[Lowfer] 15db drop in HBG today, 2003-01-07-0600

[Dexter McIntyre]

There was a sudden 15 dB drop in the 75 kHz HBG signal received here in
NC at just before 0600 UT.  Looks like it was down for about half and
hour then suddenly came back up to normal.  The noise floor, which
usually fluctuates with propagation changes, remained constant during
this time.  Transmitter maintenance maybe?

Plot can be seen at:

http://www.w4dex.com/75khz/hbg07dec02.jpg

Near real time plot can be seen at:

http://www.w4dex.com/75khz/hbg.jpg

Dex