marss 0.0.3

Mars celestial simulation crate for the MilkyWay SolarSystem workspace
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum Season {
    NorthernSpring,
    NorthernSummer,
    NorthernAutumn,
    NorthernWinter,
}

pub struct SeasonalState {
    pub ls_deg: f64,
    pub season_north: Season,
    pub season_south: Season,
    pub solar_declination_deg: f64,
    pub sub_solar_latitude_deg: f64,
}

pub fn season_at(ls_deg: f64) -> SeasonalState {
    let ls = ls_deg % 360.0;
    let season_north = match ls {
        l if l < 90.0 => Season::NorthernSpring,
        l if l < 180.0 => Season::NorthernSummer,
        l if l < 270.0 => Season::NorthernAutumn,
        _ => Season::NorthernWinter,
    };
    let season_south = match season_north {
        Season::NorthernSpring => Season::NorthernAutumn,
        Season::NorthernSummer => Season::NorthernWinter,
        Season::NorthernAutumn => Season::NorthernSpring,
        Season::NorthernWinter => Season::NorthernSummer,
    };
    let decl = super::solar_position::solar_declination_deg(ls_deg);

    SeasonalState {
        ls_deg: ls,
        season_north,
        season_south,
        solar_declination_deg: decl,
        sub_solar_latitude_deg: decl,
    }
}

pub fn northern_vernal_equinox_ls() -> f64 {
    0.0
}
pub fn northern_summer_solstice_ls() -> f64 {
    90.0
}
pub fn northern_autumnal_equinox_ls() -> f64 {
    180.0
}
pub fn northern_winter_solstice_ls() -> f64 {
    270.0
}

pub fn perihelion_ls() -> f64 {
    251.0
}
pub fn aphelion_ls() -> f64 {
    71.0
}

pub fn irradiance_season_ratio() -> f64 {
    let e = crate::ECCENTRICITY;
    let ratio = (1.0 + e) / (1.0 - e);
    ratio * ratio
}

pub fn dust_storm_season_start_ls() -> f64 {
    180.0
}
pub fn dust_storm_season_end_ls() -> f64 {
    360.0
}

pub fn is_dust_storm_season(ls_deg: f64) -> bool {
    let ls = ls_deg % 360.0;
    ls >= 180.0
}