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Chirping

G3PLX Project

Radio

Chirping

G3PLX Project

Language:

Espaņol

Themes:

Introduction

Principle

Timing

Notation

Chirps

Exceptions

**Statistics**

Mailing list

Links

It is not possible to distribute a definitive list of all known chirp sounders on a web site, since many of them change from day to day, or week to week. The list below gives those that are known to be reasonably stable, or rather were at the time of publication! Current observations are generally distributed by email.

The times quoted here are the * source* chirp time, i.e. the time
that would be measured by a receiver on the transmitter site. You can
estimate your chirptime by adding 1 ms for every 300 km of range from the
source. For example, for a chirp time of 300:245.000 and a range of 10,000
km, expect the signal to arrive at about 300:245.030.

Chirp times are typically quoted in the form period:chirp time, where the period is in seconds, and the chirp time is the zero frequency extrapolated time of the first chirp transmitted each hour.

Period:Chirp Lat Long Approx location -------------+--------+-------------------- 900:178.5496 33S 149E Canberra, Australia 300:250.0000 35N 34E Cyprus 300:224.14595 52S 59W Stanley, Falkland Is 300:77.94247 54N 03W Inskip UKA summary of known chirps is available via email on a regular basis to those involved in the project. A recent copy of this summary in electronic form suitable for spreadsheet use is available here. The summary can also be viewed online in html form.

Copyright Murray Greenman and Peter Martinez, 1999 - 2003 |