Friday, April 25, 2014

Thursday, April 24, 2014

Phantom 2 Vision first 900 feet

第一次飛高過900 呎,但 camera frozen


Wednesday, April 23, 2014

50 mag 25 TNO per sq deg

聰明的天文學家如何從 1/3 平方度的哈勃存檔舊照片中,發現14 顆 25、26 等 TNO!

http://www.universetoday.com/73501/astronomers-find-14-new-trans-neptunian-objects-hiding-in-hubble-data/

Tuesday, April 22, 2014

AM730 April 23, 2014


19848 light curve

First the asteroid light curve




Now they make a model


Saturday, April 19, 2014

Little discovery

難以想像,平時大約只要飛到300 呎左右,wifi 便開始收不到四翼機的鏡頭影像。

原來只要以外置電源為wifi extender 充電(左上圖),便可飛到500呎仍收到影像(右上圖)!

Sunday, April 13, 2014

Oh, have not update my blog for a long time.