## 4 System Testing and Performance
### System Deployment in the Real Scenario
The results showed, as depicted in Figure 10, that such data could be collected in an effective, fast and reliable manner, without having to incur the costs in terms of funds and time when using a team of people to collect that information from ground positions. When collected, data are formatted as Comma Separated Values (CSV) files, so data processing and visualization becomes simpler for common end users. As can be seen from the previous image, there was a large collection of parameters that were obtained from the measuring UAV used to gather the data and the 4G that was sampled during the UAV flight. The ones that show important features related to our study are as follows:  
1. Sim: refers to the Subscriber Identity Module (SIM) card number used by the smartphone mounted as part of the MDAS subsystem running in combination with the UAV. There are two possible slots for SIM cards (1 and 2), depending on the local characteristics of the network mobile system for each country. For European countries, it is number 1. Radio type: references the kind of mobile network used when collecting information. In this case, it is LTE, as previously explained. Other options would be the Global System for Mobile (GSM) communication or Code-Division Multiple Access (CDMA). 2. Radio: reference to the radio signal measured. Since there is no other possible option than LTE (GSM might use General Packet Radio Service (GPRS), for example) it has been labelled as LTE. 3. Carrier: defines which network operator the used network belongs to. As can be seen in Figure 10, in this case it is Orange (France Telecom). 4. MCC: an acronym that means Mobile Country Code (MCC), typical of mobile network systems. Since the experiments were run in Spain, it shows MCC 214. 5. MMC: referred to as Mobile Network Code (MNC), which is the code used to identify the mobile network operator performing operations in a country. Since Orange/France Telecom is the network operator used for this experiment, and the data collection takes place in Spain (with a MCC of 214), it is identified as 3. Figure 10: 4G LTE data signal collected from the UAV mission. * Area: references the Tracking Area Code (TAC) used in LTE communications for area identification, which can range from 0 to 65,535. In the case of the measurements taken, the area is identified as 1250. * cellid: a figure identifying the 4G cell used to collect information. The ones that appear in Figure 10 are 60,683 and 2,081,280, due to the fact that the UAV flew from one cell to another when collecting information. * enbrnc: a node identifier that refers to evolved node base stations that are expected to behave according to the commands received from Radio Network Controllers (RNC) that are linked to the different cells used in the LTE system. Therefore, they have been identified as 237 and 8130 in Figure 10.
* lcid: an acronym that refers to the Logical Channel Identifier used in the corresponding Media Access Control Service Data Unit (MAC SDU) in communications in LTE. It changes several times (11 to 2, 1 and 0) in Figure 10.
* xarfcn: refers to the Absolute Radio-Frequency Channel Number used in the communications; 0 (as shown in Figure 10) is linked to band 1 in LTE. * band: references the band used for mobile communications. While it is shown as zero in Figure 10, it actually means that the very first band in an array of available bands (starting at 0) is the one used here. Therefore, it refers to band 1, which is the first one available on LTE networks. * sigl: refers to the signal level of power. The data collected and displayed in Figure 10 shows how levels go from 2 (the strongest one shown in the figure) to 4 (the weakest), so they summarize the signal power shown afterwards. * ASU: an acronym for Arbitrary Strength Unit, and it is a parameter used for measurement mapping in LTE communications when signal power is taken into account. Thus, the highest ASU figures are the ones where signal power is stronger, and the weakest ones show lower ASU figures in comparison.