Directional Noise Floor

Wideband vs. Narrowband• By using narrowband mode (WB1) we extend the profilingrange by about 25%. (still Broadband though)• This is the default for H-ADCP’s (vs. Wideband mode forVertical ADCP’s).• Waves Software was not explicitly programming H-ADCP’s forWideband mode, resulting in measurements that were muchmore noisy than Wideband.• This is detrimental to the array approach which is looking forphase coherency. When the signal is buried in the noise it ismuch harder to find using Array Processing.• WHAT WE CHANGED: We always program H-ADCP’s forWideband Mode!! What we give up in range can usually bemade up for by strategically positioning the instrument.• This was a nice piece of the puzzle!