124 lines
4.8 KiB
TeX
124 lines
4.8 KiB
TeX
\section{General Design Requirements \& Standards and Coordinate Systems}
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\label{sec:interface}
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%--------------------------------------------------------------------------------------------
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\subsection*{R-SC-AHEPaM-040: SI units}
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\label{req:R-040}
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The AHEPaM shall use the SI international system of units in accordance with ECSS-E-31C except where explicitly agreed with the Agency.
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\paragraph{Justification:}
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Compliance.
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\paragraph{Verification:}
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Review of design documentation.
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\paragraph{Comments:}
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None.
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\paragraph{CAU Response:}
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The instrument design complies with the requirement.
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%--------------------------------------------------------------------------------------------
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\subsection*{R-SC-AHEPaM-041: Right-handed coordinate system}
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\label{req:R-041}
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The AHEPaM shall use only right-handed Cartesian coordinate systems.
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\paragraph{Justification:}
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Compliance.
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\paragraph{Verification:}
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Review of cad model.
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\paragraph{Comments:}
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None.
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\paragraph{CAU Response:}
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The instrument design complies with the requirement.
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%--------------------------------------------------------------------------------------------
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\subsection*{R-SC-AHEPaM-043: Moments of Inertia}
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\label{req:R-043}
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The AHEPaM \ac{MoI} shall be determined referring to a coordinate system parallel to the AHEPaM\_PCS and with the origin at the AHEPaM \ac{CoG}.
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\paragraph{Justification:}
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Compliance.
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\paragraph{Verification:}
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Review of cad model.
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\paragraph{Comments:}
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None.
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\paragraph{CAU Response:}
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The MoI values provided comply with the requirement.
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%--------------------------------------------------------------------------------------------
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\subsection*{R-SC-AHEPaM-330: Space environment}
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\label{req:R-330}
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The AHEPaM shall be compatible with the Space environment, as governed by [ATHENA - Environmental Specification].
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\paragraph{Justification:}
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Compliance.
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\paragraph{Verification:}
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Analysis/ Test of specific requirements.
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\paragraph{Comments:}
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None.
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\paragraph{CAU Response:}
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AHEPaM is designed to comply with the given requirements.
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%--------------------------------------------------------------------------------------------
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\subsection*{R-SC-AHEPaM-341: Margin policy}
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\label{req:R-341}
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The AHEPaM shall conform to the margin policy described in [Margin Policy Document] during all development phases.
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\paragraph{Justification:}
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TBC compliance.
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\paragraph{Verification:}
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Review of design documentation.
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\paragraph{Comments:}
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The document \textit{Margin Policy Document} which is stated in the requirement's description is not known to the interface team. Therefore compliance can't be stated. \newline
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However the instrument team likes to comment that a design policy is applied which baselines ECSS-E-ST-10-02C Rev.1, 1 February 2018, Table 5-1. The detailed description can be found in \cite{ahepam-ddv}.
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\paragraph{CAU Response:}
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\acs{TBC} compliant, after ESA's review of the the applied margin philosophy in \cite{ahepam-ddv}.
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%--------------------------------------------------------------------------------------------
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\subsection*{R-SC-AHEPaM-342: \acs{ECSS} Standards}
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\label{req:R-342}
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The AHEPaM shall conform to the published list of ESA approved \acf{ECSS} for the E, Q, and M branch.
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\paragraph{Justification:}
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Compliance
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\paragraph{Verification:}
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Review of documentation referencing to the relevant \ac{ECSS} documents.
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\paragraph{Comments:}
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None.
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\paragraph{CAU Response:}
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Compliant.
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%--------------------------------------------------------------------------------------------
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\subsection*{R-SC-AHEPaM-343: Radiation design margin}
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\label{req:R-343}
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The AHEPaM shall use a \acf{RDM} factor 2 for the assessment of the Total Ionizing Dose effects. %Radiation Design Margin
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\paragraph{Justification:} ESA-ATHENA-ESTEC-PL-SP-0001, ATHENA AHEPaM Specification
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\paragraph{Verification:} Design/Analysis
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\paragraph{Comments:}
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\paragraph{CAU Response:} We will use the state of the art space qualified microcircuits with the highest available radiation tolerance/rating.
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%--------------------------------------------------------------------------------------------
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\subsection*{R-SC-AHEPaM-346: MIL-STD-1553 IF}
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\label{req:R-346}
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The AHEPaM shall support the MIL-STD-1553 interface to/from the spacecraft.
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\paragraph{Justification:} ESA-ATHENA-ESTEC-PL-SP-0001, ATHENA AHEPaM Specification
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\paragraph{Verification:} Design/Analysis
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\paragraph{Comments:} From specification document: "There are four different
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interfaces, MIL-STD-1553, SpaceWire, CAN, Serial. MIL-STD-1553 is the baseline interface to the SC and the other three are offered as options."
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\paragraph{CAU Response:} Unit uses Serial UART over LVDS as its standard communication interface and want to use it as one of the offered options in specification document.
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A persistence of the use of MIL-STD-1553 will require an additional interface board in AHEPaM unit.
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