In rpkgs/hydroTools: Tools for hydrological model

library(lubridate)
library(hydroTools)
library(magrittr)
library(glue)

相关理论：

1. 东八区是指东经120度线的时间。
2. 时角，中午为0，下午为正，1小时为15°

1. 案例01

lon <- 114 + 36 / 60 + 19 / 3600
lat <- 30 + 29 / 60 + 49 / 3600

str_time <- "2022-12-12 12:35:00"
time <- as.POSIXct(str_time)

info <- suncalc(time, lon, lat)
info

2. 案例02

lon <- 114 + 36 / 60 + 19 / 3600
lat <- 30 + 29 / 60 + 49 / 3600

str_time <- "2022-12-12 14:46:00"
time <- as.POSIXct(str_time)

info <- suncalc(time, lon, lat)
info

注意： 1. 太阳的方位角和影子的方位角，相差180°。 2. 太阳方位角到正前方：逆时针则减，顺时针则加

3. Reference

1. http://ecoursesonline.iasri.res.in/mod/page/view.php?id=1625

2. https://physics.stackexchange.com/questions/491896/consistency-with-calculating-the-solar-azimuth-angle

rpkgs/hydroTools documentation built on Oct. 8, 2024, 7:47 p.m.