| Description |
The ship was in port during these periods and the measurements may be affected by various sources (overhead cranes, anthropogenic sources, etc).
Note: Dates and times were found by looking at the NAV datastream. The standard deviation of pitch, roll, and surge velocity were used to determine when the ship was slowing down to enter port or speeding up to leave port. Thresholds used; pitch (0.01), roll (0.01), surge velocity (3.0) |
| Measurements |
- noise_figure (Receiver noise figure estimated from noise source measurements using Y-factor method.)
- polarization (Polarization mode, 0=copol, 1=xpol)
- surge_velocity (Ship surge velocity along ship length, positive forward.)
- mean_doppler_velocity (Mean Doppler velocity)
- surge_acceleration (Ship surge acceleration along ship length, positive forward)
- sway_velocity (Ship sway velocity, starboard-to-port displacement, positive to port)
- roll (Ship roll, axis along ship length, positive is port up)
- gps_heading (GPS-determined velocity vector heading angle)
- height (Range to center of measurement volume)
- signal_to_noise_ratio (Signal to noise ratio)
- lon (East longitude)
- time_offset (Time offset from base_time)
- spectral_width (Spectral width)
- heave (Ship heave displacement along vertical axis, positive upward)
- lat (North latitude)
- time (Time offset from midnight)
- base_time (Base time in Epoch)
- gps_velocity (GPS-determined velocity)
- heave_velocity (Ship heave velocity along vertical axis, positive upward)
- gps_timestamp (GPS timestamp)
- pitch (Ship pitch, axis starboard-to-port, positive is bow up)
- heave_acceleration (Ship heave acceleration along vertical axis, positive upward)
- alt (Altitude above mean sea level)
- reflectivity (Equivalent reflectivity factor)
- sway_acceleration (Ship sway acceleration starboard-to-port, positive to port)
- gain (Receiver gain estimated from noise source measurements using Y-factor method)
- noise_power_sky (Total sky noise power prior to spectrum computation)
- sway (Ship sway, starboard-to-port displacement, positive to port)
- surge (Ship surge displacement along ship length, positive forward.)
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