RADIOASTRONOMY

"RameauBis"
at 10-11Ghz

See Original RAMEAU : http://www.ias.u-psud.fr/pperso/hdole/rameau/

also http://astro.u-strasbg.fr/~koppen/10GHz/simple.html

click here for first trial page

Below, how to record a Sun transit (just a 5800K heat source detection)

The first trial (20051026) with no more used standard equipment ... + Satellite finder !
TV is blank (or Satellite TV shows up or some Sun signal beeps when properly oriented)

20051027 :
Equatorial mounting on SPDX + webcam (AVI + Satfinder sound)
Fixation details
View from the terrasse below
Detail of CD position (sending sun light on LNB for centering)
Note : The CD if removed gives same signal.
Test 1 : Sun not centered (bright circle on LNB external shelter)...
No Sun signal !
Test 2 : Sun centered ...

Full signal* !!
See Divx below for evolution during a subsequent transit!

* The Satfinder was set to 10 while centering the Sun energy at the middle of the LNB by turning the equatorial mount as seen on left.

 

Sun REAL transit 20051027 (14min AVI + sound) in DivX 6 - size 14Mo

Mount motors OFF... The Sun 10 Ghz beam enters slowly in the detection field then moves away !
The audio signal of the Satfinder is the whisling sound heard, its intensity in concordance with the needle position.

News (20051028) : a signal transit obtained today under light clouds ! looks normal ...

Next steps :

1) Open the Satfinder !

Find the small notch on the back top.
Pushing up the back with small jewellry screwdriver to open
Inside of SatFinder -
White arrows show where signal will be taken

 

2) Add resistors to get the wanted voltage signal (0-1.5V for inteface below)

Just doing it :)


3) Use of an interface to record the signal
I will try the cheap one described at http://radio.meteor.free.fr/electro.html
Signal accepted : 0 - 2V or less.