1. Different mosaic cameras
ONE system
Different mosaic cameras
Multiple Controllers
One shutter
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Fiera 1 & 2 operate synchronously one mosaic half each (0ns)
Fiera 3 operates four independent
Auxiliary CCDs :
First Software camera :
Guiding G1 & G2
Second software camera :
Image Analysis EF & IF

2. S C I E N C E M O S A I C 16 K x 16 K Image Analyser EF Guider 1 Image
AnalyserIF
Guider 2

3. SHUTTER
CLOSED

4. Star& window coordinates for G1 G2 EF IF
ASSUMPTION :
The System has been
set-up
with all individual
Star& window coordinates for G1 G2 EF IF
CCDs have been wiped

5. OPENING
SHUTTER
NOW

6. Continuous LONG Time Integration on MOSAIC with OPEN shutter G1 EF IF
Integrate with
‘electronic’ exposure time T1
Integrate with ‘electronic’ exposure time T2 >> T1 G1 EF
Continuous
LONG Time
Integration
on MOSAIC
with
OPEN shutter
Integrate with IDENTICAL
‘electronic’
exposure time
T2 >> T1 IF G2
Integrate with IDENTICAL ‘electronic’ exposure time T1

7. Readout
pre-selected window
CCD
window G1 EF IF G2

8. Resulting Image
(scaled up for demo)
CCD
window G1 EF IF G2

9. CCD window G1 EF IF G2 Resulting Image (scaled up for demo) CCD window
Readout different
pre-selected window

10. Continuous LONG Time Integration on MOSAIC with OPEN shutter CCD
Resulting Image
(scaled up for demo)
CCD
window
Still integrating
for typ. 30 sec. G1 EF
Continuous
LONG Time
Integration
on MOSAIC
with
OPEN shutter
Still integrating
for typ. 30 sec.
CCD window IF G2
Resulting image
(scaled up for demo)

11. The guiding loop starts again with OPEN Shutter G1 EF IF G2
Integrate with
‘electronic’ exposure time T1
Integrate with ‘electronic’ exposure time T2 >> T1 G1 EF
The guiding loop
starts again
with OPEN Shutter
Integrate with IDENTICAL
‘electronic’
exposure time
T2 >> T1 IF G2
Integrate with IDENTICAL ‘electronic’ exposure time T1

12. Readout
pre-selected window
CCD
window G1 EF IF G2

13. Resulting Image
(scaled up for demo)
CCD
window G1 EF IF G2

14. CCD window G1 EF IF G2 Resulting Image (scaled up for demo) CCD window
Readout different
pre-selected window

15. Continuous LONG Time Integration on MOSAIC with OPEN shutter CCD
Resulting Image
(scaled up for demo)
CCD
window
Still integrating
for typ. 30 sec. G1 EF
Continuous
LONG Time
Integration
on MOSAIC
with
OPEN shutter
Still integrating
for typ. 30 sec.
CCD window IF G2
Resulting image
(scaled up for demo)

16. If 30 seconds are Over Pause guiding loop Readout pre-selected
Resulting Image
(scaled up for demo)
CCD
window
Still integrating
for typ. 30 sec. G1 EF
If 30 seconds are Over
Pause guiding loop
Readout pre-selected
individ. windows of
Image Analyzers
sequentially
Still integrating
for typ. 30 sec.
CCD window IF G2
Resulting image
(scaled up for demo)

17. Continuous LONG Time Integration on MOSAIC with OPEN shutter G1 EF IF
PAUSE G1 EF
Continuous
LONG Time
Integration
on MOSAIC
with
OPEN shutter IF G2
PAUSE

18. Continuous LONG Time Integration on MOSAIC with OPEN shutter G1 EF IF
Read Window
PAUSE G1 EF
Continuous
LONG Time
Integration
on MOSAIC
with
OPEN shutter IF G2
PAUSE

19. Resulting Image (scaled up)
PAUSE G1 EF
Continuous
LONG Time
Integration
on MOSAIC
with
OPEN shutter IF G2
PAUSE

20. Resulting Image (scaled up)
PAUSE G1 EF
Continuous
LONG Time
Integration
on MOSAIC
with
OPEN shutter IF G2
Read Window
PAUSE

21. Continuous LONG Time Integration on MOSAIC with OPEN shutter G1 EF IF
Resulting Image (scaled up)
PAUSE G1 EF
Continuous
LONG Time
Integration
on MOSAIC
with
OPEN shutter IF G2
Resulting Image (scaled up)
PAUSE

22. and the 30 sec. Integration on the Image Analyzers
Resulting Image (scaled up)
PAUSE G1 EF
AND NOW :
The Guiding Loop
and the 30 sec. Integration
on the Image Analyzers
starts all over again
with open shutter IF G2
Resulting Image (scaled up)
PAUSE

23. continues until the exposure time on the MOSAIC is over
Integrate with
‘electronic’ exposure time T1
Integrate with ‘electronic’ exposure time T2 >> T1 G1 EF
This whole process of
Guiding Loop &
Image Analysis Loop
continues until the exposure time on the MOSAIC is over
Integrate with IDENTICAL
‘electronic’
exposure time
T2 >> T1 IF G2
Integrate with IDENTICAL ‘electronic’ exposure time T1

24. CLOSE SHUTTER NOW G1 EF IF G2 Integrate with
‘electronic’ exposure time T1
Integrate with ‘electronic’ exposure time T2 >> T1 G1 EF
CLOSE
SHUTTER
NOW
Integrate with IDENTICAL
‘electronic’
exposure time
T2 >> T1 IF G2
Integrate with IDENTICAL ‘electronic’ exposure time T1

25. SHUTTER
CLOSED