Services Methods

Methods that provide additional functionality for working with OSIRIS level 1 data

class services.PixelParams(dy, dz, y0, z0)[source]

dy: float: Alias for field number 0

dz: float: Alias for field number 1

y0: float: Alias for field number 2

z0: float: Alias for field number 3

services.get_orbit_number(mjd)[source]: Returns the Odin orbit number for an mjd.

services.get_odin_position_eci(mjds: Sequence, attitude=None)[source]: Calculate Odin’s position for a set of mjds in ECI coordinates.

services.get_odin_velocity_eci(mjds: Sequence, attitude=None)[source]: Calculate Odin’s velocity for a set of mjds in ECI coordinates.

services.get_odin_position_ecef(mjds: Sequence, attitude=None)[source]: Calculate Odin’s position for a set of mjds in ECEF coordinates.

services.get_odin_velocity_ecef(mjds: Sequence, attitude=None)[source]: Calculate Odin’s velocity for a set of mjds in ECEF coordinates.

services.get_scannos_in_orbit_below_sza(orbit: int, sza: float, target_altitude: float = 25000)[source]

For a given orbit return an iterator of the scans whose tangent point is above a configurable horizon. Useful for retrieval code.

Parameters:

orbit (Orbit) – The orbit class handling the data retrieval, specified by orbit number
sza (float) – Reference solar zenith angle
target_altitude – Altitude to take solar zenith angle reference from, default is 25000m

class services.Level1Services(xarray_ds)[source]

property attitude: Load the corresponding satellite attitude data for the orbit.

property position_eci: Calculate satellite position of a spectrograph / IR Dataset in ECI coordinates at mid-exposure time.

property position_ecef: Calculate satellite position of a spectrograph / IR Dataset in ECEF coordinates at mid-exposure time.

property velocity_eci: Calculate satellite velocity for a spectrograph / IR Dataset in ECI coordinates at mid-exposure time.

property velocity_ecef: Calculate satellite velocity for a spectrograph / IR Dataset in ECEF coordinates at mid-exposure time.

property look_eci: Calculate spectrograph / IR look vectors in ECI coordinates.

property look_ecef: Calculate spectrograph / IR look vectors in ECEF coordinates.

property look

Calculate spectrograph / IR look vectors.

Returns the same result as look_eci.

property sza: Calculate spectrograph / IR solar zenith angle.

property ssa: Calculate spectrograph / IR solar scattering angle.

property saa: Calculate the solar azimuth angle at the OSIRIS tangent point.

property satellite_azimuth_angle: Calculate spectrograph / IR look azimuth angle.