Prylit (touchdown, Ukrainian) - Cruise Missiles Detection and Air Raid Alert App.
Important! Read this! This is not an official government application. Do not rely solely on Prylit air-raid alerts. Use it as an addition to an official government air-defense alert application. Do not ignore local air raid sirens!
Summary:
Problem with older air-defense systems is that they are old and insufficient, only capable of destroying 50-70% of all incoming missiles. Furthermore, current cruise missiles are flying at ultra-low altitudes, making it even harder for air-defense systems to spot them.
Solution is to create an app with crowd-sourced loud noise detection and have the highest possible number of people to install, using it as crowd-sourced data collection. With that we will have consistent data income for analysis and possible missile trajectory detection. Then throw an alert to people located further inside this possible trajectory.
Operational flow:
Once installed and launched, the app starts sending anonymous data that includes noise level and approximate location (300m). The data is sent to secure Google servers. After that, the data is analyzed by special algorithms and the possible trajectory of the missile is calculated. Next, users who are inside this trajectory and using this app at the moment will receive an alert about the impending danger. The more people install the app, the more data is received and analyzed, and the more people will be warned of a possible missile approach.
This app will not warn users about the danger by incoming rocket sound. It would be too late, alas. The warning about the approach of the rocket comes from the servers after processing the signals from the phones of other citizens. A warning means that a missile is moving approximately in the user's direction and it's time to take cover. Thus, the data about the noise level that the user sends to the servers helps to notify other citizens who are in the trajectory of the missile that the user just heard.
User privacy protection:
Two main points on user privacy. 1. App neither recording nor sending any audio files. 2. App is sending only approximate user location (~300m) to servers for further algorithm processing.
1. App is not sending audio recordings from the user's smartphone to the servers. To determine the current noise level, a small audio file is recorded in a temporary folder, after selecting the level, this file is deleted. This whole process takes milliseconds. Only the noise level and approximate coordinates (~300m) are sent to the server for processing.
2. Exact and approximate location permissions explanation. To collect location data in the background, starting with Android 10, the application must be granted all location permissions. This includes approximate and exact location, along with allowing the app to run in the background. But only the approximate location is sent, which can be checked in the application by linking to the home page.
The data is completely depersonalized and anonymous. Users will be able to track exactly what they sent. The location included in the data packets is approximate within 300 meters. If the data was not used in the calculation of the missile trajectory, it will be deleted after 24 hours.
Important! Read this! This is not an official government application. Do not rely solely on Prylit air-raid alerts. Use it as an addition to an official government air-defense alert application. Do not ignore local air raid sirens!
Summary:
Problem with older air-defense systems is that they are old and insufficient, only capable of destroying 50-70% of all incoming missiles. Furthermore, current cruise missiles are flying at ultra-low altitudes, making it even harder for air-defense systems to spot them.
Solution is to create an app with crowd-sourced loud noise detection and have the highest possible number of people to install, using it as crowd-sourced data collection. With that we will have consistent data income for analysis and possible missile trajectory detection. Then throw an alert to people located further inside this possible trajectory.
Operational flow:
Once installed and launched, the app starts sending anonymous data that includes noise level and approximate location (300m). The data is sent to secure Google servers. After that, the data is analyzed by special algorithms and the possible trajectory of the missile is calculated. Next, users who are inside this trajectory and using this app at the moment will receive an alert about the impending danger. The more people install the app, the more data is received and analyzed, and the more people will be warned of a possible missile approach.
This app will not warn users about the danger by incoming rocket sound. It would be too late, alas. The warning about the approach of the rocket comes from the servers after processing the signals from the phones of other citizens. A warning means that a missile is moving approximately in the user's direction and it's time to take cover. Thus, the data about the noise level that the user sends to the servers helps to notify other citizens who are in the trajectory of the missile that the user just heard.
User privacy protection:
Two main points on user privacy. 1. App neither recording nor sending any audio files. 2. App is sending only approximate user location (~300m) to servers for further algorithm processing.
1. App is not sending audio recordings from the user's smartphone to the servers. To determine the current noise level, a small audio file is recorded in a temporary folder, after selecting the level, this file is deleted. This whole process takes milliseconds. Only the noise level and approximate coordinates (~300m) are sent to the server for processing.
2. Exact and approximate location permissions explanation. To collect location data in the background, starting with Android 10, the application must be granted all location permissions. This includes approximate and exact location, along with allowing the app to run in the background. But only the approximate location is sent, which can be checked in the application by linking to the home page.
The data is completely depersonalized and anonymous. Users will be able to track exactly what they sent. The location included in the data packets is approximate within 300 meters. If the data was not used in the calculation of the missile trajectory, it will be deleted after 24 hours.
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