Abstract　 　 
The Submillimeter Array (SMA) is a pioneering radio interferometer dedicated to the observation of the submillimeter sky at angular resolutions of 1 to 30 arc seconds. Since its full scale operation 10 years ago, the SMA has made important contributions to astrophysics from planetary science, star formation to submillimeter galaxies.

The SMA is also the de facto pre-cursor of the more powerful ALMA, for which it has paved the way and has laid down a strong technological foundation. As ALMA moves into full scale science operation over the next few years, the SMA is re-positioning itself by making way for new capabilities. The key upgrade under planning is a new wideband receiving system, which will have instantaneous sky coverage of up to 72 GHz. To make this possible, new ultra-wideband SIS receivers and backend electronics running at blazing speeds have to be developed.

Running in parallel with the SMA wideband upgrade is the new Greenland telescope initiative. The Smithsonian Observatory, in collaboration with ASIAA, Taiwan, is planning to move a 12-meter telescope (an ALMA prototype dish) to Greenland. While the primary mission of the project is to provide anorthern anchor point for the submillimeter VLBI campaign to observe the massive black hole in M87, plans are being made to equip the Greenland telescope with diverse instrumentation ranging from THz multi-beam receivers to multi-color wide-field bolometric camera.