Thursday, January 28, 2010
The ISS puts out a strong signal on 145.800 MHz FM and a 2m handheld with a 1/4 wave groundplane antenna will be enough to receive it. The FM transmission uses 5 kHz deviation which is standard in much of the world.
Many FM rigs in the UK can be switched between wide and narrow deviation FM filters so select the wider deviation. Handhelds all seem to have a single wide filter fitted as standard.
Free PC sound card Slow Scan TV software such as MMSSTV can be used to display the pictures and you can use software such as the IZ8BLY Vox Recoder to save the audio for later decoding if you are away at work.
Russian Federal Space - ISS Experiments January 25-31 (Google English)
Information on the MAI-75 SSTV experiment
How to access the ISS Slow Scan TV
Free Slow Scan TV Software MMSSTV uses your PCs Soundcard
IZ8BLY Vox Recoder, enables you to record the signals from the ISS on 145.800 MHz while you're away at work
ISS Real Time Tracking (tick draw footprint)
Amateur Radio on the International Space station (ARISS) SSTV picture gallery
ISS Fan Club
AMSAT-UK publish a colour A4 newsletter, OSCAR News, that is full of Amateur Satellite information.
Join online at https://secure.amsat.org.uk/subs_form
HOW TO READ PROPAGATION NUMBERS
The A index [ LOW is GOOD ]
- 1 to 6 is BEST
- 7 to 9 is OK
- 11 or more is BAD
Represents the overall geomagnetic condition of the ionosphere ("Ap" if averaged from the Kp-Index) (an average of the eight 3-hour K-Indices) ('A' referring to amplitude) over a given 24 hour period, ranging (linearly) typically from 1-100 but theoretically up to 400.
A lower A-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Ap-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.
SFI index [ HIGH is GOOD ]
- 70 NOT GOOD
- 80 GOOD
- 90 BETTER
- 100+ BEST
The measure of total radio emissions from the sun at 10.7cm (2800 MHz), on a scale of 60 (no sunspots) to 300, generally corresponding to the sunspot level, but being too low in energy to cause ionization, not related to the ionization level of the Ionosphere.
Higher Solar Flux generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; Solar Flux rarely affects the 30, 40, 60, 80, & 160 Meter Bands.
K index [ LOW is GOOD ]
- 0 or 1 is BEST
- 2 is OK
- 3 or more is BAD
- 5 is VERY VERY BAD
The overall geomagnetic condition of the ionosphere ("Kp" if averaged over the planet) over the past 3 hours, measured by 13 magnetometers between 46 & 63 degrees of latitude, and ranging quasi-logarithmically from 0-9. Designed to detect solar particle radiation by its magnetic effect. A higher K-index generally means worse HF conditions.
A lower K-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Kp-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.
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