Abstract: A modular distortion correcting real-time SSM/I imagery decommutator applies earth curvature corrections to operational line scan (OLS) and special sensor meteorological image (SSM/I) data which is generated by OLS and SSM/I sensors on board a Defense Meteorological Satellite Program (DMSP) satellite scanning the earth's surface. The OLS image data is resampled to remove a number of image pixels near the center of a scan line and to interpolate additional pixels toward the edge of the scan line. The SSM/I data is resampled to remove long track and cross track distortions caused by the SSM/I sensor scan angle. The resampled SSM/I data is then adjusted to compensate for the scan position of the SSM/I sensor. The OLS data image from the OLS sensor and at least one environmental data record (EDR) image obtained from the SSM/I sensor, for a particular geolocation, are displayed by embedding at least one EDR image into the OLS data image to produce a single combined image which can then be displayed.

Abstract: A data decommutator architecture for decommutating an input data stream has a sync correlator section for synchronizing the input data stream including a sync code correlator formed of a first field programmable gate array allowing the sync code correlator to be programmed for synchronizing different data formats. A data storage buffer, having two storage banks is coupled to the sync code correlator for receiving sync data, correlator address and correlator write signals. A data decommutator section is provided for decommutating the data received from the data storage buffer. The data decommutator section includes a serial to parallel conversion circuit formed of a second field programmable gate array and a primary decommutating transputer. The second field programmable gate array is programmable to allow decommutation of different data formats.