ROLIS status and plans for SDL & FSS

W. Bresch

S. Mottola

R. Schrödter

PHILAE Science Team Meeting , Venezia, 31 March 2009

Folie 2PHILAE Science WS > W.Bresch > ROLIS > Venezia, 31-March-2009

ROLIS tests during commissioning & cruise

tested ROLIS feature mode when tested will be tested

Image w/o illumination, with IFL DIT since Comm#2 Image with illumination by LED array, with IFL

since Comm#2

Image with illumination by LED array, with IFL, auto-exposure

PC#4

Image with illumination by LED array, w/o IFL

CUC PC#6 PC#12

DIS-imaging DIS PC#10 Full-frame image (stripe) since Comm#4 EEPROM CS verification since Comm#2 EEPROM refresh PC#8 PC#12 S/W Upload (patching) PC#4

Folie 3PHILAE Science WS > W.Bresch > ROLIS > Venezia, 31-March-2009

Rosetta

Folie 4PHILAE Science WS > W.Bresch > ROLIS > Venezia, 31-March-2009

ROLIS imagew/o IFL

at RolisD switch-on

temperature

- 72°C

(min. -93°C

up to now)

Folie 5PHILAE Science WS > W.Bresch > ROLIS > Venezia, 31-March-2009

ROLIS/CIVA imaging during S-D-L & FSS

Separ.Time LandingTime Operation RemarkTR + 0:00:00 SEPARATION Lander // OrbiterTR + 0:03:30 CivaP imaging TBC; 2 im ages at 1 Mbit/im age

TR + 0:17:00 (TL - 0:11:00) Rolis DIT image#1 1st DIT-image incl.transfer to orbiter

TR + 0:19:00 (TL - 0:09:00) Rolis DIT image#2 2nd DIT-image incl.transfer to orbiter

TR + 0:22:00 (TL - 0:06:00) RolisD_DIS imaging Ring-buffer-mode; data trans fer after Touch-Down (4 DIS im ages)

(TR + tbd) TL + 0:00:00 (latest moment of) Touch-Down => RolisD OFF + s tarts RolisData Process ing of 4 DIS im ages and trans fer to CDMS

TL + 0:01:00 Lander complete operational lates t m om ent of getting operational after nom inal Touch-down

TL + 0:01:00 RolisDescentStop em ergency TC for stopping DIS-m ode (im m ediate TC) as last chance (TBC)

TL + 0:01:30 RolisDescentCheckR TC to finish DIS m ode in case that Rolis IME was reseted (re-booted) during TD

CivaP imaging 7 im ages at 1 Mbit/im age (tbc)

TL + 0:08:30 Rolis CUC image_R firs t CUC-raw im age w/o data trans fer to CDMS; auto-exposure

Rolis CUC image_G Green CUC-raw im age w/o data trans fer to CDMS; auto-exposure

Rolis CUC image_dark dark CUC-raw im age w/o data trans fer to CDMS

Rolis CUC image_B Blue CUC-raw im age w/o data trans fer to CDMS; auto-exposure

Rolis CUC image_IR IR CUC-raw im age w/o data trans fer to CDMS and closes IFL; auto-exposure

RolisD_off => RolisD OFF

5x CUC_P&T CUC im age_process ing and trans fer to CDMS (5 im ages)

Compr1_DIT#2 2nd tim e com pressed im age DIT#2 to CDMS

Compr1_DIS#4 2nd tim e com pressed im age DIS#4 to CDMS

WaitDataComplete WAIT for Trans fer-Ready

Folie 6PHILAE Science WS > W.Bresch > ROLIS > Venezia, 31-March-2009

Image Buffer configuration for S-D-L and FSS

image buffer#0 2 MB used for DIT#1 image storage + processing image buffer#1 2 MB used for DIT#2 image storage + processing image buffer#2 2 MB used as ring-buffer A for DIS image storage + processing image buffer#3 2 MB used as ring-buffer B for DIS image storage + processing image buffer#4 2 MB used as ring-buffer C1 for DIS image storage + processing image buffer#5 2 MB used as ring-buffer C2 for DIS image storage + processing image buffer#6 2 MB used as ring-buffer C3 for DIS image storage + processing image buffer#7 2 MB img#7 used as ROLIS / ÇIVA TM buffer

(CIVA: 1 MByte + ROLIS: 1 MByte) image buffer#0 2 MB used for CUC#1 image storage + processing image buffer#2 2 MB used for CUC#2 image storage + processing image buffer#4 2 MB used for CUC#3 image storage + processing image buffer#5 2 MB used for CUC#4 image storage + processing image buffer#6 2 MB used for CUC#5 image storage + processing

Folie 7PHILAE Science WS > W.Bresch > ROLIS > Venezia, 31-March-2009

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)

Folie 8PHILAE Science WS > W.Bresch > ROLIS > Venezia, 31-March-2009

The Ring-buffer mode (DIS imaging) Image# Ring# 34 31 27 24 21 17 14 11 7 4 1 C1 X 32 28 25 22 18 15 12 8 5 2 C2 33 29 26 23 19 16 13 9 6 3 C3 20 10 B 30 A #11 #10 #9 #8 #7 #6 #5 #4 #3 #2 #1 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)

Folie 9PHILAE Science WS > W.Bresch > ROLIS > Venezia, 31-March-2009

Memory Allocation Table of RolisIME

RolisDPU:

PROM 16 KB ComDPU S/W; copied to RAM page#0 at power-on EEPROM 64 KB ROLIS S/W, copied to RAM page#0 at ROLIS S/W boot RAM page#0 64 KB ComDPU or ROLIS SW, code and data RAM page#1 64 KB used for ROLIS-data processing (wavelet compression) RAM page#2 64 KB RAM page#3 64 KB

optionally used as ROLIS / ÇIVA TM buffer (back-up solution) (2 x 32 KByte = 2 x 128 packets))

MEM:

image buffer#0 2 MB image buffer#1 2 MB image buffer#2 2 MB image buffer#3 2 MB image buffer#4 2 MB image buffer#5 2 MB image buffer#6 2 MB

Image buffers (RAM); used for storage of ROLIS raw image + image processing

image buffer#7 2 MB img#7 used as ROLIS / ÇIVA TM buffer (CIVA: 1 MByte + ROLIS: 1 MByte)