Improve Operations: Metrics to Results

Faris, Grant; Bryant, Larry

doi:10.2514/6.2012-1255930

Cited by 5 publications

(5 citation statements)

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“…There are a lot of moving pieces (both products and people). On reviewing in-flight operation errors, the majority of issues initiate in the planning process 1 . The more time and effort that projects can spend in the development effort and testing of the Activity Planning Scenario pre-flight is highly recommended.…”

Section: Figure 1 Operation Scenario Roadmapmentioning

confidence: 99%

“…After the general discussion, we will then look in-depth at a specific example, the Emirates Mars Mission (EMM). Launching in 2020, EMM will explore the atmospheric 1 Professional Research Assistant, Mission Operations & Data Systems, 1234 Innovation Dr. Boulder, CO 80303. C dynamics of Mars on a global, sub-seasonal scale, providing the measurements necessary to understand atmospheric properties.…”

Section: Introductionmentioning

confidence: 99%

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The Role of Operation Scenarios in Ground Segment Development

Kelley

Ryan

Pilinski

et al. 2018

2018 SpaceOps Conference

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Operation scenarios are a key part in the development of a ground segment to prepare for mission operations. They describe the work/data flows, tools, people, timelines, and facilities needed to perform a specific operations objective and include both ground segment and flight segment tasks. These scenarios can then be used as the starting point for the actual operational procedures and processes. Scenarios are also used to ensure requirements are complete and used in the Verification & Validation program to help define testing and maximize Test-Like-You-Fly procedures. Because of this, operation scenarios are needed early in the mission development cycle as they provide the baseline to work towards in integration and test. For a given mission, there are five basic scenarios: Activity Planning, Uplink Build, Routine Contact, Downlink and Science Data Processing. Nomenclature CubeSat = A U-class spacecraft. FlatSat = The collective hardware, firmware and software required to provide a simulated Observatory environment for the purpose of flight software development, integration & test procedure development, and operational scenario testing and training. Observatory = The integrated spacecraft and science instruments including all on-board consumables.

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Section: Figure 1 Operation Scenario Roadmapmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Role of Operation Scenarios in Ground Segment Development

Kelley

Ryan

Pilinski

et al. 2018

2018 SpaceOps Conference

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“…The probabilities associated with the CPTs were reverse engineered based on the error rates that have been observed at JPL [11,13].…”

Section: Process Compliancementioning

confidence: 99%

Managing the Risk of Command File Errors

Meshkat

Bryant²

2013

51st AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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Command File Error (CFE), as defined by the Jet Propulsion Laboratory's (JPL) Mission Operations Assurance (MOA) is, regardless of the consequence on the spacecraft, either: an error in a command file sent to the spacecraft, an error in the process for developing and delivering a command file to the spacecraft, or the omission of a command file that should have been sent to the spacecraft. The risk consequence of a CFE can be mission ending and thus a concern to space exploration projects during their mission operations. A CFE during space mission operations is often the symptom of some kind of imbalance or inadequacy within the system that comprises the hardware & software used for command generation and the human experts involved in this endeavour. As we move into an era of enhanced collaboration with other NASA centers and commercial partners, these systems become more and more complex and hence it is all the more important to formally model and analyze CFEs in order to manage the risk of CFEs. Here we will provide a summary of the ongoing efforts at JPL in this area and also explain some more recent developments in the area of developing quantitative models for the purpose of managing CFE's.

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“…Hence the applicability of Bayesian Belief Networks (BBNs) for the systems analysis and management of CFEs. An overarching BBN model representing the body of knowledge associated with the occurrence of CFE's was initially developed based on interviews with key experts, and assessment of existing data and knowledge bases [4,5,10]. Since it is based on knowledge and data from multiple missions, we call this the multi-mission model.…”

Section: Systems Analysis Using Bayesian Belief Networkmentioning

confidence: 99%

Modeling to Improve the Risk Reduction Process for Command File Errors

Meshkat

Bryant

Waggoner

2013

AIAA SPACE 2013 Conference and Exposition

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The Jet Propulsion Laboratory has learned that even innocuous errors in the spacecraft command process can have significantly detrimental effects on a space mission. Consequently, such Command File Errors (CFE), regardless of their effect on the spacecraft, are treated as significant events for which a root cause is identified and corrected. A CFE during space mission operations is often the symptom of imbalance or inadequacy within the system that encompasses the hardware and software used for command generation as well as the human experts and processes involved in this endeavor. As we move into an era of increased collaboration with other NASA centers and commercial partners, these systems become more and more complex. Consequently, the ability to thoroughly model and analyze CFEs formally in order to reduce the risk they pose is increasingly important. In this paper, we summarize the results of applying modeling techniques previously developed to the DAWN flight project. The original models were built with the input of subject matter experts from several flight projects. We have now customized these models to address specific questions for the DAWN flight project and formulating use cases to address their unique mission needs. The goal of this effort is to enhance the project's ability to meet commanding reliability requirements for operations and to assist them in managing their Command File Errors.

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Improve Operations: Metrics to Results

Cited by 5 publications

References 0 publications

The Role of Operation Scenarios in Ground Segment Development

The Role of Operation Scenarios in Ground Segment Development

Managing the Risk of Command File Errors

Modeling to Improve the Risk Reduction Process for Command File Errors

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