Logging Policies and Management at Computer Center, CS, NCTU
The Computer Center at CS, NCTU implements logging policies for efficient management of log files. The process includes syslog, log rotation, archiving, and locating log files in common directories. Various logs such as sshd, httpd, and ftpd are tracked and managed for post tracking purposes. Logs are rotated at periodic intervals, archived, and stored in specific locations for accessibility and monitoring. The system utilizes syslogd, syslog.conf, and related library routines to handle logging and event tracking effectively.
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4b. CCOR GPA Development Overview A. Thernisien, NRL SWFO PGD PDR, August 30, 2021
CCOR Science Observe coronal mass ejections (CMEs), in particular halo CMEs Determine their direction, and speed based on model Ice cream cone, GCS, Estimate CME mass Estimate time arrival at Earth CCOR Performance Requirements CCOR-1 (GOES-U): from 3.7Rsun to 17Rsun, Earth, 50arcsec resolution CCOR-2 (SWFO-L1): from 3.0Rsun to 22Rsun, L1, 70arcsec resolution Cadence: one 2k x 2k image every 15 minutes Latency: <12min transfer to spacecraft Photometric accuracy: <10% Requirement documents: Performance Operational Requirement Document (PORD) CCOR-1: SSD-RQT-CC007 Rev. A CCOR-2: SSD-RQT-CL004 Rev. - R: 4.13, 4.15; C: SDD SWFO PGD PDR, August 30, 2021 CCOR GPA Development Overview Page 2
CCOR Performance Requirements Specifications Requirements CCOR-1 CCOR-2 SSD-RQT-CL004 Rev. - SWFO-L1 WL: 450-750nm 3.0 to 22 Rsun 70 arcsec 2048x1920 pixels 15 min 18 min < 10 % Requirement Doc. (PORD*) SSD-RQT-CC007 Rev. A Spacecraft Bandpass FOV Spatial resolution Image size Cadence Latency Photometric accuracy GOES-U WL: 450-750nm 3.7 to 17 Rsun 50 arcsec 2048x1920 pixels 15 min < 12 min < 10 % 1.0e-11 Bsun 1.0e-11 Bsun Minimum corona intensity * PORD: Performance Operational Requirement Document R: 4.13, 4.15; C: SDD SWFO PGD PDR, August 30, 2021 CCOR GPA Development Overview Page 3
CCOR As Built Specs Slide added in January 2025 Specifications Requirements CCOR-1 CCOR-2 SSD-RQT-CL004 Rev. - SWFO-L1 WL: 450-750nm 3.4 to 25 Rsun 65 arcsec 2048x1920 pixels 15 min 18 min < 10 % Requirement Doc. (PORD*) SSD-RQT-CC007 Rev. A Spacecraft Bandpass FOV Spatial resolution Image size Cadence Latency Photometric accuracy GOES-19 WL: 450-750nm 4.1 to 20 Rsun 40 arcsec 2048x1920 pixels 15 min < 12 min < 10 % Allocated from requirement for total latency to user (both CCORs): < 30 min <1.0e-11 Bsun <1.0e-11 Bsun Minimum corona intensity * PORD: Performance Operational Requirement Document R: 4.13, 4.15; C: SDD SWFO PGD PDR, August 30, 2021 CCOR GPA Development Overview Page 4
