Hi All,
Having gone to the trouble to find out when to listen for these transmissions,
I thought I would share the results with those who might be interested to
listen for the transmissions on VLF and perhaps on 130 kHz. Though whether we
have any chance of hearing the latter in Europe I rather doubt.
Times when the IMAGE satellite starts to descend from 50 deg North (when VLF Tx
turned on), within a Longitude range of +/- 30 degrees. (Sri if you are outside
Europe, you will have to go to
http://sscweb.gsfc.nasa.gov/cgi-bin/sscweb/Locator.cgi and work it out for
yourselves)
Time GEO
yy/mm/dd hh:mm Lat Long
01/11/21 21:14 50.25 -5.73
01/11/24 20:24 50.40 3.86
01/11/27 19:34 50.55 13.43
01/11/30 18:44 50.66 23.00
The VLF transmissions will be 0.125 seconds on, 0.375 seconds off, at 5, 7, 9, 11, 13, and 15 kHz, repeated over and over.
Times of closest approach to South Pole. 4 mins before this the VLF Tx will be
turned off and transmission will start on 130 and 380 kHz for 8 minutes.
yy/mm/dd hh:mm
01/11/21 08:18
01/11/22 12:46
01/11/23 03:00
01/11/23 17:14
01/11/24 07:28
01/11/24 21:42
01/11/25 11:56
01/11/26 02:10
01/11/26 16:24
01/11/27 06:38
01/11/27 20:52
01/11/28 11:06
01/11/29 01:18
01/11/29 15:32
01/11/30 05:46
01/11/30 20:00
01/12/01 10:14
01/12/02 00:28
01/12/02 14:42
01/12/03 04:56
01/12/03 19:10
01/12/04 09:24
01/12/04 23:38
01/12/05 13:52
73, John, G4CNN
-----Original Message-----
From: "ARi"<[email protected]>
To: [email protected]
Date: Tue Nov 20 08:51:05 PST 2001
Subject: LF: IMAGE Satellite Experiment IMAGE Satellite Experiment
Dear LF and Natural Radio Observers,>
INSPIRE has arranged to perform experiments to test propagation to the ground from the Radio Plasma Imager
instrument on the IMAGE Satellite over two weeks starting on November 21, 2001. A table at the end gives the
times for the experiments.
There will be two sets of experiments, at 5-15 kHz (VLF) and at 130 and 380
kHz. The 5-15 kHz experiments will be
performed on the incoming (towards perigee), southward traveling part of every
orbit, starting at about the point where
the magnetic field line through the satellite is at about 50 degrees N latitude. They will continue until the the 130 and
380 kHz experiment begins. The 130 and 380 kHz transmissions will begin when the satellite is four minutes before the
closest approach to the South Pole, and continue four minutes past closest
approach.
You could be prime observers for the VLF experiments!
The VLF transmissions will be 0.125 seconds on, 0.375 seconds off, at 5, 7, 9,
11, 13, and 15 kHz, repeated over and
over.
Details of the satellite orbit, both graphical and tabular, may be found at the
Satellite Situation Center web site:
http://sscweb.gsfc.nasa.gov/cgi-bin/sscweb/Locator.cgi
and
http://www.lwca.org/mb/msg/1462.htm
ARi.
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