Global Positioning System- GPS


Pezzonovante

Pezzonovante

JF-Expert Member
Joined
May 1, 2008
Messages
643
Likes
6
Points
0
Pezzonovante

Pezzonovante

JF-Expert Member
Joined May 1, 2008
643 6 0
Global Positioning System (GPS), space-based radio navigation system, consisting of 24 satellites and ground support, that provides accurate, three-dimensional position, velocity, and time, 24 hours a day, everywhere in the world, and in all weather conditions. Because the user does not communicate to the satellite, GPS serves an unlimited number of users.

GPS is available in two basic forms: Standard Positioning Service (SPS) and Precise Positioning Service (PPS). SPS provides a horizontal position that is accurate to 100 m (109 yds). PPS horizontal accuracy is 20 m (22 yds). For authorized users, usually the US military and its allies, PPS also provides greater resistance to jamming and immunity to deceptive signals (antispoofing).

. HOW GPS WORKS

GPS Satellite A total of 24 US Global Positioning System (GPS) satellites orbit overhead and provide accurate positioning and navigation information for both military and civilian use. Solar cells power each satellite and its atomic clocks. Antennas on a satellite continuously transmit timing information from the clocks. The signals can be picked up and processed by a GPS receiver to determine exact location and altitude.The NAVSTAR Global Positioning System Joint Program Office

GPS satellites carry atomic clocks that measure time to a high degree of accuracy. The time information is placed in the codes broadcast by the satellite so that a receiver can continuously determine the time the signal was broadcast. The signal contains data that a receiver uses to compute the locations of the satellites and to make other adjustments needed for accurate positioning. The receiver uses the time difference between the time of signal reception and the broadcast time to compute the range to the satellite. The receiver must account for propagation delays caused by the ionosphere and the troposphere. With three ranges to three satellites and knowing the location of the satellite when the signal was sent, the receiver can compute its three-dimensional position.
 
M

Mwikimbi

JF-Expert Member
Joined
Mar 8, 2008
Messages
1,752
Likes
136
Points
160
M

Mwikimbi

JF-Expert Member
Joined Mar 8, 2008
1,752 136 160
Asante Mkuu, Ebu Tuagizie Namna Ya Kupata Hii Kitu Na Bei Yake, Unajua Tulioko Huko Bongo Ingetusaidia Sana, Hasa Kwenye Field Yetu Ya Engineering, Inaweza Pia Ku=measure Horizontal Distances In High Accuracy
 
Pezzonovante

Pezzonovante

JF-Expert Member
Joined
May 1, 2008
Messages
643
Likes
6
Points
0
Pezzonovante

Pezzonovante

JF-Expert Member
Joined May 1, 2008
643 6 0
Zoombak GPS Car Locator
Locate Car Real-Time.Get Text Alert
& Email About Your Car's Location.
Zoombak.co.uk/CarLocator

BlackBerry® Bold™ 9000
Get The Most Powerful And Fastest
BlackBerry® Available Now On 3G.
BlackBerry.com/UK

Fleet Vehicle Tracking
Low-cost Fleet Management Solution
Book FREE onsite demonstration NOW
www.WheresMyFleet.com

GPS Vehicle Tracking
Web based GPS Vehicle Tracking
Real time GPS Vehicle Tracking
www.trackyou.co.uk
 
Buswelu

Buswelu

JF-Expert Member
Joined
Aug 16, 2007
Messages
2,002
Likes
67
Points
145
Buswelu

Buswelu

JF-Expert Member
Joined Aug 16, 2007
2,002 67 145
Hizi GPS(Global Positioning System) Ambazo ni ndogo za mkononi unaweza kutembea nazo...kama watu wa land & survey watakuwa nazo.

Kisha kuna DGPS(Differential Global Positioning System (DGPS) hizi ni kubwa kidogo unaweka mgongoni wanatumia sana kwatu wa survey,mining,exploration..kwa ajiri ya kazi tofauti tofauti....

Katika accuracy zinatofautiana hizi ndogo na kubwa....kwani ndogo inaweza kuwa accuracy yake ina tofauti ya 5meter kutoka kwenye point ya uhakika ambayo kwa DGPS tofauti tokwa kwenye point kamili ni one meter to 2 meter ambayo si mbaya sana.

Kupatikana kwa tanzania sijui ni wapi ila south africa wanaziuza na kukodisha hizi DGPS na GPS.

Kwa kuwa wao wana advance kwenye mambo haya....kama utapenda kupata yako ingawa ni bei ghali sana na inabidi uwe na kazi nayo ili iweze kukusaidia.
Naweza kukupa link website na tell phone number ukawatwangia ukaona.

Good day
Buswelu
 
Pezzonovante

Pezzonovante

JF-Expert Member
Joined
May 1, 2008
Messages
643
Likes
6
Points
0
Pezzonovante

Pezzonovante

JF-Expert Member
Joined May 1, 2008
643 6 0
....kama utapenda kupata yako ingawa ni bei ghali sana na inabidi uwe na kazi nayo ili iweze kukusaidia.
Naweza kukupa link website na tell phone number ukawatwangia ukaona.
OK, MKUU BUSWELU NASHAULI WEKW HIZO LINK PEUPE ILI WANANZENGO WAPATE KUPONA.
 
Buswelu

Buswelu

JF-Expert Member
Joined
Aug 16, 2007
Messages
2,002
Likes
67
Points
145
Buswelu

Buswelu

JF-Expert Member
Joined Aug 16, 2007
2,002 67 145
Haya wakuu contact hizo hapo...mnaweza kuwasiliana nao.

Tel: 012 658 0652

Fax: 012 658 0564

Mobile: 084 686 2237


Physical Address: Building 2, (Unit C2 & D2)

Bondev Office Park, Cnr Willem Botha & Wierda Road, Eldoraigne Ext 48, Centurion, 0157

Postal Address: P O Box 612, Milnerton, 7435
Cape Town, South Africa
Website: www.omnistar.co.za

Hapo sasa PEZZONOVANTE AND Invisible.
 
G

Game Theory

JF-Expert Member
Joined
Sep 5, 2006
Messages
8,570
Likes
114
Points
0
G

Game Theory

JF-Expert Member
Joined Sep 5, 2006
8,570 114 0
kwani Galileo bado?
 
N

Ngereja

JF-Expert Member
Joined
Feb 27, 2007
Messages
797
Likes
28
Points
45
N

Ngereja

JF-Expert Member
Joined Feb 27, 2007
797 28 45
GALILEO iko kwenye testing stage and will be fully operational by 2010. So far, there is more than one global navigation satellite systems, these are NAVSTAR GPS owned by US DoD, GLONASS (GLobal NAvigation Satellite System) owned by Russia, the Rusian system is merely for the Military application, and the Coming GALILEO of the European Union. Chinese government also operates their own navigation system.

The three Systems (GPS, GLONASS and GALILEO) will be fully interoprable, hence increasing positional accuracy for civilian users. With Satellite systems, one can achieve an accuracy of up to millimetre level depending on positioning techniques used. mm accuracy can be achieved only with Geodetic receivers using differential or carrier phase measurements. With DGPS (with single geodetic receiver ) one can achieve a sub-metre and sub-centimetre accuracy.

With hand-held GPS receiver, one can achieve 15 up to 100 metres accuracy.
 
G

Game Theory

JF-Expert Member
Joined
Sep 5, 2006
Messages
8,570
Likes
114
Points
0
G

Game Theory

JF-Expert Member
Joined Sep 5, 2006
8,570 114 0
ile ofisi ya Galileo pale ATC bado ipo ?
 
Mwiba

Mwiba

JF-Expert Member
Joined
Oct 23, 2007
Messages
7,614
Likes
226
Points
160
Mwiba

Mwiba

JF-Expert Member
Joined Oct 23, 2007
7,614 226 160
Hizi zinafanya kazi Tanga tu ambako mitaa ina nambari,sasa sehemu kama dar ambako hakuna namba kuna majina ya mitaa ,sidhani kama GPS itaweza kukwambia kata kushoto ila tanga inakuonyesha kabisa bara ya kwanza mpaka ya 21 karibu mgandini.
 

Forum statistics

Threads 1,235,547
Members 474,641
Posts 29,226,424