GlastCam and LROCam are closely-related tools developed at NASA Goddard Space Flight Center for real-time visualization of spacecraft telemetry, developed for the Gamma-Ray Large Area Space Telescope (GLAST) and Lunar Reconnaissance Orbiter (LRO) missions, respectively. Derived from a common simulation tool, they use related but different architectures to ingest real-time spacecraft telemetry and ground predicted ephemerides, and to compute and display features of special interest to each mission in its operational environment. We describe the architectures of GlastCam and LROCam, the customizations required to fit into the mission operations environment, and the features that were found to be especially useful in early operations for their respective missions. Both tools have a primary window depicting a three-dimensional Cam view of the spacecraft that may be freely manipulated by the user. The scene is augmented with fields of view, pointing constraints, and other features which enhance situational awareness. Each tool also has another 'Map' window showing the spacecraft's groundtrack projected onto a map of the Earth or Moon, along with useful features such as the Sun, eclipse regions, and TDRS satellite locations. Additional windows support specialized checkout tasks. One such window shows the star tracker fields of view, with tracking window locations and the mission star catalog. This view was instrumental for GLAST in quickly resolving a star tracker mounting polarity issue; visualization made the 180-deg mismatch immediately obvious. Full access to GlastCam's source code also made possible a rapid coarse star tracker mounting calibration with some on the fly code adjustments; adding a fine grid to measure alignment offsets, and introducing a calibration quaternion which could be adjusted within GlastCam without perturbing the flight parameters. This calibration, from concept to completion, took less than half an hour. Both GlastCam and LROCam were developed in the C language, with non-proprietary support libraries, for ease of customization and portability. This no-blackboxes aspect enables engineers to adapt quickly to unforeseen circumstances in the intense operations environment. GlastCam and LROCam were installed on multiple workstations in the operations support rooms, allowing independent use by multiple subsystems, systems engineers and managers, with negligible draw on telemetry system resources.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Real-Time Visualization of Spacecraft Telemetry for the GLAST and LRO Missions


    Beteiligte:
    E. T. Stoneking (Autor:in) / N. Shah (Autor:in) / D. J. Chai (Autor:in)

    Erscheinungsdatum :

    2010


    Format / Umfang :

    11 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Real-Time Visualization of Spacecraft Telemetry for the GLAST and LRO Missions

    Stoneking, Eric T. / Shah, Neerav / Chai, Dean J. | NTRS | 2010


    Real-Time Visualization of Spacecraft Telemetry for the GLAST and LRO Missions

    Stoneking, Eric / Shah, Neerav / Chai, Dean | AIAA | 2010


    Real-Time Visualization of Spacecraft Telemetry for the GLAST and LRO Missions

    Stoneking, E. / Shah, N. / Chai, D. et al. | British Library Conference Proceedings | 2010


    GlastCam: A Telemetry-Driven Spacecraft Visualization Tool

    Stoneking, Eric T. / Tsai, Dean | NTRS | 2009


    Real-Time Telemetry Simulator of the IUS Spacecraft

    M. E. Drews / D. A. Forman / D. M. Baker et al. | NTIS | 1998