Tools

Tools concerning Amateur and Amateur Satellite Service.
If you have any suggestions for tools that should be listed here, drop me a message.

Time

Clock UTC (PTB - Physikalisch-Technische Bundesanstalt)
 

Propagation Prediction and Space Weather

VOACAP - online HF path calculation (HowTo)
radiofresnel - online 3D Fresnel Zone calculation (HowTo)

Geomagnetic Kₚ Index (GFZ Helmholtz Zentrum, Potsdam)
Bars: last 24 h and 4 d  |  Archive  ||  Bartels Music Diagram: last 4 m   |  Archive

Lightning Detection

Near Real-Time Maps and Data about Ionosphere Conditions (Web Tool)

NCDXF/IARU HF Beacon Project live schedule
RBN - Reverse Beacon Network
WSPR Map - Weak Signal Propagation Reporter

Antenna Simulation (NEC - Numerical Electromagnetics Code)

4NEC2 - free NEC2 implementation
EZNEC - free NEC2 implementation (no further development)
NEC5 licence - most advanced NEC enginge
WattWächter - BNetzA tool calculating electromagnetic fields (german, BEMFV)

Frequency Allocation

Frequenzplan (BNetzA - Bundesnetzagentur - Germany)

ITU: Radio Services and Their Needs

(aus: ITU Handbook: The Ionopshere and its effects on Radiowace Propagation, 6.7, Table 6.5, p. 78)

	Fixed Service	Mobile Service	Broadcasting Service
Communication Type	Point-to-Point	Point-to-Point  and/or Point-to-Area	Point-to-Area
Information Flow	One-  or  Two-way	Two-way	One-way
Frequency Agility	Frequencies can be changed whenever required	Frequencies can be changed whenever required	Frequency Continuity desirable
Reliability considered	Reception Reliability	Communications  or Service Reliability	Service Reliability
Transmitter Power	Medium	Medium  or  Low	High
Receiver Sensitivity  /  Antenna Gain	High	High Sensitivity  / Antenna Limitations	Low
User	Technical	Technical	Non-Technical
Minimium required Audio Quality	Intelligable	Intelligable	Good