Garmin G600 manual Weather Radar, Garmin GWX 68 Radar Description

System Foreword

Sec 1

4.10 Weather Radar

The G600 can display weather radar from a Garmin GWX system or from selected 3rd-party radars. Only one weather radar system may be interfaced to the system. For detailed information on the operation of 3rd-party radars, refer to their specific documentation.

4.10.1Garmin GWX 68 Radar Description

	Sec 2 PFD
	Sec 3 MFD
Sec 4	Hazard Avoidance
Sec 5	Additional Features
Sec 6	Annun. & Alerts
	Sec 7 Symbols
	Sec 8 Glossary
	Appendix A
	Appendix B Index

The Garmin GWX 68 Airborne Color Weather Radar is a four color digital pulsed radar with 6.5 kilowatts of power. It combines excellent range and adjustable scanning profiles with a high-definition target display. The pulse width is four microseconds on all ranges except the 2.5 NM range. The GWX 68 uses a one microsecond pulse width at this range to reduce the smearing of targets on the display. This allows better target definition at close range.

To focus radar scanning on specific areas, Sector Scanning offers pilot- adjustable horizontal scan angles of 20º, 40º, 60º, or 90º. A vertical scanning function helps to analyze storm tops, gradients, and cell buildup activity at various altitudes.

Other features include:

•Extended Sensitivity Time Control (STC) logic that automatically correlates distance of the return echo with intensity, so cells do not suddenly appear to get larger as they get closer.

•WATCH™ (Weather Attenuated Color Highlight) which helps identify possible “shadowing” effects of short-range cell activity – identifying areas where radar return signals are weakened, or attenuated, by intense precipitation (or large areas of lesser precipitation) and may not fully reflect the “storm behind the storm.”

•Weather Alert that looks ahead for intense cell activity in the 80-320 NM range, even if these ranges are not being monitored.

4.10.1.1Principles of Pulsed Airborne Weather Radar

The term RADAR is an acronym for RAdio Detecting and Ranging. Pulsed radar locates targets by transmitting a microwave pulse beam that, upon encountering a target, is then reflected back to the radar receiver as a return “echo.” The microwave pulses are focused and radiated by the antenna, with the most intense energy in the center of the beam and decreasing intensity near

4-80 Garmin G600 Pilot’s Guide 190-00601-02 Rev. E