*********************************************************** From: Ashley Davies <Ashley.Davies@xxxxxxxxxxxx> *********************************************************** Dear Colleagues Volcanic thermal emission was detected on August 27 2007 from Oldoinyo Lengai, Tanzania, by the NASA Earth Observing-1 (EO-1) spacecraft. Onboard EO-1 are the Hyperion hyperspectral imager and the ALI multispectral imager, both of which cover visible and short-wavelength infrared (SWIR) wavelengths. Hyperion data (30m/pixel) show two very bright sources in the summit crater with spectra consistent with hot, erupting lava. There is also an indication of a short lava flow, flowing from the crater to the northwest. Based on a preliminary analysis of the Hyperion data, effusion rate at this time is estimated at ~0.5 m3/s. As part of the Jet Propulsion Laboratory (JPL) Volcano Sensor Web, the EO-1 observation was triggered autonomously by an alert from the MODVOLC system (which processes MODIS data) at the University of Hawaii. Hyperion data are processed onboard EO-1 by the Autonomous Sciencecraft Experiment (ASE). Notification of the detection of anomalous thermal emission was received at JPL from ASE within two hours of data acquisition. The Hyperion data were downlinked and processed at JPL within 36 hours of acquisition. The entire detection, alert, spacecraft retasking, onboard data processing and product transmission cycle is autonomous, and therefore rapid. Ashley Davies, JPL. Ashley.Davies@xxxxxxxxxxxx Ashley Davies, Ph.D. Lead Scientist, NMP-ST6 Autonomous Sciencecraft Experiment Asteroids, Comets and Satellites Group (3224) ms 183-501 Jet Propulsion Laboratory 4800 Oak Grove Drive Pasadena, CA 91109-8099 tel: 818-393-1775 fax: 818-393-4445 email: Ashley.Davies@xxxxxxxxxxxx JPL webpage: http://science.jpl.nasa.gov/people/ADavies/ "Volcanism on Io: A Comparison with Earth": Davies (2007) http://www.cambridge.org/catalogue/catalogue.asp?isbn=9780521850032 ============================================================== To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxxx To contribute to the volcano list, send your message to: volcano@xxxxxxxx Please do not send attachments. ==============================================================
