| 摘要 |
An astronomical north finding system comprising a hand held computer having a designated software computer program operating in conjunction with an astronomical sighting device attached to an element to be northed; so that when the user feeds the said computer with data of the location and time, the said computer program works out the azimuth with respect to the selected celestial body to be sighted as a reference point; and the said computer displays the azimuth, correcting it continuously with time change; and the said element to be northed is sighted with respect to the said celestial body with the aid of said astronomical sighting device, and the user then reads the respective azimuth from the said computer, having thus northed the said element. |
