Figure 9-9 VLS-128 Laser Pattern
To get better precision when geo-referencing, it’s useful to precisely calculate the unique azimuth for each point by
accounting for the firing timing. These precision azimuths may be calculated/interpolated using the timing offsets shown in
Figure 9-6 on page 62
and
Figure 9-7 on page 62
.
Consider a single data packet with 12 data blocks. In single return mode this fits 3 firing sequences, each sequence taking
four consecutive data blocks. The azimuth at the top of each data block represents the azimuth reported at the moment
the first firing group of 8 lasers in the sequence was fired. Assuming the rotational speed is constant over the 53.3 µs firing
sequence, you can use the algorithm below to estimate a more precise azimuth angle for each point.
64 VLS-128 User Manual
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