missionbay2: Mission Bay navigation trials.
Description
Data from calibrated field trials in Mission Bay, CA.Format
A data frame with 3,020 observations on the following 27 variables.
date- a Date
time- a POSIXlt
year- year
month- month
day- day
hour- hour
minute- minute
second- second
speed- calibrated speed (meters per second)
depth- depth (meters)
mx_raw- a numeric vector of magnetometer X-axis values (in bits)
my_raw- a numeric vector of magnetometer Y-axis values (in bits)
mz_raw- a numeric vector of magnetometer Z-axis values (in bits)
ax_raw- a numeric vector of accelerometer X-axis values (in bits)
ay_raw- a numeric vector of accelerometer Y-axis values (in bits)
az_raw- a numeric vector of accelerometer Z-axis values (in bits)
mx_scaled- a numeric vector of calibrated magnetometer X-axis values scaled from -1 to +1
my_scaled- a numeric vector of calibrated magnetometer Y-axis values scaled from -1 to +1
mz_scaled- a numeric vector of calibrated magnetometer Z-axis values scaled from -1 to +1
ax_scaled- a numeric vector of calibrated accelerometer X-axis values scaled from -1 to +1
ay_scaled- a numeric vector of calibrated accelerometer Y-axis values scaled from -1 to +1
az_scaled- a numeric vector of calibrated accelerometer Z-axis values scaled from -1 to +1
roll- roll values in radians ($-\pi$ to $+\pi$)
pitch- pitch values in radians ($-\pi/2$ to $+\pi/2$)
heading_mag- magnetic heading direction in radians ($0 - 2\pi$)
heading_geo- geographic heading (corrected for declination) direction in radians ($0 - 2\pi$)
trial- trial number, 1-4
Source
These data were recorded with great seamanship by Bill Hagey and Randall DavisDetails
Four trials were conducted in which an instrument that was recording
speed, magnetic fields, acceleration, depth, and time was towed behind a boat to a series of known locations. During each
trial, the boat returned to the starting location after a short trip.