Abstract: A synthetic aperture radar (SAR) is operable in an interrogation mode and in a self-imaging mode, the self-imaging mode entered in response to determining a response to interrogation pulses have been received from a ground terminal and position information specifying a ground location has been received from the ground terminal. A ground terminal is operable to receive interrogation pulses transmitted by a SAR, transmit responses, and transmit position information to cause the SAR to enter a self-imaging mode. The ground terminal receives first and subsequent pulses from the SAR where subsequent pulses include backscatter and are encoded. The ground terminal generates a range line by range compression.

Abstract: A digital beamforming synthetic aperture radar (SAR) mixes a first analog signal to generate a frequency-shifted first signal having a first spectral band, mixes a second analog signal to generate a frequency-shifted second signal having a second spectral band, positioned at a defined frequency offset from the first spectral band, and positioned non-overlapping relation with the first spectral band, combines the first and second frequency-shifted signals to generate a combined analog receive signal, and band-pass samples the combined analog receive signal to generate a digital baseband signal representative of the first and second analog signals. The SAR may mix the second analog signal to position the second spectral band in the Nyquist bandwidth, and in non-overlapping relationship with the first spectral band. Mixing may include down converting the analog signal.

Abstract: Systems and methods are provided for processing and disseminating video data. A video disseminating portal is provided to show orders for video data, including status information of each order. A control in the portal is provided to launch a video display interface to preview or play an ordered video data. A video cropping tool in the video display interface allows a user to define one more areas within the ordered video data. The cropped video is generated along a pan path. In some embodiments, the cropped video is generated with variable zoom and orientation. The one or more defined areas are used to generate corresponding one or more cropped videos, which are derived from the ordered video data. The location and area of a cropped video is displayed in context of the ordered video and can be previewed using the video display interface. A cropped video is also displayed as an entry in the portal in relation to the entry for the ordered video data.

Abstract: Systems and methods are provided for processing observation data. Processes and capabilities include: obtaining images and metadata associated with the images; encoding the images and the metadata to generate encoded tiles; storing the encoded tiles in an encoded tiles database; receiving a request for a map tile; searching the encoded tiles database and obtaining the encoded tiles that are relevant to the request; merging data from the encoded tiles into the map tile; and outputting the map tile. The images and metadata may be obtained from Earth observation platforms, including satellites or aircraft. The map tiles may include spectral content, data source identification, acquisition date/time, sensor characteristics, sun angles, calibration parameters, a cloud mask, a snow mask, a land mask, a water mask, and a missing data mask.