NOAA 11 was a third-generation operational meteorological satellite for use in the National Operational Environmental Satellite System (NOESS) and for support of the Global Atmospheric Research Program (GARP) during 1978-84. The satellite design provided an economical and stable sun-synchronous platform for advanced operational instruments to measure the earth's atmosphere, its surface and cloud cover, and the near-space environment. Primary sensors included (1) an advanced very high resolution radiometer (AVHRR) for observing daytime and nighttime global cloud cover, (2) a TIROS operational vertical sounder (TOVS) for obtaining temperature and water vapor profiles through the earth's atmosphere, and (3) a solar backscatter ultraviolet spectrometer (SBUV/2) for providing ozone distributions in the atmosphere. The secondary experiment was a data collection system (DCS), which processed and relayed to central data acquisition stations the various meteorological data received from free-floating balloons and ocean buoys distributed around the globe. A search and rescue (SAR) system was also carried on NOAA-H to receive, process, and relay distress signals transmitted by beacons carried by civil aircraft and some classes of marine vessels. The satellite was based upon the Block 5D spacecraft bus developed for the U.S. Air Force, and was capable of maintaining an earth-pointing accuracy of better than plus or minus 0.1 deg with a motion rate of less than 0.035 deg/s.
1 19531U 88089A 12339.13636021 .00000261 00000-0 15728-3 0 1517 2 19531 098.7252 060.6521 0012031 097.3233 262.9306 14.14995024248548