度角尺度干涉仪 (Degree Angular Scale Interferometer，DASI)是位于南极的一座天文望远镜。这个干涉仪拥有13个透镜波纹喇叭（lensed corrugated horn），操作频率在26 and 36 GHz之间共分为十个频带。这仪器的设计与宇宙背景成像仪（Cosmic Background Imager）与极小阵列类似。2002年，DASI团队首先宣布发现宇宙微波背景的偏振各向异性。[1]
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