radio heliograph[天] 射电日象仪;电波日象仪
heliograph h日照计
heliograph paper照相版纸;日光照相纸
monochromatic heliograph单色日光仪
heliograph signaling太阳反光镜
triangulated heliograph survey三角高程测量
N（名词） an instrument with mirrors and a shutter used for sending messages in Morse code by reflecting the sun's rays 太阳光度计