23cm EME SSTV
Slow Scan Television via moon bouncing
SSTV consists of sending static images via a narrow bandwidth radio mean.
The images after travelling for more than 800.000km and being bounced off the moon are quite different from the originals.
The reason is the effect of moon reflection causing by very fast signal variations due to the relative moon-earth motion and irregularities on moon surface (libration).
The result is a strong distortion, with deep loss of information, on received images somehow independent from signal strenght at the receiving site.
The initiative was taken by the group of radio amateur taking care of operations from the Dwingeloo dish.
The dish is an old radio telescope located in Dwingeloo (Nederlands)with a diameter of 25m.
It is now a national monument recently refurbished and still operational as amateur radio station and for public cultural events.
During many of those events e few amateur stations with EME capabilities on 23cm were involved as counterparts.
PA3FXB operating EME at the Dwingeloo station
For who wants to know more about the Dingeloo monument can look at: Dwingeloo Observatory
The following are examples of sstv transmission via moon reflection.
The images were sent from my station and received at the Dwingeloo place.
The images were transmitted using MMSTV program (Martin 2 mode) with about 400w of power on 1296.110 Mhz.
At the left the orginal, at the right as received.
Neil Armstrong foot print on moon
A red Moon
Dark side of the moon