NOAA/Systems Acquisition Office (SAO), 1315 E. W. Highway, Mail Code SAOX2, Silver Spring, MD 20910

66 -- SOLAR TRACKER SOL 52-SPNA-9-00011 DUE 051999 POC Donald M. Thompson, Contracting Officer, 301-713-2110 The solar tracker shall be capable of tracking the sun's position, unattended, for an extended period of at least two weeks. It shall be capable of carrying three pyrheilometers that are trained on the solar disk, as well as carry on a horizontal platform, that rotates through the solar azimuth diurnally, three Eppley-type radiometers (models PSP and PIR) that measure total and diffuse solar and thermal infrared radiation falling on a horizontal surface. Two of these instruments, one PSP and one PIR, must be shaded throughout the daylight hours. Besides the software and robotics that "blindly" compute and track the solar position diurnally and annually, the tracker is required to have a sun-seeking algorithm, which also is able to compute and track the solar position diurnally and annually, the tracker is also required to have a sun-seeking algorithm, which also is able to function in several optional modes. An essential feature of the tracker is that it be programable via modem allowing remote operations. Posted 04/27/99 (W-SN325003). (0117)

Loren Data Corp. http://www.ld.com (SYN# 0319 19990429\66-0012.SOL)