Because the GPS has to search for the signal emitted by at least 4 satellites in order to calculate its position, once any type of receiver is newly installed, it must execute a sequence called a cold start. This means that it will search for the signal from each of the 27 satellites and based on what it finds it will identify its satellite of origin and then it will be able to calculate its position. This means that the time it will take to calculate your position for the first time will be between 5 and 10 minutes, depending on the quality of the signal you receive. Once the receiver obtains this data, the next calculations will be much faster, on the order of 0.3 s and 1 min on reset.

In the same way, if the receiver is located in a closed place, such as a parking lot, it will not be able to detect the signal from the satellites and therefore will not be able to calculate its position at that moment. However, highly sensitive GPS receivers have been developed that can detect weaker satellite signals, even if they are attenuated by walls or adverse atmospheric conditions, although not in environments that are hostile to signals, such as underground parking lots, etc.

The operation of a GPS system supported by GPRS would be as follows:

1. Modem recognizes movement in distance (Position)

2. Sim inside the modem sends a data packet with the location

3. Cellular network receives data packets and transfers them through the established APN (Private connection)

4. Decode data packet (Location translation to place it on a plane)

5. Insertion of coordinates (longitude, latitude) into a map (Tracking Platform).

In the case of data transmission, in the beginning the main medium was the radio, later cellular technology was used (generating a call) or through text messages (SMS). Currently, most modern systems use cellular technologies designed for data transmission such as GSM/GPRS, CDMA/1xRTT and EDGE among others, taking advantage of the great coverage of these data networks today and the advantage that transmission charging is normally carried out by kilobytes transmitted and not by connection time.

Additionally, given the low costs and the minimum bandwidth used by this technology, the use of satellite technology for data transmission is becoming more common, with the advantage of its global coverage anywhere on the planet, which is essential for applications such as navigation, mining or forestry that work in areas where there is normally no cellular network coverage.

AVL technology is a powerful tool in transportation fleet management applications, emergency vehicle allocation, public transportation systems, etc. especially if it is integrated with other related applications such as Call Center systems, Central Monitoring, route planners, warehouse systems and WMS and dispatch systems among others.

Nowadays, when most people think of GPS they are actually thinking of AVL since GPS equipment is part of AVL technology but it does not involve transmitting position data to a remote location, but rather using it locally, as a mountain climber or a desert rally competitor might do.

This technology can offer competitive advantages to a company since with the automated vehicle tracking system it is possible to reduce delivery times using a data collection sheet, and thus analyze the speed with which its fleet advances, the time and place in which it is located, blockages, delays, optimizing its deliveries, therefore, having exact itineraries, offering better service to its client.

It is a tool that can optimize the supply chain, since it will allow us to have better logistics, being able to control times and movements of truck operators, compile transportation times, mark defined routes and thus avoid loss of time.

It can help reduce costs, since with this system it is possible to know the amount of fuel the vehicle uses, information on how much the driver accelerates or brakes, thus allowing the wear of parts to be calculated, the air pressure exerted on the vehicle depending on the places it travels; All of this is used to schedule corrective maintenance") or perform preventive maintenance"), and therefore reduce costs.

Another common use of RVA is to secure the cargo being transported, considering that it has considerable value, since the system allows the vehicle to be found in the event of theft; there are providers that offer legal advice and promise to recover the vehicle in a short time.

It is a tool that allows us to offer value-added services such as active monitoring, where the monitoring center carries out continuous monitoring via the GPS platform and by telephone with the operator in order to carry out the established protocol of authorized route, authorized stops, authorized times in order to comply with the security and logistics required by the client.[2]​.

Each provider of this service offers useful advantages that, depending on your needs, must be analyzed and chosen to achieve greater benefits in your company. These can be considered an excellent source of information and the best resource to better understand the operation and use of this technology. Among the products that different companies offer and use are different online systems, that is, wireless data transmission systems which vary depending on their use and range from SMS messages, Internet portals, hidden devices, GPS, geo-locators, among others.

GOMEZ, GUILLERMO. Functional testing manual for monitoring, Ed. CIRCULO CORP, México, 2016. Pp 1-10.

Because the GPS has to search for the signal emitted by at least 4 satellites in order to calculate its position, once any type of receiver is newly installed, it must execute a sequence called a cold start. This means that it will search for the signal from each of the 27 satellites and based on what it finds it will identify its satellite of origin and then it will be able to calculate its position. This means that the time it will take to calculate your position for the first time will be between 5 and 10 minutes, depending on the quality of the signal you receive. Once the receiver obtains this data, the next calculations will be much faster, on the order of 0.3 s and 1 min on reset.

In the same way, if the receiver is located in a closed place, such as a parking lot, it will not be able to detect the signal from the satellites and therefore will not be able to calculate its position at that moment. However, highly sensitive GPS receivers have been developed that can detect weaker satellite signals, even if they are attenuated by walls or adverse atmospheric conditions, although not in environments that are hostile to signals, such as underground parking lots, etc.

The operation of a GPS system supported by GPRS would be as follows:

1. Modem recognizes movement in distance (Position)

2. Sim inside the modem sends a data packet with the location

3. Cellular network receives data packets and transfers them through the established APN (Private connection)

4. Decode data packet (Location translation to place it on a plane)

5. Insertion of coordinates (longitude, latitude) into a map (Tracking Platform).

In the case of data transmission, in the beginning the main medium was the radio, later cellular technology was used (generating a call) or through text messages (SMS). Currently, most modern systems use cellular technologies designed for data transmission such as GSM/GPRS, CDMA/1xRTT and EDGE among others, taking advantage of the great coverage of these data networks today and the advantage that transmission charging is normally carried out by kilobytes transmitted and not by connection time.

Additionally, given the low costs and the minimum bandwidth used by this technology, the use of satellite technology for data transmission is becoming more common, with the advantage of its global coverage anywhere on the planet, which is essential for applications such as navigation, mining or forestry that work in areas where there is normally no cellular network coverage.

AVL technology is a powerful tool in transportation fleet management applications, emergency vehicle allocation, public transportation systems, etc. especially if it is integrated with other related applications such as Call Center systems, Central Monitoring, route planners, warehouse systems and WMS and dispatch systems among others.

Nowadays, when most people think of GPS they are actually thinking of AVL since GPS equipment is part of AVL technology but it does not involve transmitting position data to a remote location, but rather using it locally, as a mountain climber or a desert rally competitor might do.

This technology can offer competitive advantages to a company since with the automated vehicle tracking system it is possible to reduce delivery times using a data collection sheet, and thus analyze the speed with which its fleet advances, the time and place in which it is located, blockages, delays, optimizing its deliveries, therefore, having exact itineraries, offering better service to its client.

It is a tool that can optimize the supply chain, since it will allow us to have better logistics, being able to control times and movements of truck operators, compile transportation times, mark defined routes and thus avoid loss of time.

It can help reduce costs, since with this system it is possible to know the amount of fuel the vehicle uses, information on how much the driver accelerates or brakes, thus allowing the wear of parts to be calculated, the air pressure exerted on the vehicle depending on the places it travels; All of this is used to schedule corrective maintenance") or perform preventive maintenance"), and therefore reduce costs.

Another common use of RVA is to secure the cargo being transported, considering that it has considerable value, since the system allows the vehicle to be found in the event of theft; there are providers that offer legal advice and promise to recover the vehicle in a short time.

It is a tool that allows us to offer value-added services such as active monitoring, where the monitoring center carries out continuous monitoring via the GPS platform and by telephone with the operator in order to carry out the established protocol of authorized route, authorized stops, authorized times in order to comply with the security and logistics required by the client.[2]​.

Each provider of this service offers useful advantages that, depending on your needs, must be analyzed and chosen to achieve greater benefits in your company. These can be considered an excellent source of information and the best resource to better understand the operation and use of this technology. Among the products that different companies offer and use are different online systems, that is, wireless data transmission systems which vary depending on their use and range from SMS messages, Internet portals, hidden devices, GPS, geo-locators, among others.

GOMEZ, GUILLERMO. Functional testing manual for monitoring, Ed. CIRCULO CORP, México, 2016. Pp 1-10.