Adaptive Infrared Imaging Spectroradiometer (AIRIS)

The Challenge

The need for multispectral sensing. (This process was application rather than technology driven. ItŐs also a hallmark of the PSI Process because it involved the same science and engineering team from concept development through field testing and data analysis.)

The PSI Process

In the initial stages of application development, the need for multispectral sensing to address the problem is analyzed and defined conceptually.

This problem definition is then transitioned to simulation and modeling, where the phenomenology of signature generation and radiative transport is coupled to a model of sensor performance. Different sensor configurations are then explored to optimize performance with respect to well defined metrics such as radiance noise, discrimination capability, and probability of detection/false detection.

Optimal sensor configurations are developed as laboratory/field prototypes for testing and concept validation. This process includes preliminary and critical design reviews, fabrication, and test and integration. Engineering designs are checked against the sensor model during design/development and performance during test and integration is compared with model predictions. Algorithms are developed that reflect the signatures to be exploited, as defined by the signature model. Initial testing is conducted in a laboratory setting using specifically designed test configurations and subsequently extended to local field tests.

The final stage of sensor development is validation in field tests under actual use conditions applying accurate signatures. These tests are typically conducted at government facilities under the sponsorŐs supervision. PSI will conduct the tests, produce high-level data products, analyze the signature data with respect to the signature generation model, and make predictions for sensor performance under alternate deployment situations as well as develop approaches to improve sensor performance. This process may continue for several cycles as both the sensor and interface are optimized for the application.

The Result

The Adaptive Infrared Imaging Spectroradiometer (AIRIS) has been successfully transitioned from its sensor concept demonstration phase to the point where we are developing application-specific configurations for a range of commercial and military customers.