Difference between revisions of "TrueWind"

Revision as of 08:53, 30 October 2018

AWA Apparent Wind Angle (relative to H) environment.wind.angleApparent
H Heading (relative to true north) navigation.headingTrue
- AWD Apparent Wind Direction (relative to true north) environment.wind.directionTrue
- AWD = MOD(H+AWA;360)

AWS Apparent Wind Speed environment.wind.speedApparent
COG Course Over Ground navigation.courseOverGroundTrue
SOG Speed Over Ground navigation.speedOverGround
- TWS True Wind Speed (relative to ground) environment.wind.speedOverGround
- TWx = SOG * Sin (COG) - AWS * Sin (AWD)
- TWy = SOG * Cos (COG) - AWS * Cos (AWD)
- TWS= SQRT (TWx*TWx + TWy*TWy)
- TWD True Wind Direction (relative to true north) ???
- TWD = ATAN ( TWx / TWy )
STW Speed Trough Water navigation.speedThroughWater
- DFT Current Drift (speed relative to ground) environment.current.drift
- DFTx = SOG * Sin (COG) - STW * Sin (H)
- DFTy = SOG * Cos (COG) - STW * Cos (H)
- DFT= SQRT (DFTx*DFTx + DFTy*DFTy)
- SET Current Set (direction relative to true north) environment.current.setTrue
- SET = ATAN ( DFTx / DFTy )

COG Course Over Ground navigation.courseOverGroundTrue
SOG Speed Over Ground navigation.speedOverGround
AWA Apparent Wind Angle (relative to H) environment.wind.angleApparent
AWS Apparent Wind Speed environment.wind.speedApparent
- AWx = AWS * Cos (AWA)
- AWy = AWS * Sin (AWA)
- TWA True Wind Angle (relative to H) environment.wind.angleTrueGround
- ATAN2(AWy, -SOG + AWx)
- TWS True Wind Speed (relative to ground) environment.wind.speedOverGround
- SQRT (POWER(AWy,2) POWER(-SOG + AWx,2))

@@ Line 38: / Line 38: @@
 * https://coaps.fsu.edu/woce/truewind/paper/index.html
+== Sensors ==
+* [https://en.wikipedia.org/wiki/Compass#Magnetic_compass magnetic compass]
+** H magnetic
+** H true = H magnetic + [https://en.wikipedia.org/wiki/Magnetic_declination Magnetic declination]
+* [https://en.wikipedia.org/wiki/Fluxgate_compass Fluxgate compass]
+** H magnetic
+** H true = H magnetic + [https://en.wikipedia.org/wiki/Magnetic_declination Magnetic declination]
+* [https://en.wikipedia.org/wiki/Gyrocompass Gyrocompass]
+** H true
+* moving baseline [https://en.wikipedia.org/wiki/Real-time_kinematic Real-time kinematic] (GPS)
+** H true
+** SOG
+** COG
+* GPS receiver (simple)
+** SOG
+** COG
+* [https://en.wikipedia.org/wiki/Chip_log#More_modern_logs_and_replacements paddle-wheel]
+** STW
+* [https://en.wikipedia.org/wiki/Weather_vane wind-vane]
+** AWA
+* [https://en.wikipedia.org/wiki/Anemometer anemometer]
+** AWS
 [[category:Projekte]]