Claude Skills by ashfordeOU

Use when planning or auditing a solar-array coupon cycling run. Execute the thermal-cycling qualification of a photovoltaic-assembly coupon under ECSS-E-ST-20-08C clause 5.5.1.3.4: derive the cycle count from the eclipse rate of the mission orbit regime, the mission duration and the qualification factor against a policy floor, widen the predicted on-orbit extremes by the temperature margin and refuse a profile the coupon materials are not declared to survive, size the ramp and the stabilisati...

Use when the task is sizing or reviewing that run: derive the in-orbit cycle count from the orbit period, the mission duration and the eclipse fraction, form the crack-growth equivalence between the in-orbit swing and the wider test swing, convert it into a required test-cycle count, check the test extremes envelope the predicted extremes with their margin, bound the transition ramp and the dwell, and confirm every flight component and process family appears on the cycled article. Compute the...

Use when post-ultraviolet measurements are judged against the accepted loss. Verify that a photovoltaic specimen still respects its short circuit current limit once the ultraviolet exposure sequence has ended, per ECSS-E-ST-20-08C clause 6.4.3.15.3: confirm the accumulated dose completed the sequence, correct the pre-exposure and post-exposure illuminated readings back to reference irradiance and cell temperature so the comparison is between specimen states rather than measurement conditions,...

Use when a dosimetry record behind an ultraviolet exposure is being written or reviewed. Determine whether an accelerated ultraviolet exposure actually measured the integrated ultraviolet photon intensity at the test item position, per ECSS-E-ST-20-08C clause 6.4.3.15.2: integrate the spectral irradiance over the reported band with interpolated edges, convert those watts into a photon rate, refer the sensor reading to the item plane through the inverse-square distance ratio and the plane tilt...

Use when an accelerated ultraviolet exposure is being scoped or defended for a solar array assembly. Determine what an accelerated ultraviolet exposure must deliver before a photovoltaic assembly can be called stable under ultraviolet light, per ECSS-E-ST-20-08C clause 6.4.3.15.1: inventory the ultraviolet-sensitive elements of the stack and the degradation each one contributes, size the mission dose in equivalent sun hours from mission duration, solar distance and illuminated fraction, deriv...

Use when accepting or rejecting a vacuum-cycled coupon. Evaluate how far a photovoltaic coupon may degrade after vacuum thermal cycling under ECSS-E-ST-20-08C clause 5.5.3.11.3: report the pre-cycling and post-cycling illuminated readings back to reference irradiance and cell temperature, form the loss fraction of maximum power, short-circuit current and open-circuit voltage against their own allowances, then judge the post-cycling insulation resistance against its floor, against the decades ...

Use when planning or auditing the in-situ monitoring of a vacuum cycling campaign. Identify which components of a photovoltaic article are watched for electrical continuity throughout a vacuum thermal-cycling run, per ECSS-E-ST-20-08C clause 5.5.3.11.2: separate the declared items that carry a current path from the ones no continuity monitor can watch, give each of the first group its own monitor channel and compare the demand with the channels available, size the sampling interval so the sho...

Use when scoping or reviewing a solar-array vacuum cycling campaign. Determine why a photovoltaic assembly is cycled in vacuum rather than in air under ECSS-E-ST-20-08C clause 5.5.3.11.1, and whether the planned run serves that purpose: group every declared component, assembly and interface into the survival objective the run makes it demonstrate, mark the items whose failure mode only exists once the air is gone, confirm the cycled article actually carries each declared item, then check the ...

Use when a qualification population needs its applicability envelope fixed before any defect call is dispositioned. Determine which solar cell assemblies the visible defect requirements actually govern when a qualification approval is being granted under ECSS-E-ST-20-08C clause 6.4.3.1.1: separate items put forward for an approval from those circulated for information or running against lot acceptance, check each assembly category against the declared applicable set, send an item built to an ...

Use when an inspection outcome has to be defended against an agreed and documented criteria set. Validate the supplier-defined visual acceptance criteria for every component of a photovoltaic assembly under ECSS-E-ST-20-08C clause 5.5.3.2.3, then screen a coupon against them: check each criterion carries a positive limit, a unit consistent with its kind, an inspection method, a customer-agreement state and the document it was agreed in; report components left with no criteria at all; reduce t...

Use when a welded assembly has been examined and the drawing is the authority the record has to answer to. Verify the welds at solar-array string terminations and terminals against the assembly control drawing under ECSS-E-ST-20-08C clause 5.5.3.2.14: match every inspected location to its drawing entry, compare the welds present with the count the drawing calls for, resolve each weld's offset from its drawn position and its nugget diameter against the drawing band, grade cracked, expelled and...

Use when a harness has been examined after its acceptance tests and the record needs a disposition. Verify that a solar-array harness is free of the wiring faults excluded once acceptance testing is complete under ECSS-E-ST-20-08C clause 5.5.3.2.12: read a bend against the minimum radius the cable category allows in its own diameters, a twisted run against a turns-per-metre allowance, a crease against how round the jacket still is, treat a kink as permanent set in the conductor, grade chafe, ...

Use when an irradiance sweep must become a linearity verdict. Assess the linearity of a secondary working standard by the method the referenced photovoltaic standard sets out, for ECSS-E-ST-20-08C clause 10.2.2.3.3: turn each short-circuit-current reading into a responsivity per unit irradiance, anchor a reference responsivity on the points taken at the reference irradiance, express every other point as a deviation from it, fit current against irradiance by least squares so a non-zero interce...

Use when repeat intercomparison readings must become a per-standard stability verdict. Determine whether a group of secondary working standards has drifted in sensitivity under ECSS-E-ST-20-08C clause 10.2.2.3.2: normalise every short-circuit-current reading to the reference temperature, require at least five standards read in each session, ratio each device against the session median so an unknown source level cancels out, track that ratio across sessions, derive total and per-year drift by ...

Use when traceability of a working standard to a primary reference must be shown current. Audit the periodic correlation that keeps a daily-use solar-array working standard tied to a primary reference, per ECSS-E-ST-20-08C clause 10.2.2.3.5: count the days since the last correlation against the agreed interval and separate approaching from passed, read each correlation as a ratio of working reading to reference reading, size the drift from the baseline and between consecutive ones, combine th...

Use when a working standard needs a fitness-for-transfer visual disposition. Evaluate a secondary working standard against the visible defect rules written for solar cells and cell assemblies under ECSS-E-ST-20-08C clause 10.2.2.3.1: resolve the construction of the device, derive which cell-level and assembly-level rule families actually reach it, disposition each observed defect against an allowance derived from the device's own active area rather than a typed-in figure, refer an observation...

Use when a reference cell must be read on a flash simulator rather than a steady-state source. Verify that a solar-array working standard answers fast enough in short-circuit mode to be read under a pulsed simulator, per ECSS-E-ST-20-08C clause 10.2.2.3.4: form the short-circuit time constant from the cell capacitance and the loop resistance, size the settling the declared tolerance demands, place the sampling window inside the flash plateau and after that settling, hold the shunt voltage dow...

Evaluate whether a second series switch really lets a power line be opened when the main switch stays on. Use when an ECSS-E-ST-20-20C clause 5.2.13.3.1 line needs its additional commandable switch justified: confirm the extra device sits in series rather than in parallel, that its command path and drive domain are separate from the main switch, that it carries the derated line current, holds off the derated bus voltage and can break the prospective fault current, add the two conduction drops...

Determine where an additional commandable switch belongs along a power line. Use when an ECSS-E-ST-20-20C clause 5.2.13.4.1 layout has to put the extra switch on the power system side of the main switch: walk the ordered source-to-load node list, keep the mountable nodes upstream of the main switch, measure the live harness stub each candidate would leave between the power system output and itself, measure the length it de-energises, drop any candidate above the stub limit or inside the minim...

Determine whether a dissipative switch failure still has protection once both earlier provisions have been ruled out, per clause 5.2.14.3.1 of ECSS-E-ST-20-20C. Use when the derated continuous rating cannot absorb the stuck-on case and no off-command path survives the failure: test each provision on its own terms, demand a backup only where neither holds, match the backup to the mode it genuinely covers, refuse one sharing a part with the switch it protects, and race its action time against t...

Assess a centralised undervoltage protection that serves several current limiters for single point failure tolerance under clause 5.2.5.3.1 of ECSS-E-ST-20-20C. Use when one sensing and voting chain arms or trips the undervoltage protection of a whole distribution unit. Walk each redundancy stage as a k-of-n vote, remove one unit at a time, and test both directions: whether the surviving units still protect every limiter served, and whether one unit failing active trips the bus on its own. Re...

Verify that the current sensing element of a power protection device sits on the energised main bus side. Use when an LCL, HLCL or fold-back limiter is reviewed against ECSS-E-ST-20-20C clause 5.2.3.3.1: enumerate every current the branch draws with its origin and its return route, work out which ones actually cross the sensing element in its declared position, name the fault currents that bypass it, convert the sensed share into the real branch current needed to reach the trip threshold, and...

Verify that the current telemetry of a protected power output still reads at the point its protection device limits, against clause 5.2.8.3.1 of ECSS-E-ST-20-20C. Use when a latching or fold-back limiter output carries a shunt, amplifier and converter chain and the question is whether the reported current reaches the worst-case maximum limitation current: build that limit from the class current, the limiting ratio and the arithmetic sum of tolerance, temperature, ageing, radiation and supply ...

Evaluate whether an output current telemetry reports linearly and holds its absolute accuracy against the class current of the device over its whole range, per clause 5.2.8.4.1 of ECSS-E-ST-20-20C. Use when a calibration set of applied against reported currents has to become a verdict rather than a plot: divide every signed error by the class current instead of by the reading or by full scale, take the worst point rather than a mean, split the departure into gain error, zero offset and residu...

Determine whether the offset of a reported output current is expressed against the class current of the device, as clause 5.2.8.5.1 of ECSS-E-ST-20-20C fixes it, and whether it stays inside its allowance. Use when a datasheet or a test report states a telemetry zero offset on some other basis and the number has to be made comparable: normalise the declared basis, refuse a percentage of reading outright because an offset lives at zero applied current, restate a full-scale or absolute figure ag...

Evaluate whether the parts around a current limiter survive a switch that fails dissipatively while nothing else removes it, under clause 5.2.14.1.1 of ECSS-E-ST-20-20C. Use when a limiter switch is stuck in its limitation region and the dissipation runs indefinitely into the board and the neighbouring components. Compute the steady dissipation from the drop and the limited current, raise every named part through its own thermal coupling, compare each against its derated rating, report the su...

Assess an adjustable turn on threshold that is expressed against the maximum direct current bus voltage, per clause 5.4.4.2.1 of ECSS-E-ST-20-20C. Use when an enable setting is quoted as a fraction and the reference behind that fraction decides the volts it really commands. Refer each settable fraction into volts through the maximum bus value, restate a fraction quoted against the nominal bus onto the maximum reference, report the volts a reader loses by taking the wrong one, and test the res...

Evaluate an adjustable turn on threshold that is set as a percentage of the nominal main bus voltage, per clause 5.4.4.1.1 of ECSS-E-ST-20-20C. Use when a unit declares an enable setting ladder and the range it spans has to be shown against the percentages the project asks for. Refer every setting back into volts through the nominal main bus, walk the ladder from its lowest step to its highest, and test the coverage of the required band, the volts one step buys, and whether each setting lands...

Audit which command paths may switch off the retrigger behaviour of a limiter feeding an essential spacecraft load, under ECSS-E-ST-20-20C clause 5.2.6.4.1. Use when a power architecture has to show that this authority stays on the ground: refuse essentiality asserted with no rationale reference, sort each path by where the command originates rather than where it executes so an uplinked time-tagged sequence still counts, name every essential limiter an onboard decision could disable, and coun...

Verify that a failed current limiter puts no fault effect onto the distribution bus or a neighbouring output line, per clause 5.2.7.3.1 of ECSS-E-ST-20-20C. Use when a containment argument has to hold for every way a limiter fails and not just the convenient one: trace failing conducting, failing open, losing the limiting function and oscillating apart, keep a barrier to the modes it genuinely covers, turn the uncontained fault current into a bus droop across the source impedance, and refuse ...

Verify that a load filter finishes charging well inside the shortest trip time a limiter can produce, per ECSS-E-ST-20C clause 5.4.2.3.1. Use when the separation has to be evaluated at the corner that actually binds rather than at the schematic numbers: raise the filter capacitance by tolerance and end-of-life drift, drop the limitation current to the bottom of its band, take the bus at its upper voltage, form the constant-current charge time, shorten the fastest trip time by its own toleranc...

Verify the inductive-current freewheeling provision of ECSS-E-ST-20-20C clause 5.2.7.7.1. Use when a current limiter feeds an inductive load over a long harness and the branch has to keep conducting the instant the limiter opens: sum the load and harness inductance, size the energy trapped at the limitation current, categorize the declared return path as absent, load-freewheel-diode, switch-clamp or active-clamp, derive the decay time and the peak the switching element then stands off, compar...

Compute whether the input filter of a protected load finishes charging inside the charging window it is allowed while its feeding limiter holds the current. Use when an ECSS-E-ST-20-20C clause 5.3.2.3.1 load design has to show the filter energises in time: total the filter stage capacitances the bus actually sees, take the load draw during charging off the held limiting current, charge that total at what is left, and compare against the allowed window with the project margin applied. Refuses ...

Determine which latching current limiter class a protected load belongs on. Use when an ECSS-E-ST-20-20C clause 5.2.1.1.1 power-distribution design has to take an LCL class from the project class table and show the associated performance figures are met: derate each class continuous rating, keep the classes that carry the steady load, charge the load capacitance at the worst-case lower limiting current and check the charge completes inside the shortest trip-off delay, confirm the upper limiti...

Evaluate whether an LCL or HLCL pass element stays inside its component ratings while it holds current limitation. Use when a limiter branch is assessed against ECSS-E-ST-20-20C clause 5.2.3.4.1: confirm the demand really drives limitation, take the voltage the element stands off and the limited current it carries, compute the dissipation and the energy over the trip-off delay, raise the junction through the transient thermal path, and compare current, voltage and junction against derated rat...

Verify that a latching or high power current limiter accepts external commands to switch its output on and off, per clause 5.2.6.1.1 of ECSS-E-ST-20-20C. Use when an LCL or HPC channel definition has to be graded before its command interface is frozen. Confirm that both an on command and an off command exist, that each reaches the channel from an external source rather than internal logic alone, and that the declared pulse width clears the minimum the channel accepts. Then run command sequenc...

Evaluate whether latching and high power limiters come up with their output off, and whether any channel that does not has argued its way there, per clause 5.2.7.2.1 of ECSS-E-ST-20-20C. Use when a recommendation rather than a hard requirement governs the power-up state: tell an off default from an accidental one with no positive enable, separate a departure carrying a rationale, an assessed criticality and compensating provisions from a bare declaration, and add up the inrush every defaultin...

Evaluate whether a latching current limiter rides out repeated overload cycles inside its rating and derating limits, for ECSS-E-ST-20-20C clause 5.2.10.1.1: confirm the faulted load really drives the limiter into current limitation, resolve the pass-element dissipation and per-trip energy at the regulated output voltage, propagate a single-pole junction model through the commanded re-closure train to its settled peak, then grade settled junction temperature, limiting-current derating, averag...

Determine which compliance method discharges each protection-device requirement under ECSS-E-ST-20-20C clause 4.1. Use when a requirement list has to become an auditable verification matrix rather than a statement of intent: refuse a method token outside the declared vocabulary, refuse a requirement carrying none at all, reject a duplicate identifier, insist that a requirement fixing a number is discharged by test or analysis and not by design review alone, take the covered and evidence-beari...

Calculate the voltage a protected distribution line loses at its class current. Use when an ECSS-E-ST-20-20C clause 5.4.5.1.1 power line has to be shown inside the drop its class allows: take the class current from the class table, raise every resistive contributor to its hot value, sum the limiter switch element, the sense shunt, the harness, the connector contacts and any series blocking device, apply the declared tolerance factor, then compare against the ceiling and report the margin, the...

Verify a protected line operates normally at every load capacitance up to the tabulated maximum of its class. Use when ECSS-E-ST-20-20C clause 5.2.19.2.1 asks a design to cover the whole capacitance range rather than one declared part value: derate the declared bulk capacitance for initial tolerance, temperature, ageing and DC bias into a worst-case effective maximum, take the smallest class whose tabulated capacitance covers it, sweep from nothing to that tabulated maximum charging at the lo...

Verify that the DC/DC converters inside a protected load get themselves started without ever drawing more than the current their protection class allows. Use when an ECSS-E-ST-20-20C clause 5.3.2.2.1 load design has to show the internal converters energise inside the class current: build each converter start-up draw from its input capacitance, soft-start ramp and settled draw, lay the release delays on one timeline, read the true aggregate peak instead of summing peaks, and compare against th...

Verify that a current limiter operates normally across every load inductance up to the specified maximum, under ECSS-E-ST-20-20C clause 5.2.19.1.1. Use when an inductive load has to be shown safe over a whole range rather than at one convenient point: refuse a range whose maximum nobody specified, compute the energy stored at the limitation current and the turn-off transient that inductance drives, weigh both against what the clamp path can absorb and stand off, and audit whether the demonstr...

Assess how a protected load behaves when the switch feeding it fails into a partly conducting, dissipative state. Use when an ECSS-E-ST-20-20C clause 5.3.3.1.1 failure analysis has to state the load response to a degraded feed: solve the series operating point for a constant-power, constant-current or resistive load against the failed switch resistance, categorize the outcome as degraded operation, an undervoltage inhibit or a feed that cannot be sustained at all, test the constant-power poin...

Analyze whether a load carrying its own undervoltage protection drives its supplying limiter into a repetitive overload cycle. Use when clause 5.3.5.1.1 of ECSS-E-ST-20-20C is studied: take the branch limit value and trip-off delay, the load inrush and the voltage the branch holds in limitation, decide whether the load-side protection trips and then releases, and accumulate the limiter timer across windows under its declared retention to find whether the branch ever latches off, on which cycl...

Assess whether an upset in a limiter's retrigger or status memory cells can cost the load its power, under ECSS-E-ST-20-20C clause 5.2.18.2.1. Use when a design has to show that a flipped bit stays inside the housekeeping: group each cell by what its flip actually does to the output, refuse a coverage figure claimed for a mechanism that only detects, compute the residual upset rate every load-losing cell still carries after mitigation, project it across the mission duration, and name the cell...

Determine the shortest spacing a channel allows between two consecutive external turn on commands, per clause 5.4.1.4.1 of ECSS-E-ST-20-20C. Use when a command sequence, a retry policy or an autonomous reconfiguration has to be graded before it reaches the platform timeline. Take the governing interval as the longest of the declared minimum, the thermal recovery and the inrush settling time, say so when the declared figure is not the one that governs, grade every consecutive pair for its shor...

Define which load consumptions a power budget may carry as negligible. Use when an ECSS-E-ST-20-20C clause 5.2.13.2.1 budget needs the integrator's negligibility rule written as numbers and shown to hold: apply the tighter of the declared absolute watt figure and the declared share of the reference power, screen every consumer against it, sum what the rule excuses and compare that total against the aggregate cap, and confirm one excused consumer cannot on its own eat the budget uncertainty. R...

Assess the leakage current and residual output voltage a limiter presents while it is commanded off, per clause 5.4.1.3.1 of ECSS-E-ST-20-20C. Use when an off-state data set has to be graded before a switched channel is accepted, or when a load is suspected of never fully de-energising. Cross-check the two declared limits against each other through the off-state load resistance, derive the governing leakage ceiling, grade every temperature corner against both limits, name the worst corner on ...

Assess how a distribution unit behaves when onboard software answers a dissipatively failed limiter switch by reducing the load or commanding that switch off, under clause 5.2.14.2.1 of ECSS-E-ST-20-20C. Use when the survival argument for the surrounding parts rests on software rather than on hardware removing the fault. Raise each part through the detection and reaction latency on a first order thermal response, test the temperature reached against its derated rating, test what the action le...