Struct MetarObservation 

#[non_exhaustive]
pub struct MetarObservation {
    pub temperature_c: Option<f64>,
    pub dewpoint_c: Option<f64>,
    pub wind_dir_deg: Option<u16>,
    pub wind_variable: bool,
    pub wind_speed_kt: Option<u16>,
    pub wind_gust_kt: Option<u16>,
    pub visibility_sm: Option<f64>,
    pub altimeter_hpa: Option<f64>,
    pub clouds: Vec<CloudLayer>,
    pub reported_category: Option<FlightCategory>,
}

A decoded METAR observation. Every field is optional: a real report may omit any of them, and a caller must treat absence as “unknown”, never as a safe default.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

temperature_c: Option<f64>

Air temperature, °C.

dewpoint_c: Option<f64>

Dewpoint, °C.

wind_dir_deg: Option<u16>

Wind direction, degrees true; None when variable or unreported.

wind_variable: bool

Whether the wind direction is reported variable (VRB).

wind_speed_kt: Option<u16>

Sustained wind speed, knots.

wind_gust_kt: Option<u16>

Gust speed, knots.

visibility_sm: Option<f64>

Prevailing visibility, statute miles. "10+" decodes to 10.0.

altimeter_hpa: Option<f64>

Altimeter setting, hectopascals (the AWC source unit).

clouds: Vec<CloudLayer>

Cloud layers, lowest first as reported.

reported_category: Option<FlightCategory>

The category AWC itself reported (fltCat), for cross-checking against Self::flight_category.

Implementations

impl MetarObservation

pub fn new() -> Self

An empty observation; fill it with the with_* setters.

pub fn ceiling_ft(&self) -> Option<f64>

Lowest ceiling base with a known, finite height (broken / overcast / obscured), feet AGL. None when no ceiling layer has a known height — which may mean unlimited or a ceiling whose height was not reported; use Self::has_unknown_height_ceiling to tell them apart.

pub fn has_unknown_height_ceiling(&self) -> bool

Whether a ceiling layer (broken/overcast/obscured) is present but its height is missing or non-finite. Such a ceiling must never be read as “unlimited”: the true ceiling could be at any height.

pub fn flight_category(&self) -> Option<FlightCategory>

Flight category derived from Self::ceiling_ft and Self::visibility_sm — the source of truth for a go/no-go check, independent of AWC’s reported value.

Returns None (uncategorizable) when visibility is unknown, or when a ceiling layer of unknown height could be lower than anything known and the result is not already the most restrictive category. A go/no-go caller must treat None conservatively, never as VFR.

pub fn altimeter_inhg(&self) -> Option<f64>

Altimeter setting converted to inches of mercury.

pub fn with_temperature_c(self, value: Option<f64>) -> Self

Set the temperature (°C).

pub fn with_dewpoint_c(self, value: Option<f64>) -> Self

Set the dewpoint (°C).

pub fn with_wind_dir(self, deg: Option<u16>, variable: bool) -> Self

Set the wind direction (degrees true) and whether it is variable.

pub fn with_wind_speed( self, speed_kt: Option<u16>, gust_kt: Option<u16>, ) -> Self

Set the wind speed and gust (knots).

pub fn with_visibility_sm(self, value: Option<f64>) -> Self

Set the prevailing visibility (statute miles).

pub fn with_altimeter_hpa(self, value: Option<f64>) -> Self

Set the altimeter setting (hectopascals).

pub fn with_clouds(self, clouds: Vec<CloudLayer>) -> Self

Set the cloud layers.

pub fn with_reported_category(self, value: Option<FlightCategory>) -> Self

Set AWC’s reported category.

Trait Implementations

impl Clone for MetarObservation

fn clone(&self) -> MetarObservation

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MetarObservation

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for MetarObservation

fn default() -> MetarObservation

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MetarObservation

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for MetarObservation

fn eq(&self, other: &MetarObservation) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for MetarObservation

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MetarObservation