AGO VLF/ELF Receiver
The antennae, preamplifiers, and calibration arrangements will be identical to those at Halley. The north-
south and east-west horizontal magnetic components of the wave-field will be digitised and processed in
real time before being recorded to the AGO on-board data storage system. Two types of data set will be
- Type A data: These will be essentially similar to the VELOX data except that,
because of data storage limitations on the AGO, the only channels recorded will be 0.5, 1, 2, 3, and 6 kHz.
The only parameters recorded (to 8-bit resolution) will be mean log power (recording interval 1 s); peak
power and minimum power, average polarisation and average arrival azimuth (all for a 10 s recording interval).
- Type B data: In a `snapshot' mode of operation, a 2 s-long, 0-8 kHz spectrogram will be produced once
every 15 minutes, and stored after data compression. The purpose is to identify the character of the signals (
e.g. chorus, hiss, etc.) recorded in the type A data (type B data are complementary to type A, being non-
continuous in the time domain but with superior time and frequency resolution).
More information and data.
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