The UltraCam digital camera is a large-format, digital photogrammetric camera giving image size 1,1750 x 7,500 pixels, resulting in image dimensions comparable to an analogue image size of 23cm x 15cm. As a result of large image size the flight plan is similar to an analogue camera flight; this is a flight-economical advantage compared to small-format digital cameras. Electronic FMC (Forward Motion Compensation) enables recording of very high-resolution imagery at great flying speed. The forward overlap can be set at virtually any percentage because the data transfer rate is high; the time interval between two recordings is up to 0.75 seconds. The storage capacity in the aircraft is around 2,700 images (more than 1.5 TB). Film development and scanning are redundant, resulting in several advantages including:
Panchromatic, red, green, blue and near-infrared channels are recorded simultaneously so that a single mission suffices to produce a wide range of products for different applications, for example colour infrared for environmental inventories and true colour for real-estate mapping. The 12-bit dynamic range for every channel enables much more information to be derived from shadowed areas as compared to 8-bit scanned imagery. The camera can be used under relatively low light conditions, resulting in wider data acquisition time-windows over a day or season.
Hyper 2 Imagery – Vexcel UltraCam D
Image Product Specification
Digital Camera Sensor Unit (SU)