67 lines
4.1 KiB
Go
67 lines
4.1 KiB
Go
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package basic
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import "math"
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const (
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riseSetWeatherMaxPressureHPa = 1200.0
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riseSetWeatherMinTemperatureC = -100.0
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riseSetWeatherMaxTemperatureC = 80.0
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)
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// validRiseSetWeather 气压与气温须落在地表可能出现的量程内。
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func validRiseSetWeather(pressureHPa, temperatureC float64) bool {
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return pressureHPa > 0 && pressureHPa <= riseSetWeatherMaxPressureHPa &&
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temperatureC >= riseSetWeatherMinTemperatureC && temperatureC <= riseSetWeatherMaxTemperatureC
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}
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type riseSetWeatherResidual func(jd, longitude, latitude, timeZone, zenithShift, height, pressureHPa, temperatureC float64, n int, inst *Instance) float64
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// riseSetWithWeather 以标准气象结果为种子，在给定气压气温下重新求解同一民用日的升落；种子失效时按分钟扫描。
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func riseSetWithWeather(seed float64, seedErr error, julianDay, longitude, latitude, timeZone, height, pressureHPa, temperatureC float64,
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isRise bool, n int, inst *Instance, residualAt riseSetWeatherResidual) (float64, error) {
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if !isFiniteFloat(julianDay) || !isFiniteFloat(longitude) || !isFiniteFloat(latitude) || !isFiniteFloat(timeZone) ||
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!isFiniteFloat(height) || !validRiseSetWeather(pressureHPa, temperatureC) {
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return 0, ErrInvalidObservationInput
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}
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civilDayStart := math.Floor(julianDay) + 0.5
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residual := func(jd float64) float64 {
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return residualAt(jd, longitude, latitude, timeZone, 1, height, pressureHPa, temperatureC, n, inst)
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}
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if seedErr == nil && isFiniteFloat(seed) {
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const derivativeStep = 0.000005
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slope := math.NaN()
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refined, ok := eventNewtonRefine(seed, 1e-7, func(jd float64) float64 {
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slope = (residual(jd+derivativeStep) - residual(jd-derivativeStep)) / (2 * derivativeStep)
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return residual(jd) / slope
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})
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if ok && math.Abs(refined-seed) < 0.02 && eventRiseSetCandidateValid(refined, civilDayStart, slope, isRise) {
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return refined, nil
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}
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}
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return eventDirectionalRiseSetSearch(civilDayStart, isRise, nil, residual)
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}
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// GetSunRiseTimeWithAtmosphere 按给定气压（hPa）与气温（°C）计算日出，口径同 GetSunRiseTimeWithInstance 开启大气修正 / sunrise with explicit pressure and temperature.
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func GetSunRiseTimeWithAtmosphere(julianDay, longitude, latitude, timeZone, height, pressureHPa, temperatureC float64, inst *Instance) (float64, error) {
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seed, err := GetSunRiseTimeWithInstance(julianDay, longitude, latitude, timeZone, 1, height, inst)
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return riseSetWithWeather(seed, err, julianDay, longitude, latitude, timeZone, height, pressureHPa, temperatureC, true, -1, inst, sunRiseSetResidualWeather)
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}
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// GetSunSetTimeWithAtmosphere 按给定气压（hPa）与气温（°C）计算日落 / sunset with explicit pressure and temperature.
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func GetSunSetTimeWithAtmosphere(julianDay, longitude, latitude, timeZone, height, pressureHPa, temperatureC float64, inst *Instance) (float64, error) {
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seed, err := GetSunSetTimeWithInstance(julianDay, longitude, latitude, timeZone, 1, height, inst)
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return riseSetWithWeather(seed, err, julianDay, longitude, latitude, timeZone, height, pressureHPa, temperatureC, false, -1, inst, sunRiseSetResidualWeather)
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}
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// GetMoonRiseTimeWithAtmosphere 按给定气压（hPa）与气温（°C）计算月出 / moonrise with explicit pressure and temperature.
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func GetMoonRiseTimeWithAtmosphere(julianDay, longitude, latitude, timeZone, height, pressureHPa, temperatureC float64, inst *Instance) (float64, error) {
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seed, err := GetMoonRiseTimeWithInstance(julianDay, longitude, latitude, timeZone, 1, height, inst)
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return riseSetWithWeather(seed, err, julianDay, longitude, latitude, timeZone, height, pressureHPa, temperatureC, true, -1, inst, moonRiseSetResidualWeather)
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}
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// GetMoonSetTimeWithAtmosphere 按给定气压（hPa）与气温（°C）计算月落 / moonset with explicit pressure and temperature.
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func GetMoonSetTimeWithAtmosphere(julianDay, longitude, latitude, timeZone, height, pressureHPa, temperatureC float64, inst *Instance) (float64, error) {
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seed, err := GetMoonSetTimeWithInstance(julianDay, longitude, latitude, timeZone, 1, height, inst)
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return riseSetWithWeather(seed, err, julianDay, longitude, latitude, timeZone, height, pressureHPa, temperatureC, false, -1, inst, moonRiseSetResidualWeather)
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}
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