The publications outlined below describe some of the solutions that Ingenicomm's engineers have developed to address our customers' unique mission requirements. To request a copy of a particular publication, please email info@ingenicomm.net.
47th International Telemetering Conference
The National Oceanic and Atmospheric Administration (NOAA) Jason Ground System (NJGS) is a consolidated next-generation ground system that will support the simultaneous operation of the OSTM/Jason-2 and Jason-3 ocean surface topography missions. The NJGS will consist of several independent subsystems for spacecraft command and control, telemetry processing, and data archiving and distribution.
The existing NOAA Jason-2 Ground System (J2GS) was designed around the concept of subsystem “strings”, in which two complete sets of subsystems acted in primary and standby roles. For the NJGS, this concept is replaced with subsystem-level redundancy, in which two or more instances of each subsystem independently provide redundant capabilities.
This paper discusses the design elements involved in the provision of a ground system architecture providing redundancy at the subsystem level. The paper focuses on the interaction between primary and standby subsystems and the mechanism through which failover capabilities are provided across the ground system.
The existing NOAA Jason-2 Ground System (J2GS) was designed around the concept of subsystem “strings”, in which two complete sets of subsystems acted in primary and standby roles. For the NJGS, this concept is replaced with subsystem-level redundancy, in which two or more instances of each subsystem independently provide redundant capabilities.
This paper discusses the design elements involved in the provision of a ground system architecture providing redundancy at the subsystem level. The paper focuses on the interaction between primary and standby subsystems and the mechanism through which failover capabilities are provided across the ground system.
Link Validation and Performance Measurement Within the NASA Space Network
47th International Telemetering Conference
The National Aeronautics and Space Administration (NASA) Space Network (SN) consists of a Space Segment, composed of the Tracking and Data Relay Satellite (TDRS) fleet, and a Ground Segment that includes the White Sands Ground Terminal (WSGT), Second TDRS Ground Terminal (STGT) and the Guam Remote Ground Terminal (GRGT). Collectively, the SN Ground Segment is commonly referred to as the White Sands Complex (WSC). Traditional methods of latency and performance measurement across the component links of network have relied on the use of simplified test patterns and basic data formats that are often specific to the instruments providing the measurements. These tests do not often correlate to the operational data normally transferred through the network.
This paper discusses an alternative approach to performance measurement within the Space Network. By embedding and extracting performance metrics directly within simulated data sets that closely resemble operational traffic, performance measurement can be combined with link verification and validation to provide a single, comprehensive set of test and measurement activities.
This paper discusses an alternative approach to performance measurement within the Space Network. By embedding and extracting performance metrics directly within simulated data sets that closely resemble operational traffic, performance measurement can be combined with link verification and validation to provide a single, comprehensive set of test and measurement activities.
Ensuring Data Integrity during Subsystem Failure Recovery within the NOAA Jason Ground System
18th Conference on Satellite Meteorology, Oceanography and Climatology
The National Oceanic and Atmospheric Administration (NOAA) Jason Ground System (NJGS) is a consolidated next-generation ground system that will support the simultaneous operation of the OSTM/Jason-2 and Jason-3 ocean surface topography missions. The NJGS will consist of several independent subsystems for spacecraft command and control, telemetry processing, and data archiving and distribution.
To provide high availability and multi-level resilience against equipment failures, the NJGS will employ a subsystem-level redundancy scheme, in which two or more independent instances of each subsystem provide fully redundant functionality, for the various subsystems within the NJGS. The use of this scheme requires the implementation of several safeguards to ensure that a subsystem failure and the resulting system recovery operations do not result in any loss of operational data.
This paper discusses the key elements of the subsystem-level redundancy scheme and the mechanism through which the NJGS recovers from a subsystem failure. The paper focuses on the potential failure scenarios present in the recovery process, and the technical and procedural safeguards necessary to ensure data integrity across subsystem instances.
To provide high availability and multi-level resilience against equipment failures, the NJGS will employ a subsystem-level redundancy scheme, in which two or more independent instances of each subsystem provide fully redundant functionality, for the various subsystems within the NJGS. The use of this scheme requires the implementation of several safeguards to ensure that a subsystem failure and the resulting system recovery operations do not result in any loss of operational data.
This paper discusses the key elements of the subsystem-level redundancy scheme and the mechanism through which the NJGS recovers from a subsystem failure. The paper focuses on the potential failure scenarios present in the recovery process, and the technical and procedural safeguards necessary to ensure data integrity across subsystem instances.
Implementing a Multi-Site Distributed Earth Terminal for the NOAA Jason Ground System
18th Conference on Satellite Meteorology, Oceanography and Climatology
The National Oceanic and Atmospheric Administration (NOAA) Jason Ground System (NJGS) is a consolidated next-generation ground system that will support the simultaneous operation of the OSTM/Jason-2 and Jason-3 ocean surface topography missions. The NJGS will consist of several independent subsystems for spacecraft command and control, telemetry processing, and data archiving and distribution.
To provide the additional resources necessary for supporting both missions on a single ground system, NOAA is integrating the communications infrastructure located at its remote station in Barrow, AK, with the communications infrastructure of the primary NOAA Command and Data Acquisition Station (CDAS) at Fairbanks, AK. Together, the two sites will provide a consolidated interface, allowing the NJGS to use the combined resources of both sites as a single integrated earth terminal.
This paper discusses the delivery of mission data between the two sites and through a consolidated interface to the NJGS. The paper focuses on the telemetry-over-IP (TMoIP) gateway infrastructure that provides transport capabilities across the site boundaries, as well as the mechanism through which the sites present a common interface to the other components of the ground system.
To provide the additional resources necessary for supporting both missions on a single ground system, NOAA is integrating the communications infrastructure located at its remote station in Barrow, AK, with the communications infrastructure of the primary NOAA Command and Data Acquisition Station (CDAS) at Fairbanks, AK. Together, the two sites will provide a consolidated interface, allowing the NJGS to use the combined resources of both sites as a single integrated earth terminal.
This paper discusses the delivery of mission data between the two sites and through a consolidated interface to the NJGS. The paper focuses on the telemetry-over-IP (TMoIP) gateway infrastructure that provides transport capabilities across the site boundaries, as well as the mechanism through which the sites present a common interface to the other components of the ground system.
Implementing Transparent Subsystem Failure Recovery within the NOAA Jason Ground System
16th Ground System Architectures Workshop
The National Oceanic and Atmospheric Administration (NOAA) Jason Ground System (NJGS) is a consolidated next-generation ground system that will support the simultaneous operation of the OSTM/Jason-2 and Jason-3 ocean surface topography missions. The NJGS will consist of several independent subsystems for spacecraft command and control, telemetry processing, and data archiving and distribution, and will provide the other Jason-3 mission partners — the National Aeronautics and Space Administration (NASA), the Centre National d'Etudes Spaciales (CNES), and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) — with access to mission operational data and science products.
To assure high availability and multi-level resilience against equipment failures, the NJGS will employ a subsystem redundancy scheme in which two or more independent instances of each subsystem provide fully redundant functionality. The redundancy mechanism selected for the NJGS is an enhancement of the one used in NOAA’s existing Jason-2 Ground System (J2GS); the two approaches differ in that the J2GS provides redundancy among parallel sets of subsystems, whereas the NJGS will allow individual subsystems to be independently replaced.
The J2GS subsystem redundancy implementation imposed a number of limitations on the mission partners. Chief among these was the non-transparency of the subsystem replacement process; following any subsystem failure, all mission partners with access to the failed subsystem would be required to reconfigure their communications interfaces to access its replacement. The need for this explicit change in configuration imposed significant overhead on subsystem failure recovery, since any replacement required a coordinated international effort to complete.
The NJGS subsystem redundancy mechanism removes this constraint on partner interoperability by implementing subsystem replacement in a transparent manner. Multiple instances of externally-accessible NJGS subsystems provide common interfaces to the mission partners, and the integrity of these interfaces is maintained during the change-over from a failed subsystem to its standby counterpart. This method allows subsystem replacement to be completed without requiring any configuration changes on the part of the external mission partners.
This presentation discusses the key elements of the subsystem-level redundancy scheme and the mechanism through which the NJGS recovers from a subsystem failure. The presentation focuses on the implementation of common external interfaces for NJGS subsystems accessed by external partners, and the method by which these interfaces are preserved during subsystem failure recovery.
To assure high availability and multi-level resilience against equipment failures, the NJGS will employ a subsystem redundancy scheme in which two or more independent instances of each subsystem provide fully redundant functionality. The redundancy mechanism selected for the NJGS is an enhancement of the one used in NOAA’s existing Jason-2 Ground System (J2GS); the two approaches differ in that the J2GS provides redundancy among parallel sets of subsystems, whereas the NJGS will allow individual subsystems to be independently replaced.
The J2GS subsystem redundancy implementation imposed a number of limitations on the mission partners. Chief among these was the non-transparency of the subsystem replacement process; following any subsystem failure, all mission partners with access to the failed subsystem would be required to reconfigure their communications interfaces to access its replacement. The need for this explicit change in configuration imposed significant overhead on subsystem failure recovery, since any replacement required a coordinated international effort to complete.
The NJGS subsystem redundancy mechanism removes this constraint on partner interoperability by implementing subsystem replacement in a transparent manner. Multiple instances of externally-accessible NJGS subsystems provide common interfaces to the mission partners, and the integrity of these interfaces is maintained during the change-over from a failed subsystem to its standby counterpart. This method allows subsystem replacement to be completed without requiring any configuration changes on the part of the external mission partners.
This presentation discusses the key elements of the subsystem-level redundancy scheme and the mechanism through which the NJGS recovers from a subsystem failure. The presentation focuses on the implementation of common external interfaces for NJGS subsystems accessed by external partners, and the method by which these interfaces are preserved during subsystem failure recovery.