.. _file_agents_gnss_constellation.h:

File gnss_constellation.h
=========================

|exhale_lsh| :ref:`Parent directory <dir_agents>` (``agents``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS



GNSS constellation with precomputed ephemerides and transmitter metadata. 



.. contents:: Contents
   :local:
   :backlinks: none

Definition (``agents/gnss_constellation.h``)
--------------------------------------------


.. toctree::
   :maxdepth: 1

   program_listing_file_agents_gnss_constellation.h.rst



Detailed Description
--------------------

Stanford NAV LAB 

0.1 

2025-06-07

Copyright (c) 2025

This class is the C++ counterpart of ``pylupnt.measurements.gnss_meas.GNSSMeas`` (see ``python/pylupnt/measurements/gnss_meas.py``). It is intended to support cislunar / sidelobe GNSS navigation scenarios. Receiver-dependent operations such as light-time iteration, visibility, C/N0 thresholding, and channel selection are intentionally performed by the GNSS measurement model because they depend on the receiver state and receive epoch.

Unlike ``GNSSMeas``, which propagates / loads GNSS ephemerides itself (via SP3/BRDC loaders), ``GnssConstellation`` consumes precomputed ephemerides (position/velocity history in ECI)  either set directly with ``SetSatelliteStates``, or loaded from an HDF5 file with ``LoadEphemeris`` (e.g. produced by a Python preprocessing step using ``SP3Loader``/``BRDCLoader``). 




Includes
--------


- ``filesystem``

- ``lupnt/agents/constellation.h``

- ``lupnt/agents/gnss_attitude.h``

- ``lupnt/devices/space_comms.h``

- ``lupnt/measurements/antenna.h``

- ``lupnt/numerics/cheby_fit.h``

- ``map`` (:ref:`file_interfaces_maplot.cc`)

- ``vector`` (:ref:`file_numerics_vector_macros.h`)



Included By
-----------


- :ref:`file_agents_gnss_constellation.cc`

- :ref:`file_lupnt.h`

- :ref:`file_measurements_gnss_measurement.h`

- :ref:`file_simulations_LunarGnssODTS_lunar_gnss_odts_simulation.h`




Namespaces
----------


- :ref:`namespace_lupnt`


Classes
-------


- :ref:`exhale_struct_structlupnt_1_1GnssOccludingBody`

- :ref:`exhale_struct_structlupnt_1_1GnssReceiverParams`

- :ref:`exhale_class_classlupnt_1_1GnssConstellation`