Data Handling System

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=50 BGCOLOR="#333366" TEXT="#080000"> <div> <B>Data Handling System</B></div> <div> </div> </td> </tr><tr> <td valign="top" width=165 BGCOLOR="#CCCC99" TEXT="#080000"> <div> <B> <TABLE BORDER="0" CELLPADDING="2" CELLSPACING="1" WIDTH="132" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 35 ><NOBR><div> <IMG BORDER="0" SRC="1x1.gif" HEIGHT="29" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" WIDTH="21"></div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> <IMG BORDER="0" SRC="1x1.gif" HEIGHT="29" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" WIDTH="21"></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="20"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="35" ALIGN="bottom" WIDTH="20" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP><NOBR><div> <IMG BORDER="0" SRC="1x1.gif" HEIGHT="29" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" WIDTH="13"></div> </NOBR></tD> <tD VALIGN=TOP><NOBR><div> <A HREF="id18.htm" TARGET="_top" TITLE="System Concepts and Structure"><U><B><IMG SRC="0051b1d0.gif" border=0 width="27" height="29" ALT="down" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></U></A></div> </NOBR></tD> </tR> </TABLE></B></div> <div> <B> </B><A HREF="id18.htm" TARGET="_top" TITLE="System Concepts and Structure"><U>System Concepts and Structure</U></A></div> <div> <A HREF="id20.htm" TARGET="_top" TITLE="Software Requirements"><U>Software Requirements</U></A></div> <div> <A HREF="id22.htm" TARGET="_top" TITLE="Architectural Design"><U>Architectural Design</U></A></div> <div> <A HREF="id24.htm" TARGET="_top" TITLE="Reusing the Data Handling Software"><U>Reusing the Data Handling Software</U></A></div> </td> <td valign="top" height=430 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> The data handling system is the central component onboard a satellite responsible for interpretation and distribution of telecommands received from ground and collection of telemetry subsequently sent to ground.</div> <bR> <div> Context Diagram</div> <bR> <div>      <IMG SRC="02797040.gif" border=0 width="663" height="260" ALT="SmartDraw Drawing" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <bR> <div> In the 'Software System Development for Spacecraft Data Handling & Control' project the context of the data handling system is viewed as shown above.</div> <div> The Data Handling System Interfaces to the ground control center through a Communications (COM) subsystem.</div> <div> At the other side, a range of onboard subsystems are situated on an onboard bus. All commands to these and telemetry from these go through the data handling system.</div> </td> </tr></table></body>