| Path Loss Models for Air-to-Ground Radio Channels in Urban Environments Recent countries visiting this post |  |
 | 5 | United States |
 | 3 | Norway |
 | 2 |
| Path Loss Models for Air-to-Ground Radio Channels in Urban Environments Recent countries visiting this post | |
| 5 | United States |
| 3 | Norway |
| 2 |