This page contains a list of verification activities and links their evidence.

Verified Activities

Activities that were verified during Phases A, B, C, or D

V-COM-0450

Review the communications design to confirm that there are interface connections to connect to the star ground of the power system.

Verified: Phase B

Compliance Notes: All through holes are not plated. Ground plane is insulated from the structure through the black anodized and non-conductive epoxy.

Evidence: Sheet 6.

V-COM-0460

Verify that the communications hardware is attached to the spacecraft structure.

Not Verified: Phase D, Integration

Compliance Notes: Board mounts through standoffs and imperial bolts.

Evidence: Sheet 7.

V-COM-0470

Review documentation of qualification and vibration tests performed on the selected hardware provided by the manufacturer.

Verified: Phase C

Compliance Notes: AEC - Q200 components are subjected to vibration test of 5 g's for 20 min., 12 cycles each of 3 orientations. Conformal offers a passive way for vibration control for for components. All bolts will be torqued to specification and loctite will applied on the thread. The coaxial cable will be torqued to 8 inch-pound.

Evidence: The transceiver and the board will be rigidly bolted together using spacers, nuts and bolts. The buck converter is small enough that it doesn't require staking. Nasa workmanship standard will be followed.

V-COM-0480

Perform structural tests with the communications system hardware to verify positive margins of safety under expected mechanical loads.

Not Verified: Phase D, Functional

Evidence: A link to MECH vibration test will be added

V-COM-0490

Review the datasheets of all communications components and verify that they are able to power on and function at temperatures from -10C to +45C.

Verified: Phase B

Compliance Notes: Verified from the datasheets, meets AEC-Q200.

Evidence: AEC-Q200 components are tested to operate within the specified grande. The buck component also functions within the required range. See Electrical BOM & datasheet.

V-COM-0510

Verify that the communications design includes implementation of a U-loop feature for radio and antenna testing.

Verified: Phase B

Evidence: A Right Angle MCX to SMA connector will be used as a U-loop. See block diagram & u-loop.

V-COM-0511

Inspect the final spacecraft assembly to verify that the U-loop is integrated into the system and is accessible for antenna and radio testing.

Not Verified: Phase D, Integration

V-COM-0520

Test if the communications system continues nominal function after simulating a CDH reboot.

Not Verified: Phase D, FLATSAT

Compliance Notes: Comms is able to recover (i.e. continue/restart transmission) after a simulated a simulated CDH software reboot within 5 minutes or less.

V-COM-0521

Test if the communications system continues nominal function after simulating a PCU reboot.

Not Verified: Phase D, FLATSAT

Compliance Notes: Comms is able to recover (i.e. continue/restart transmission) after a simulated power cut within 5 minutes or less.

V-COM-0530

Perform inspection of the comms subsystem after spacecraft level vibration tests and confirm that no components have been liberated, damaged, or come loose.

Not Verified: Phase D, Post Vibration

Compliance Notes: Verified from the datasheets, meets AEC-Q200. AEC-Q200 components are tested to operate within the specified range. The buck component also functions within the required range. See Electrical BOM & datasheet.

Evidence:

V-COM-0540

Review the bill of materials for the communications system and verify that it does not use any hazardous and prohibited materials.

Verified: Phase C

Evidence: See Electrical BOM & datasheet.

V-COM-0541

Review the purchasing conditions for all procured components and verify that they do not violate ITAR restrictions.

Verified: Phase B

Evidence: No ITAR restrictions for the purchase of the transceiver. See Electrical BOM & datasheet.

V-COM-0550

Review the qualification documentation of the component manufacturer to verify that components can withstand pressures of 0 to 104.8 kPa and a de/re-pressurization rate of 1.0 kPa/sec.

Verified: Phase C

Evidence: Review Data Sheets for individual components. See Electrical BOM & datasheet.

V-COM-0551

Test the communications hardware in a TVAC chamber to verify it can withstand pressures of 0 to 104.8 kPa and a de/re-pressurization rate of 1.0 kPa/sec.

Not Verified: Phase D, TVAC

V-COM-0560

Test that the communications system hardware can withstand pressures of 0 to 104.8 kPa and a de/re-pressurization rate of 1.0 kPa/sec.

Verified: by inspection, C

Evidence:

V-COM-0570

Analyze the design and verify that the communications system does not have any detachable parts during the entire mission lifetime.

Verified: Phase C

Compliance Notes: Verified from the datasheets, meets AEC-Q200.

Evidence: AEC-Q200 components are tested to operate within the specified range. The buck component also functions within the required range. See Electrical BOM & datasheet.

V-COM-0580

Test that the communications subsystem remains powered off during the first 30 minutes after a simulated launch and the inhibit timer.

Not Verified: Phase D, FLATSAT

V-COM-0590

Test that the antenna will not deploy and the deployment mechanism remains powered off during the first 30 minutes after a simulated launch with the inhibit timer.

Not Verified: Phase D, FLATSAT

V-COM-0600

Review qualification documentation and verify that the communications module is capable of withstanding spacecraft loads with an on-orbit acceleration of 2.0 m/s^2, Airlock acceleration of 1.5m/s^2 and JEMRMS acceleration of 0.69m/s^2.

Verified: Phase C

Compliance Notes: AEC - Q200 components are subjected to vibration test of 5 g's for 20 min., 12 cycles each of 3 orientations. Conformal offers a passive way for vibration control for for components. All bolts will be torqued to specification and loctite will applied on the thread. The coaxial cable will be torqued to 8 inch-pound.

Evidence: The transceiver and the board will be rigidly bolted together using spacers, nuts and bolts. The buck converter is small enough that it doesn't require staking. Nasa workmanship standard will be followed.

V-COM-0610

Review the datasheets of communications components and verify that they are capable of functioning while withstanding relative humidity environment between 25% to 75% relative humidity.

Verified: Phase C

Compliance Notes: Verified the datasheet of individual components on the communication board.

Evidence: All components can operate within the required RH.

V-COM-0620

Verify that the communications system is design to control all hazards present according to the Catastophic Hazard requirements.

Verified: Phase C

Compliance Notes: No hazardous components on comms board.

Evidence: Verified on NASA database and materials listed on datasheets.