为从signalk值派生的值生成增量_lille-oe_curiosity_下载.zip

# signalk-derived-data [](https://greenkeeper.io/) Generates deltas for values derived from signalk values It currently calculates: * Outside air density (based on humidity, temperature and pressure) * Battery Power * Depth Below Keel (based on depth.belowSurface and design.draft.maximum) * Depth Below Keel (based on depth.belowTransducer and depth.transducerToKeel) * Depth Below Surface (based on depth.belowKeel and design.draft.maximum) * Distance To Go (based on courseGreatCircle.nextPoint.position) * Outside air dew point (based on humidity and temperature) * Fuel economy (based on speed over ground, fuel rate) * Propeller Slip calculation (requires defaults.json to include propulsion.\*.drive.propeller.pitch and propulsion.\*.transmission.gearRatio) * Sets environment.sun to dawn, sunrise, day, sunset, dusk or night (based on navigation.datetime or system time and navigation.position) * Tank Volume (based on currentLevel (requires calibration pairs (>2 for parallell sides, >3 for straight wedge and >4 for more complex shapes)) * Velocity Made Good to Course (based on courseGreatCircle.nextPoint.bearingTrue heading true and speedOverGround) * Velocity Made Good to wind (based on wind.directionTrue and speedOverGround) * Set and Drift (based on headingMagnetic, courseOverGroundTrue, speedThroughWater, speedOverGround, magneticVariation) * Outside air wind chill (based on wind speed and temperature) * True Wind Angle, Direction and Speed (based on speed through water, AWA and AWS) * True Wind Direction (based on AWA and headingTrue) * Ground Wind Angle and Speed (based on SOG, AWA and AWS) * Magnetic Wind Direction (based on AWA and headingMagnetic) * Magnetic Wind Direction (based on wind.directionTrue and magneticVarition) * Wind Shift (experimental) * Moon illumination and times (based on time and navigation.position) * Sunlight Times: sunrise, sunriseEnd, goldenHourEnd, solarNoon, goldenHour, sunsetStart, sunset, dusk, nauticalDusk, night, nadir, nightEnd, nauticalDawn, dawn (based on time and navigation.position) * Outside Heat Index (based on temperature and humidity) * True Course Over Goround (based on courseOverGroundMagnetic and magneticVariation) * Magnetic Course Over Ground (based on courseOverGroundTrue and magneticVariation) To add new calculations, just create a new file under the `./calcs` directory. For example. This is the VMG calculator. ``` module.exports = function(app) { return { group: 'vmg', optionKey: 'vmg', title: "Velocity Made Goog (based on courseGreatCircle.nextPoint.bearingTrue heading true and speedOverGround)", derivedFrom: [ "navigation.courseGreatCircle.nextPoint.bearingTrue", "navigation.headingTrue", "navigation.speedOverGround" ], calculator: function (bearingTrue, headingTrue, speedOverGround) { var angle = Math.abs(bearingTrue-headingTrue) return [{ path: "navigation.courseGreatCircle.nextPoint.velocityMadeGood", value: Math.cos(bearingTrue-headingTrue) * speedOverGround}] } }; } ```