Proven and Robust Ground Support Systems - GSFC Success and Lessons Learned

Pfarr, B.; Donohue, J.T.; Lui, Ben; Greer, Gregory; Green, T.

doi:10.1109/aero.2008.4526664

Cited by 7 publications

(4 citation statements)

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“…5. 1. ITOS-the Integrated Test and Operations System, a NASA/GSFC-developed system already in use for the FAST and RHESSI missions, is used for THEMIS real-time telemetry monitoring and command and control as well as limit-level-based health and safety monitoring (Pfarr et al 2008). In-house development at UCB/SSL extends ITOS and integrates it with other components of the ground system allowing pass supports, including recovery of stored science and engineering telemetry data to be conducted in a hands-off and lights-out manner with a high degree of reliability.…”

Section: Software Toolsmentioning

confidence: 99%

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THEMIS Operations

et al. 2008

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THEMIS-a five-spacecraft constellation to study magnetospheric events leading to auroral outbursts-launched on February 17, 2007. All aspects of operations are conducted at the Mission Operations Center at the University of California at Berkeley. Activities of the multi-mission operations team include mission and science operations, flight dynamics and ground station operations. Communications with the constellation are primarily established via the Berkeley Ground Station, while NASA's Ground Network provides secondary pass coverage. In addition, NASA's Space Network supports maneuver operations near perigee. Following a successful launch campaign, the operations team performed on-orbit probe bus and instrument check-out and commissioning tasks, and placed the constellation initially into a coast phase orbit configuration to control orbit dispersion and conduct initial science operations during the summer of 2007. Mission orbit placement was completed in the fall of 2007, in time for the first winter observing season in the Earth's magnetospheric tail. Over the course of the first 18 months of on-orbit constellation operations, procedures for instrument configuration, science data acquisition and navigation were refined, and software systems were enhanced. Overall, the implemented ground systems at the Mission Operations Center proved to be very successful and completely adequate to support reliable and efficient constellation operations. A high degree of systems automation is employed to support lights-out operations during off-hours.

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Section: Software Toolsmentioning

confidence: 99%

“…2. The spacecraft command and control system for THEMIS is the Integrated Test and Operations System (ITOS) (Pfarr et al 2008), which is also used for FAST and RHESSI mission operations. Other tools within Mission Operations support functions such as pass scheduling, mission planning, data trending and anomaly resolution.…”

Section: Ground System Elementsmentioning

confidence: 99%

THEMIS Operations

et al. 2008

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“…ITOS was used to perform all monitoring and control of the Morpheus vehicle while in flight. 17 ITOS was developed by Goddard Space Flight Center (GSFC) to communicate with space vehicles using Core Flight Software (which is the software used in Morpheus). Since the ALHAT sensors data was integrated into the vehicle telemetry (See Section III.C), the Morpheus data link contained ALHAT telemetry.…”

Section: Iiid Operations Interfacesmentioning

confidence: 99%

Interfacing and Verifying ALHAT Safe Precision Landing Systems with the Morpheus Vehicle

Carson

Hirsh

Busa

et al. 2015

AIAA Guidance, Navigation, and Control Conference

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The NASA Autonomous precision Landing and Hazard Avoidance Technology (ALHAT) project developed a suite of prototype sensors to enable autonomous and safe precision landing of robotic or crewed vehicles under any terrain lighting conditions. Development of the ALHAT sensor suite was a cross-NASA effort, culminating in integration and testing onboard a variety of terrestrial vehicles toward infusion into future spaceflight applications. Terrestrial tests were conducted on specialized test gantries, moving trucks, helicopter flights, and a flight test onboard the NASA Morpheus free-flying, rocket-propulsive flighttest vehicle. To accomplish these tests, a tedious integration process was developed and followed, which included both command and telemetry interfacing, as well as sensor alignment and calibration verification to ensure valid test data to analyze ALHAT and Guidance, Navigation and Control (GNC) performance. This was especially true for the flight test campaign of ALHAT onboard Morpheus. For interfacing of ALHAT sensors to the Morpheus flight system, an adaptable command and telemetry architecture was developed to allow for the evolution of per-sensor Interface Control Design/Documents (ICDs). Additionally, individual-sensor and on-vehicle verification testing was developed to ensure functional operation of the ALHAT sensors onboard the vehicle, as well as precision-measurement validity for each ALHAT sensor when integrated within the Morpheus GNC system. This paper provides some insight into the interface development and the integrated-systems verification that were a part of the build-up toward success of the ALHAT and Morpheus flight test campaigns in 2014. These campaigns provided valuable performance data that is refining the path toward spaceflight infusion of the ALHAT sensor suite.

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“…(1) Spacecraft command and control systems Seven of the eight spacecraft supported by the MOC, namely FAST, RHESSI, and the five-spacecraft THEMIS constellation use the Integrated Test and Operations System (ITOS) for spacecraft command and control [19], [20].…”

Section: Real-time Schedule Distributionmentioning

confidence: 99%

Automated multi-mission scheduling and control center operations at UC Berkeley

Bester

2009

2009 IEEE Aerospace Conference

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UC Berkeley has been operating eight spacecraft from its multi-mission control center at Space Sciences Laboratory, using the local Berkeley Ground Station as well as multiple government and commercial ground networks for space-to-ground communications. This paper describes challenges associated with developing multi-mission contact schedules in a constraint-based environment involving several ground networks with competing users, and presents a solution that provides short turn-around times and applies a high degree of systems automation. 1 2

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Proven and Robust Ground Support Systems - GSFC Success and Lessons Learned

Cited by 7 publications

References 1 publication

THEMIS Operations

THEMIS Operations

Interfacing and Verifying ALHAT Safe Precision Landing Systems with the Morpheus Vehicle

Automated multi-mission scheduling and control center operations at UC Berkeley

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