poliastro2.sensor.sensors_math

Functions

ground_range_diff_at_azimuth(altitude, fov, ...)

Calculate the difference in ground-range angles.

min_and_max_ground_range(altitude, fov, ...)

Calculate the minimum and maximum values of ground-range angles.
poliastro2.sensor.sensors_math.ground_range_diff_at_azimuth(altitude, fov, boresight, azimuth, nadir_lat, nadir_lon, R)

Calculate the difference in ground-range angles.

Use the boresight angle, the latitude and longitude of the target, and the desired azimuth (which directs where the sensor is looking).

Parameters:

  • altitude (Quantity) – Altitude over surface.

  • fov (Quantity) – Angle of the total area that a sensor can observe.

  • boresight (Quantity) – Center boresight angle.

  • azimuth (Quantity) – Azimuth angle, used to specify where the sensor is looking.

  • nadir_lat (Quantity) – Latitude angle of nadir point.

  • nadir_lon (Quantity) – Longitude angle of nadir point.

  • R (Quantity) – Attractor equatorial radius.

Returns:

  • ground_range_diff (~astropy.units.Quantity) – The difference in ground-range angles from the boresight angle.

  • target_lat (~astropy.units.Quantity) – Latitude angle of the target point.

  • target_lon (~astropy.units.Quantity) – Longitude angle of the target point.

Raises:

ValueError – This formula always gives the answer for the short way to the target of the acute azimuth angle, which must be greater or equal than 0º and less than 180º.

poliastro2.sensor.sensors_math.min_and_max_ground_range(altitude, fov, boresight, R)

Calculate the minimum and maximum values of ground-range angles.

Parameters:

  • altitude (Quantity) – Altitude over surface.

  • fov (Quantity) – Angle of the total area that a sensor can observe.

  • boresight (Quantity) – Center boresight angle.

  • R (Quantity) – Attractor equatorial radius.

Returns:

  • lat_lon_min (~astropy.units.Quantity) – Minimum value of latitude and longitude.

  • lat_lon_max (~astropy.units.Quantity) – Maximum value of latitude and longitude.