Monitoring Orbital Precession of EO-1 Hyperion With Three Atmospheric Correction Models in the Libya-4 PICS

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Monitoring_Orbital_Precession_of_EO-1_Hyperion_With_Three_Atmospheric_Correction_Models_in_the_Libya-4_PICS.pdf (1.84 MB)

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https://ieeexplore.ieee.org/document/7589985

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https://doi.org/10.1109/LGRS.2016.2612539
 http://hdl.handle.net/11603/28575

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UMBC Joint Center for Earth Systems Technology (JCET)
UMBC Faculty Collection
UMBC Geography and Environmental Systems Department
UMBC GESTAR II

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Author/Creator ORCID

https://orcid.org/0000-0002-0505-4951

Date

2016-10-13

Type of Work

journal articles
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Citation of Original Publication

C. S. R. Neigh et al., "Monitoring Orbital Precession of EO-1 Hyperion With Three Atmospheric Correction Models in the Libya-4 PICS," in IEEE Geoscience and Remote Sensing Letters, vol. 13, no. 12, pp. 1797-1801, Dec. 2016, doi: 10.1109/LGRS.2016.2612539.

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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract

Spaceborne 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 pseudoinvariant calibration site (PICS), this resulted in a progressive shift from a mean local equatorial crossing time of ~10:00 A.M. in 2011 to ~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 <;5% in the visible near infrared (VNIR) and <;10% 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 ² ) in VNIR from 0.25 to 0.94 and in SWIR from 0.12 to 0.88 (p <; 0.01). The uncertainties in all the models increased with a terrain slope up to 15° 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.