current status of software design for mmo-pwi y. kasahara, t. imachi (kanazawa univ.) and y. kasaba...

Current Status of Current Status of Software Design for Software Design for

MMO-PWIMMO-PWI

Y. Kasahara, T. Imachi (Kanazawa UniY. Kasahara, T. Imachi (Kanazawa Univ.)v.)

and Y. Kasaba (ISAS)and Y. Kasaba (ISAS)

Spe

cific

Mem

ory

area

Hardware - MDP-1/DPU block diagramHardware - MDP-1/DPU block diagram

CPUSynchronous Mem

SDRAM256M Byte

EEPROM256k x 32bit

SRAM512k x 8bit x 4

DMCI/F

SpWI/F

(with 16kB buffer)

Sensors

MDP2

Core Cash

DMC

Ring buffer For Sensors

MMO-SWG #3 [Mar 22 2006] Hardware - SDRAM~ Endless Recorder concept ~

Sensor D TLM

Sensor C TLM

Sensor B TLM

Sensor A TLM

Sensor AMission Data

Sensor BMission Data

Sensor CMission Data

Sensor DMission Data

Sensor A TLM1

Sensor A TLM2

Double buffer(TBD)


Short time buffer


Long time buffer

Ring buffer

For Nominal mission dataTLM data generated in this areaSize : 1 spin data (TBD)

Polling data for triggered event to compare with other sensorsSize : 60 sec data (TBD)

Mission data 49Mission data 50

RMAP Header

TI

Sensor AMission dataUser packet

RMAP Footer

SensorUser data

RMAP read packet

Important : All data including RMAP information data are stored in Mission Data area in SRAM

Dat

a f

rom

Sen

sors

Dat

a-T

LM t

o D

MC

-DR

Raw Data rate to MDP/DPU

4208.74 / 3552.74TOTAL

0.032112HFR　

(0.512)112Phase (option)　

1.0242128 (frq. points /3sec)12TNR　

1.056(+0.512)SORBET

2520360 (kHz)16Waveform/OFA-B

2520EWO - WFC-B

1920 / 10240×0.1260 / 320×0.1 (kHz)16Waveform/OFA-E

1920 / 10240×0.1EWO - WFC-E

2.054３２ (Hz)16Potential　

4.102１２８ (Hz)16Waveform　

7.68EWO - EFD

bit numberData rate (kbps)ChannelSampling rate

Quantifying DataReceiver

（ *1 ）

（ *2 ）

*1) Data rate in the magnetosphere / solar wind. Observation in the solar wind is intermittently performed with duty ratio of 1/10.*2) Data rate in the magnetosphere / solar wind (except for Phase data produced by SORBET)*3) The data for AM2P is included in the WFC-E/OFA-E data.

128 (frq. points /3sec)

64 (frq. points /3sec)

Data Flow in MDPData Flow in MDP

"Low rate mode" (0.2 kbps/ave)Total (before compression): 0.30/0.34kbps- EWO: EFD from WPANT/MEFISTO (TBC) 0.03kbps

Spectrum (10 spin) 8bit x [1-32Hz df=1Hz] x (X/Y/phase) 0.02kbpsE-vector (10 spin) 8bit x (X/Y/RMS) negligiblePotential (10 spin) 16bit x (X1/X2/Y1/Y2) negligible

- EWO: WFC/OFA from WPANT/MEFISTO and LF-SC/DB-SC (TBC) 0.18/0.22kbpsSpectrum-E (10 spin) 8bit x [10Hz-20kHz, 95ch] x (X/Y/phase) 0.08kbps

or 8bit x [10Hz-120kHz, 145ch] x (X/Y/phase) 0.12kbpsSpectrum-B (10 spin) 16bit x [0.1Hz-20kHz, 85ch] x (X/Y/Z/phase) 0.10kbps

- SORBET: from WPANT/DB-SC (TBC) 0.08kbpsThermal Noise Spectrum (24sec) 12bit x [2.5-640kHz, 128ch] x 1ch 0.06kbpsHF Spectrum (24sec) 12bit x [0.5-10.2MHz, 32ch] x 1ch 0.02kbps

- AM2P: from MEFISTO (TBC) 0.01kbpsSpectrum (1min) 8bit x 90ch 0.01kbps

"Medium rate mode" (3 kbps/ave)Total (before compression): 4.23/5.54(+option:0.26)kbps- EWO: EFD from WPANT/MEFISTO (TBC) 0.26kbps

Spectrum (1 spin) 8bit x [1-32Hz df=1Hz] x (X/Y/phase) 0.26kbpsE-vector (1 spin) 8bit x (X/Y/RMS) negligiblePotential (1 spin) 16bit x (X1/X2/Y1/Y2) negligible

- EWO: OFA/WFC from WPANT/MEFISTO and LF-SC/DB-SC (TBC) 3.8/4.6kbpsSpectrum-E (2 spin) 8bit x [10Hz-20kHz, 190ch] x (X/Y/phase) 1.52kbps

or 8bit x [10Hz-120kHz, 290ch] x (X/Y/phase) 2.32kbpsSpectrum-B (2 spin) 8bit x [0.1Hz-20kHz, 190ch] x (X/Y/Z/phase) 2.28kbps

- SORBET: from WPANT/DB-SC (TBC) 0.16/0.67(+option 0.26)kbps

Apo-Mode Thermal Noise Spectrum(12sec) 12bit x [2.5-640kHz, 128ch] x 1ch 0.13kbpsHF Spectrum (24sec) 12bit x [0.5-10.2MHz, 64ch] x 1ch 0.03kbps

Peri-Mode Thermal Noise Spectrum 12bitx[2.5-640kHz,128ch]x(1ch/3sec+1ch/12sec) 0.64kbps Phase (Option) 12bit x [2.5-640kHz, 128ch] x 2ch / 12sec (0.26kbps)

HF Spectrum (24sec) 12bit x [0.5-10.2MHz, 64ch] x 1ch 0.03kbps- AM2P: from MEFISTO (TBC) 0.01kbps

Spectrum (1min) 8bit x 90ch

Overview of the data processing simulatorOverview of the data processing simulator

Buffer for telemetry data

Processed data (Spectrum etc.)

Waveform

Garbage disposal

CPU loadTime delayOptimum buffer allocation & data processing sequence

Concept of Data compressionConcept of Data compression

• Lossy Compression used for waveform data at Bit-H

• Lossless Compression used for spectrum data at Bit-L, M

WaveformN

o.

Algorithm1 Algorithm2 Algorithm3 Algorithm4

CR SNR CC CR SNR CC CR SNR CC CR SNR CC

Data set 1

17.6%

30.42 0.9996

8.6% 30.65 0.9996

8.3% 29.63 0.9995

29.1%

33.39 0.9998

Data set2

20.1%

24.88 0.9984

15.1%

27.04 0.9990

17.4%

29.46 0.9994

41.1%

33.10 0.9998

Evaluation of Evaluation of Lossy CompressionLossy Compression 　　 Algorithm (1)Algorithm (1)

Algorithm 1: QMF Filt (Implemented in SS-520 Rocket exp.)Algorithm 2: QMF Filt + MDCT + VectorizationAlgorithm 3: QMF Filt + MDCT + VectorizationAlgorithm 4: QMF Filt

CR : Compression RatioSNR: S/N RatioCC : Correlation Coefficient (Waveform)SCC: Correlation Coefficient (Spectrum)

Original samples

Spectrogram of Data set 1

Algorithm 1 　 SCC:0.739606 Algorithm 2 　 SCC:0.858291


GEOTAILData1 93/05/26 11:09:34~Data2 96/12/10 16:40:35~

WaveformN

o.



Data set 1

5.69 30.42 0.9996

11.66 30.65 0.9996

12.11 29.63 0.9995

3.43 33.39 0.9998

Data set2

4.98 24.88 0.9984

6.64 27.04 0.9990

5.76 29.46 0.9994

2.43 33.10 0.9998


Original samples



Spectrogram of Data set 2

波形No.



Data set 1

5.69 30.42 0.9996

11.66 30.65 0.9996

12.11 29.63 0.9995

3.43 33.39 0.9998

Data set2

4.98 24.88 0.9984

6.64 27.04 0.9990

5.76 29.46 0.9994

2.43 33.10 0.9998

GEOTAILData1 93/05/26 11:09:34~Data2 96/12/10 16:40:35~


Estimation of CPU LoadEstimation of CPU Load

Add. & Subtract. Multi. & Div. Memory [bit]

Algorithm1 2.58 (1.00) 2.29 (1.00) 37376 (1.00)

Algorithm2 104.71 (40.65) 38.60 (16.85) 302656 (8.09)

Algorithm3 11.56 (4.48) 7.46 (3.26) 302656 (8.09)

Algorithm4 2.60 (1.01) 2.25 (0.98) 37376 (1.00)

Algorithm 1: QMF Filt (Implemented in SS-520 Rocket exp.)Algorithm 2: QMF Filt + MDCT + VectorizationAlgorithm 3: QMF Filt + MDCT + VectorizationAlgorithm 4: QMF Filt

Estimation of Data Compression Ratio (GEOTAIL SFA) for Lossless compression

73%

73%

70%

66%

66%

Average: 69%

Data number vs. Compression ratio (using Adaptive range coder)Data number vs. Compression ratio (using Adaptive range coder)

Entropy: 71%

(No. of increment of table)

A/I for Software designA/I for Software design• Time resolution & rate for each SI

• I/F between MDP & SORBET

• Data management for AM2P

• Definition of HK, CMD, TLM format etc.

• Data triggering/selection

・・・・

current status of software design for mmo-pwi y. kasahara, t. imachi (kanazawa univ.) and y. kasaba...

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ch x 1ch0

x 90ch0

ch x xyphase2

ch x xyzphase2

hz x xyphase0

kbpshf spectrum 24sec12bit

phase data