h/kg Nihau ( Ni-H) common pressure vessel battery.Power was provided by gimbaled, single axis, GaAs/Ge solar panels which charged a 15 A The spacecraft was three-axis stabilized in lunar orbit via reaction wheels with a precision of 0.05 deg in control and 0.03 deg in knowledge. The bipropellant system had a total Delta-v capability of about 1,900 m/s with about 550 m/s required for lunar insertion and 540 m/s for lunar departure.Īttitude control was achieved with 12 small attitude control jets, two star trackers, and two inertial measurement units. The spacecraft propulsion system consisted of a monopropellant hydrazine system for attitude control and a bipropellant nitrogen tetroxide and monomethyl hydrazine system for the maneuvers in space. The sensor openings were all located together on one of the eight panels, 90 degrees from the solar panels, and protected by a single sensor cover. A 42-inch-diameter (1,100 mm) high-gain fixed dish antenna was at one end of the prism, and the 489 N thruster at the other end. The spacecraft was an octagonal prism 1.88 m high and 1.14 m across with two solar panels protruding on opposite sides parallel to the axis of the prism. The project was named Clementine after the song " Oh My Darling, Clementine" as the spacecraft would be "lost and gone forever" following its mission. The S-band transponder was used for communications, tracking, and the gravimetry experiment. There were also plans to image and determine the size, shape, rotational characteristics, surface properties, and cratering statistics of Geographos.Ĭlementine carried seven distinct experiments on board: a UV/Visible Camera, a Near Infrared Camera, a Long Wavelength Infrared Camera, a High Resolution Camera, two Star Tracker Cameras, a Laser Altimeter, and a Charged Particle Telescope. These observations were for the purposes of obtaining multi-spectral imaging of the entire lunar surface, assessing the surface mineralogy of the Moon, obtaining altimetry from 60N to 60S latitude, and obtaining gravity data for the near side. The lunar observations included imaging at various wavelengths in the visible as well as in ultraviolet and infrared, laser ranging altimetry, gravimetry, and charged particle measurements. Observation of the asteroid was not made due to a malfunction in the spacecraft. Its objective was to test sensors and spacecraft components in long-term exposure to space and to make scientific observations of both the Moon and the near-Earth asteroid 1620 Geographos. Laser Image Detection and Ranging (LIDAR) systemĬlementine (officially called the Deep Space Program Science Experiment ( DSPSE)) was a joint space project between the Ballistic Missile Defense Organization (previously the Strategic Defense Initiative Organization) and NASA, launched on January 25, 1994.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |