GPS - Hệ thống định vị toàn cầu

Cảm ơn bác gps, vấn đề đặt ra của bác em cũng đã nghĩ qua nhưng nó không khả thi vì thứ nhất cái bo đó nó nhỏ quá (37.85x25.4 mm) nên em chẳng có được cái đầu mỏ hàn nào phú hợp, thứ hai lá cái đầu cắm đó nó hàn dán nên em bó tay vì em chả biết hàn dán nó thế nào??. Cảm ơn bác vì bác đã giúp đỡ.
Tiện đây em hỏi luôn các thiết bị GPS mà bac đã từng dùng nó chỉ co tính năng hiênt thị vị trí của ta thôi à thế nó còn tinh năng nào khac không??

1) Xem giờ, thay đồng hồ ! (Rất chính xác!)
2) Một vài cái có thể xem thời điểm mặt trời mọc và lặn.
3) Một vài cái có thể đo nhiệt độ, độ ẩm
4) Đập đá nếu đủ nặng.

Chúc tìm được nhiều ứng dụng khác !

Hay đấy nhẩy, bác đập đá thử chưa . Còn tính năng nào nữa hay không??

You can use maps stored in the receiver''s memory, connect the receiver to a computer that can hold more detailed maps in its memory, or simply buy a detailed map of your area and find your way using the receiver''s latitude and longitude readouts. Some receivers let you download detailed maps into memory or supply detailed maps with plug-in map cartridges.
A standard GPS receiver will not only place you on a map at any particular location, but will also trace your path across a map as you move. If you leave your receiver on, it can stay in constant communication with GPS satellites to see how your location is changing. With this information and its built-in clock, the receiver can give you several pieces of valuable information:
How far you''ve traveled (odometer)
How long you''ve been traveling
Your current speed (speedometer)
Your average speed
A "bread crumb" trail showing you exactly where you have traveled on the map
The estimated time of arrival at your destination if you maintain your current speed
To obtain this last piece of information, you would have to have given the receiver the coordinates of your destination, which brings us to another GPS receiver capability: inputting location data.

Cái này đăng 1 lần rồi, ai đã đọc rồi thì bỏ qua nhé
What can you do with a GPS and why would you want one.
They are a great deal of fun to use.
They are useful if you get lost and you have a map that gives UTM or lat/lon coordinates.
You can actually follow yourself on a map in real time display which allows planning turns, stops, etc if your unit has output capability.
You can answer the question "Are we there yet?"
Did I mention they are fun?
You can find where you left your car.
Lets you tell the AAA where to send the tow truck.
You can set waypoints and see directions to get there.
You can record the exact path you took to get somewhere and play it back later for someone else to see.
You can prove how fast you were going when stopped by the cops.
You can use it as a compass (if you''re moving).
When camping, you can use it to find your camp when you go on a hike or to town.
You can use it to estimate arrival times.
Did I mention they are fun?
You can calibrate your speedometer.
You can use it as a speedometer if yours is missing or broken.
You can use it as a trip meter.
With the right database you can find restaurants and other things.
You can plan a trip ahead of time and the unit will even tell you where to turn.
You can use the info from a GPS to program your dbs satellite receiver.
If it is connected to a cell phone you can give the police your cell phone number and they can track your stolen vehicle (some extra cost accessories required).
You can locate the spot where the fish were biting.
You can amaze your friends.
You can find your altitude within a hundred feet.
You can find out exactly what time it is.
Did I mention they are fun?
You can go back the same way you came easily.
If something flies out of the window you can mark the spot and return to the exact place.
You can amuse yourself on public transportation.
You can use it to learn something about navigation.
You can remember the location of that place you only go to once a year.
It can be a great navigation calculator. For example it will tell you how far apart two places are if you know their locations.
Many units can tell you when the sun will rise and set.
Marine users can find plenty of uses from the above list plus a few more.
If someone falls overboard you can return and find him or her.
In conjunction with a chart you can avoid shallow water.
You can avoid submerged objects.
You can know where you are without any landmarks.
They are just as much fun on a boat.
You can find the next buoy in the race or the trip home.
You can see if your drifting.
You can hook it to your fish finder.
You can see true speed and distance over the ground.
You can win log races (if they let you use it).
You can use it to drive your self steering system.
Other uses for a GPS include:
Documenting the location of that neat photograph.
Having something useful to talk about on your home video.
Doing some amateur surveying.
Finding the altitude of your house.
If you have a combined GPS/cell phone your friends can watch you move around on the internet if you wish.
A couple of combined GPS/frs walkie talkies can be used to keep contact and help if one person gets lost.
Helps you justify the palm top you wanted to buy.
Instantly find your location on an electronic map.
You can use the backlight for a flashlight in a pinch.
Figuring out where the cruise ship or airplane is.
Setting your clock.
Teaching your kids about maps, navigation, and geography.
There are plenty of other users as well. These include aviators, hikers, bicyclists, motorcyclists, skiers, joggers, fishermen, hotair balloonists, kayakers, surveyors, astronomers, and lots more.
...And, how about hobbies and Games
A GPS can be used to enhance your hobbies or to develop some new ones. Here is a list of some unusual items.
Some folks install a GPS in their model airplanes. Later, after the flight is over they can download a track and see where it went.
Ever wonder where your dog goes at night? Install a GPS on his back and when he returns you can find out.
You can search for confluences. These are spots on the earth where the lat/lon numbers all zero out to an exact whole degrees. There are folks that think these are fun places to find! You can also look for government survey markers scattered around the world.
Other folks have set up hidden treasures (called geocaches) that can be located by GPS. Don''t expect to find a million dollars though.
Maybe your next progressive dinner won''t include any tra***ional addresses but only lat/lon coordinates. No cheating by saying whose house it is.
Some cameras can include location data right on the picture or perhaps you can just take a picture with your GPS in the foreground.
Golfers can use a GPS to display the distance to the pin. Useful for picking the right club to use.
A hunter might find that deer stand he/she used last year.
Some of the newer GPS units even have games built in.
What about your job?
Certainly many jobs spring to mind when thinking about a GPS. For example a surveyor, a pilot, or a ships captain, but how about a few more unusual uses.
How about for a rural newspaper route? Perhaps the papers would even get delivered when you were sick.
How about a real estate agent who wants to show a house in a strange neighborhood without getting you and the client lost?
How about any job that collects field data? Wouldn''t the location where the data was found be useful?
How about a farmer? Useful to manage those microclimates on your property.
Besides, why shouldn''t work be fun too?
Other User''s Contributions
It seems that some other users have come up with some interesting contributions for how they might use their GPS. Here are a few.
Stephan Pataro over at GPS-hotspots.com contributed the following uses:
Find your wedding.
Find the rest of the Atocha Treasure. (Must be one of those hotspots he is alway hollering about. -dd)
Locate your house after a Tornado. (Well, your house site at least. -dd)
Find anything in snow, sand, or darkness.
Send friends to EXACTLY the wrong place.
You get to use the excuse "I must have transposed my coordinates."
A. E. Mathrone is a paramedic and he uses his GPS to let the Air Ambulance know exactly where the scene is so they can land near by to pick up the patient.
Lee Gruenfeld uses his gps to find the extra ski he drops when he goes slalom skiing. He reports the MOB function is quite useful.
A woman who calls herself Foopa reports that a hidden GPS can be used to see what her husband was up to the previous evening. (Probably not a recommended use for family harmony. -dd)
John King is a firefighter for the City of Daytona Beach and during the Wildfires of 1998 he directed the helicopters flying in water drops by radioing in the information from his hand held GPS.
John Bennett reports that a GPS can provide guidance data when a wet snow has covered all of the road signs rendering them useless. (A GPS should also help at night, I would think, for similar reasons. -dd)
An email from Funneman1 says he uses his GPS to find his favorite ice fishing spot from year to year. "You can also find your snowmobile if it gets buried in the snow when you go for help."
An email from Boots says, "I drive tow truck in rural America, after dropping off costumers in the bay area GPS leads me home better than customers saying go down to the big safeway, hang a right and follow the non existent signs."
Rodd Westwood says, "I use mine as a speedo on my hovercraft, the only way to get an accurate speedo."
Chet Long says, "I use my GPS when I go on my daily exercise walk. It shows my how fast I am walking and if in a new area or different route I know how far I have gone so I don''t exercise too much. I''d hate to overdo it."
How about the rest of you? Do you have any interesting uses?

Hê hê, bài này em đọc rồi mà quên mất. Lại phiền bác gps phải post lại, phiền quá . Chả là em đang đình từ cái bo đó để làm cái gps nền cần xem thường thường thì các gps có các tính năng gì để xem có thể làm được không.
Hy vọng là được.

Hic VN2000 là bí mật quốc gia hay tiêu chuẩn quốc gia bác GPS. Đã là tiêu chuẩn thì còn gì bí mật nữa ???

Bạn đã nói đúng rằng VN2000 là tiêu chuẩn quốc gia. Gps đã có trích thông tin từ trang web của Trung tâm Tài nguyên thuộc Bộ Tài nguyên và Môi trường tại http://home.ciren.gov.vn/vn/view.asp?news_ID=6 trong đó có đoạn:
Việc tính chuyển toạ độ giữa hệ WGS-84Quốc tế và hệ VN-2000 được tính chính xác theo công thức tính chuyển 7 tham số(3 tham số dịch chuyển gốc toạ độ, 3 tham số góc xoay trục toạ độ Euler,1 tham số tỷ lệ chiều dài). Các tham số tính chuyển là tài liệu bí mật quốc gia. Tổng cục Địa chính chỉ cung cấp toạ độ trong hệ WGS-84 cho từng điểm theo yêu cầu.
Như vậy VN2000 cũng là bí mật quốc gia, bạn đồng ý chứ.
[topic]136135[/topic]

GPS 2R-12 SATELLITE LAUNCHED
Finally GPS satellite 2R-12 was launched on the evening of Wednesday, 23 June. It has been designated as SVN60/PRN23. It will be placed in Plane F, Slot 4 to replace the current PRN01/SVN32 (launched 22 Nov 1992), which will be shifted to a spare location.
For more information, see: http://www.spaceflightnow.com/delta/d305/status.html
June 23, 2004

Người Mỹ và châu Âu đã đồng ý kết thúc một bất đồng về các hệ thống định vị vệ tinh. Thỏa thuận giữa đại diện của hệ GPS của Mỹ và Galileo sẽ được ký vào ngày mai, 26 tháng 6 năm 2004 tại hội nghị thượng đỉnh Mỹ và châu Âu ở Ireland. Đây là bước tiếp theo của những thỏa thuận đạt được trước đây ở Bỉ nhằm bảo đảm rằng hai hệ thống không gây nhiễu lẫn nhau nhưng vẫn bảo đảm được sự tương thích giữa chúng.
Nguồn: http://washingtontimes.com/upi-breaking/20040621-120748-1757r.htm