard deviation of 0.44 for FM-1 and 0.47 W · m-2 · sr-1 for FM-3. The average difference between day and night tropical mean from the four instruments is 0.6 ± 0.09 W · m-2 · sr-1 over their data periods.
Published in: IEEE Transactions on Geoscience and Remote Sensing ( Volume: 54, Issue: 9, September 2016)
Funding Agency:
Science Systems and Applications, Inc., Hampton, VA, USA
G. Louis Smith received the B.S. degree in aeronautical engineering and the M.S. and Ph.D. degrees in aerospace engineering from the Virginia Polytechnic Institute and State University, Blacksburg, VA, USA, in 1960, 1963, and 1968.
In 1956, he started as a Cooperative Student with Langley Research Center (LaRC), where he retired as a Senior Researcher in 1997. Since then, he has been a Contractor, currently with Science Sy...Show More
G. Louis Smith received the B.S. degree in aeronautical engineering and the M.S. and Ph.D. degrees in aerospace engineering from the Virginia Polytechnic Institute and State University, Blacksburg, VA, USA, in 1960, 1963, and 1968.
In 1956, he started as a Cooperative Student with Langley Research Center (LaRC), where he retired as a Senior Researcher in 1997. Since then, he has been a Contractor, currently with Science Sy...View more
Science Systems and Applications, Inc., Hampton, VA, USA
Susan Thomas received the B.S. degree in physics from the University of Kerala, Trivandrum, India, the M.S. degree in physics from the University of Cochin, Cochin, India, and the M.S. degree in computer science from Old Dominion University, Norfolk, VA, USA.
She is currently with Science Systems and Applications, Inc., Hampton, VA, USA, as a Lead Scientist with the Center for Educational Resources (CERES) Instrument Group...Show More
Susan Thomas received the B.S. degree in physics from the University of Kerala, Trivandrum, India, the M.S. degree in physics from the University of Cochin, Cochin, India, and the M.S. degree in computer science from Old Dominion University, Norfolk, VA, USA.
She is currently with Science Systems and Applications, Inc., Hampton, VA, USA, as a Lead Scientist with the Center for Educational Resources (CERES) Instrument Group...View more
Science Directorate, Langley Research Center, Hampton, VA, USA
Kory J. Priestley received the B.S. degree in mechanical engineering from the California Polytechnic State University, San Luis Obispo, CA, USA, in 1992 and the M.S. degree in mechanical engineering and the Ph.D. degree from the Virginia Polytechnic Institute and State University, Blacksburg, VA, USA, in 1993 and 1997, respectively.
In 1995, he started as a Graduate Cooperative Student with Langley Research Center, Hampton...Show More
Kory J. Priestley received the B.S. degree in mechanical engineering from the California Polytechnic State University, San Luis Obispo, CA, USA, in 1992 and the M.S. degree in mechanical engineering and the Ph.D. degree from the Virginia Polytechnic Institute and State University, Blacksburg, VA, USA, in 1993 and 1997, respectively.
In 1995, he started as a Graduate Cooperative Student with Langley Research Center, Hampton...View more
Science Systems and Applications, Inc., Hampton, VA, USA
Dale Walikainen received the B.S., M.S., and Ph.D. degrees in physics from the University of Wisconsin-Milwaukee, Milwaukee, WI, USA, in 1981, 1984, and 1990, respectively, all in physics.
He is currently with Science Systems and Applications, Inc., Hampton, VA, USA, as a Data Analyst with the Center for Educational Resources (CERES) Instrument Group at the NASA Langley Research Center. Since 2000, he has been involved in ...Show More
Dale Walikainen received the B.S., M.S., and Ph.D. degrees in physics from the University of Wisconsin-Milwaukee, Milwaukee, WI, USA, in 1981, 1984, and 1990, respectively, all in physics.
He is currently with Science Systems and Applications, Inc., Hampton, VA, USA, as a Data Analyst with the Center for Educational Resources (CERES) Instrument Group at the NASA Langley Research Center. Since 2000, he has been involved in ...View more
Contents Science Systems and Applications, Inc., Hampton, VA, USA
G. Louis Smith received the B.S. degree in aeronautical engineering and the M.S. and Ph.D. degrees in aerospace engineering from the Virginia Polytechnic Institute and State University, Blacksburg, VA, USA, in 1960, 1963, and 1968.
In 1956, he started as a Cooperative Student with Langley Research Center (LaRC), where he retired as a Senior Researcher in 1997. Since then, he has been a Contractor, currently with Science Systems and Applications, Inc., Hampton, VA, USA. He has published numerous journal articles and many conference papers.
Dr. Smith has been a recipient of Langley's H. J. E. Reid Award for Outstanding Technical Paper published by LaRC, the NASA Medal for Exceptional Scientific Achievement, and a Group Achievement Award for the Earth Radiation Budget Study, which led to the Earth Radiation Budget Experiment Project.
G. Louis Smith received the B.S. degree in aeronautical engineering and the M.S. and Ph.D. degrees in aerospace engineering from the Virginia Polytechnic Institute and State University, Blacksburg, VA, USA, in 1960, 1963, and 1968.
In 1956, he started as a Cooperative Student with Langley Research Center (LaRC), where he retired as a Senior Researcher in 1997. Since then, he has been a Contractor, currently with Science Systems and Applications, Inc., Hampton, VA, USA. He has published numerous journal articles and many conference papers.
Dr. Smith has been a recipient of Langley's H. J. E. Reid Award for Outstanding Technical Paper published by LaRC, the NASA Medal for Exceptional Scientific Achievement, and a Group Achievement Award for the Earth Radiation Budget Study, which led to the Earth Radiation Budget Experiment Project.View more
Science Systems and Applications, Inc., Hampton, VA, USA
Susan Thomas received the B.S. degree in physics from the University of Kerala, Trivandrum, India, the M.S. degree in physics from the University of Cochin, Cochin, India, and the M.S. degree in computer science from Old Dominion University, Norfolk, VA, USA.
She is currently with Science Systems and Applications, Inc., Hampton, VA, USA, as a Lead Scientist with the Center for Educational Resources (CERES) Instrument Group at the NASA Langley Research Center. She has been involved in the CERES instrument operations, ground test and on-orbit calibration of the instruments, conversion algorithms, and validation protocol for the sensor measurements. She has published several journal and conference papers.
Ms. Thomas has received NASA Group Achievement Awards for her work on CERES instruments.
Susan Thomas received the B.S. degree in physics from the University of Kerala, Trivandrum, India, the M.S. degree in physics from the University of Cochin, Cochin, India, and the M.S. degree in computer science from Old Dominion University, Norfolk, VA, USA.
She is currently with Science Systems and Applications, Inc., Hampton, VA, USA, as a Lead Scientist with the Center for Educational Resources (CERES) Instrument Group at the NASA Langley Research Center. She has been involved in the CERES instrument operations, ground test and on-orbit calibration of the instruments, conversion algorithms, and validation protocol for the sensor measurements. She has published several journal and conference papers.
Ms. Thomas has received NASA Group Achievement Awards for her work on CERES instruments.View more
Science Directorate, Langley Research Center, Hampton, VA, USA
Kory J. Priestley received the B.S. degree in mechanical engineering from the California Polytechnic State University, San Luis Obispo, CA, USA, in 1992 and the M.S. degree in mechanical engineering and the Ph.D. degree from the Virginia Polytechnic Institute and State University, Blacksburg, VA, USA, in 1993 and 1997, respectively.
In 1995, he started as a Graduate Cooperative Student with Langley Research Center, Hampton, VA, USA, where he became an Aerospace Technologist in the Atmospheric Sciences Division in 1997. He is currently with the Science Directorate, Langley Research Center, where he is currently an Instrument Scientist of the CERES Project. He has the responsibility for the ground calibration, in-orbit operation, and calibration of the CERES instruments, including the FM-5, which has been recently launched. His work includes the generation of instrument products to be further processed into scientific data products. He has published numerous journal articles and conference papers.
Dr. Priestley was a recipient of the NASA Medal for Exceptional Achievement.
Kory J. Priestley received the B.S. degree in mechanical engineering from the California Polytechnic State University, San Luis Obispo, CA, USA, in 1992 and the M.S. degree in mechanical engineering and the Ph.D. degree from the Virginia Polytechnic Institute and State University, Blacksburg, VA, USA, in 1993 and 1997, respectively.
In 1995, he started as a Graduate Cooperative Student with Langley Research Center, Hampton, VA, USA, where he became an Aerospace Technologist in the Atmospheric Sciences Division in 1997. He is currently with the Science Directorate, Langley Research Center, where he is currently an Instrument Scientist of the CERES Project. He has the responsibility for the ground calibration, in-orbit operation, and calibration of the CERES instruments, including the FM-5, which has been recently launched. His work includes the generation of instrument products to be further processed into scientific data products. He has published numerous journal articles and conference papers.
Dr. Priestley was a recipient of the NASA Medal for Exceptional Achievement.View more
Science Systems and Applications, Inc., Hampton, VA, USA
Dale Walikainen received the B.S., M.S., and Ph.D. degrees in physics from the University of Wisconsin-Milwaukee, Milwaukee, WI, USA, in 1981, 1984, and 1990, respectively, all in physics.
He is currently with Science Systems and Applications, Inc., Hampton, VA, USA, as a Data Analyst with the Center for Educational Resources (CERES) Instrument Group at the NASA Langley Research Center. Since 2000, he has been involved in CERES instrument validations, updating production quality code, and determining monthly unfiltering coefficients.
Dale Walikainen received the B.S., M.S., and Ph.D. degrees in physics from the University of Wisconsin-Milwaukee, Milwaukee, WI, USA, in 1981, 1984, and 1990, respectively, all in physics.
He is currently with Science Systems and Applications, Inc., Hampton, VA, USA, as a Data Analyst with the Center for Educational Resources (CERES) Instrument Group at the NASA Langley Research Center. Since 2000, he has been involved in CERES instrument validations, updating production quality code, and determining monthly unfiltering coefficients.View more
