Path: SpacecraftEstimation/OpticalNavigation
% Selects landmark targets for an optical navigation system.
The idea is to pick 3 stars and 3 landmarks on each pass.
This way the errors are randomized. The total number of measurements
from this set is 11. There are 2 landmark/landmark angles and 9
landmark/star angles.
The algorithm assumes that all landmarks are visible.
The algorithm picks 2 stars that are close to the moon and one that is near
the +z ECI axis. It picks 3 landmarks from rLCatalog randomly every
time it is called. This function uses MoonV2 for the moon ephemeris.
It randomly selects the pole star from the set within the field of
view.
Since version 9.
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Form:
NavTargetTrackingLunar;
[uS, rL] = NavTargetTrackingLunar( x, uSCatalog, rLCatalog, jD, fOV )
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Inputs
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x (:,1) ECI position of sensor [r;...]
uSCatalog (3,:) Star unit vectors
rLCatalog (3,:) ECI position vectors of landmarks
jD (1,1) Julian date
fOV (1,1) Sensor field of view
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Outputs
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uS (3,3) Three stars
rL (3,3) Three landmarks
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SC: Ephem/LoadFK5 SC: Ephem/MoonV2 SpacecraftEstimation: StellarCatalog/LoadCatalog SpacecraftEstimation: StellarData/FK5Polar SpacecraftEstimation: StellarData/Hipparcos Common: General/DeBlankLT Common: Graphics/NewFig Common: Graphics/PltStyle Common: Graphics/TitleS Common: Time/DTSToDTA Common: Time/Date2JD Common: Transform/RaDec2U Math: Linear/Mag Math: Linear/Unit
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