What it means
A pulse analyzer is an unremarkable device similar to an oscilloscope for gathering information about signals that exhibit some sort of repetitive regular structure or pattern.
The signal is a 3,000 MHz (3.0 GHz) signal that occurs in pulses lasting 2 microseconds each at intervals of 1/600 second. Looks to me like an S-band search radar.
What kind of vehicle would emit such a signal?
Any of a number of ordinary Earth vehicles fitted with off-the-shelf radar technology for search or altimetry purposes.
There is nothing remarkable about the signal. As to the correspondence among the signal and the other observations -- are we sure they're connected?
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