> For the complete documentation index, see [llms.txt](https://px4.gitbook.io/px4-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://px4.gitbook.io/px4-user-guide/development/middleware/msg_docs/satelliteinfo.md).

# SatelliteInfo

[source file](https://github.com/PX4/PX4-Autopilot/blob/main/msg/SatelliteInfo.msg)

```c
uint64 timestamp		# time since system start (microseconds)
uint8 SAT_INFO_MAX_SATELLITES = 20

uint8 count			# Number of satellites visible to the receiver
uint8[20] svid	 		# Space vehicle ID [1..255], see scheme below
uint8[20] used			# 0: Satellite not used, 1: used for navigation
uint8[20] elevation		# Elevation (0: right on top of receiver, 90: on the horizon) of satellite
uint8[20] azimuth		# Direction of satellite, 0: 0 deg, 255: 360 deg.
uint8[20] snr			# dBHz, Signal to noise ratio of satellite C/N0, range 0..99, zero when not tracking this satellite.
uint8[20] prn                   # Satellite PRN code assignment, (psuedorandom number SBAS, valid codes are 120-144)

```