在光度計生產商的網址
http://www.unihedron.com/project ... e/?allreadings=true,
有一批去年數據是關于港島摩星嶺 (Mt Davis) 和 長洲明輝營 (Ming Fai) 的天空質素,Reading 以 magnitude/square arcsec 為單位,用舊款無透鏡聚焦的 SQM 測星 (舊款視場 80 度,新款 SQM-L 視場 20 度),我將這些數據轉成 text format 如下:
Date ______Time__Reading__Zenith__Sky-Condition___________Place
2007-06-22 18:30 18.33 Away clear, 10% cloud cover Mt Davis
2007-06-22 18:30 18.41 Away clear, 10% cloud cover Mt Davis
2007-06-22 18:28 18.69 Up clear, 10% cloud cover Mt Davis
2007-06-22 17:30 17.90 Away clear, 10% cloud cover Ming Fai
2007-06-22 17:30 18.39 Away clear, 10% cloud cover Ming Fai
2007-06-22 17:30 17.93 Away clear, 10% cloud cover Ming Fai
2007-06-22 17:30 18.76 Away clear, 10% cloud cover Ming Fai
2007-06-22 17:24 19.55 Up clear, 10% cloud cover Ming Fai
2007-06-21 17:30 18.56 Up clear, 30% cloud cover Mt Davis
2007-06-21 17:30 16.91 Away clear, 30% cloud cover Mt Davis
2007-06-21 17:30 17.88 Away clear, 30% cloud cover Mt Davis
2007-06-21 17:30 18.44 Away clear, 30% cloud cover Mt Davis
2007-06-21 17:30 18.44 Away clear, 30% cloud cover Mt Davis
2007-06-20 17:35 18.56 Up clear, 10% cloud cover Mt Davis
2007-06-20 17:35 17.87 Away clear, 10% cloud cover Mt Davis
2007-06-20 17:35 16.92 Away clear, 10% cloud cover Mt Davis
2007-06-20 17:35 16.91 Away partly cloudy, 10% cloud cover Mt Davis
2007-06-20 17:35 18.44 Away clear, 10% cloud cover Mt Davis
2007-06-19 17:25 18.26 Away clear, 20% cloud cover Mt Davis
2007-06-19 14:20 16.92 Up partly cloudy, 70% cloud cover Mt Davis
睇落明輝營天空質素尚好 (無雲時天頂 reading 達 18~19+,相當于可見星等 ~4.5,又無咁多蚊咬,seeing 或者好小小添。
如果有埋全港其他 “dark sites” 數據就更好。
AC |