Beacon list - Legend

Description of the table columns:

Column	Unit	Description
Location		Location of the transmitter - Normally Country/City
Chirpref	s	Reference time (G3PLX system) of the first transmission, in seconds
Latitude	°N	Latitude of the beacon in degrees North (South is negative)
Longitude	°E	Longitude of the beacon in degrees East (West is negative)
Call		Identification. The digisondes receive an identification on installation (nothing to do with the classic prefixes).
Number		This is just a unique number of this database entry (in order of data entry), to be able to reference an incomplete data line (e.g. if the beacon hasn't been identified yet)
Period	s	Repetition period of the transmission, in seconds
Scan speed	kHz/s	Scan speed of the beacon, in kHz per second
Drift	ms/day	Displacement of the reference time of the beacon, in milliseconds/day, if the beacon is not GPS controlled.
Delay	ms	Propagation time from the beacon to the coordinates entered (probably those of your location). Two values are shown, one for short path, the other for long path. Both are calculated for a round-the-world (RTW) time of 138.5 ms
Real chirp	s	Real chirp reference time as measured by one of the participating stations. This can differ from the official time, if the beacon is not GPS controlled. In that case, it will probably also vary!
Equipment		Brand and model of the beacon transmitter, if known.
Potencia	W	Transmitter power, in Watt
System		If the beacon is part of a group, the name of the system it belongs to
Digisonda		Flag indicating if this is a classic ionosonde or a digital digisonde (not easily received)
ChirpCom		Flag indicating if the beacon is capable of transmitting messages in FSK on top of the carrier (ChirpCom system, variations of 2.5 ms)
Radar		Marks if this is a backscatter radar. If so, don't trust the start time, which can vary day by day.
GPS		Flags if the beacon is controlled by GPS or not

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(c) John Coppens ON6JC/LW3HAZ

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