Error-Reducing Atmospheric Correction System
Atmospheric Correction Systems (ACS) are technologies used to improve the performance of optical systems by reducing the effect of wavefront distortions. Current ACS use a single vertical profile to represent the atmosphere over a large region. The vertical profile used may not accurately represent the operational environment of their line of sight because the geometry for the path being collected usually travels between two different altitudes over long horizontal distances. The derived atmospheric correction introduces significant errors (>50%) in retrieved intelligence data.
Researchers at the Johns Hopkins Applied Physics Laboratory (JHU/APL) have developed an ACS capability which eliminates the significant errors inherent in current ACS approaches. This ACS accounts for the significant errors in retrieved intelligence data by constructing atmospheric profiles from data along actual target sensor slant-path range. The ACS allows the end user to subtract the radiative signature of the atmosphere from remotely sensed line-of-sight (LOS) data to reveal the pristine signature of a target. The capability uses advanced methods for assimilating multiple types of traditional weather models and observations, in addition to incorporating sensed data that are unassociated with meteorological data collection. Similarly, the ACS has a unique slant-range approach to constructing the atmospheric profile used by the radiative transfer code. The ACS approach eliminates the data uncertainty encountered when the user is forced to select atmospheric data to represent horizontally varying observations along the sensor to target LOS. The ACS is the first capability available that takes into account the horizontal variations in clouds, water vapor, or aerosols that can, and have, contributed to misleading target characteristics.
We are seeking a commercial transition licensee, focusing on non-US Government customers who require accurate, reliable and consistent information services in the form of imagery, resource management, precision agriculture, asset monitoring and other geo-analytic fields.
Patent Status: U.S. patent(s) 9,097,792 issued.
Mr. E. Chalfin
Phone: (443) 778-7473