The Lightning Imaging Sensor (LIS) science team and MSFC DAAC announce the availability of global lightning data sets from the Optical Transient Detector (OTD) experiment. The OTD is a prototype of the LIS instrument scheduled to fly on TRMM in 1997. OTD was launched by the Orbital Sciences Corp. in April 1995 and is a payload on the MicroLab1 satellite. The current data release contains 15 months (April 1995-June 1996) of reprocessed data. You can learn more about this data set at: http://wwwdaac.msfc.nasa.gov:/userservices/whatsnew.html, or contact Steve Goodman (steven.goodman@msfc.nasa.gov), tel.: (205) 922-5891; Fax: (205) 922-5723.