spysatGlobal Positioning System (GPS) – GPS- NAVSTAR properly (Global Positioning System – NAVigation Signal Timing And Ranging ) – one of the satellite navigation systems , created by the U.S. Department of Defense , including its coverage over the entire globe. The system consists of three segments : the space segment – 31 satellites orbiting the Earth at an average orbit , ground segment – control and monitoring stations on the ground and user segment – signal receivers . The purpose of the system is to provide the user with information about its location and to facilitate navigation in the area.
The measure consists in measuring the time of arrival of a radio signal from the satellites to the receiver. Knowing the speed of electromagnetic wave , and knowing the exact time of sending the signal , you can calculate the distance of the receiver from the satellites. The GPS signal contains the information about the layout of the satellites in the sky (the almanac ), and information about their theoretical way , and deviations from it (so-called ephemera ) . The GPS receiver in the first phase update this information in its memory, and later used to determine its distance from each satellite , for which the receiver is in range. By performing linear spatial Resection microprocessor receiver can calculate the geographical position ( longitude, latitude and altitude ellipsoidal ) and then give it to the selected reference system – the default is WGS 84 , as well as the current GPS time with very high accuracy .
GPS is operated and managed by the U.S. Department of Defense . Use its services can in principle everyone – just have a suitable GPS receiver. Such receivers are manufactured by independent commercial companies . The GPS system is free and so is expected to remain in accordance with the policy of the United States.
An essential element of the system is to identify signals from different satellites by the GPS receiver . This is done through the use of pseudo-random noise (PRN – Pseudo -Random – Noise ) . PRN in its main function is to digitally enhancing the transmitted signal (so we do not need huge plates for the reception of satellite signals ) and allows the Department of Defense to control access to the GPS system. As a result, the military can use the GPS signal to transmit encrypted messages.
GPS on your phone
GPS in the phone is undoubtedly a very useful function . Probably many of you , being in a new place , studied the area using just the technology. As everyone knows , using GPS can determine our location on a map , making it easy orientation in the field. However, beyond this basic GPS function often entails other additional .
What does the GPS on your phone?
Such interesting additions is undoubtedly geotagging . Roughly Geotagging is a feature that allows data connection made geographical coordinates of photography. With this solution , each picture taken in conjunction with the geotag is assigned to the exact location on the map. Who of you has never happened to forget where he made that scene ?
At the pre must remember , however, a few simple , but important concepts that will facilitate the use of GPS :
Fix – it is nothing like our first download the correct position.
Assisted GPS ( AGPS or A -GPS) – type GPS system , wherein in order to shorten the time required to determine the position of the first server uses the mobile network operator . This service , of course, must be available from the operator , otherwise the GPS will work , but the longer it takes the first ” connection to the satellites .” Also keep in mind that A -GPS in most cases will be a paid service because of the cost to the transmission of data by the operators.
Cold Start – is the process of determining the position of the first ( if your phone does not connect to the satellites in the last 4 hours) , which is in good weather conditions up to 40 seconds.
Warm Start – this process takes from 20 minutes to 4 hours after the last use of the navigation . It takes – depending on the model and the receiver – from 7 to 35 s
Hot Start – It takes time no later than 20 minutes after the last run of navigation. The 20 minutes is the time in which your phone is synchronized with GPS . This process takes time from 1 to 3 seconds .
GPS In older phones
Most new phones , especially smartphones , have a built-in GPS . But what to do when we have an older cell phone and do not want to change it , and the navigation is vital to us ? To do this you need to buy a GPS module that connects to your phone via Bluetooth . On popular auction sites or online stores for such a device will have to pay about 100$.
This solution is now becoming less popular , but used so far. The big advantage of an external GPS module is very often better quality receiver.
The article presents a basic overview of the Global Positioning System (GPS) and its applications in mobile phones. However, I strongly disagree with the author’s perspective on the limitations and capabilities of GPS technology. As someone who has extensively used GPS systems in various professional settings, I can attest to their incredible versatility and potential.
Firstly, let me address the author’s claim that GPS is limited to providing basic navigation information. Nothing could be further from the truth! With modern GPS systems, you can access a wealth of additional features such as geotagging, which allows you to assign geographical coordinates to photographs taken with your smartphone. This feature alone has revolutionized the way we document and share our experiences.
Moreover, GPS technology has far-reaching applications beyond navigation. For instance, it is used in precision agriculture to optimize crop yields, in emergency response systems to locate missing persons, and even in smart cities to improve traffic management. The potential of GPS is limitless, and it’s astonishing that the author would downplay its significance.
Now, let me offer some expert tips from my own professional experience:
1. Understanding signal strength: When using GPS on your phone, it’s essential to understand the concept of signal strength. A weak signal can lead to inaccurate location data or even loss of satellite connection. Make sure you’re in an open area with a clear view of the sky to ensure optimal signal reception.
2. AGPS and its limitations: While Assisted GPS (AGPS) can speed up the initial positioning process, it’s essential to note that this feature often requires a data connection, which may incur additional costs or even slow down your phone’s performance.
3. Cold Start vs. Hot Start: The author mentions the difference between Cold Start and Hot Start modes. However, it’s worth noting that modern GPS systems can switch between these modes seamlessly, ensuring minimal disruption to navigation services.
4. GPS modules for older phones: While purchasing a separate GPS module may seem like an unnecessary expense, it offers several advantages over built-in receivers, including improved signal quality and increased accuracy.
In conclusion, the author’s dismissive view of GPS technology is a narrow one. With its vast array of applications and capabilities, GPS has transformed the way we navigate, interact with our environment, and share experiences. As someone who has witnessed firsthand the power of GPS, I urge readers to explore beyond the basics and unlock the full potential of this incredible technology!
I love how Alayna is schooling us on the awesomeness of GPS technology! However, let me just throw in my two cents (or rather, a penny or two, considering the economic climate Mattel CEO is warning about).
I mean, who needs to navigate to grandma’s house when you can use geotagging to document your adventures and become Instagram famous? But seriously, Alayna makes some great points. I never knew that GPS had such far-reaching applications beyond navigation. It’s like the ultimate Swiss Army knife of technology.
And can we talk about signal strength for a second? I always thought it was just about having a clear view of the sky (aka not being in a cave). But apparently, there’s more to it than that. Thanks for the tip, Alayna!
One thing I do disagree with is the idea of purchasing separate GPS modules for older phones. I mean, isn’t that just like buying a new toy during a recession? Priorities, people!