The D3-STAP does not require the training data at the cost of reduced subaperture
QED Technologies (QED), pioneer and provider of Magnetorheological Finishing (MRFA) polishing and Subaperture
Stitching Interferometry (SSIA) metrology platforms for the precision optics industry, announces that the Association of Universities for Research in Astronomy (AURA) has awarded QED Optics a contract to manufacture precision optics for the Daniel K.
az] is the length of subaperture
and Vs is the velocity of the SAR platform.
Prats, "First ENVISAT and ERS-2 parasitic bistatic fixed receiver SAR images processed with the subaperture
range-Doppler algorithm," IGARSS, 1840-1843, 2006.
has developed the Subaperture
Stitching Interferometer for Aspheres (SSI-A), a six-axis, computer-controlled interferometric workstation that marks a first in the optics industry.
The MR fluid is delivered to the rotating wheel, pulled against the wheel's velocity and becomes a subaperture
Its unique optical design utilizes a subaperture
meniscus corrector lens in front of the secondary mirror to produce a large imaging field free from optical aberrations at f/11.
Because the speckles distribute randomly, they can be restrained by the non-coherent accumulation of multiple subaperture
Shi, "Fast 3-D microwave imaging method based on subaperture
approximation," Progress In Electromagnetics Research, Vol.
Compared to other solutions to overcome the aliased Doppler spectra, the use of subaperture
is a simple and efficient method.
Like some previous Tele Vue refractors, the NP 101 is a four-element design with a full-aperture doublet objective up front and subaperture
doublet near the back.