Onboard Computers

5. Match:memorize

9. The primary goal of an EFM is to verify the electrical interfaces between different satellite units

5. Which of the following is a primary function of onboard software ?

6. On the Telecommand (TC) side, the OBSW is involved in:

Match: Memorize

8. Which UML diagram illustrates the states of system components and the transitions between them?

7. During system initialization, the OBSW kernel parses the:

7. Spare CPU capacity in the OBSW scheduling is typically reserved as contingency for

7. FDIR functionality is implemented:

5. Equipment handlers abstract the specific details of hardware interfaces from the rest of the OBSW.

3. What is the primary purpose of debug and service interfaces on the OBC?

8. What is the primary output of the OBSW Functional Analysis?

6. On the Telemetry (TM) side, the OBSW is involved in

4. Processors are typically found in other S/C instruments such as navigation receivers or star trackers.

7. The primary driver for onboard task scheduling is usually to achieve the appropriate:

5. How does the OBSW application layer typically interact with equipment?

8. Purely procedure-oriented design methods are LEAST appropriate for OBSW coding in:

2. How is the CAN-Bus physically implemented?

7. OBSW internal variables reported via the SIF can include:

6. For each predefined PUS service, the OBSW needs a:

3. How are reconfiguration units typically implemented?

7. In case of detected problems passed up to the main FDIR module, failure isolation and recovery should NOT:

7. FDIR functionality only focuses on hardware failures, not software anomalies.

1. Magnetic core memory is volatile, meaning it loses its data when power is removed

3. What is the primary purpose of the Command Pulse Decoding Unit (CPDU)?

2. What feature of SpaceWire allows for extremely high data rates?

1. The HAL/S programming language included features for real-time processing control and was used for the Space Shuttle

6. High Priority Commands (HPC) of highest class 1 are used for:

OBC cores depend: .t. required authenticn functions, perfor. require.s, memory equip., high prio line (HPC), firmware

2. What is SpaceWire described as?

What does SoC mean?

4. Technology Readiness Level (TRL) 1, according to the NASA classification, requires the most maturity

4. The OBC must be electromagnetically tight only against external electromagnetic effects, induced from the environment

How is the selection between the nominal and redundant power supply unit typically managed?

6. The OBSW's interaction with ground control primarily involves:

3. What is the primary purpose of reconfiguration units within the OBC?

What is a key advantage of using data buses over point-to-point conec. for connec multiple pieces of equip. to the OBC?

1.MIL-STD-1750 def. a 16-b micropr. architctr. What was the prim. applic. area for processors compliant with this stand?

4. Flash memory is good for usage in space

8. The next step after defining the OBSW Function Tree is:

1. RISC processors require more low-level instructionsthan CISC processors to perform a certain operation

Match: Memorize

5. The boot loader is a part of the application layer.

5. Which layer of the OBSW typically contains drivers for I/O channels like UART?

9. What is a significant effort required for an STB configuration where the OBC's I/O interfaces are directly tested?

8. UML is primarily used for:

9. The main branches of the classic V-model for development and verification are:

3. What is the direction of telecommands with respect to the spacecraft and the transponder interface?

1. System-on-Chip (SoC) designs integrate multipleprocessing cores on a single chip

1. What architecture was selected by ESA as a baseline?

3. What is an example of a standard serial interface often used as a debug interface?

4. What is an important aspect related to longer lines between chips on a PCB within an OBC?

5. What is a key role of the Operating System (OS) and drivers layer in OBSW?

Match: Memorise

6. X-band and Ka-band are preferred for science data due to higher bandwidth capabilities.

9. What is a key aspect tested on a Hybrid System Testbed (STB) for the first time?

The connectors use short, flexible wiring to prevent solder stress from launcher-induced vibrations.

1. The transition toward SoC. des. means processor designs are becoming less integ. and spreading across multiple chips

1. What programming language was used for the Onboard Software (OBSW) of the Gemini missions?

7. The top-level FDIR module acts as the overall health monitor and recovery action controller.

8. For satellite OBSW, a critical consideration in design is:

3. How are High Priority Commands identified by the CCSDS processor for routing to the CPDU?

2. What does MIL-STD-1553B primarily define?

8. Which of the following is NOT a key aspect of detailed OBSW requirements specification?

4. What can high clock frequencies in OBCs and modern bus interfaces lead to?

6. After identification, HPCs are typically routed to the:

SIF stub module in the OBSW can serve for health chec until shortly bef. launch via S/C umbilical conn. at the launch s.

5. Drivers in the OBSW directly implement high-level mission algorithms

9. The V-model dictates that software testing should only occur after the entire software implementation is complete

2. What type of memory is used for the boot loader and a reference image of the onboard software?

8. During which phase of S/C development is a detailed definition of all onboard functions worked out?

1. What voting scheme was applied when all four computers were running in the Shuttle Data Processing System (DPS)?

What type of encoding does CAN-Bus utilise to enhance message compactness and robustness?

2. Which new memory technology combine the benefits of integrated circuits with the persistence of magnetic core memory?

5. What is the main purpose of equipment handlers within the OBSW?

9. Housekeeping telemetry is only generated when a specific request is received from the ground

9: Match:Memorize

3. What is the primary use of a Joint Test Action Group (JTAG) interface?

2. How many Remote Terminals (RT) can a MIL bus have, in addition to a Bus Controller (BC)

6. All telecommands received from the ground are treated with the same priority

9. To verify detailed spacecraft requirements, what must be available according to the V-model?

This is true: memorize

9. What is a primary purpose of a Functional Verification Bench (FVB)?

8. Software implementation and coding should be independent of the software design.

1. What characteristic of the RCA 1802 microprocessor made it suitable for the Galileo mission?

4. Radiation hardened chips are required starting at the OBC breadboard models.

9. What kind of tests are "Controller in the Loop" tests typically performed on?

3. What is the primary role of the transponder interface in relation to the OBC?

6. The Packet Utilization Standard (PUS) primarily defines:

2. For what was MIL-STD-1553B initially designed?

7. Through the SIF and dedicated analysis tools, it is possible to check: