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

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

4. SHUTTER CLOSED

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

6. OPENING SHUTTER NOW

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

26. SHUTTER CLOSED