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Timely, accurate, and complete metadata, as well as HDTV-enabled sensors will significantly improve not only the timeliness of PGM- quality coordinate generation (GRIDLOCK ACTD) but the quality of the data as well. The rapid, automatic geo-registration of imagery to NGA’s Digital Point Positioning Data Base (DPPDB), as developed by the GRIDLOCK ACTD, allows for the extraction of highly accurate coordinates from video imagery in times on the order of 1 minute. The GRIDLOCK process was successfully demonstrated using Global Hawk SAR imagery during JEFX04 and work is on-going to integrate Predator’s MTS into the catalog of validated sensors. GRIDLOCK’s capabilities, when enhanced by high resolution digital motion video, will provide the warfighter with the capability to provide targeting information for coordinate seeking weapons in near real time. Services and agencies
APPENDIX B – SENSORS
Page B-6
should be encouraged to initiate (continue) digital video sensor demonstration efforts with the objective of having all motion video sensors (new, replaced or repaired) produce progressive scan, digital video and standards compliant metadata. A limited operational capability is desired by as soon as possible.
Focal plane array and stabilization technologies. Small and micro UA place a premium on high performance components that make as little demand as possible on power, weight and volume. The commercial market for focal plane arrays in consumer goods has increased vastly over the last three years; the top-of-the-line digital cameras only recently reached the megapixel mark, and now stores routinely offer 5 megapixel cameras as well as handheld high definition digital video recorders.
While commercial products may emphasize only some of the spectral bands of interest for military applications, the trend toward more capable systems requiring less battery power and fitting into handheld cameras can only benefit DoD. The Services should expect vendors to capitalize on this trend and work to insure that military needs (such as infrared sensitivity, environmental tolerance, and ruggedness) are represented wherever possible.
Digitally based (single conversion on the array) technology significantly improves the quality of the information in the data chain, eliminating image degradation from repeated analog-digital-analog conversions. For this reason, multispectral versions of digital focal arrays are critical. Additionally, common focal arrays between sensors/platforms are desirable. Service (labs) should be encouraged to initiate digital multispectral still/video focal array programs with the goal of demonstrating a Predator-class high resolution digital IR system within the next few years.
As with high resolution motion video and timely and complete metadata, image stabilization is critical to obtaining usable information. Technology improvements in stabilization technology (electromechanical and electromagnetic) permit nominal sensor mounting systems to achieve stabilization accuracies in the tens of micro radians. Similarly, high end stabilization systems are capable of stabilization accuracies on the order of two micro radians, providing virtually a metric sensor capability (ability to generate precision geo-coordinates from sensor measurements when coupled with accurate High Resolution Terrain Information, taken from pre-populated databases or derived from on-board sources such as a LIDAR); however, both classes of stabilization systems are too costly to employ on lower end UA platforms (sub-Shadow class, such as XPV-1, Raven), which tend to be somewhat unstable platforms for strapdown sensors. To compensate for the lack of low cost, mechanically stabilized sensor mounts, digitally based (non-mechanical) stabilization systems have been demonstrated with limited operational success, due to human factors constraints. To fully exploit the new generation of imaging systems on the rapidly proliferating class of small/low cost platforms, specific efforts resulting in the development of a low cost, steerable (turret) sensor stabilization system for small and sub-tactical class platforms is highly desired by the Department.
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无人机系统路线图 Unmanned Aircraft Systems Roadmap(102)
