Deep Space Program Science Experiment (DSPSE), also known as Clementine, is a collection of science experiments conducted in near-earth with the goal of demonstrating Strategic Defense Initiative Office (SDIO) developed technologies. The 785 lb (fully fueled) spacecraft will be launched into low Earth orbit in February 1994 together with a Star 37 solid kick motor and interstage. After orbit circulation using Clementine's 110 lb Delta-V thruster, the Star 37 will execute a trans-lunar injection burn that will send the spacecraft toward lunar obit. The 110-lb will then be used in a sequence of burns to insert Clementine into a trimmed, polar orbit around the moon. After a two month moon mapping mission, Clementine will execute burns to leave lunar orbit, sling-shot around Earth, and flyby the moon on a 9.4 million km journey toward the asteroid Geographos. After about three months in transit, Clementine will attempt a flyby with a closest point of approach of 100 km from the asteroid on August 31, 1994. During its approach to Geographos, Clementine will be tracked by the Deep Space Network (DSN) and receive guidance updates. The last update and correction burn will occur about one day out of the flyby. Multiple experiments will be performed at key events during the mission that utilize Clementine's SDIO-derived resources, including its Star Trackers, UV/Vis camera, infrared sensors (NWIR and LWIR), and high resolution laser radar (HIRes/LIDAR). In addition to the evaluation of SDIO algorithms and sensors, high resolution imagery will be obtained while the spacecraft is in Earth orbit, lunar obit and during the Geographos flyby. This paper describes the results of a study on the precision guidance, navigation, and intercept strategy for the flyby mission.


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    Title :

    Geographos asteroid flyby and autonomous navigation study


    Contributors:
    L. C. Ng (author) / D. J. Pines (author) / B. J. Patz (author) / D. C. Perron (author)

    Publication date :

    1993


    Size :

    17 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English







    Targeting an Asteroid: The DSPSE Encounter With Asteroid 1620 Geographos (AAS 93-262)

    Yeomans, D. K. / American Astronautical Society / United States; National Aeronautics and Space Administration et al. | British Library Conference Proceedings | 1993


    The Clementine Mission to Geographos, A Near-Earth Asteroid

    Duxbury, T. / Acton, C. / Buratti, B. et al. | NTRS | 1994