Worked JT65B stations on 2m EME, mainly on moonrise (some on moonset) :
After every single JT65B QSO, the screenshots of the vital QSO information and
the waterfall traces as a view out of the attic window,
corresponding to the antenna position
With more than 250 different initials in the log, the size of this page has
outgrown the free capacity provided by the network provider Belgacom.
For JT65B-operation, we usually log in onto the N0UK logger. From
here, we usually note the activity frequencies of initials. (these are new,
never worked 2m EME stations).
CW, all QSO's in the log, below, were truely random! This used to
be different back in the early eighties or nineties.
The entire and updated 2007 to 2011 JT65B & CW EME-log can be found, here.
On 01/07/2011, we worked 4Z5LY on Es on a full band.
This was our country # 100; finally DXCC on 2m.
We're especially glad since this was achieved, mainly from a residential QTH with:
-a good number of neighbours (not rural)
-modest antenna gain (<13dBd)
-a relatively low antenna. (not on a
hilltop but just 9m agl or at 31m asl)
-a minimum of interactivity to achieve the QSO (if any)
After more than 120 2m EME QSO's ( WSJT but also CW) since settling down
at our new QTH, an evaluation was made and
compared to the theoretical prediction (based on
ideal ground )
The results are surprising pointing to the superb ground properties at this QTH.
For every valid 2m EME QSO, the azimuth and elevation position of the moon were recorded and put in a
However, most EME QSO's have been performed between azimuths of about 45° (northeast) ato close to 160°. (beyond southeast, close to southern heading)
The former azimuth has always been very clear and relatively unobstructed, the
latter has much improved since a neighbour cut a long row
of about 20 to 30 tall trees.
-about 2.5 hours of moontime after moonrise, a period after which I usually quit for:
- family reasons
- the laptop battery being empty
- supposed too high elevations (beyond 20° )
Our garden house heading of 125° was already outlined to be too far from the reflection point to of importance.
A more comprehensive analysis is provided by counting the occurances by elevation:
On the X-scale, we count the amount of occurances for a certain elevation angle (in degrees). (Y-scale)
The amount of occurances corresponds with the amount of valid QSO's that were made for the specified (moon) elevation angle.
The following distinct elevations can be read from the column diagram:
With the relatively low amount of samples (number of QSO's per elevation angle), the correlation with the theoretical, predicted values is astonishing;
Yagi Optimizer 7.5 predicts, over ideal ground and with the given height over ground of the 2M12 (2.87λ long, 12el antenna) pretty much the same values,
as observed during the more than hundred 2m EME QSO's!
This remarkable result points to the relative accuracy of the antenna simulation program (with ideal ground) and the excellent reflecting ground properties at the Brussels airport plateau.