Struct marlu::pos::xyz::XyzGeodetic

pub struct XyzGeodetic {
    pub x: f64,
    pub y: f64,
    pub z: f64,
}

The geodetic (x,y,z) coordinates of an antenna (a.k.a. tile or station). All units are in metres.

This coordinate system is discussed at length in Interferometry and Synthesis in Radio Astronomy, Third Edition, Section 4: Geometrical Relationships, Polarimetry, and the Measurement Equation.

Fields

x: f64

x-coordinate [meters]

y: f64

y-coordinate [meters]

z: f64

z-coordinate [meters]

Implementations

impl XyzGeodetic

pub fn to_enh(self, latitude: f64) -> ENH

Convert XyzGeodetic coordinates at a latitude to ENH coordinates.

pub fn to_enh_inner(self, sin_latitude: f64, cos_latitude: f64) -> ENH

Convert XyzGeodetic coordinates at a latitude to ENH coordinates. This function is less convenient than XyzGeodetic::to_enh(), but is slightly more efficient because the caller can prevent needless sin and cos calculations.

pub fn to_enh_mwa(self) -> ENH

Convert XyzGeodetic coordinates at the MWA’s latitude to ENH coordinates.

pub fn to_geocentric(
    self,
    earth_pos: LatLngHeight
) -> Result<XyzGeocentric, ErfaError>

Convert a XyzGeodetic coordinate to XyzGeocentric.

pub fn to_geocentric_inner(
    self,
    geocentric_vector: XyzGeocentric,
    sin_longitude: f64,
    cos_longitude: f64
) -> XyzGeocentric

Convert a XyzGeodetic coordinate to XyzGeocentric. This function is less convenient than XyzGeodetic::to_geocentric, but may be better in tight loops as the arguments to this function don’t need to be uselessly re-calculated.

pub fn to_geocentric_mwa(self) -> Result<XyzGeocentric, ErfaError>

Convert a XyzGeodetic coordinate to XyzGeocentric, using the MWA’s location.

pub fn get_tiles(
    context: &MetafitsContext,
    latitude_rad: f64
) -> Vec<XyzGeodetic>

For each tile listed in an mwalib::MetafitsContext, calculate a XyzGeodetic coordinate.

Note that the RF inputs are ordered by antenna number, not the “input”; e.g. in the metafits file, Tile104 is often the first tile listed (“input” 0), Tile103 second (“input” 2), so the first baseline would naively be between Tile104 and Tile103.

pub fn get_tiles_mwa(context: &MetafitsContext) -> Vec<XyzGeodetic>

For each tile listed in an mwalib::MetafitsContext, calculate a XyzGeodetic coordinate assuming the MWA’s latitude.

Note that the RF inputs are ordered by antenna number, not the “input”; e.g. in the metafits file, Tile104 is often the first tile listed (“input” 0), Tile103 second (“input” 2), so the first baseline would naively be between Tile104 and Tile103.

Trait Implementations

impl Clone for XyzGeodetic

fn clone(&self) -> XyzGeodetic

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for XyzGeodetic

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

Formats the value using the given formatter.

impl Default for XyzGeodetic

fn default() -> XyzGeodetic

Returns the “default value” for a type.

impl PartialEq<XyzGeodetic> for XyzGeodetic

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Sub<XyzGeodetic> for XyzGeodetic

type Output = Self

The resulting type after applying the - operator.

fn sub(self, rhs: Self) -> Self

Performs the - operation.

impl Copy for XyzGeodetic

impl StructuralPartialEq for XyzGeodetic