poliastro.core.sensors

Module Contents

Functions

min_and_max_ground_range(h, η_fov, η_center, R)	Calculates the minimum and maximum values of ground-range angles.
ground_range_diff_at_azimuth(h, η_fov, η_center, β, φ_nadir, λ_nadir, R)	Calculates the difference in ground-range angles from the η_center angle and the latitude and longitude of the target

poliastro.core.sensors.min_and_max_ground_range(h, η_fov, η_center, R)

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

Parameters

• h (float) – Altitude over surface.

• η_fov (float) – Angle of the total area that a sensor can observe.

• η_center (float) – Center boresight angle.

• R (float) – Attractor equatorial radius.

Returns

• Λ_min (float) – Minimum value of latitude and longitude.

• Λ_max (float) – Maximum value of latitude and longitude.

Notes

For further information, please take a look at “Fundamentals of Astrodynamics and Applications”, 4th ed (2013)” by David A. Vallado, pages 853-860.

poliastro.core.sensors.ground_range_diff_at_azimuth(h, η_fov, η_center, β, φ_nadir, λ_nadir, R)

Calculates the difference in ground-range angles from the η_center angle and the latitude and longitude of the target for a desired phase angle, β, used to specify where the sensor is looking.

Parameters

• h (float) – Altitude over surface.

• η_fov (float) – Angle of the total area that a sensor can observe.

• η_center (float) – Center boresight angle.

• β (float) – Phase angle, used to specify where the sensor is looking.

• φ_nadir (float) – Latitude angle of nadir point.

• λ_nadir (float) – Longitude angle of nadir point.

• R (float) – Earth equatorial radius.

Returns

• delta_λ (float) – The difference in ground-range angles from the eta_center angle.

• φ_tgt (float) – Latitude angle of the target point.

• λ_tgt (float) – Longitude angle of the target point.

Notes

For further information, please take a look at “Fundamentals of Astrodynamics and Applications”, 4th ed (2013)” by David A. Vallado, pages 853-860.