ROLIS status and plans for SDL & FSS
W. Bresch
S. Mottola
R. Schrödter
PHILAE Science Team Meeting , Venezia, 31 March 2009
ROLIS tests during commissioning & cruise
tested ROLIS feature
Image w/o illumination, with IFL
Image with illumination by LED
array, with IFL
Image with illumination by LED
array, with IFL, auto-exposure
Image with illumination by LED
array, w/o IFL
DIS-imaging
Full-frame image (stripe)
EEPROM CS verification
EEPROM refresh
S/W Upload (patching)
mode when tested will be tested
DIT
since Comm#2
since Comm#2
PC#4
CUC
PC#6
DIS
PC#10
since Comm#4
PC#12
since Comm#2
PC#8
PC#12
PC#4
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PHILAE Science WS > W.Bresch > ROLIS > Venezia, 31-March-2009
Rosetta
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ROLIS image
w/o IFL
at RolisD switch-on
temperature
- 72°C
(min. -93°C
up to now)
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ROLIS/CIVA imaging during S-D-L & FSS
Separ.Time LandingTime
TR + 0:00:00
TR + 0:03:30
TR + 0:17:00
TR + 0:19:00
TR + 0:22:00
(TR + tbd)
(TL - 0:11:00)
(TL - 0:09:00)
(TL - 0:06:00)
TL + 0:00:00
TL + 0:01:00
TL + 0:01:00
TL + 0:01:30
TL + 0:08:30
Operation
SEPARATION Lander // Orbiter
CivaP imaging
Rolis DIT image#1
Rolis DIT image#2
RolisD_DIS imaging
(latest moment of) Touch-Down
Lander complete operational
RolisDescentStop
RolisDescentCheckR
CivaP imaging
Rolis CUC image_R
Rolis CUC image_G
Rolis CUC image_dark
Rolis CUC image_B
Rolis CUC image_IR
RolisD_off
5x CUC_P&T
Compr1_DIT#2
Compr1_DIS#4
WaitDataComplete
Remark
TBC; 2 images at 1 Mbit/image
1st DIT-image incl.transfer to orbiter
2nd DIT-image incl.transfer to orbiter
Ring-buffer-mode; data transfer after Touch-Down (4 DIS images)
=> RolisD OFF + starts RolisData Processing of 4 DIS images and transfer to CDMS
latest moment of getting operational after nominal Touch-down
emergency TC for stopping DIS-mode (immediate TC) as last chance (TBC)
TC to finish DIS mode in case that RolisIME was reseted (re-booted) during TD
7 images at 1 Mbit/image (tbc)
first CUC-raw image w/o data transfer to CDMS; auto-exposure
Green CUC-raw image w/o data transfer to CDMS; auto-exposure
dark CUC-raw image w/o data transfer to CDMS
Blue CUC-raw image w/o data transfer to CDMS; auto-exposure
IR CUC-raw image w/o data transfer to CDMS and closes IFL; auto-exposure
=> RolisD OFF
CUC image_processing and transfer to CDMS (5 images)
2nd time compressed image DIT#2 to CDMS
2nd time compressed image DIS#4 to CDMS
WAIT for Transfer-Ready
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PHILAE Science WS > W.Bresch > ROLIS > Venezia, 31-March-2009
Image Buffer configuration for S-D-L and FSS
image buffer#0
image buffer#1
image buffer#2
image buffer#3
image buffer#4
image buffer#5
image buffer#6
image buffer#7
2 MB
2 MB
2 MB
2 MB
2 MB
2 MB
2 MB
2 MB
image buffer#0
image buffer#2
image buffer#4
image buffer#5
image buffer#6
2 MB
2 MB
2 MB
2 MB
2 MB
used for DIT#1 image storage + processing
used for DIT#2 image storage + processing
used as ring-buffer A for DIS image storage + processing
used as ring-buffer B for DIS image storage + processing
used as ring-buffer C1 for DIS image storage + processing
used as ring-buffer C2 for DIS image storage + processing
used as ring-buffer C3 for DIS image storage + processing
img#7 used as ROLIS / ÇIVA TM buffer
(CIVA: 1 MByte + ROLIS: 1 MByte)
used for CUC#1 image storage + processing
used for CUC#2 image storage + processing
used for CUC#3 image storage + processing
used for CUC#4 image storage + processing
used for CUC#5 image storage + processing
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ROLIS data transfer during SDL & FSS
DIT#1 and DIT#2 direct transmission to the orbiter during descent
(2x 200 KByte)
4 DIS images after Touch-Down by established RF link whenever
possible, and using CDMS-MM when interrupted
(4x 200 KByte)
5 CUC images by established RF link whenever possible and using
CDMS-MM when interrupted
(4x 200 KByte + max.1.1 MByte / typ. 0.6MByte)
Store the (once more compressed and transferred to CDMS) images
DIT#2 and DIS#4 in the CDMS-MM before switching off the RolisIME
(before the end of FSS)
Transmit the DIT#2 and DIS#4 to the orbiter w/o special request by
established RF link whenever possible
(2x 200KByte)
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The Ring-buffer mode (DIS imaging)
Image#
34
31
X
32
33
27
28
29
24
25
26
21
22
23
17
18
19
14
15
16
11
12
13
20
7
8
9
4
5
6
1
2
3
#3
#2
#1
10
30
#11
#10
#9
#8
#7
#6
#5
#4
Ring#
C1
C2
C3
B
A
loop
Ring Buffer B -> after 3 loops (configurable)
Ring Buffer A -> after 9 loops (configurable)
Time from start DIS-imaging until (raw) image#30 is ready:
(Exposure time + DMA transfer into the img buffer + Delay between exposures)
(exposure time <1s + 3s DMA + delay 5s (configurable))
= latest moment of starting the DIS mode = 6 minutes before the touch-down window (earliest
moment of TD)
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Memory Allocation Table of RolisIME
RolisDPU:
PROM
EEPROM
RAM page#0
RAM page#1
RAM page#2
RAM page#3
16 KB
64 KB
64 KB
64 KB
64 KB
64 KB
ComDPU S/W; copied to RAM page#0 at power-on
ROLIS S/W, copied to RAM page#0 at ROLIS S/W boot
ComDPU or ROLIS SW, code and data
used for ROLIS-data processing (wavelet compression)
optionally used as ROLIS / ÇIVA TM buffer
(back-up solution) (2 x 32 KByte = 2 x 128 packets))
2 MB
2 MB
2 MB
2 MB
2 MB
2 MB
2 MB
2 MB
Image buffers (RAM);
used for storage of ROLIS raw image + image processing
MEM:
image buffer#0
image buffer#1
image buffer#2
image buffer#3
image buffer#4
image buffer#5
image buffer#6
image buffer#7
img#7 used as ROLIS / ÇIVA TM buffer
(CIVA: 1 MByte + ROLIS: 1 MByte)
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