| タイトル | Instrument for Analysis of Greenland's Glacier Mills |
| 本文（外部サイト） | http://hdl.handle.net/2060/20100019602 |
| 著者（英） | Behar, Alberto E.; Tran, Hung B.; Lutz, Colin; Martin, Sujita; Elliot, Andrew; OHern, Sean; Steffen, Konrad; McGrath, Dan; Wang, Henry; Phillips, Thomas; Matthews, Jaret B. |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech. |
| 発行日 | 2010-05-01 |
| 言語 | eng |
| 内容記述 | A new instrument is used to study the inner workings of Greenland s glacier mills by riding the currents inside a glacier s moulin. The West Greenland Moulin Explorer instrument was deployed into a tubular shaft to autonomously record temperature, pressure, 3D acceleration, and location. It is built with a slightly positive buoyancy in order to assist in recovery. The unit is made up of several components. A 3-axis MEMS (microelectromechanical systems) accelerometer with 0.001-g resolution forms the base of the unit. A pressure transducer is added that is capable of withstanding 500 psi (=3.4 MPa), and surviving down to -40 C. An Iridium modem sends out data every 10 minutes. The location is traced by a GPS (Global Positioning System) unit. This GPS unit is also used for recovery after the mission. Power is provided by a high-capacity lithium thionyl chloride D-sized battery. The accelerometer is housed inside a cylindrical, foot-long (=30 cm) polyvinyl chloride (PVC) shell sealed at each end with acrylic. The pressure transducer is attached to one of these lids and a MEMS accelerometer to the other, recording 100 samples per second per axis. |
| NASA分類 | Man/System Technology and Life Support |
| レポートNO | NPO-46514 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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