NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Monitoring Orbital Precession of EO-1 Hyperion With Three Atmospheric Correction Models in the Libya-4 PICSSpaceborne spectrometers require spectral-temporal stability characterization to aid in validation of derived data products. Earth Observation 1 (EO-1) began orbital precession in 2011 after exhausting onboard fuel resources. In the Libya-4 pseudo-invariant calibration site (PICS), this resulted in a progressive shift from a mean local equatorial crossing time of approximately10:00 A.M. in 2011 to approximately 8:30 A.M. in late 2015. Here, we studied precession impacts to Hyperion surface reflectance products using three atmospheric correction approaches from 2004 to 2015. Combined difference estimates of surface reflectance were less than 5 percent in the visible near infrared (VNIR) and less than 10 percent for most of the shortwave infrared (SWIR). Combined coefficient of variation estimates in the VNIR ranged from 0.025 to 0.095, and in the SWIR it ranged from 0.025 to 0.06, excluding bands near atmospheric absorption features. Reflectances produced with different atmospheric models were correlated (R squared) in VNIR from 0.25 to 0.94 and in SWIR from 0.12 to 0.88 (p value (calculated probability) less than 0.01). The uncertainties in all the models increased with a terrain slope up to 15 degrees and selecting dune flats could reduce errors. We conclude that these data remain a valuable resource over this period for sensor intercalibration despite orbital decay.
Document ID
20170003063
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Neigh, Christopher S. R.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
McCorkel, Joel
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Campbell, Petya K. E.
(Maryland Univ. Greenbelt, MD, United States)
Ong, Lawrence
(Science Systems and Applications, Inc. Greenbelt, MD, United States)
Ly, Vuong
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Landis, David
(Global Science and Technology, Inc. Greenbelt, MD, United States)
Middleton, Elizabeth M.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
April 6, 2017
Publication Date
October 13, 2016
Publication Information
Publication: IEEE Geoscience and Remote Sensing Letters
Publisher: IEEE
Volume: 13
Issue: 12
ISSN: 1545-598X
e-ISSN: 1558-0571
Subject Category
Instrumentation And Photography
Earth Resources And Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN40830
Funding Number(s)
CONTRACT_GRANT: NNG15HQ01C
CONTRACT_GRANT: NNX15AT34A
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available