GPS Assist: A radar-video solution to compensate for loss, spoofing or jamming of GPS information скачать в хорошем качестве

GPS Assist: A radar-video solution to compensate for loss, spoofing or jamming of GPS information

GPS Assist works with existing maritime radars. The ship’s normal processing and display of the radar data is unaffected by GPS Assist, which simply piggybacks on to the data stream to process the radar video. The radar video is scan converted to an image which is then compared to a predicted radar image derived from a terrain database. The prediction process uses terrain and coastline information to create a predicted radar image. This predicted image is compared with the actual radar image and an alignment process adjusts the real data to match with the predicted data. The error between observed and predicted positions is used to adjust the estimated position of the ship. GPS Assist takes standard NMEA-0183 navigation data as an input and continually compares the reported GPS position with the estimated position. If a significant error is detected, the incoming GPS stream is suspected to be missing, spoofed or jammed. At this point, GPS Assist can simply generate an alarm to permit another sub-system to handle the consequences, or else GPS Assist can generate its own stream of NMEA-0183 data with corrected navigation data. more info at: https://cambridgepixel.com/products/t...