.. _rst_acronyms:

Commonly Used Acronyms
======================

Here is a table of some of the acronyms used in this documentation, along with the words they stand
for.

+----------+-------------------------------------------------+
| Acronym  | Meaning                                         |
+==========+=================================================+
| DCM      | Direction Cosine Matrix                         |
+----------+-------------------------------------------------+
| ECEF     | Earth Centered Earth Fixed                      |
+----------+-------------------------------------------------+
| FOGM     | First-Order Gauss-Markov                        |
+----------+-------------------------------------------------+
| GPS      | Global Positioning System                       |
+----------+-------------------------------------------------+
| GNSS     | Global Navigation Satellite System              |
+----------+-------------------------------------------------+
| ENU      | East North Up                                   |
+----------+-------------------------------------------------+
| HAE      | Height Above Ellipsoid                          |
+----------+-------------------------------------------------+
| IMU      | Inertial Measurement Unit                       |
+----------+-------------------------------------------------+
| INS      | Inertial Navigation System                      |
+----------+-------------------------------------------------+
| LLA      | Latitude Longitude Altitude                     |
+----------+-------------------------------------------------+
| LLH      | Latitude Longitude Height                       |
+----------+-------------------------------------------------+
| MP       | :class:`~navtk::filtering::MeasurementProcessor`|
+----------+-------------------------------------------------+
| MSL      | Mean Sea Level                                  |
+----------+-------------------------------------------------+
| NED      | North East Down                                 |
+----------+-------------------------------------------------+
| PRN      | Pseudo Random Number                            |
+----------+-------------------------------------------------+
| PVA      | Position Velocity Attitude                      |
+----------+-------------------------------------------------+
| RPY      | Roll Pitch Yaw                                  |
+----------+-------------------------------------------------+
| SB       | :class:`~navtk::filtering::StateBlock`          |
+----------+-------------------------------------------------+
| SV       | Space Vehicle                                   |
+----------+-------------------------------------------------+
| VSB      | Virtual State Block                             |
+----------+-------------------------------------------------+