6.All weather operation: GPS observations can be made at any time within 24 hours of a day, not affected by the weather, cloudy and dark, rain and snow, rain and snow.
b) In the development process I first choose to use internet, because I think there are many useful informations that I can find, and “be familiar with internet” is also a reason for me to use internet. First of all, I went to Wikipedia to find the information I needed, and then he summed it up as a more concise statement. Then I opened the Microsoft Word, divided page into several parts, set up some text books, then wrote the statement in the text box. After that, Adjust the size of the word and the text box, colored the word and text box with the color you like. Finally, added the pictures copied from