Overview

The START parameter group (specifically START_LATITUDE and START_LONGITUDE) configures the default starting location for the SITL simulator.

Key Concepts

1. Simulated World Origin

When you launch the SITL binary without a specific location flag, it defaults to the coordinates defined here.

Purpose: Allows developers to always start their simulation at a specific airfield or test track.

Developer Notes

Library: libraries/SITL.
SITL Only: These parameters do not exist on real flight controller hardware.

START_LATITUDE

Initial Tracker Latitude deg

Default 0

Range -90 90

Initial Tracker Latitude (START_LATITUDE)

Description

START_LATITUDE (working with START_LONGITUDE) allows you to manually tell an Antenna Tracker where it is physically located.

This is primarily used for trackers that do not have their own internal GPS. By providing these coordinates, the tracker can calculate the correct pointing angle toward the drone based on the drone's GPS telemetry.

Tuning & Behavior

Default: 0.
Usage: Enter the exact latitude of your ground station. If the tracker does have a GPS lock, this parameter is overridden by the real sensor data.

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