Passive Optical

Biblos.COTS This is Biblos COTS package with installation script. Script installs libraries:- kissFFT- boost- netcdf- zlib- hdf5- eigen

Biblos.SceneInteraction The Scene Interaction Geometry Block projects the pixel array onto the Digital Elevation Model (DEM). It is catered for Earth observing missions only. Atmospheric and calibration scenes are not taken into account in this Block . The inputs to this Block are the line-of-sight (LOS) in Instrument frame, the rotation matrix from Instrument to ECEF frame, calculated in the Instrument Projection algorithm , the Satellite orbit and the DEM. The output of this Block is the observation area in latitude and longitude. This Block additionally computes, based on the Satellite orbit and attitude, the additional scene data needed for scene generation like Solar Zenith Angle (SZA), Observation Zenith Angle (OZA) and the Relative Azimuth Angle (RAA). These angles are inputs to the Scene Generator Module.

Biblos.Geometry This is a module composed of Biblos.Orbit, Biblos.Attitude, Biblos.AocsInstrumentCoupling and Biblos.SceneInteraction blocks.The Geometry Module is in charge of simulating the spacecraft orbit and attitude, the instrument line-of-sight, the observation area and the auxiliary geometrical data to feed the Scene Generator. The Orbit Block calculates the nominal, Satellite and Restituted orbit.• The Attitude Block calculates the nominal, Satellite and Restituted attitude.• The AOCS/Instrument Block simulates the detector line. It is composed by two sub-Blocks:o The LOS Simulator calculates the detector elements’ line-of-sight, and the misalignments in in instrument frame.o The Instrument Projection transforms the line-of-sight for the detector elements in ECEF frame.• The Scene Interaction Geometry Block calculates the area of observation from the detector line-of-sight in the digital elevation model DEM. This Block also calculates a number of geometrical inputs needed for the Scene Generation Module like the Observation Zenith Angle, Sun Zenith Angle, etc.

Biblos.Commons This is a package common for all the Blocks and Modules. Commons contain helper functions e.g. for reading NetCDF or parsing XML files as well as Blocks and Modules interfaces.

Multi-band Imager - Instrument data simulator, Proof of Concept Passive Optical Imager - Geometry, Scene Generator & Instrument Modules

Tool: Tiff to NetCDF converter BIBLOS works with NetCDF format for the images. This is a tool to convert Tiff to NetCDF. It is external to BIBLOS, the user shall convert the image offline. THe package includes an executable, a README file (with instructions) and an example auxiliary file.

Biblos.Orbit In charge of the simulation of the nominal, real and estimated orbits. This block computes the nominal orbit from the input orbit parameters and disturbs this orbit with natural orbit perturbations. In addition, estimated orbit is calculated based on standard orbit determination methods.

Biblos.Attitude In charge of the simulation of the nominal, real and estimated platform attitude. This block computes the nominal attitude from the input mission configuration parameters and simulates the operation of attitude actuators, sensors and environmental torques.

Biblos.AOCSInstrumentCoupling This block is in charge of modelling the instrument LOS and detector projection coupling it with the platform AOCS and producing the final instrument viewing directions for image acquisition.Calculates the LOS (Line-Of-Sight) in instrument frame. The Instrument Projection calculates the LOS in ECEF frame. It is in charge of reproducing the scanning and pointing of the instrument LOS as function of time (cross-track, along-track, bidirectional, slowdown, limb…). In addition, this block couples the platform attitude with this scanning motion of the instrument.