The compression rate of onboard EIS data may vary depending on a few factors such as the observing target (QS, AR, CH, etc), slit/slot selection, exposures, etc.

The purpose of this study is trying to investigate how different compression schemes effect EIS data volume onboard and work out a better estimation of compression rate for compression scheme (eg. DPCM, JPEG98, JPEG95, etc.)


[{Image src='images/factor/dataVolume_eis.png}]


[{Image src='images/factor/75/JPEG75_only.gif'}]


QS	QS,DC	QS,SYN	QS,CH   QS,NET	QS,DC,XBP	QS,SYN,DC       QS,DC,SEI       QS,PCH

XBP,QS

AR      AR,LMB          AR,EFR          AR,PLG  AR,CH   AR,NFL  AR,CH,LMB

SYN     SYN,DC          SYN,QS,DC

PCH     PCH,LMB,JET     PCH,JET

JET,LMB,PCH

LMB     LMB,LO          LMB,PCH,SPI     LMB,SPI

ENG,LMB,JET,PCH         ENG,QS,DC

SYN,DC,QS       SYN,DC

CH      CH,JET          CH,XBP          CH,DC   CH,LMB          CH,QS           CH,XBP,JET,EFR          CH,BP,JET

PR      PR,LMB          PP,PCH

SPI,LMB

EFR     SEI,EFR

DC      DC,LMB          WAV     NET

SPI     SPI,CH

BP,CH,JET       BP,JET

FIL,PR          FIL,QS