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Amateur radio HF communications

This activity introduces the concept of HF communications and provides practice in its use.

Introduction

HF propagation

Sunspots on the surface of the sun Solar flare errupting from the surface of the sun The Aurora Borialis

SUN SPOTS    SOLAR FLARES    AURORA

Solar terrestrial data widget showing Sun and HF conditions

SOLAR AND TERRESTRIAL DATA
SFI = SOLAR FLARE INDEX
SN = SUNSPOT NUMBER

NOAA sunspot number

Estimated International Sunspot Number

NOAA estimated planitary K index

K INDEX 

Preparation

Activity

Boy with headset operating amateur radio station Four smiling girls operating a transceiver

Homework