Research Article
Stacked Autoencoders for Outlier Detection in Over-the-Horizon Radar Signals
Algorithm 1
The proposed algorithm in pseudocode.
Input: OTH and AIS trajectories and other provided information for a set of past time instances | Output: matrix of the closest AIS entries to each OTH entry for a set of past time instances | FOR each time instance | FOR each tracked ship , | FOR each AIS transmitting ship | Check difference in track time and AIS transmission time | Find corresponding time instances | IF | No AIS entry is matched to | ELSE | Run nn search using coordinates among and | Maintain 4 closest entries | END | END | END | END | Input: matrix of the closest AIS entries to each OTH entry for a set of past time instances | Output: array with indices of the matched AIS to each one of the OTH tracked vehicles | Initialize matrix FOR the votes | FOR each OTH tracked ship | FOR each time instance | IF ship had ship in the vicinity | | END | END | END | WHILE AIS vessels remain unmatched | | IF | KEEP AIS entry closest to OTH vehicle | END | Update | END |
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