4.5.7 - Hosted Payload

4.5.7-4 Level 2 Tasks

Tasks Applicable Mission Phases Description SFWC Artifacts References
4.5.7-4-1 Ensure that Hosted Payload does not inhibit Host Vehicle's ability to transition into safemode autonomously or via command from Ground/Control Segment Phase B | Phase C | Phase D1 | Ensure Host Vehicle has the following interface capabilities with Hosted Payload: (1) override/terminate transactions, (2) terminate external emissions, (3) stabilize/stop movements, (4) reduce/eliminate power consumption. NA NA TOR-2014-02199, Guidelines for Hosted Payload Integration
4.5.7-4-2 Ensure that the Hosted Payload can only enter an operational mode upon receipt of a valid command from the Host Vehicle, whether initiated autonomously or by a Ground/Control Segment command Phase B | Phase C | Phase D1 | Ensure test planning includes all use cases for operational mode entry and exit. NA NA TOR-2014-02199, Guidelines for Hosted Payload Integration
4.5.7-4-3 Ensure Hosted Payload has at least one independent fault detection response (e.g., hardware watchdog) that protects itself and notifies the Host Vehicle Phase B | Phase C | Phase D1 | A hardware-based watchdog timer is a design that initiates a Hosted Payload fault protection response and notifies the Host Vehicle that a Hosted Payload Fault has occurred. NA NA TOR-2014-02199, Guidelines for Hosted Payload Integration
4.5.7-4-4 Ensure Host Vehicle can be protected by placing Hosted Payload into a safe condition at the end of its life by either autonomous or ground comment entry into a "safe" configuration Phase B | Phase C | Phase D1 | Ensure that any Hosted Payload sources of stored energy (pressure vessels, mechanisms, batteries, and capacitors, e.g.) are safed to prevent damage to the Host Vehicle or its payloads after the Hosted Payload end of mission. Ensure that safe conditions at EOL considers thermal and radiation environments. Hosted payloads often have shorter mission life than their Hosts. NA NA TOR-2014-02199, Guidelines for Hosted Payload Integration
4.5.7-4-5 Ensure Host Vehicle firing circuits are protected against sneak currents and line-to-ground shorts Phase B | Phase C | Phase D1 | Ensure Hosted Payload components such as step motors and pyro circuits that experience sudden current changes are isolated from all other current-carrying circuits including power, control, RF transmission lines, and monitoring circuitry. NA NA TOR-2014-02199, Guidelines for Hosted Payload Integration