Там используют GSM/3g/4g вышки, скорее всего, для корректировки относительно пространства.
Вот статейка. https://www.globe.gov/documents/2631933/6965868/42534991.pdf
Если очень кратко то
"The most basic form of cellular positioning is to use the (known) location of this
base station. This method is known as cell identification (cell ID). Location accuracy
depends solely on the cell size, but this can be enhanced with support of other techniques.
For example, some cells are divided into different sectors by directional base station
antennas which can substantially reduce positional error. Further improvements can be
achieved by using the received signal strength, although signal strength can vary considerably due to fading, topography, obstacles and other factors. Finally, cell ID techniques
can be improved by using the timing advance that is calculated by the base station. These
techniques are referred to as enhanced cell ID or E-CID."
Хотя может могли ( хотя я в это слабо верю, учитывая фиговый уровень связи в полях) и заливать новые координаты.
А может он и вовсе не для защиты. А сделан он для более удобной утилизации тел.
Без контейнера потом их собирать по улицам, а так все вместе.
Вот статейка.
https://www.globe.gov/documents/2631933/6965868/42534991.pdf
Если очень кратко то
"The most basic form of cellular positioning is to use the (known) location of this
base station. This method is known as cell identification (cell ID). Location accuracy
depends solely on the cell size, but this can be enhanced with support of other techniques.
For example, some cells are divided into different sectors by directional base station
antennas which can substantially reduce positional error. Further improvements can be
achieved by using the received signal strength, although signal strength can vary considerably due to fading, topography, obstacles and other factors. Finally, cell ID techniques
can be improved by using the timing advance that is calculated by the base station. These
techniques are referred to as enhanced cell ID or E-CID."
Хотя может могли ( хотя я в это слабо верю, учитывая фиговый уровень связи в полях) и заливать новые координаты.
https://joyreactor.cc/post/1134514
но правда видел больше раз
После таких новостей грех не поверить
https://rg.ru/2014/08/01/sankcii-ipad-site.html (2014 год)
https://ura.news/news/1052348427 (2018 год)
про свежачки не упоминаю
http://vatnik.reactor.cc/post/3051471
...
Ну аккордеон же =) и далеко не первый....