\contentsline {section}{\numberline {1}{\bf Introduction to the Yohkoh Instruments}}{1}
\contentsline {subsection}{\numberline {1.1}Yohkoh Observing Modes}{1}
\contentsline {subsection}{\numberline {1.2}Bragg Crystal Spectrometer (BCS)}{1}
\contentsline {subsubsection}{\numberline {1.2.1}Instrument Modes}{1}
\contentsline {subsection}{\numberline {1.3}Hard X-Ray Telescope (HXT)}{1}
\contentsline {subsection}{\numberline {1.4}Soft X-Ray Telescope (SXT)}{1}
\contentsline {subsubsection}{\numberline {1.4.1}Sequence Tables}{2}
\contentsline {subsubsection}{\numberline {1.4.2}Automatic Exposure Control (AEC)}{3}
\contentsline {subsubsection}{\numberline {1.4.3}Automatic Region Selection (ARS)}{3}
\contentsline {subsection}{\numberline {1.5}Wide Band Spectrometer (WBS)}{4}
\contentsline {subsection}{\numberline {1.6}Spacecraft Attitude Control System (ACS)}{5}
\contentsline {section}{\numberline {2}{\bf Bragg Crystal Spectrometer (BCS)}}{6}
\contentsline {subsection}{\numberline {2.1}Instrument Characteristics}{6}
\contentsline {subsubsection}{\numberline {2.1.1}Wavelength Range}{6}
\contentsline {subsubsection}{\numberline {2.1.2}Data Compression}{6}
\contentsline {subsection}{\numberline {2.2}Instrument Calibration}{7}
\contentsline {subsubsection}{\numberline {2.2.1}Sensitivity Functions}{7}
\contentsline {subsubsection}{\numberline {2.2.2}Wavelength Resolution}{8}
\contentsline {subsection}{\numberline {2.3}Detector Performance}{8}
\contentsline {subsubsection}{\numberline {2.3.1}Detector Gain and Energy Resolution}{8}
\contentsline {subsubsection}{\numberline {2.3.2}Position Resolution}{8}
\contentsline {subsubsection}{\numberline {2.3.3}Digitization Spikes}{9}
\contentsline {subsection}{\numberline {2.4}Detector Background}{9}
\contentsline {subsubsection}{\numberline {2.4.1}Energy Discrimination}{9}
\contentsline {subsubsection}{\numberline {2.4.2}Particle Background}{9}
\contentsline {subsubsection}{\numberline {2.4.3}Germanium Fluorescence}{9}
\contentsline {subsubsection}{\numberline {2.4.4}Effect of Gain Depression}{9}
\contentsline {subsection}{\numberline {2.5}Dynamic Range and Count Rate Effects}{10}
\contentsline {subsubsection}{\numberline {2.5.1}Deadtime Correction}{10}
\contentsline {subsubsection}{\numberline {2.5.2}Saturation}{10}
\contentsline {subsubsection}{\numberline {2.5.3}Gain Depression}{11}
\contentsline {subsubsection}{\numberline {2.5.4}Rate-dependent Distortion}{11}
\contentsline {subsection}{\numberline {2.6}Data Features}{11}
\contentsline {subsubsection}{\numberline {2.6.1}Queued Data}{11}
\contentsline {subsubsection}{\numberline {2.6.2}Timing of Spectra}{11}
\contentsline {subsubsection}{\numberline {2.6.3}Last Spectral Bin}{12}
\contentsline {subsubsection}{\numberline {2.6.4}Medium-rate Spectral Data in Autumn 1991}{12}
\contentsline {subsubsection}{\numberline {2.6.5}Single Event Upsets}{12}
\contentsline {subsection}{\numberline {2.7}Contact Persons}{12}
\contentsline {subsection}{\numberline {2.8}References}{12}
\contentsline {section}{\numberline {3}{\bf Hard X-Ray Telescope (HXT)}}{13}
\contentsline {subsection}{\numberline {3.1}Overview}{13}
\contentsline {subsection}{\numberline {3.2}General information}{13}
\contentsline {subsubsection}{\numberline {3.2.1}Observations with HXT}{13}
\contentsline {subsubsection}{\numberline {3.2.2}Detector gain calibration}{13}
\contentsline {subsubsection}{\numberline {3.2.3}Background counts}{14}
\contentsline {subsection}{\numberline {3.3}Some detailed information}{14}
\contentsline {subsubsection}{\numberline {3.3.1}Modulation patterns}{14}
\contentsline {subsubsection}{\numberline {3.3.2}Spectral Energy Response}{15}
\contentsline {subsubsection}{\numberline {3.3.3}Pre-storage of HXT data in DP}{15}
\contentsline {subsubsection}{\numberline {3.3.4}Data compression}{15}
\contentsline {subsection}{\numberline {3.4}Contact Persons}{16}
\contentsline {subsection}{\numberline {3.5}References}{16}
\contentsline {section}{\numberline {4}{\bf Soft X-Ray Telescope (SXT)}}{17}
\contentsline {subsection}{\numberline {4.1}Overall Response Function for SXT}{17}
\contentsline {subsubsection}{\numberline {4.1.1}CCD Camera Signal}{17}
\contentsline {subsubsection}{\numberline {4.1.2}SXT Effective Area}{21}
\contentsline {subsubsection}{\numberline {4.1.3}Reading the SXT Effective Area File}{22}
\contentsline {subsubsection}{\numberline {4.1.4}SXT Response to Thermal Plasma}{22}
\contentsline {subsubsection}{\numberline {4.1.5}Reading the SXT Response Function File}{23}
\contentsline {subsubsection}{\numberline {4.1.6}Relative Alignment of X-Ray and Optical Images}{24}
\contentsline {subsection}{\numberline {4.2}The CCD Camera}{25}
\contentsline {subsubsection}{\numberline {4.2.1}Saturation Effects }{25}
\contentsline {subsubsection}{\numberline {4.2.2}Effect of CCD Contamination}{25}
\contentsline {subsubsection}{\numberline {4.2.3}SXT Images Taken with the CCD Warm }{26}
\contentsline {subsubsection}{\numberline {4.2.4}Artifacts in Optical Images from Radiation Damage }{26}
\contentsline {subsubsection}{\numberline {4.2.5}SAA Effects on Images }{26}
\contentsline {subsubsection}{\numberline {4.2.6}Subtleties of Background Subtraction }{26}
\contentsline {subsubsection}{\numberline {4.2.7}Charge Bleed-back}{27}
\contentsline {subsubsection}{\numberline {4.2.8}CCD Pixelization}{27}
\contentsline {subsubsection}{\numberline {4.2.9}What is Really Zero Signal Level in Data Numbers (DN)?}{27}
\contentsline {subsection}{\numberline {4.3}The Mirror, Lens or Filters}{28}
\contentsline {subsubsection}{\numberline {4.3.1}Scattering by ND X-ray Filter }{28}
\contentsline {subsubsection}{\numberline {4.3.2}Point Spread Function }{28}
\contentsline {subsubsection}{\numberline {4.3.3}Mirror Scatter }{28}
\contentsline {subsubsection}{\numberline {4.3.4}Vignetting Correction}{29}
\contentsline {subsubsection}{\numberline {4.3.5}Stray Visible Light}{30}
\contentsline {subsection}{\numberline {4.4}Other Instrument and Operations Features}{31}
\contentsline {subsubsection}{\numberline {4.4.1}Data Compression}{31}
\contentsline {subsubsection}{\numberline {4.4.2}Use of Low-8 Images in Optical Data}{31}
\contentsline {subsubsection}{\numberline {4.4.3}Filter Alternation During AEC}{32}
\contentsline {subsubsection}{\numberline {4.4.4}The Roll Angle in the SXT Images}{32}
\contentsline {subsubsection}{\numberline {4.4.5}Incorrect Location of Image Pieces in Some PFIs}{32}
\contentsline {subsubsection}{\numberline {4.4.6}Preparation of SFD images}{33}
\contentsline {subsection}{\numberline {4.5}Contact Persons}{33}
\contentsline {subsection}{\numberline {4.6}References}{33}
\contentsline {section}{\numberline {5}{\bf Wide Band Spectrometer (WBS)}}{34}
\contentsline {subsection}{\numberline {5.1}Basic Instrument Characteristics}{34}
\contentsline {subsection}{\numberline {5.2}Soft X-Ray Spectrometer (SXS)}{34}
\contentsline {subsection}{\numberline {5.3}Hard X-Ray Spectrometer (HXS)}{35}
\contentsline {subsection}{\numberline {5.4}Gamma-Ray Spectrometer (GRS)}{35}
\contentsline {subsection}{\numberline {5.5}WBS Output Data}{36}
\contentsline {subsection}{\numberline {5.6}Contact Persons}{37}
\contentsline {subsection}{\numberline {5.7}References}{38}
\contentsline {section}{\numberline {6}{\bf Spacecraft Attitude, Ephemeris and Coordinate Systems}}{39}
\contentsline {subsection}{\numberline {6.1}Spacecraft Attitude Control System (ACS)}{39}
\contentsline {subsubsection}{\numberline {6.1.1}Inertial Reference Unit (IRU)}{39}
\contentsline {subsubsection}{\numberline {6.1.2}Two-dimensional Fine Sun Sensor (TFSS)}{39}
\contentsline {subsubsection}{\numberline {6.1.3}Star Tracker (STT)}{39}
\contentsline {subsubsection}{\numberline {6.1.4}Geomagnetic Sensors (GAS)}{39}
\contentsline {subsubsection}{\numberline {6.1.5}HXT Aspect Sensor (HXA)}{39}
\contentsline {subsubsection}{\numberline {6.1.6}Attitude Determination Software (ADS)}{39}
\contentsline {subsection}{\numberline {6.2}ACS Performance}{39}
\contentsline {subsubsection}{\numberline {6.2.1}Pointing Accuracy}{39}
\contentsline {subsubsection}{\numberline {6.2.2}Spacecraft Jitter}{39}
\contentsline {subsubsection}{\numberline {6.2.3}Sensor Problems}{40}
\contentsline {subsection}{\numberline {6.3}Instrument and Spacecraft Co-alignment}{40}
\contentsline {subsection}{\numberline {6.4}Spacecraft Ephemeris}{40}
\contentsline {subsection}{\numberline {6.5}Contact Persons}{40}
\contentsline {subsection}{\numberline {6.6}References}{40}
\vspace {0.2cm}
\contentsline {section}{\numberline {A}{\bf Details on the Time Tags on the Data}}{41}
\contentsline {subsection}{\numberline {A.1}Bragg Crystal Spectrometer (BCS)}{41}
\contentsline {subsection}{\numberline {A.2}Hard X-Ray Telescope (HXT)}{41}
\contentsline {subsection}{\numberline {A.3}Soft X-Ray Telescope (SXT)}{42}
\contentsline {subsection}{\numberline {A.4}Wide Band Spectrometer (WBS)}{43}
\contentsline {section}{\numberline {B}{\bf Details of the SXT CCD Pixels}}{45}
\contentsline {section}{\numberline {C}{\bf Dates of Significant SXT Activities}}{46}
\contentsline {subsection}{\numberline {C.1}Dates that SXT CCD was Baked Out}{46}
\contentsline {subsection}{\numberline {C.2}Table of Number of SXT Images and Dark Current Levels}{47}
\contentsline {subsection}{\numberline {C.3}Dates of SXT Entrance Filter Failures}{49}
\contentsline {section}{\numberline {D}{\bf Attitude Control System (ACS) Related Items}}{50}
\contentsline {subsection}{\numberline {D.1}Dates When Yohkoh was at non-zero Roll}{50}
\contentsline {section}{\numberline {E}{\bf Miscellaneous Yohkoh Information}}{51}
\contentsline {subsection}{\numberline {E.1}Amount of Yohkoh Data per Week}{51}
\contentsline {section}{\numberline {F}{\bf Web Version of the YAG}}{54}