Verify that an on-board telecommand chain rejects an erroneous command instead of executing it, per ECSS-E-ST-50C clause 5.4.3: recompute the check symbol rather than trusting the one that arrived, walk integrity, declared length, destination application, service support and parameter range in an order where a broken packet can never be blamed on a later field, and return the first failing check with an execution plan that is empty and a rejection report owed to the ground. Use when deciding what an on-board acceptance chain does with a malformed uplink. Trigger: ecss, e-st-50c-communications-scope, erroneous-telecommand-rejection, telecommand-acceptance-check, telecomman…
