Apr 24 – Apr 29 0000Z – 2359Z NN4SA, Huntsville AL. 25th anniversary of Hubble Space Telescope launch. The NASA Marshall Space Flight Center ARC will be operating various bands and modes during this time. See this page http://nn4sa.wordpress.com for information and DX spotting clusters for frequencies and times. Special QSL for business sized SASE to Marshall ARC, c/o Don Hediger ES32, Huntsville, AL 35812. nn4sa.wordpress.com . By this time we may well be station NN4SA, we are waiting on our vanity call sign.