QB50 System Requirements Document

TITLE: QB50 m-NLP Science Unit Interface Control DocumentDoc. No. MSSL-QB50-ID-12001-DRAFT a5.4 Example SU Command Sequence ScriptAn example of the user-readable ASCII command sequence script is shown below:TBITBITBITBITBITBITBITBITBITBITBITBITBITBITBITBITable 5-2 - SU Commanding Script ExampleNOTES:1) Commands prefixed by “OBC_” are addressed to the OBC script handler tointerpret and execute.2) Commands prefixed by “SU_” are to be sent to the Science Unit.3) The TIME field “@t” is NOT sent to the SU, but interpreted by the OBC as thetime at which the script command is to be executed. When “@t” is set to“@NOW”, the OBC shall execute the command immediately.4) The RDY flag will be asserted in response to SU_SM, SU_STIM, SU_HCcommands, and the OBC shall collect the SU data packet, time-stamp thepacket, and store it to local mass-storage for download when required.The above ASCII script is parsed by the SCRIPT_ENCODER tool that shall produce theencoded BYTE packet of the script to be uplinked to the CubeSat.5.5 Data Handling and ControlTBDPage 22 of 27