NASA/Langley Research Center, Mail Stop 144, Industry Assistance Office, Hampton, VA 23681-0001

66 -- RADIOSONDE BALLOON SENSORS SOL 1-074-CAE.5160 DUE 030599 POC Artistine Lethcoe-Reid, Purchasing Agent, Phone (757)-864-2432, Fax (757) 864-9774, Email A.LETHCOE-REID@larc.nasa.gov -- James W. Cresawn, Contracting Officer, Phone (757)-864-2500, Fax (757) 864-7898, Email J.W.CRESAWN@larc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/LaRC/date.html#1-074-CAE.5160. E-MAIL: Artistine Lethcoe-Reid, A.LETHCOE-REID@larc.nasa.gov. This is a modification to the synopsis entitled Radiosonde Balloon Sensors 1-074-CAE.5160 which was posted on 02/19/99. You are notified that the following changes are made to the first 3 sentences: 100 Each of a temperature, pressure and relative humidity radiosonde balloon sensors conforming specifications produced by Vaisala. Each unit must include an ozonesonde interface kit and be updated for a global position sounding receiver. These instruments will be used for NASA LaRC SAGE III validation activities at established international measurement sites. The due date for receipt of quotes is extended to March 5, 1999. Documents related to this procurement are available over the Internet and are in Microsoft Office Suite (Word 6.0, Excel 5.0, or PowerPoint 4.0) format and will reside on a World Wide Web (WWW) server, which may be accessed using a WWW browser application. The WWW address or URL of the NASA/LaRC Business Opportunities home page is http://procurement.nasa.gov/EPS/LaRC/class.html Offerors are responsible for monitoring this site for the release of the solicitation and any amendments. Potential offerors are responsible for downloading their own copy of the solicitation and amendments (if any). Posted 02/24/99 (D-SN301954). (0055)

Loren Data Corp. http://www.ld.com (SYN# 0333 19990226\66-0011.SOL)