Fiera 1 & 2 operate synchronously one mosaic half each (0ns)

ONE system

Different mosaic cameras

Multiple Controllers

One shutter

Fiera 3 operates four independentAuxiliary CCDs : First Software camera : Guiding G1 & G2 Second software camera : Image Analysis EF & IF

Guider 1

Guider 2

ImageAnalyser

EF

ImageAnalyser

IF

S C I E N C E

M O S A I C

16 K x 16 K

SHUTTER

CLOSED

ASSUMPTION :The System has been

set-upwith all individual

Star& window coordinates for G1 G2 EF IF

CCDs have been wiped

OPENING

SHUTTER

NOW

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 timeT2 >> T1

G1

G2

Readout

pre-selected window

CCDwindow

EF

IF

G1

G2

Resulting Image

(scaled up for demo)

CCDwindow

EF

IF

G1

G2

Resulting Image

(scaled up for demo)

CCDwindow

Readout different pre-selected window

CCD window

EF

IF

G1

G2

Continuous

LONG Time

Integration

on MOSAIC

with

OPEN shutter

Resulting Image

(scaled up for demo)

CCDwindow

Resulting image (scaled up for demo)

CCD window

EF

IF

Still integrating

for typ. 30 sec.

Still integrating

for typ. 30 sec.

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 timeT2 >> T1

G1

G2

Readout

pre-selected window

CCDwindow

EF

IF

G1

G2

Resulting Image

(scaled up for demo)

CCDwindow

EF

IF

G1

G2

Resulting Image

(scaled up for demo)

CCDwindow

Readout different pre-selected window

CCD window

EF

IF

G1

G2

Continuous

LONG Time

Integration

on MOSAIC

with

OPEN shutter

Resulting Image

(scaled up for demo)

CCDwindow

Resulting image (scaled up for demo)

CCD window

EF

IF

Still integrating

for typ. 30 sec.

Still integrating

for typ. 30 sec.

G1

G2

If 30 seconds are Over

Resulting Image

(scaled up for demo)

CCDwindow

Resulting image (scaled up for demo)

CCD window

EF

IF

Still integrating

for typ. 30 sec.

Still integrating

for typ. 30 sec.

Pause guiding loopReadout pre-selected

individ. windows of

Image Analyzers

sequentially

G1

G2

PAUSE

EF

IF

PAUSE

Continuous

LONG Time

Integration

on MOSAIC

with

OPEN shutter

G1

G2

PAUSE

EF

IF

PAUSE

Read Window

Continuous

LONG Time

Integration

on MOSAIC

with

OPEN shutter

G1

G2

PAUSE

EF

IF

PAUSE

Resulting Image (scaled up)

Continuous

LONG Time

Integration

on MOSAIC

with

OPEN shutter

G1

G2

PAUSE

EF

IF

PAUSE

Resulting Image (scaled up)

Continuous

LONG Time

Integration

on MOSAIC

with

OPEN shutter

Read Window

G1

G2

PAUSE

EF

IF

PAUSE

Resulting Image (scaled up)

Continuous

LONG Time

Integration

on MOSAIC

with

OPEN shutter

Resulting Image (scaled up)

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)

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 timeT2 >> T1

This whole process of

Guiding Loop &

Image Analysis Loop

continues until the exposure time on the

MOSAIC is over

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 timeT2 >> T1

CLOSE

SHUTTER

NOW

SHUTTER

CLOSED