> For the complete documentation index, see [llms.txt](https://docs.phoenixlidar.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.phoenixlidar.com/general-faq/abbreviations.md).

# Abbreviations

| Term        | Description                                 |
| ----------- | ------------------------------------------- |
| AGL         | Above Ground Level                          |
| AOI         | Area Of Interest                            |
| DTM         | Digital Terrain Model                       |
| FOD         | Foreign Object Debris                       |
| FOV         | Field Of View                               |
| GCP         | Ground Control Point                        |
| GCS         | Ground Control Station                      |
| GNSS        | Global Navigation Satellite System          |
| GPS         | Global Positioning System                   |
| GSD         | Ground Sample Distance                      |
| IMU         | Inertial Measurement Unit                   |
| INS         | Inertial Navigation System                  |
| LiDAR       | Light Detection and Ranging                 |
| MASL or MSL | Meters Above Sea Level                      |
| NIR         | Near Infrared                               |
| PPK         | Post Processed Kinematic                    |
| PPM         | Points Per Meter                            |
| PPS         | Points Per Second                           |
| RGB         | Red Green Blue (as in light color spectrum) |
| RTK         | Real Time Kinematic                         |
| UAS         | Unmanned Aerial System                      |
| UAV         | Unmanned Aerial Vehicle                     |
| VTOL        | Vertical Takeoff and Landing                |


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